chamilo-lms2/main/newscorm/learnpathItem.class.php

<?php
/* For licensing terms, see /license.txt */

/**
 * This file contains the lp_item class, that inherits from the learnpath class
 * @package    chamilo.learnpath
 * @author    Yannick Warnier <ywarnier@beeznest.org>
 */

/**
 * lp_item defines items belonging to a learnpath. Each item has a name, a score, a use time and additional
 * information that enables tracking a user's progress in a learning path
 */
class learnpathItem
{
    public $attempt_id; // Also called "objectives" SCORM-wise.
    public $audio; // The path to an audio file (stored in document/audio/).
    public $children = array(); // Contains the ids of children items.
    public $condition; // If this item has a special condition embedded.
    public $current_score;
    public $current_start_time;
    public $current_stop_time;
    public $current_data = '';
    public $db_id;
    public $db_item_view_id = '';
    public $description = '';
    public $file;
    // At the moment, interactions are just an array of arrays with a structure of 8 text fields
    // id(0), type(1), time(2), weighting(3), correct_responses(4), student_response(5), result(6), latency(7)
    public $interactions = array();
    public $interactions_count = 0;
    public $objectives = array();
    public $objectives_count = 0;
    public $launch_data = '';
    public $lesson_location = '';
    public $level = 0;
    public $core_exit = '';
    //var $location; // Only set this for SCORM?
    public $lp_id;
    public $max_score;
    public $mastery_score;
    public $min_score;
    public $max_time_allowed = '';
    public $name;
    public $next;
    public $parent;
    public $path; // In some cases the exo_id = exercise_id in courseDb exercices table.
    public $possible_status = array('not attempted', 'incomplete', 'completed', 'passed', 'failed', 'browsed');
    public $prereq_string = '';
    public $prereq_alert = '';
    public $prereqs = array();
    public $previous;
    public $prevent_reinit = 1; // 0 =  multiple attempts   1 = one attempt
    public $seriousgame_mode;
    public $ref;
    public $save_on_close = true;
    public $search_did = null;
    public $status;
    public $title;
    public $type; // This attribute can contain chapter|link|student_publication|module|quiz|document|forum|thread
    public $view_id;
    //var used if absolute session time mode is used
    private $last_scorm_session_time = 0;
    const debug = 0; // Logging parameter.
    /**
     * Class constructor. Prepares the learnpath_item for later launch
     *
     * Don't forget to use set_lp_view() if applicable after creating the item.
     * Setting an lp_view will finalise the item_view data collection
     * @param    integer    Learnpath item ID
     * @param    integer    User ID
     * @param    integer    course int id
     * @return    boolean    True on success, false on failure
     */

    public function __construct($id, $user_id = null, $course_id = null, $item_content = null)
    {
        // Get items table.
        if (!isset($user_id)) {
            $user_id = api_get_user_id();
        }
        if (self::debug > 0) {
            error_log(
                "learnpathItem constructor: id: $id user_id: $user_id course_id: $course_id item_content: $item_content",
                0
            );
        }
        $id = intval($id);

        if (empty($item_content)) {
            $items_table = Database::get_course_table(TABLE_LP_ITEM);
            if (empty($course_id)) {
                $course_id = api_get_course_int_id();
            } else {
                $course_id = intval($course_id);
            }
            $sql = "SELECT * FROM $items_table WHERE c_id = $course_id AND id = $id";
            //error_log('New LP - Creating item object from DB: '.$sql, 0);
            $res = Database::query($sql);
            if (Database::num_rows($res) < 1) {
                $this->error = 'Could not find given learnpath item in learnpath_item table';

                return false;
            }
            $row = Database::fetch_array($res);
        } else {
            $row = $item_content;
        }

        $this->lp_id = $row['lp_id'];
        $this->max_score = $row['max_score'];
        $this->min_score = $row['min_score'];
        $this->name = $row['title'];
        $this->type = $row['item_type'];
        $this->ref = $row['ref'];
        $this->title = $row['title'];
        $this->description = $row['description'];
        $this->path = $row['path'];
        $this->mastery_score = $row['mastery_score'];
        $this->parent = $row['parent_item_id'];
        $this->next = $row['next_item_id'];
        $this->previous = $row['previous_item_id'];
        $this->display_order = $row['display_order'];
        $this->prereq_string = $row['prerequisite'];
        $this->max_time_allowed = $row['max_time_allowed'];
        if (isset($row['launch_data'])) {
            $this->launch_data = $row['launch_data'];
        }
        $this->save_on_close = true;
        $this->db_id = $id;
        //$this->seriousgame_mode = $this->get_seriousgame_mode();
        $this->seriousgame_mode = 0;

        // Get search_did.
        if (api_get_setting('search_enabled') == 'true') {
            $tbl_se_ref = Database::get_main_table(TABLE_MAIN_SEARCH_ENGINE_REF);
            $sql = 'SELECT * FROM %s WHERE course_code=\'%s\' AND tool_id=\'%s\' AND ref_id_high_level=%s AND ref_id_second_level=%d LIMIT 1';
            // TODO: Verify if it's possible to assume the actual course instead of getting it from db.
            $sql = sprintf($sql, $tbl_se_ref, api_get_course_id(), TOOL_LEARNPATH, $this->lp_id, $id);
            if (self::debug > 0) {
                error_log($sql);
            }
            ;
            $res = Database::query($sql);
            if (Database::num_rows($res) > 0) {
                $se_ref = Database::fetch_array($res);
                $this->search_did = (int)$se_ref['search_did'];
            }
        }
        $this->audio = $row['audio'];
        if (self::debug > 0) {
            error_log('New LP - End of learnpathItem constructor for item '.$id, 0);
        }

        return true;
    }

    /**
     * Adds a child to the current item
     */
    public function add_child($item)
    {
        if (self::debug > 0) {
            error_log('learnpathItem::add_child()', 0);
        }
        if (!empty($item)) {
            // Do not check in DB as we expect the call to come from the learnpath class which should
            // be aware of any fake.
            $this->children[] = $item;
        }
    }

    /**
     * Adds an interaction to the current item
     * @param    int        Index (order ID) of the interaction inside this item
     * @param    array    Array of parameters: id(0), type(1), time(2), weighting(3), correct_responses(4), student_response(5), result(6), latency(7)
     * @result    void
     */
    public function add_interaction($index, $params)
    {
        $this->interactions[$index] = $params;
        // Take the current maximum index to generate the interactions_count.
        if (($index + 1) > $this->interactions_count) {
            $this->interactions_count = $index + 1;
        }
    }

    /**
     * Adds an objective to the current item
     * @param    array    Array of parameters: id(0), status(1), score_raw(2), score_max(3), score_min(4)
     * @result    void
     */
    public function add_objective($index, $params)
    {
        if (empty($params[0])) {
            return null;
        }
        $this->objectives[$index] = $params;
        // Take the current maximum index to generate the objectives_count.
        if ((count($this->objectives) + 1) > $this->objectives_count) {
            $this->objectives_count = (count($this->objectives) + 1);
        }
    }

    /**
     * Closes/stops the item viewing. Finalises runtime values. If required, save to DB.
     * @return    boolean    True on success, false otherwise
     */
    public function close()
    {
        if (self::debug > 0) {
            error_log('learnpathItem::close()', 0);
        }
        $this->current_stop_time = time();
        $type = $this->get_type();
        if ($type != 'sco') {
            if ($type == TOOL_QUIZ or $type == TOOL_HOTPOTATOES) {
                $this->get_status(true, true); // Update status (second option forces the update).
            } else {
                $this->status = $this->possible_status[2];
            }
        }
        if ($this->save_on_close) {
            $this->save();
        }

        return true;
    }

    /**
     * Deletes all traces of this item in the database
     * @return    boolean    true. Doesn't check for errors yet.
     */
    public function delete()
    {
        if (self::debug > 0) {
            error_log('learnpath_item::delete() for item '.$this->db_id, 0);
        }
        $lp_item_view = Database::get_course_table(TABLE_LP_ITEM_VIEW);
        $lp_item = Database::get_course_table(TABLE_LP_ITEM);

        $course_id = api_get_course_int_id();

        $sql_del_view = "DELETE FROM $lp_item_view WHERE c_id = $course_id AND lp_item_id = ".$this->db_id;
        if (self::debug > 0) {
            error_log('Deleting from lp_item_view: '.$sql_del_view, 0);
        }
        Database::query($sql_del_view);

        $sql_sel = "SELECT * FROM $lp_item WHERE c_id = $course_id AND id = ".$this->db_id;
        $res_sel = Database::query($sql_sel);
        if (Database::num_rows($res_sel) < 1) {
            return false;
        }

        $sql_del_item = "DELETE FROM $lp_item WHERE c_id = $course_id AND id = ".$this->db_id;
        Database::query($sql_del_item);
        if (self::debug > 0) {
            error_log('Deleting from lp_item: '.$sql_del_view);
        }

        if (api_get_setting('search_enabled') == 'true') {
            if (!is_null($this->search_did)) {
                require_once api_get_path(LIBRARY_PATH).'search/ChamiloIndexer.class.php';
                $di = new ChamiloIndexer();
                $di->remove_document($this->search_did);
            }
        }

        return true;
    }

    /**
     * Drops a child from the children array
     * @param    string index of child item to drop
     * @return     void
     */
    public function drop_child($item)
    {
        if (self::debug > 0) {
            error_log('learnpathItem::drop_child()', 0);
        }
        if (!empty($item)) {
            foreach ($this->children as $index => $child) {
                if ($child == $item) {
                    $this->children[$index] = null;
                }
            }
        }
    }

    /**
     * Gets the current attempt_id for this user on this item
     * @return    integer    The attempt_id for this item view by this user, or 1 if none defined
     */
    public function get_attempt_id()
    {
        if (self::debug > 0) {
            error_log('learnpathItem::get_attempt_id() on item '.$this->db_id, 0);
        }
        $res = 1;
        if (!empty($this->attempt_id)) {
            $res = $this->attempt_id;
        }
        if (self::debug > 0) {
            error_log('New LP - End of learnpathItem::get_attempt_id() on item '.$this->db_id.' - Returning '.$res, 0);
        }

        return $res;
    }

    /**
     * Gets a list of the item's children
     * @return    array    Array of children items IDs
     */
    public function get_children()
    {
        if (self::debug > 0) {
            error_log('learnpathItem::get_children()', 0);
        }
        $list = array();
        foreach ($this->children as $child) {
            if (!empty($child)) {
                //error_log('New LP - Found '.$child, 0);
                $list[] = $child;
            }
        }

        return $list;
    }

    /**
     * Gets the core_exit value from the database
     */
    public function get_core_exit()
    {
        return $this->core_exit;
    }

    /**
     * Gets the credit information (rather scorm-stuff) based on current status and reinit
     * autorization. Credit tells the sco(content) if Chamilo will record the data it is sent (credit) or not (no-credit)
     * @return    string    'credit' or 'no-credit'. Defaults to 'credit' because if we don't know enough about this item, it's probably because it was never used before.
     */
    public function get_credit()
    {
        if (self::debug > 1) {
            error_log('learnpathItem::get_credit()', 0);
        }
        $credit = 'credit';
        // Now check the value of prevent_reinit (if it's 0, return credit as the default was).
        if ($this->get_prevent_reinit() != 0) { // If prevent_reinit == 1 (or more).
            // If status is not attempted or incomplete, credit anyway. Otherwise:
            // Check the status in the database rather than in the object, as checking in the object
            // would always return "no-credit" when we want to set it to completed.
            $status = $this->get_status(true);
            if (self::debug > 2) {
                error_log('learnpathItem::get_credit() - get_prevent_reinit!=0 and status is '.$status, 0);
            }
            //0=not attempted - 1 = incomplete
            if ($status != $this->possible_status[0] && $status != $this->possible_status[1]) {
                $credit = 'no-credit';
            }
        }
        if (self::debug > 1) {
            error_log("learnpathItem::get_credit() returns: $credit");
        }

        return $credit;
    }

    /**
     * Gets the current start time property
     * @return    integer    Current start time, or current time if none
     */
    public function get_current_start_time()
    {
        if (self::debug > 0) {
            error_log('learnpathItem::get_current_start_time()', 0);
        }
        if (empty($this->current_start_time)) {
            return time();
        } else {
            return $this->current_start_time;
        }
    }

    /**
     * Gets the item's description
     * @return    string    Description
     */
    public function get_description()
    {
        if (self::debug > 0) {
            error_log('learnpathItem::get_description()', 0);
        }
        if (empty($this->description)) {
            return '';
        }

        return $this->description;
    }

    /**
     * Gets the file path from the course's root directory, no matter what tool it is from.
     * @return    string    The file path, or an empty string if there is no file attached, or '-1' if the file must be replaced by an error page
     */
    public function get_file_path($path_to_scorm_dir = '')
    {
        $course_id = api_get_course_int_id();
        if (self::debug > 0) {
            error_log('learnpathItem::get_file_path()', 0);
        }
        $path = $this->get_path();
        $type = $this->get_type();
        if (empty($path)) {
            if ($type == 'dokeos_chapter' || $type == 'chapter' || $type == 'dir') {
                return '';
            } else {
                return '-1';
            }
        } elseif ($path == strval(intval($path))) {
            // The path is numeric, so it is a reference to a Chamilo object.
            switch ($type) {
                case 'dokeos_chapter':
                case 'dir':
                case 'chapter':
                    return '';
                case TOOL_DOCUMENT:
                    $table_doc = Database::get_course_table(TABLE_DOCUMENT);
                    $sql = 'SELECT path FROM '.$table_doc.' WHERE c_id = '.$course_id.' AND id = '.$path;
                    $res = Database::query($sql);
                    $row = Database::fetch_array($res);
                    $real_path = 'document'.$row['path'];

                    return $real_path;
                case TOOL_STUDENTPUBLICATION:
                case TOOL_QUIZ:
                case TOOL_FORUM:
                case TOOL_THREAD:
                case TOOL_LINK:
                default:
                    return '-1';
            }
        } else {
            if (!empty($path_to_scorm_dir)) {
                $path = $path_to_scorm_dir.$path;
            }

            return $path;
        }
    }

    /**
     * Gets the DB ID
     * @return    integer    Database ID for the current item
     */
    public function get_id()
    {
        if (self::debug > 1) {
            error_log('learnpathItem::get_id()', 0);
        }
        if (!empty($this->db_id)) {
            return $this->db_id;
        }

        // TODO: Check this return value is valid for children classes (SCORM?).
        return 0;
    }

    /**
     * Loads the interactions into the item object, from the database.
     * If object interactions exist, they will be overwritten by this function,
     * using the database elements only.
     * @return void Directly sets the interactions attribute in memory
     */
    public function load_interactions()
    {
        $this->interactions = array();
        $course_id = api_get_course_int_id();
        $tbl = Database::get_course_table(TABLE_LP_ITEM_VIEW);
        $sql = "SELECT id FROM $tbl ".
            "WHERE c_id = $course_id AND lp_item_id = ".$this->db_id." ".
            "AND   lp_view_id = ".$this->view_id." ".
            "AND   view_count = ".$this->attempt_id;
        $res = Database::query($sql);
        if (Database::num_rows($res) > 0) {
            $row = Database::fetch_array($res);
            $lp_iv_id = $row[0];
            $iva_table = Database::get_course_table(TABLE_LP_IV_INTERACTION);
            $iva_sql = "SELECT * FROM $iva_table ".
                "WHERE c_id = $course_id AND lp_iv_id = $lp_iv_id ";
            $res_sql = Database::query($iva_sql);
            while ($row = Database::fetch_array($res_sql)) {
                $this->interactions[$row['interaction_id']] = array(
                    $row['interaction_id'],
                    $row['interaction_type'],
                    $row['weighting'],
                    $row['completion_time'],
                    $row['correct_responses'],
                    $row['student_responses'],
                    $row['result'],
                    $row['latency']
                );
            }
        }
    }

    /**
     * Gets the current count of interactions recorded in the database
     * @param   bool    Whether to count from database or not (defaults to no)
     * @return    int    The current number of interactions recorder
     */
    public function get_interactions_count($checkdb = false)
    {
        if (self::debug > 1) {
            error_log('learnpathItem::get_interactions_count()', 0);
        }
        $return = 0;
        $course_id = api_get_course_int_id();

        if ($checkdb) {
            $tbl = Database::get_course_table(TABLE_LP_ITEM_VIEW);
            $sql = "SELECT id FROM $tbl ".
                "WHERE c_id = $course_id AND lp_item_id = ".$this->db_id." ".
                "AND   lp_view_id = ".$this->view_id." ".
                "AND   view_count = ".$this->get_attempt_id();
            $res = Database::query($sql);
            if (Database::num_rows($res) > 0) {
                $row = Database::fetch_array($res);
                $lp_iv_id = $row[0];
                $iva_table = Database::get_course_table(TABLE_LP_IV_INTERACTION);
                $iva_sql = "SELECT count(id) as mycount FROM $iva_table ".
                    "WHERE c_id = $course_id AND lp_iv_id = $lp_iv_id ";
                $res_sql = Database::query($iva_sql);
                if (Database::num_rows($res_sql) > 0) {
                    $row = Database::fetch_array($res_sql);
                    $return = $row['mycount'];
                }
            }
        } else {
            if (!empty($this->interactions_count)) {
                $return = $this->interactions_count;
            }
        }

        return $return;
    }

    /**
     * Gets the JavaScript array content to fill the interactions array.
     * @params  bool    Whether to check directly into the database (default no)
     * @return  string  An empty string if no interaction, a JS array definition otherwise
     */
    public function get_interactions_js_array($checkdb = false)
    {
        $return = '';
        if ($checkdb) {
            $this->load_interactions(true);
        }
        foreach ($this->interactions as $id => $in) {
            $return .= "['$id','".$in[1]."','".$in[2]."','".$in[3]."','".$in[4]."','".$in[5]."','".$in[6]."','".$in[7]."'],";
        }
        if (!empty($return)) {
            $return = substr($return, 0, -1);
        }

        return $return;
    }

    /**
     * Gets the current count of objectives recorded in the database
     * @return    int    The current number of objectives recorder
     */
    public function get_objectives_count()
    {
        if (self::debug > 1) {
            error_log('learnpathItem::get_objectives_count()', 0);
        }
        $res = 0;
        if (!empty($this->objectives_count)) {
            $res = $this->objectives_count;
        }

        return $res;
    }

    /**
     * Gets the launch_data field found in imsmanifests (this is SCORM- or AICC-related, really)
     * @return    string    Launch data as found in imsmanifest and stored in Chamilo (read only). Defaults to ''.
     */
    public function get_launch_data()
    {
        if (self::debug > 0) {
            error_log('learnpathItem::get_launch_data()', 0);
        }
        if (!empty($this->launch_data)) {
            return $this->launch_data;
        }

        return '';
    }

    /**
     * Gets the lesson location
     * @return string    lesson location as recorded by the SCORM and AICC elements. Defaults to ''
     */
    public function get_lesson_location()
    {
        if (self::debug > 0) {
            error_log('learnpathItem::get_lesson_location()', 0);
        }
        if (!empty($this->lesson_location)) {
            return $this->lesson_location;
        } else {
            return '';
        }
    }

    /**
     * Gets the lesson_mode (scorm feature, but might be used by aicc as well as dokeos paths)
     *
     * The "browse" mode is not supported yet (because there is no such way of seeing a sco in Chamilo)
     * @return    string    'browse','normal' or 'review'. Defaults to 'normal'
     */
    public function get_lesson_mode()
    {
        $mode = 'normal';
        if ($this->get_prevent_reinit() != 0) { // If prevent_reinit == 0
            $my_status = $this->get_status();
            if ($my_status != $this->possible_status[0] && $my_status != $this->possible_status[1]) {
                $mode = 'review';
            }
        }

        return $mode;
    }

    /**
     * Gets the depth level
     * @return int    Level. Defaults to 0
     */
    public function get_level()
    {
        if (self::debug > 0) {
            error_log('learnpathItem::get_level()', 0);
        }
        if (empty($this->level)) {
            return 0;
        }

        return $this->level;
    }

    /**
     * Gets the mastery score
     */
    public function get_mastery_score()
    {
        if (self::debug > 0) {
            error_log('learnpathItem::get_mastery_score()', 0);
        }
        if (isset($this->mastery_score)) {
            return $this->mastery_score;
        } else {
            return -1;
        }
    }

    /**
     * Gets the maximum (score)
     * @return    int    Maximum score. Defaults to 100 if nothing else is defined
     */
    public function get_max()
    {
        if (self::debug > 0) {
            error_log('learnpathItem::get_max()', 0);
        }
        if ($this->type == 'sco') {
            if (isset($this->view_max_score) && !empty($this->view_max_score) && $this->view_max_score > 0) {
                return $this->view_max_score;
            } elseif (isset($this->view_max_score) && $this->view_max_score === '') {
                return $this->view_max_score;
            } else {
                if (!empty($this->max_score)) {
                    return $this->max_score;
                } else {
                    return 100;
                }
            }
        } else {
            if (!empty($this->max_score)) {
                return $this->max_score;
            } else {
                return 100;
            }
        }
    }

    /**
     * Gets the maximum time allowed for this user in this attempt on this item
     * @return    string    Time string in SCORM format (HH:MM:SS or HH:MM:SS.SS or HHHH:MM:SS.SS)
     */
    public function get_max_time_allowed()
    {
        if (self::debug > 0) {
            error_log('learnpathItem::get_max_time_allowed()', 0);
        }
        if (!empty($this->max_time_allowed)) {
            return $this->max_time_allowed;
        } else {
            return '';
        }
    }

    /**
     * Gets the minimum (score)
     * @return int    Minimum score. Defaults to 0
     */
    public function get_min()
    {
        if (self::debug > 0) {
            error_log('learnpathItem::get_min()', 0);
        }
        if (!empty($this->min_score)) {
            return $this->min_score;
        } else {
            return 0;
        }
    }

    /**
     * Gets the parent ID
     * @return    int    Parent ID. Defaults to null
     */
    public function get_parent()
    {
        if (self::debug > 0) {
            error_log('learnpathItem::get_parent()', 0);
        }
        if (!empty($this->parent)) {
            return $this->parent;
        }

        // TODO: Check this return value is valid for children classes (SCORM?).
        return null;
    }

    /**
     * Gets the path attribute.
     * @return    string    Path. Defaults to ''
     */
    public function get_path()
    {
        if (self::debug > 0) {
            error_log('learnpathItem::get_path()', 0);
        }
        if (empty($this->path)) {
            return '';
        }

        return $this->path;
    }

    /**
     * Gets the prerequisites string
     * @return    string    Empty string or prerequisites string if defined. Defaults to
     */
    public function get_prereq_string()
    {
        if (self::debug > 0) {
            error_log('learnpathItem::get_prereq_string()', 0);
        }
        if (!empty($this->prereq_string)) {
            return $this->prereq_string;
        } else {
            return '';
        }
    }

    /**
     * Gets the prevent_reinit attribute value (and sets it if not set already)
     * @return    int    1 or 0 (defaults to 1)
     */
    public function get_prevent_reinit()
    {
        $course_id = api_get_course_int_id();
        if (self::debug > 2) {
            error_log('learnpathItem::get_prevent_reinit()', 0);
        }
        if (!isset($this->prevent_reinit)) {
            if (!empty($this->lp_id)) {
                $table = Database::get_course_table(TABLE_LP_MAIN);
                $sql = "SELECT prevent_reinit FROM $table WHERE c_id = $course_id AND id = ".$this->lp_id;
                $res = Database::query($sql);
                if (Database::num_rows($res) < 1) {
                    $this->error = "Could not find parent learnpath in learnpath table";
                    if (self::debug > 2) {
                        error_log('New LP - End of learnpathItem::get_prevent_reinit() - Returning false', 0);
                    }

                    return false;
                } else {
                    $row = Database::fetch_array($res);
                    $this->prevent_reinit = $row['prevent_reinit'];
                }
            } else {
                $this->prevent_reinit = 1; // Prevent reinit is always 1 by default - see learnpath.class.php.
            }
        }
        if (self::debug > 2) {
            error_log('New LP - End of learnpathItem::get_prevent_reinit() - Returned '.$this->prevent_reinit, 0);
        }

        return $this->prevent_reinit;
    }

    /**
     * Returns 1 if seriousgame_mode is activated, 0 otherwise
     *
     * @return int (0 or 1)
     * @author ndiechburg <noel@cblue.be>
     * */
    public function get_seriousgame_mode()
    {
        if (self::debug > 2) {
            error_log('learnpathItem::get_seriousgame_mode()', 0);
        }
        $course_id = api_get_course_int_id();
        if (!isset($this->seriousgame_mode)) {
            if (!empty($this->lp_id)) {
                $table = Database::get_course_table(TABLE_LP_MAIN);
                $sql = "SELECT seriousgame_mode FROM $table WHERE c_id = $course_id AND id = ".$this->lp_id;
                $res = @Database::query($sql);
                if (Database::num_rows($res) < 1) {
                    $this->error = "Could not find parent learnpath in learnpath table";
                    if (self::debug > 2) {
                        error_log('New LP - End of learnpathItem::get_seriousgame_mode() - Returning false', 0);
                    }

                    return false;
                } else {
                    $row = Database::fetch_array($res);
                    $this->seriousgame_mode = isset($row['seriousgame_mode']) ? $row['seriousgame_mode'] : 0;
                }
            } else {
                $this->seriousgame_mode = 0; //SeriousGame mode is always off by default
            }
        }
        if (self::debug > 2) {
            error_log('New LP - End of learnpathItem::get_seriousgame_mode() - Returned '.$this->seriousgame_mode, 0);
        }

        return $this->seriousgame_mode;
    }

    /**
     * Gets the item's reference column
     * @return string    The item's reference field (generally used for SCORM identifiers)
     */
    public function get_ref()
    {
        return $this->ref;
    }

    /**
     * Gets the list of included resources as a list of absolute or relative paths of
     * resources included in the current item. This allows for a better SCORM export.
     * The list will generally include pictures, flash objects, java applets, or any other
     * stuff included in the source of the current item. The current item is expected
     * to be an HTML file. If it is not, then the function will return and empty list.
     * @param    string    type (one of the Chamilo tools) - optional (otherwise takes the current item's type)
     * @param    string    path (absolute file path) - optional (otherwise takes the current item's path)
     * @param    int        level of recursivity we're in
     * @return    array    List of file paths. An additional field containing 'local' or 'remote' helps determine if the file should be copied into the zip or just linked
     */
    public function get_resources_from_source($type = null, $abs_path = null, $recursivity = 1)
    {
        $max = 5;
        if ($recursivity > $max) {
            return array();
        }
        if (!isset($type)) {
            $type = $this->get_type();
        }
        if (!isset($abs_path)) {
            $path = $this->get_file_path();
            $abs_path = api_get_path(SYS_COURSE_PATH).api_get_course_path().'/'.$path;
            //echo "Abs path coming from item : ".$abs_path."<br />\n";
        }
        /*
          else {
          echo "Abs path coming from param: ".$abs_path."<br />\n";
          }
         */
        //error_log(str_repeat(' ',$recursivity).'Analyse file '.$abs_path, 0);
        $files_list = array();
        $type = $this->get_type();

        switch ($type) {
            case TOOL_DOCUMENT :
            case TOOL_QUIZ:
            case 'sco':
                // Get the document and, if HTML, open it.

                if (is_file($abs_path)) {
                    // for now, read the whole file in one go (that's gonna be a problem when the file is too big).
                    $info = pathinfo($abs_path);

                    $ext = $info['extension'];

                    switch (strtolower($ext)) {
                        case 'html':
                        case 'htm':
                        case 'shtml':
                        case 'css':
                            $wanted_attributes = array('src', 'url', '@import', 'href', 'value');
                            // Parse it for included resources.
                            $file_content = file_get_contents($abs_path);
                            // Get an array of attributes from the HTML source.
                            $attributes = DocumentManager::parse_HTML_attributes($file_content, $wanted_attributes);

                            // Look at 'src' attributes in this file
                            foreach ($wanted_attributes as $attr) {
                                if (isset($attributes[$attr])) {
                                    // Find which kind of path these are (local or remote).
                                    $sources = $attributes[$attr];

                                    foreach ($sources as $source) {
                                        // Skip what is obviously not a resource.
                                        if (strpos($source, "+this.")) {
                                            continue;
                                        } // javascript code - will still work unaltered.
                                        if (strpos($source, '.') === false) {
                                            continue;
                                        } // No dot, should not be an external file anyway.
                                        if (strpos($source, 'mailto:')) {
                                            continue;
                                        } // mailto link.
                                        if (strpos($source, ';') && !strpos($source, '&amp;')) {
                                            continue;
                                        } // Avoid code - that should help.

                                        if ($attr == 'value') {
                                            if (strpos($source, 'mp3file')) {
                                                $files_list[] = array(
                                                    substr($source, 0, strpos($source, '.swf') + 4),
                                                    'local',
                                                    'abs'
                                                );
                                                $mp3file = substr($source, strpos($source, 'mp3file=') + 8);
                                                if (substr($mp3file, 0, 1) == '/') {
                                                    $files_list[] = array($mp3file, 'local', 'abs');
                                                } else {
                                                    $files_list[] = array($mp3file, 'local', 'rel');
                                                }
                                            } elseif (strpos($source, 'flv=') === 0) {

                                                $source = substr($source, 4);
                                                if (strpos($source, '&') > 0) {
                                                    $source = substr($source, 0, strpos($source, '&'));
                                                }
                                                if (strpos($source, '://') > 0) {
                                                    if (strpos($source, api_get_path(WEB_PATH)) !== false) {
                                                        // We found the current portal url.
                                                        $files_list[] = array($source, 'local', 'url');
                                                    } else {
                                                        // We didn't find any trace of current portal.
                                                        $files_list[] = array($source, 'remote', 'url');
                                                    }
                                                } else {
                                                    $files_list[] = array($source, 'local', 'abs');
                                                }
                                                continue; // Skipping anything else to avoid two entries (while the others can have sub-files in their url, flv's can't).
                                            }
                                        }

                                        if (strpos($source, '://') > 0) {

                                            // Cut at '?' in a URL with params.
                                            if (strpos($source, '?') > 0) {
                                                $second_part = substr($source, strpos($source, '?'));
                                                if (strpos($second_part, '://') > 0) {
                                                    // If the second part of the url contains a url too, treat the second one before cutting.

                                                    $pos1 = strpos($second_part, '=');
                                                    $pos2 = strpos($second_part, '&');
                                                    $second_part = substr($second_part, $pos1 + 1, $pos2 - ($pos1 + 1));
                                                    if (strpos($second_part, api_get_path(WEB_PATH)) !== false) {
                                                        // We found the current portal url.
                                                        $files_list[] = array($second_part, 'local', 'url');
                                                        $in_files_list[] = learnpathItem::get_resources_from_source(
                                                            TOOL_DOCUMENT,
                                                            $second_part,
                                                            $recursivity + 1
                                                        );
                                                        if (count($in_files_list) > 0) {
                                                            $files_list = array_merge($files_list, $in_files_list);
                                                        }
                                                    } else {
                                                        // We didn't find any trace of current portal.
                                                        $files_list[] = array($second_part, 'remote', 'url');
                                                    }
                                                } elseif (strpos($second_part, '=') > 0) {
                                                    if (substr($second_part, 0, 1) === '/') {
                                                        // Link starts with a /, making it absolute (relative to DocumentRoot).
                                                        $files_list[] = array($second_part, 'local', 'abs');
                                                        $in_files_list[] = learnpathItem::get_resources_from_source(
                                                            TOOL_DOCUMENT,
                                                            $second_part,
                                                            $recursivity + 1
                                                        );
                                                        if (count($in_files_list) > 0) {
                                                            $files_list = array_merge($files_list, $in_files_list);
                                                        }
                                                    } elseif (strstr($second_part, '..') === 0) {
                                                        // Link is relative but going back in the hierarchy.
                                                        $files_list[] = array($second_part, 'local', 'rel');
                                                        $dir = dirname($abs_path);
                                                        $new_abs_path = realpath($dir.'/'.$second_part);
                                                        $in_files_list[] = learnpathItem::get_resources_from_source(
                                                            TOOL_DOCUMENT,
                                                            $new_abs_path,
                                                            $recursivity + 1
                                                        );
                                                        if (count($in_files_list) > 0) {
                                                            $files_list = array_merge($files_list, $in_files_list);
                                                        }
                                                    } else {
                                                        // No starting '/', making it relative to current document's path.
                                                        if (substr($second_part, 0, 2) == './') {
                                                            $second_part = substr($second_part, 2);
                                                        }
                                                        $files_list[] = array($second_part, 'local', 'rel');
                                                        $dir = dirname($abs_path);
                                                        $new_abs_path = realpath($dir.'/'.$second_part);
                                                        $in_files_list[] = learnpathItem::get_resources_from_source(
                                                            TOOL_DOCUMENT,
                                                            $new_abs_path,
                                                            $recursivity + 1
                                                        );
                                                        if (count($in_files_list) > 0) {
                                                            $files_list = array_merge($files_list, $in_files_list);
                                                        }
                                                    }
                                                }
                                                // Leave that second part behind now.
                                                $source = substr($source, 0, strpos($source, '?'));
                                                if (strpos($source, '://') > 0) {
                                                    if (strpos($source, api_get_path(WEB_PATH)) !== false) {
                                                        // We found the current portal url.
                                                        $files_list[] = array($source, 'local', 'url');
                                                        $in_files_list[] = learnpathItem::get_resources_from_source(
                                                            TOOL_DOCUMENT,
                                                            $source,
                                                            $recursivity + 1
                                                        );
                                                        if (count($in_files_list) > 0) {
                                                            $files_list = array_merge($files_list, $in_files_list);
                                                        }
                                                    } else {
                                                        // We didn't find any trace of current portal.
                                                        $files_list[] = array($source, 'remote', 'url');
                                                    }
                                                } else {
                                                    // No protocol found, make link local.
                                                    if (substr($source, 0, 1) === '/') {
                                                        // Link starts with a /, making it absolute (relative to DocumentRoot).
                                                        $files_list[] = array($source, 'local', 'abs');
                                                        $in_files_list[] = learnpathItem::get_resources_from_source(
                                                            TOOL_DOCUMENT,
                                                            $source,
                                                            $recursivity + 1
                                                        );
                                                        if (count($in_files_list) > 0) {
                                                            $files_list = array_merge($files_list, $in_files_list);
                                                        }
                                                    } elseif (strstr($source, '..') === 0) {
                                                        // Link is relative but going back in the hierarchy.
                                                        $files_list[] = array($source, 'local', 'rel');
                                                        $dir = dirname($abs_path);
                                                        $new_abs_path = realpath($dir.'/'.$source);
                                                        $in_files_list[] = learnpathItem::get_resources_from_source(
                                                            TOOL_DOCUMENT,
                                                            $new_abs_path,
                                                            $recursivity + 1
                                                        );
                                                        if (count($in_files_list) > 0) {
                                                            $files_list = array_merge($files_list, $in_files_list);
                                                        }
                                                    } else {
                                                        // No starting '/', making it relative to current document's path.
                                                        if (substr($source, 0, 2) == './') {
                                                            $source = substr($source, 2);
                                                        }
                                                        $files_list[] = array($source, 'local', 'rel');
                                                        $dir = dirname($abs_path);
                                                        $new_abs_path = realpath($dir.'/'.$source);
                                                        $in_files_list[] = learnpathItem::get_resources_from_source(
                                                            TOOL_DOCUMENT,
                                                            $new_abs_path,
                                                            $recursivity + 1
                                                        );
                                                        if (count($in_files_list) > 0) {
                                                            $files_list = array_merge($files_list, $in_files_list);
                                                        }
                                                    }
                                                }
                                            }

                                            // Found some protocol there.
                                            if (strpos($source, api_get_path(WEB_PATH)) !== false) {
                                                // We found the current portal url.
                                                $files_list[] = array($source, 'local', 'url');
                                                $in_files_list[] = learnpathItem::get_resources_from_source(
                                                    TOOL_DOCUMENT,
                                                    $source,
                                                    $recursivity + 1
                                                );
                                                if (count($in_files_list) > 0) {
                                                    $files_list = array_merge($files_list, $in_files_list);
                                                }
                                            } else {
                                                // We didn't find any trace of current portal.
                                                $files_list[] = array($source, 'remote', 'url');
                                            }
                                        } else {
                                            // No protocol found, make link local.
                                            if (substr($source, 0, 1) === '/') {
                                                // Link starts with a /, making it absolute (relative to DocumentRoot).
                                                $files_list[] = array($source, 'local', 'abs');
                                                $in_files_list[] = learnpathItem::get_resources_from_source(
                                                    TOOL_DOCUMENT,
                                                    $source,
                                                    $recursivity + 1
                                                );
                                                if (count($in_files_list) > 0) {
                                                    $files_list = array_merge($files_list, $in_files_list);
                                                }
                                            } elseif (strstr($source, '..') === 0) {
                                                // Link is relative but going back in the hierarchy.
                                                $files_list[] = array($source, 'local', 'rel');
                                                $dir = dirname($abs_path);
                                                $new_abs_path = realpath($dir.'/'.$source);
                                                $in_files_list[] = learnpathItem::get_resources_from_source(
                                                    TOOL_DOCUMENT,
                                                    $new_abs_path,
                                                    $recursivity + 1
                                                );
                                                if (count($in_files_list) > 0) {
                                                    $files_list = array_merge($files_list, $in_files_list);
                                                }
                                            } else {

                                                // No starting '/', making it relative to current document's path.
                                                if (strpos($source, 'width=') || strpos($source, 'autostart=')) {
                                                    continue;
                                                }

                                                if (substr($source, 0, 2) == './') {
                                                    $source = substr($source, 2);
                                                }
                                                $files_list[] = array($source, 'local', 'rel');
                                                $dir = dirname($abs_path);
                                                $new_abs_path = realpath($dir.'/'.$source);
                                                $in_files_list[] = learnpathItem::get_resources_from_source(
                                                    TOOL_DOCUMENT,
                                                    $new_abs_path,
                                                    $recursivity + 1
                                                );
                                                if (count($in_files_list) > 0) {
                                                    $files_list = array_merge($files_list, $in_files_list);
                                                }
                                            }
                                        }
                                    }
                                }
                            }
                            break;
                        default:
                            break;
                    }
                } else {
                    // The file could not be found.
                    return false;
                }
                break;
            default: // Ignore.
                break;
        }
        //error_log(str_repeat(' ', $recursivity), 'found files '.print_r($files_list, true), 0);
        //return $files_list;
        $checked_files_list = array();
        $checked_array_list = array();
        foreach ($files_list as $idx => $file) {
            if (!empty($file[0])) {
                if (!in_array($file[0], $checked_files_list)) {
                    $checked_files_list[] = $files_list[$idx][0];
                    $checked_array_list[] = $files_list[$idx];
                }
            }
        }

        return $checked_array_list;
    }

    /**
     * Gets the score
     * @return    float    The current score or 0 if no score set yet
     */
    public function get_score()
    {
        if (self::debug > 0) {
            error_log('learnpathItem::get_score()', 0);
        }
        $res = 0;
        if (!empty($this->current_score)) {
            $res = $this->current_score;
        }
        if (self::debug > 1) {
            error_log('New LP - Out of learnpathItem::get_score() - returning '.$res, 0);
        }

        return $res;
    }

    /**
     * Gets the item status
     * @param    boolean    Do or don't check into the database for the latest value. Optional. Default is true
     * @param    boolean    Do or don't update the local attribute value with what's been found in DB
     * @return    string    Current status or 'Not attempted' if no status set yet
     */
    public function get_status($check_db = true, $update_local = false)
    {
        $course_id = api_get_course_int_id();
        if (self::debug > 0) {
            error_log('learnpathItem::get_status() on item '.$this->db_id, 0);
        }
        if ($check_db) {
            if (self::debug > 2) {
                error_log('learnpathItem::get_status(): checking db', 0);
            }
            if (!empty($this->db_item_view_id)) {
                $table = Database::get_course_table(TABLE_LP_ITEM_VIEW);
                $sql = "SELECT status FROM $table WHERE c_id = $course_id AND id = '".$this->db_item_view_id."' AND view_count = '".$this->get_attempt_id()."'";
                if (self::debug > 2) {
                    error_log('learnpathItem::get_status() - Checking DB: '.$sql, 0);
                }

                $res = Database::query($sql);
                if (Database::num_rows($res) == 1) {
                    $row = Database::fetch_array($res);
                    if ($update_local) {
                        $this->set_status($row['status']);
                    }
                    if (self::debug > 2) {
                        error_log('learnpathItem::get_status() - Returning db value '.$row['status'], 0);
                    }

                    return $row['status'];
                }
            }
        } else {
            if (self::debug > 2) {
                error_log('learnpathItem::get_status() - in get_status: using attrib', 0);
            }
            if (!empty($this->status)) {
                if (self::debug > 2) {
                    error_log('learnpathItem::get_status() - Returning attrib: '.$this->status, 0);
                }

                return $this->status;
            }
        }
        if (self::debug > 2) {
            error_log('learnpathItem::get_status() - Returning default '.$this->possible_status[0], 0);
        }

        return $this->possible_status[0];
    }

    /**
     * Gets the suspend data
     */
    public function get_suspend_data()
    {
        if (self::debug > 0) {
            error_log('learnpathItem::get_suspend_data()', 0);
        }
        // TODO: Improve cleaning of breaklines ... it works but is it really a beautiful way to do it ?
        if (!empty($this->current_data)) {
            return str_replace(array("\r", "\n"), array('\r', '\n'), $this->current_data);
        } else {
            return '';
        }
    }

    /**
     * Gets the total time spent on this item view so far
     * @param    string    Origin of the request. If coming from PHP, send formatted as xxhxx'xx", otherwise use scorm format 00:00:00
     * @param    integer    Given time is a default time to return formatted
     */
    public function get_scorm_time($origin = 'php', $given_time = null, $query_db = false)
    {
        $time = 0;
        $h = get_lang('h');
        $course_id = api_get_course_int_id();
        if (!isset($given_time)) {
            if (self::debug > 2) {
                error_log('learnpathItem::get_scorm_time(): given time empty, current_start_time = '.$this->current_start_time, 0);
            }
            if (is_object($this)) {
                if ($query_db === true) {
                    $table = Database::get_course_table(TABLE_LP_ITEM_VIEW);
                    $sql = "SELECT start_time, total_time FROM $table
					        WHERE  c_id = $course_id AND
					               id = '".$this->db_item_view_id."' AND
					               view_count = '".$this->get_attempt_id()."'";
                    $res = Database::query($sql);
                    $row = Database::fetch_array($res);
                    $start = $row['start_time'];
                    $stop = $start + $row['total_time'];
                } else {
                    $start = $this->current_start_time;
                    $stop = $this->current_stop_time;
                }
                if (!empty($start)) {
                    if (!empty($stop)) {
                        $time = $stop - $start;
                    } else {
                        $time = time() - $start;
                    }
                }
            } else {
                if ($origin == 'js') {
                    return '00:00:00';
                } else {
                    return '00'.$h.'00\'00"';
                }
            }
        } else {
            $time = $given_time;
        }
        if (self::debug > 2) {
            error_log('learnpathItem::get_scorm_time(): intermediate = '.$time, 0);
        }
        $hours = $time / 3600;
        $mins = ($time % 3600) / 60;
        $secs = ($time % 60);
        if ($origin == 'js') {
            $scorm_time = trim(sprintf("%4d:%02d:%02d", $hours, $mins, $secs));
        } else {
            $scorm_time = trim(sprintf("%4d$h%02d'%02d\"", $hours, $mins, $secs));
        }
        if (self::debug > 2) {
            error_log('learnpathItem::get_scorm_time('.$scorm_time.')', 0);
        }

        return $scorm_time;
    }

    public function get_terms()
    {
        $lp_item = Database::get_course_table(TABLE_LP_ITEM);
        $course_id = api_get_course_int_id();
        $sql = "SELECT * FROM $lp_item WHERE c_id = $course_id AND id='".Database::escape_string($this->db_id)."'";
        $res = Database::query($sql);
        $row = Database::fetch_array($res);

        return $row['terms'];
    }

    /**
     * Returns the item's title
     * @return    string    Title
     */
    public function get_title()
    {
        if (self::debug > 0) {
            error_log('learnpathItem::get_title()', 0);
        }
        if (empty($this->title)) {
            return '';
        }

        return $this->title;
    }

    /**
     * Returns the total time used to see that item
     * @return    integer    Total time
     */
    public function get_total_time()
    {
        $debug = self::debug;
        if ($debug > 0) {
            error_log(
                'learnpathItem::get_total_time() for item '.$this->db_id.' - Initially, current_start_time = '.$this->current_start_time.' and current_stop_time = '.$this->current_stop_time,
                0
            );
        }

        // Shouldn't be necessary thanks to the open() method
        if ($this->current_start_time == 0) {
            if ($debug > 2) {
                error_log('learnpathItem::get_total_time() - Current start time was empty', 0);
            }
            $this->current_start_time = time();
        }

        if (time() < $this->current_stop_time or $this->current_stop_time == 0) {
            if ($debug > 2) {
                error_log(
                    'learnpathItem::get_total_time() - Current stop time was greater than the current time or was empty',
                    0
                );
            }
            // If this case occurs, then we risk to write huge time data in db.
            // In theory, stop time should be *always* updated here, but it might be used in some unknown goal.
            $this->current_stop_time = time();
        }
        $time = $this->current_stop_time - $this->current_start_time;
        if ($time < 0) {
            if ($debug > 2) {
                error_log('learnpathItem::get_total_time() - Time smaller than 0. Returning 0', 0);
            }

            return 0;
        } else {
            if ($debug > 2) {
                error_log(
                    'learnpathItem::get_total_time() - Current start time = '.$this->current_start_time.', current stop time = '.$this->current_stop_time.' Returning '.$time."-----------\n",
                    0
                );
            }
            return $time;
        }
    }

    /**
     * Gets the item type
     * @return    string    The item type (can be doc, dir, sco, asset)
     */
    public function get_type()
    {
        $res = 'asset';
        if (!empty($this->type)) {
            $res = $this->type;
        }
        if (self::debug > 2) {
            error_log('learnpathItem::get_type() - Returning '.$res.' for item '.$this->db_id, 0);
        }

        return $res;
    }

    /**
     * Gets the view count for this item
     * @return  int     Number of attempts or 0
     */
    public function get_view_count()
    {
        if (self::debug > 0) {
            error_log('learnpathItem::get_view_count()', 0);
        }
        if (!empty($this->attempt_id)) {
            return $this->attempt_id;
        } else {
            return 0;
        }
    }

    /**
     * Tells if an item is done ('completed','passed','succeeded') or not
     * @return    bool    True if the item is done ('completed','passed','succeeded'), false otherwise
     */
    function is_done()
    {
        if ($this->status_is(array('completed', 'passed', 'succeeded', 'failed'))) {
            if (self::debug > 2) {
                error_log('learnpath::is_done() - Item '.$this->get_id().' is complete', 0);
            }

            return true;
        } else {
            if (self::debug > 2) {
                error_log('learnpath::is_done() - Item '.$this->get_id().' is not complete', 0);
            }

            return false;
        }
    }

    /**
     * Tells if a restart is allowed (take it from $this->prevent_reinit and $this->status)
     * @return    integer    -1 if retaking the sco another time for credit is not allowed,
     *                      0 if it is not allowed but the item has to be finished
     *                      1 if it is allowed. Defaults to 1
     */
    public function is_restart_allowed()
    {
        if (self::debug > 2) {
            error_log('learnpathItem::is_restart_allowed()', 0);
        }
        $restart = 1;
        $mystatus = $this->get_status(true);
        if ($this->get_prevent_reinit() > 0) { // If prevent_reinit == 1 (or more)
            // If status is not attempted or incomplete, authorize retaking (of the same) anyway. Otherwise:
            if ($mystatus != $this->possible_status[0] && $mystatus != $this->possible_status[1]) {
                $restart = -1;
            } else { //status incompleted or not attempted
                $restart = 0;
            }
        } else {
            if ($mystatus == $this->possible_status[0] || $mystatus == $this->possible_status[1]) {
                $restart = -1;
            }
        }
        if (self::debug > 2) {
            error_log('New LP - End of learnpathItem::is_restart_allowed() - Returning '.$restart, 0);
        }

        return $restart;
    }

    /**
     * Opens/launches the item. Initialises runtime values.
     * @return    boolean    True on success, false on failure.
     */
    public function open($allow_new_attempt = false)
    {
        if (self::debug > 0) {
            error_log('learnpathItem::open()', 0);
        }
        if ($this->prevent_reinit == 0) {
            $this->current_score = 0;
            $this->current_start_time = time();
            // In this case, as we are opening the item, what is important to us
            // is the database status, in order to know if this item has already
            // been used in the past (rather than just loaded and modified by
            // some javascript but not written in the database).
            // If the database status is different from 'not attempted', we can
            // consider this item has already been used, and as such we can
            // open a new attempt. Otherwise, we'll just reuse the current
            // attempt, which is generally created the first time the item is
            // loaded (for example as part of the table of contents).
            $stat = $this->get_status(true);
            if ($allow_new_attempt && isset($stat) && ($stat != $this->possible_status[0])) {
                $this->attempt_id = $this->attempt_id + 1; // Open a new attempt.
            }
            $this->status = $this->possible_status[1];
        } else {
            /* if ($this->current_start_time == 0) {
              // Small exception for start time, to avoid amazing values.
              $this->current_start_time = time();
              } */
            // If we don't init start time here, the time is sometimes calculated from the last start time.
            $this->current_start_time = time();

            //error_log('New LP - reinit blocked by setting', 0);
        }
    }

    /**
     * Outputs the item contents
     * @return    string    HTML file (displayable in an <iframe>) or empty string if no path defined
     */
    function output()
    {
        if (self::debug > 0) {
            error_log('learnpathItem::output()', 0);
        }
        if (!empty($this->path) and is_file($this->path)) {
            $output = '';
            $output .= file_get_contents($this->path);

            return $output;
        }

        return '';
    }

    /**
     * Parses the prerequisites string with the AICC logic language
     * @param    string    The prerequisites string as it figures in imsmanifest.xml
     * @param    Array    Array of items in the current learnpath object. Although we're in the learnpathItem object, it's necessary to have a list of all items to be able to check the current item's prerequisites
     * @param    Array    List of references (the "ref" column in the lp_item table) that are strings used in the expression of prerequisites.
     * @param    integer    The user ID. In some cases like Chamilo quizzes, it's necessary to have the user ID to query other tables (like the results of quizzes)
     * @return    boolean    True if the list of prerequisites given is entirely satisfied, false otherwise
     */
    public function parse_prereq($prereqs_string, $items, $refs_list, $user_id)
    {
        if (self::debug > 0) {
            error_log('learnpathItem::parse_prereq() for learnpath '.$this->lp_id.' with string '.$prereqs_string, 0);
        }

        $course_id = api_get_course_int_id();
        // Deal with &, |, ~, =, <>, {}, ,, X*, () in reverse order.
        $this->prereq_alert = '';
        // First parse all parenthesis by using a sequential loop (looking for less-inclusives first).

        if ($prereqs_string == '_true_') {
            return true;
        }
        if ($prereqs_string == '_false_') {
            if (empty($this->prereq_alert)) {
                $this->prereq_alert = get_lang('LearnpathPrereqNotCompleted');
            }

            return false;
        }
        while (strpos($prereqs_string, '(') !== false) {
            // Remove any () set and replace with its value.
            $matches = array();
            $res = preg_match_all('/(\(([^\(\)]*)\))/', $prereqs_string, $matches);
            if ($res) {
                foreach ($matches[2] as $id => $match) {
                    $str_res = $this->parse_prereq($match, $items, $refs_list, $user_id);
                    if ($str_res) {
                        $prereqs_string = str_replace($matches[1][$id], '_true_', $prereqs_string);
                    } else {
                        $prereqs_string = str_replace($matches[1][$id], '_false_', $prereqs_string);
                    }
                }
            }
        }

        // Parenthesis removed, now look for ORs as it is the lesser-priority binary operator (= always uses one text operand).
        if (strpos($prereqs_string, '|') === false) {
            if (self::debug > 1) {
                error_log('New LP - Didnt find any OR, looking for AND', 0);
            }
            if (strpos($prereqs_string, '&') !== false) {
                $list = split('&', $prereqs_string);
                if (count($list) > 1) {
                    $andstatus = true;
                    foreach ($list as $condition) {
                        $andstatus = $andstatus && $this->parse_prereq($condition, $items, $refs_list, $user_id);
                        if (!$andstatus) {
                            if (self::debug > 1) {
                                error_log('New LP - One condition in AND was false, short-circuit', 0);
                            }
                            break;
                        }
                    }
                    if (empty($this->prereq_alert) && !$andstatus) {
                        $this->prereq_alert = get_lang('LearnpathPrereqNotCompleted');
                    }

                    return $andstatus;
                } else {
                    if (isset($items[$refs_list[$list[0]]])) {
                        $status = $items[$refs_list[$list[0]]]->get_status(true);
                        $returnstatus = (($status == $this->possible_status[2]) OR ($status == $this->possible_status[3]));
                        if (empty($this->prereq_alert) && !$returnstatus) {
                            $this->prereq_alert = get_lang('LearnpathPrereqNotCompleted');
                        }

                        return $returnstatus;
                    }
                    $this->prereq_alert = get_lang('LearnpathPrereqNotCompleted');

                    return false;
                }
            } else {
                // No ORs found, now look for ANDs.

                if (self::debug > 1) {
                    error_log('New LP - Didnt find any AND, looking for =', 0);
                }
                if (strpos($prereqs_string, '=') !== false) {
                    if (self::debug > 1) {
                        error_log('New LP - Found =, looking into it', 0);
                    }
                    // We assume '=' signs only appear when there's nothing else around.
                    $params = split('=', $prereqs_string);
                    if (count($params) == 2) {
                        // Right number of operands.
                        if (isset($items[$refs_list[$params[0]]])) {
                            $status = $items[$refs_list[$params[0]]]->get_status(true);
                            $returnstatus = ($status == $params[1]);
                            if (empty($this->prereq_alert) && !$returnstatus) {
                                $this->prereq_alert = get_lang('LearnpathPrereqNotCompleted');
                            }

                            return $returnstatus;
                        }
                        $this->prereq_alert = get_lang('LearnpathPrereqNotCompleted');

                        return false;
                    }
                } else {
                    // No ANDs found, look for <>

                    if (self::debug > 1) {
                        error_log('New LP - Didnt find any =, looking for <>', 0);
                    }
                    if (strpos($prereqs_string, '<>') !== false) {
                        if (self::debug > 1) {
                            error_log('New LP - Found <>, looking into it', 0);
                        }
                        // We assume '<>' signs only appear when there's nothing else around.
                        $params = split('<>', $prereqs_string);
                        if (count($params) == 2) {
                            // Right number of operands.
                            if (isset($items[$refs_list[$params[0]]])) {
                                $status = $items[$refs_list[$params[0]]]->get_status(true);
                                $returnstatus = ($status != $params[1]);
                                if (empty($this->prereq_alert) && !$returnstatus) {
                                    $this->prereq_alert = get_lang('LearnpathPrereqNotCompleted');
                                }

                                return $returnstatus;
                            }
                            $this->prereq_alert = get_lang('LearnpathPrereqNotCompleted');

                            return false;
                        }
                    } else {
                        // No <> found, look for ~ (unary)
                        if (self::debug > 1) {
                            error_log('New LP - Didnt find any =, looking for ~', 0);
                        }
                        // Only remains: ~ and X*{}
                        if (strpos($prereqs_string, '~') !== false) {
                            // Found NOT.
                            if (self::debug > 1) {
                                error_log('New LP - Found ~, looking into it', 0);
                            }
                            $list = array();
                            $myres = preg_match('/~([^(\d+\*)\{]*)/', $prereqs_string, $list);
                            if ($myres) {
                                $returnstatus = !$this->parse_prereq($list[1], $items, $refs_list, $user_id);
                                if (empty($this->prereq_alert) && !$returnstatus) {
                                    $this->prereq_alert = get_lang('LearnpathPrereqNotCompleted');
                                }

                                return $returnstatus;
                            } else {
                                // Strange...
                                if (self::debug > 1) {
                                    error_log('New LP - Found ~ but strange string: '.$prereqs_string, 0);
                                }
                            }
                        } else {
                            // Finally, look for sets/groups

                            if (self::debug > 1) {
                                error_log('New LP - Didnt find any ~, looking for groups', 0);
                            }
                            // Only groups here.
                            $groups = array();
                            $groups_there = preg_match_all('/((\d+\*)?\{([^\}]+)\}+)/', $prereqs_string, $groups);

                            if ($groups_there) {
                                foreach ($groups[1] as $gr) { // Only take the results that correspond to the big brackets-enclosed condition.
                                    if (self::debug > 1) {
                                        error_log('New LP - Dealing with group '.$gr, 0);
                                    }
                                    $multi = array();
                                    $mycond = false;
                                    if (preg_match('/(\d+)\*\{([^\}]+)\}/', $gr, $multi)) {
                                        if (self::debug > 1) {
                                            error_log('New LP - Found multiplier '.$multi[0], 0);
                                        }
                                        $count = $multi[1];
                                        $list = split(',', $multi[2]);
                                        $mytrue = 0;
                                        foreach ($list as $cond) {
                                            if (isset($items[$refs_list[$cond]])) {
                                                $status = $items[$refs_list[$cond]]->get_status(true);
                                                if (($status == $this->possible_status[2]) OR ($status == $this->possible_status[3])) {
                                                    $mytrue++;
                                                    if (self::debug > 1) {
                                                        error_log(
                                                            'New LP - Found true item, counting.. ('.($mytrue).')',
                                                            0
                                                        );
                                                    }
                                                }
                                            } else {
                                                if (self::debug > 1) {
                                                    error_log(
                                                        'New LP - item '.$cond.' does not exist in items list',
                                                        0
                                                    );
                                                }
                                            }
                                        }
                                        if ($mytrue >= $count) {
                                            if (self::debug > 1) {
                                                error_log('New LP - Got enough true results, return true', 0);
                                            }
                                            $mycond = true;
                                        } else {
                                            if (self::debug > 1) {
                                                error_log('New LP - Not enough true results', 0);
                                            }
                                        }
                                    } else {
                                        if (self::debug > 1) {
                                            error_log('New LP - No multiplier', 0);
                                        }
                                        $list = split(',', $gr);
                                        $mycond = true;
                                        foreach ($list as $cond) {
                                            if (isset($items[$refs_list[$cond]])) {
                                                $status = $items[$refs_list[$cond]]->get_status(true);
                                                if (($status == $this->possible_status[2]) OR ($status == $this->possible_status[3])) {
                                                    $mycond = true;
                                                    if (self::debug > 1) {
                                                        error_log('New LP - Found true item', 0);
                                                    }
                                                } else {
                                                    if (self::debug > 1) {
                                                        error_log(
                                                            'New LP - Found false item, the set is not true, return false',
                                                            0
                                                        );
                                                    }
                                                    $mycond = false;
                                                    break;
                                                }
                                            } else {
                                                if (self::debug > 1) {
                                                    error_log(
                                                        'New LP - item '.$cond.' does not exist in items list',
                                                        0
                                                    );
                                                }
                                                if (self::debug > 1) {
                                                    error_log(
                                                        'New LP - Found false item, the set is not true, return false',
                                                        0
                                                    );
                                                }
                                                $mycond = false;
                                                break;
                                            }
                                        }
                                    }
                                    if (!$mycond && empty($this->prereq_alert)) {
                                        $this->prereq_alert = get_lang('LearnpathPrereqNotCompleted');
                                    }

                                    return $mycond;
                                }
                            } else {

                                // Nothing found there either. Now return the value of the corresponding resource completion status.
                                if (self::debug > 1) {
                                    error_log('New LP - Didnt find any group, returning value for '.$prereqs_string, 0);
                                }

                                if (isset($items[$refs_list[$prereqs_string]])) {
                                    if ($items[$refs_list[$prereqs_string]]->type == 'quiz') {

                                        // 1. Checking the status in current items.
                                        $status = $items[$refs_list[$prereqs_string]]->get_status(true);
                                        //error_log('hello '.$status);
                                        $returnstatus = (($status == $this->possible_status[2]) OR ($status == $this->possible_status[3]));

                                        if (!$returnstatus) {
                                            if (self::debug > 1) {
                                                error_log('New LP - Prerequisite '.$prereqs_string.' not complete', 0);
                                            }
                                        } else {
                                            if (self::debug > 1) {
                                                error_log('New LP - Prerequisite '.$prereqs_string.' complete', 0);
                                            }
                                        }

                                        // For one attempt LPs.
                                        if ($this->prevent_reinit == 1) {

                                            // 2. If is completed we check the results in the DB of the quiz.
                                            if ($returnstatus) {
                                                //AND origin_lp_item_id = '.$user_id.'
                                                $sql = 'SELECT exe_result, exe_weighting
														FROM '.Database :: get_main_table(
                                                    TABLE_STATISTIC_TRACK_E_EXERCICES
                                                ).'
														WHERE 	exe_exo_id = '.$items[$refs_list[$prereqs_string]]->path.'
																AND exe_user_id = '.$user_id.'
																AND orig_lp_id = '.$this->lp_id.' AND orig_lp_item_id = '.$prereqs_string.'
																AND status <> "incomplete"
														ORDER BY exe_date DESC
														LIMIT 0, 1';
                                                //error_log('results :'.$items[$refs_list[$prereqs_string]]->path. ':'.$user_id);

                                                $rs_quiz = Database::query($sql);
                                                if ($quiz = Database :: fetch_array($rs_quiz)) {
                                                    if ($quiz['exe_result'] >= $items[$refs_list[$prereqs_string]]->get_mastery_score(
                                                    )
                                                    ) {
                                                        $returnstatus = true;
                                                    } else {
                                                        $this->prereq_alert = get_lang('LearnpathPrereqNotCompleted');
                                                        $returnstatus = false;
                                                    }
                                                } else {
                                                    $this->prereq_alert = get_lang('LearnpathPrereqNotCompleted');
                                                    $returnstatus = false;
                                                }
                                            }
                                        } else {
                                            // 3. for multiple attempts we check that there are minimun 1 item completed.
                                            // Checking in the database.
                                            $sql = 'SELECT exe_result, exe_weighting
													FROM '.Database :: get_main_table(
                                                TABLE_STATISTIC_TRACK_E_EXERCICES
                                            ).'
													WHERE	exe_exo_id = '.$items[$refs_list[$prereqs_string]]->path.'
															AND exe_user_id = '.$user_id.' AND orig_lp_id = '.$this->lp_id.' AND orig_lp_item_id = '.$prereqs_string.' ';
                                            //error_log('results 2:'.$items[$refs_list[$prereqs_string]]->path. ':'.$user_id);

                                            $rs_quiz = Database::query($sql);
                                            if (Database::num_rows($rs_quiz) > 0) {
                                                while ($quiz = Database :: fetch_array($rs_quiz)) {
                                                    if ($quiz['exe_result'] >= $items[$refs_list[$prereqs_string]]->get_mastery_score(
                                                    )
                                                    ) {
                                                        $returnstatus = true;
                                                        break;
                                                    } else {
                                                        $this->prereq_alert = get_lang('LearnpathPrereqNotCompleted');
                                                        $returnstatus = false;
                                                    }
                                                }
                                            } else {
                                                $this->prereq_alert = get_lang('LearnpathPrereqNotCompleted');
                                                $returnstatus = false;
                                            }
                                        }

                                        return $returnstatus;
                                    } else {
                                        $status = $items[$refs_list[$prereqs_string]]->get_status(false);
                                        $returnstatus = (($status == $this->possible_status[2]) OR ($status == $this->possible_status[3]));

                                        if (!$returnstatus) {
                                            if (self::debug > 1) {
                                                error_log('New LP - Prerequisite '.$prereqs_string.' not complete', 0);
                                            }
                                        } else {
                                            if (self::debug > 1) {
                                                error_log('New LP - Prerequisite '.$prereqs_string.' complete', 0);
                                            }
                                        }

                                        //$returnstatus = true;
                                        if ($returnstatus && $this->prevent_reinit == 1) {
                                            // I would prefer check in the database.
                                            $lp_item_view = Database::get_course_table(TABLE_LP_ITEM_VIEW);
                                            $lp_view = Database::get_course_table(TABLE_LP_VIEW);

                                            $sql = 'SELECT id FROM '.$lp_view.'
													WHERE c_id = '.$course_id.' AND user_id = '.$user_id.'  AND lp_id = '.$this->lp_id.' LIMIT 0, 1';
                                            $rs_lp = Database::query($sql);
                                            $lp_id = Database :: fetch_row($rs_lp);
                                            $my_lp_id = $lp_id[0];

                                            $sql = 'SELECT status FROM '.$lp_item_view.'
													WHERE c_id = '.$course_id.' AND lp_view_id = '.$my_lp_id.' AND lp_item_id = '.$refs_list[$prereqs_string].' LIMIT 0, 1';
                                            $rs_lp = Database::query($sql);
                                            $status_array = Database :: fetch_row($rs_lp);
                                            $status = $status_array[0];

                                            $returnstatus = (($status == $this->possible_status[2]) OR ($status == $this->possible_status[3]));
                                            if (!$returnstatus && empty($this->prereq_alert)) {
                                                $this->prereq_alert = get_lang('LearnpathPrereqNotCompleted');
                                            }
                                            if (!$returnstatus) {
                                                if (self::debug > 1) {
                                                    error_log(
                                                        'New LP - Prerequisite '.$prereqs_string.' not complete',
                                                        0
                                                    );
                                                }
                                            } else {
                                                if (self::debug > 1) {
                                                    error_log('New LP - Prerequisite '.$prereqs_string.' complete', 0);
                                                }
                                            }
                                        }

                                        return $returnstatus;
                                    }
                                } else {
                                    if (self::debug > 1) {
                                        error_log(
                                            'New LP - Could not find '.$prereqs_string.' in '.print_r($refs_list, true),
                                            0
                                        );
                                    }
                                }
                            }
                        }
                    }
                }
            }
        } else {
            $list = split("\|", $prereqs_string);
            if (count($list) > 1) {
                if (self::debug > 1) {
                    error_log('New LP - Found OR, looking into it', 0);
                }
                $orstatus = false;
                foreach ($list as $condition) {
                    if (self::debug > 1) {
                        error_log('New LP - Found OR, adding it ('.$condition.')', 0);
                    }
                    $orstatus = $orstatus || $this->parse_prereq($condition, $items, $refs_list, $user_id);
                    if ($orstatus) {
                        // Shortcircuit OR.
                        if (self::debug > 1) {
                            error_log('New LP - One condition in OR was true, short-circuit', 0);
                        }
                        break;
                    }
                }
                if (!$orstatus && empty($this->prereq_alert)) {
                    $this->prereq_alert = get_lang('LearnpathPrereqNotCompleted');
                }

                return $orstatus;
            } else {
                if (self::debug > 1) {
                    error_log('New LP - OR was found but only one elem present !?', 0);
                }
                if (isset($items[$refs_list[$list[0]]])) {
                    $status = $items[$refs_list[$list[0]]]->get_status(true);
                    $returnstatus = (($status == 'completed') OR ($status == 'passed'));
                    if (!$returnstatus && empty($this->prereq_alert)) {
                        $this->prereq_alert = get_lang('LearnpathPrereqNotCompleted');
                    }

                    return $returnstatus;
                }
            }
        }
        if (empty($this->prereq_alert)) {
            $this->prereq_alert = get_lang('LearnpathPrereqNotCompleted');
        }
        if (self::debug > 1) {
            error_log('New LP - End of parse_prereq. Error code is now '.$this->prereq_alert, 0);
        }

        return false;
    }

    /**
     * Reinits all local values as the learnpath is restarted
     * @return    boolean    True on success, false otherwise
     */
    public function restart()
    {
        if (self::debug > 0) {
            error_log('learnpathItem::restart()', 0);
        }
        if ($this->type == 'sco') { //If this is a sco, chamilo can't update the time without explicit scorm call
            $this->current_start_time = 0;
            $this->current_stop_time = 0; //Those 0 value have this effect
            $this->last_scorm_session_time = 0;
        }
        $this->save();

        //For serious game  : We reuse same attempt_id
        if ($this->get_seriousgame_mode() == 1 && $this->type == 'sco') {
            $this->current_start_time = 0;
            $this->current_stop_time = 0;

            return true;
        }
        $allowed = $this->is_restart_allowed();
        if ($allowed === -1) {
            // Nothing allowed, do nothing.
        } elseif ($allowed === 1) {
            // Restart as new attempt is allowed, record a new attempt.
            $this->attempt_id = $this->attempt_id + 1; // Simply reuse the previous attempt_id.
            $this->current_score = 0;
            $this->current_start_time = 0;
            $this->current_stop_time = 0;
            $this->current_data = '';
            $this->status = $this->possible_status[0];
            $this->interactions_count = 0;
            $this->interactions = array();
            $this->objectives_count = 0;
            $this->objectives = array();
            $this->lesson_location = '';
            if ($this->type != TOOL_QUIZ) {
                $this->write_to_db();
            }
        } else {
            // Restart current element is allowed (because it's not finished yet),
            // reinit current.
            //$this->current_score = 0;
            $this->current_start_time = 0;
            $this->current_stop_time = 0;
            //$this->current_data = '';
            //$this->status = $this->possible_status[0];
            $this->interactions_count = $this->get_interactions_count(true);
            if ($this->type == 'sco') {
                $this->scorm_init_time();
            }
        }

        return true;
    }

    /**
     * Saves data in the database
     * @param    boolean    Save from URL params (1) or from object attributes (0)
     * @param    boolean    The results of a check on prerequisites for this item. True if prerequisites are completed, false otherwise. Defaults to false. Only used if not sco or au
     * @return    boolean    True on success, false on failure
     */
    public function save($from_outside = true, $prereqs_complete = false)
    {
        if (self::debug > 0) {
            error_log('learnpathItem::save()', 0);
        }
        // First check if parameters passed via GET can be saved here
        // in case it's a SCORM, we should get:
        if ($this->type == 'sco' || $this->type == 'au') {
            $status = $this->get_status(true);
            if ($this->prevent_reinit == 1 AND
                $status != $this->possible_status[0] AND $status != $this->possible_status[1]
            ) {
                if (self::debug > 1) {
                    error_log('learnpathItem::save() - save reinit blocked by setting', 0);
                }
                // Do nothing because the status has already been set. Don't allow it to change.
                // TODO: Check there isn't a special circumstance where this should be saved.
            } else {
                if (self::debug > 1) {
                    error_log('learnpathItem::save() - SCORM save request received', 0);
                }
                //get all new settings from the URL
                if ($from_outside) {
                    if (self::debug > 1) {
                        error_log('learnpathItem::save() - Getting item data from outside', 0);
                    }
                    foreach ($_GET as $param => $value) {
                        $value = Database::escape_string($value);
                        switch ($param) {
                            case 'score':
                                $this->set_score($value);
                                if (self::debug > 2) {
                                    error_log('learnpathItem::save() - setting score to '.$value, 0);
                                }
                                break;
                            case 'max':
                                $this->set_max_score($value);
                                if (self::debug > 2) {
                                    error_log('learnpathItem::save() - setting view_max_score to '.$value, 0);
                                }
                                break;
                            case 'min':
                                $this->min_score = $value;
                                if (self::debug > 2) {
                                    error_log('learnpathItem::save() - setting min_score to '.$value, 0);
                                }
                                break;
                            case 'lesson_status':
                                if (!empty($value)) {
                                    $this->set_status($value);
                                    if (self::debug > 2) {
                                        error_log('learnpathItem::save() - setting status to '.$value, 0);
                                    }
                                }
                                break;
                            case 'time':
                                $this->set_time($value);
                                if (self::debug > 2) {
                                    error_log('learnpathItem::save() - setting time to '.$value, 0);
                                }
                                break;
                            case 'suspend_data':
                                $this->current_data = $value;
                                if (self::debug > 2) {
                                    error_log('learnpathItem::save() - setting suspend_data to '.$value, 0);
                                }
                                break;
                            case 'lesson_location':
                                $this->set_lesson_location($value);
                                if (self::debug > 2) {
                                    error_log('learnpathItem::save() - setting lesson_location to '.$value, 0);
                                }
                                break;
                            case 'core_exit':
                                $this->set_core_exit($value);
                                if (self::debug > 2) {
                                    error_log('learnpathItem::save() - setting core_exit to '.$value, 0);
                                }
                                break;
                            case 'interactions':
                                //$interactions = unserialize($value);
                                //foreach($interactions as $interaction){
                                //	;
                                //}
                                break;
                            case 'objectives':
                                break;
                            //case 'maxtimeallowed':
                            //$this->set_max_time_allowed($value);
                            //break;
                            /*
                              case 'objectives._count':
                              $this->attempt_id = $value;
                              break;
                             */
                            default:
                                // Ignore.
                                break;
                        }
                    }
                } else {
                    if (self::debug > 1) {
                        error_log('learnpathItem::save() - Using inside item status', 0);
                    }
                    // Do nothing, just let the local attributes be used.
                }
            }
        } else { // If not SCO, such messages should not be expected.
            $type = strtolower($this->type);
            switch ($type) {
                case 'asset':
                    if ($prereqs_complete) {
                        $this->set_status($this->possible_status[2]);
                    }
                    break;
                case TOOL_HOTPOTATOES:
                    break;
                case TOOL_QUIZ:
                    return false;
                    break;
                default:
                    // For now, everything that is not sco and not asset is set to
                    // completed when saved.
                    if ($prereqs_complete) {
                        $this->set_status($this->possible_status[2]);
                    }
                    break;
            }
        }
        //$time = $this->time
        if (self::debug > 1) {
            error_log('New LP - End of learnpathItem::save() - Calling write_to_db()', 0);
        }

        return $this->write_to_db();
    }

    /**
     * Sets the number of attempt_id to a given value
     * @param    integer    The given value to set attempt_id to
     * @return    boolean    TRUE on success, FALSE otherwise
     */
    public function set_attempt_id($num)
    {
        if (self::debug > 0) {
            error_log('learnpathItem::set_attempt_id()', 0);
        }
        if ($num == strval(intval($num)) && $num >= 0) {
            $this->attempt_id = $num;

            return true;
        }

        return false;
    }

    /**
     * Sets the core_exit value to the one given
     * @return  bool    True (always)
     */
    public function set_core_exit($value)
    {
        switch ($value) {
            case '':
                $this->core_exit = '';
                break;
            case 'suspend':
                $this->core_exit = 'suspend';
                break;
            default:
                $this->core_exit = 'none';
                break;
        }
        return true;
    }

    /**
     * Sets the item's description
     * @param    string    Description
     * @return  void
     */
    public function set_description($string = '')
    {
        if (self::debug > 0) {
            error_log('learnpathItem::set_description()', 0);
        }
        if (!empty($string)) {
            $this->description = $string;
        }
    }

    /**
     * Sets the lesson_location value
     * @param    string    lesson_location as provided by the SCO
     * @return    boolean    True on success, false otherwise
     */
    public function set_lesson_location($location)
    {
        if (self::debug > 0) {
            error_log('learnpathItem::set_lesson_location()', 0);
        }
        if (isset($location)) {
            $this->lesson_location = Database::escape_string($location);

            return true;
        }

        return false;
    }

    /**
     * Sets the item's depth level in the LP tree (0 is at root)
     * @param    integer    Level
     * @return  void
     */
    public function set_level($int = 0)
    {
        if (self::debug > 0) {
            error_log('learnpathItem::set_level('.$int.')', 0);
        }
        if (!empty($int) AND $int == strval(intval($int))) {
            $this->level = $int;
        }
    }

    /**
     * Sets the lp_view id this item view is registered to
     * @param    integer    lp_view DB ID
     * @return  void
     * @todo //todo insert into lp_item_view if lp_view not exists
     */
    public function set_lp_view($lp_view_id, $course_id = null)
    {
        if (empty($course_id)) {
            $course_id = api_get_course_int_id();
        } else {
            $course_id = intval($course_id);
        }
        if (self::debug > 0) {
            error_log('learnpathItem::set_lp_view('.$lp_view_id.')', 0);
        }
        if (!empty($lp_view_id) and $lp_view_id = intval(strval($lp_view_id))) {
            $this->view_id = $lp_view_id;

            $item_view_table = Database::get_course_table(TABLE_LP_ITEM_VIEW);
            // Get the lp_item_view with the highest view_count.
            $sql = "SELECT * FROM $item_view_table
                    WHERE   c_id = $course_id AND
                            lp_item_id = ".$this->get_id()." AND
                            lp_view_id = ".$lp_view_id."
                    ORDER BY view_count DESC";

            if (self::debug > 2) {
                error_log('learnpathItem::set_lp_view() - Querying lp_item_view: '.$sql, 0);
            }
            $res = Database::query($sql);
            if (Database::num_rows($res) > 0) {
                $row = Database::fetch_array($res);
                $this->db_item_view_id = $row['id'];
                $this->attempt_id = $row['view_count'];
                $this->current_score = $row['score'];
                $this->current_data = $row['suspend_data'];
                $this->view_max_score = $row['max_score'];
                $this->status = $row['status'];
                $this->current_start_time = $row['start_time'];
                $this->current_stop_time = $this->current_start_time + $row['total_time'];
                $this->lesson_location = $row['lesson_location'];
                $this->core_exit = $row['core_exit'];
                if (self::debug > 2) {
                    error_log('learnpathItem::set_lp_view() - Updated item object with database values', 0);
                }

                // Now get the number of interactions for this little guy.
                $item_view_interaction_table = Database::get_course_table(TABLE_LP_IV_INTERACTION);
                $sql = "SELECT * FROM $item_view_interaction_table WHERE c_id = $course_id AND lp_iv_id = '".$this->db_item_view_id."'";
                //error_log('sql10->'.$sql);
                $res = Database::query($sql);
                if ($res !== false) {
                    $this->interactions_count = Database::num_rows($res);
                } else {
                    $this->interactions_count = 0;
                }
                // Now get the number of objectives for this little guy.
                $item_view_objective_table = Database::get_course_table(TABLE_LP_IV_OBJECTIVE);
                $sql = "SELECT * FROM $item_view_objective_table WHERE c_id = $course_id AND lp_iv_id = '".$this->db_item_view_id."'";
                //error_log('sql11->'.$sql);
                $res = Database::query($sql);
                if ($res !== false) {
                    $this->objectives_count = Database::num_rows($res);
                } else {
                    $this->objectives_count = 0;
                }
            }
        }
        // End
        if (self::debug > 2) {
            error_log('New LP - End of learnpathItem::set_lp_view()', 0);
        }
    }

    /**
     * Sets the path
     * @param    string    Path
     * @return  void
     */
    public function set_path($string = '')
    {
        if (self::debug > 0) {
            error_log('learnpathItem::set_path()', 0);
        }
        if (!empty($string)) {
            $this->path = $string;
        }
    }

    /**
     * Sets the prevent_reinit attribute. This is based on the LP value and is set at creation time for
     * each learnpathItem. It is a (bad?) way of avoiding a reference to the LP when saving an item.
     * @param    integer    1 for "prevent", 0 for "don't prevent" saving freshened values (new "not attempted" status etc)
     * @return  void
     */
    public function set_prevent_reinit($prevent)
    {
        if (self::debug > 0) {
            error_log('learnpathItem::set_prevent_reinit()', 0);
        }
        if ($prevent) {
            $this->prevent_reinit = 1;
        } else {
            $this->prevent_reinit = 0;
        }
    }

    /**
     * Sets the score value. If the mastery_score is set and the score reaches
     * it, then set the status to 'passed'.
     * @param    float    Score
     * @return    boolean    True on success, false otherwise
     */
    public function set_score($score)
    {
        //$possible_status = array('not attempted','incomplete','completed','passed','failed','browsed');
        $debug = self::debug;
        if ($debug > 0) {
            error_log('learnpathItem::set_score('.$score.')', 0);
        }
        if (($this->max_score <= 0 || $score <= $this->max_score) && ($score >= $this->min_score)) {
            $this->current_score = $score;
            $master = $this->get_mastery_score();
            $current_status = $this->get_status(false);

            //Fixes bug when SCORM doesn't send a mastery score even if they sent a score!
            if ($master == -1) {
                $master = $this->max_score;
            }

            if ($debug > 0) {
                error_log('get_mastery_score: '.$master);
                error_log('current_status: '.$current_status);
                error_log('current score : '.$this->current_score);
            }

            // If mastery_score is set AND the current score reaches the mastery score AND the current status is different from 'completed', then set it to 'passed'.
            /*
              if ($master != -1 && $this->current_score >= $master && $current_status != $this->possible_status[2]) {
              if ($debug > 0) error_log('Status changed to: '.$this->possible_status[3]);
              $this->set_status($this->possible_status[3]); //passed
              } elseif ($master != -1 && $this->current_score < $master) {
              if ($debug > 0) error_log('Status changed to: '.$this->possible_status[4]);
              $this->set_status($this->possible_status[4]); //failed
              } */

            return true;
        }

        return false;
    }

    /**
     * Sets the maximum score for this item
     * @param    int        Maximum score - must be a decimal or an empty string
     * @return    boolean    True on success, false on error
     */
    public function set_max_score($score)
    {
        if (self::debug > 0) {
            error_log('learnpathItem::set_max_score('.$score.')', 0);
        }
        if (is_int($score) or $score == '') {
            $this->view_max_score = Database::escape_string($score);
            if (self::debug > 1) {
                error_log(
                    'learnpathItem::set_max_score() - Updated object score of item '.$this->db_id.' to '.$this->view_max_score,
                    0
                );
            }

            return true;
        }

        return false;
    }

    /**
     * Sets the status for this item
     * @param    string    Status - must be one of the values defined in $this->possible_status
     * @return    boolean    True on success, false on error
     */
    public function set_status($status)
    {
        if (self::debug > 0) {
            error_log('learnpathItem::set_status('.$status.')', 0);
        }
        $found = false;
        foreach ($this->possible_status as $possible) {
            if (preg_match('/^'.$possible.'$/i', $status)) {
                $found = true;
            }
        }
        //if (in_array($status, $this->possible_status)) {
        if ($found) {
            $this->status = Database::escape_string($status);
            if (self::debug > 1) {
                error_log(
                    'learnpathItem::set_status() - Updated object status of item '.$this->db_id.' to '.$this->status,
                    0
                );
            }

            return true;
        }
        //error_log('New LP - '.$status.' was not in the possible status', 0);
        $this->status = $this->possible_status[0];

        return false;
    }

    /**
     * Set the terms for this learnpath item
     * @param   string  Terms, as a comma-split list
     * @return  boolean Always return true
     */
    public function set_terms($terms)
    {
        global $charset;
        $course_id = api_get_course_int_id();
        $lp_item = Database::get_course_table(TABLE_LP_ITEM);
        require_once api_get_path(LIBRARY_PATH).'search/ChamiloIndexer.class.php';
        $a_terms = split(',', $terms);
        $i_terms = split(',', $this->get_terms());
        foreach ($i_terms as $term) {
            if (!in_array($term, $a_terms)) {
                array_push($a_terms, $term);
            }
        }
        $new_terms = $a_terms;
        $new_terms_string = implode(',', $new_terms);
        $terms_update_sql = '';
        // TODO: Validate csv string.
        $terms_update_sql = "UPDATE $lp_item SET terms = '".Database::escape_string(
            api_htmlentities($new_terms_string, ENT_QUOTES, $charset)
        )."'
		                      WHERE c_id = $course_id AND id=".$this->get_id();
        $res = Database::query($terms_update_sql);
        // Save it to search engine.
        if (api_get_setting('search_enabled') == 'true') {
            $di = new ChamiloIndexer();
            $di->update_terms($this->get_search_did(), $new_terms);
        }

        return true;
    }

    /**
     * Get the document ID from inside the text index database
     * @return  int     Search index database document ID
     */
    public function get_search_did()
    {
        return $this->search_did;
    }

    /**
     * Sets the item viewing time in a usable form, given that SCORM packages often give it as 00:00:00.0000
     * @param    string    Time as given by SCORM
     * @return  void
     */
    public function set_time($scorm_time, $format = 'scorm')
    {
        if (self::debug > 0) {
            error_log('learnpathItem::set_time('.$scorm_time.')', 0);
        }
        if ($scorm_time == 0 and ($this->type != 'sco') and $this->current_start_time != 0) {
            $my_time = time() - $this->current_start_time;
            if ($my_time > 0) {
                $this->update_time($my_time);
                if (self::debug > 0) {
                    error_log('learnpathItem::set_time('.$scorm_time.') - found asset - set time to '.$my_time, 0);
                }
            }
        } else {
            switch ($format) {
                case 'scorm':
                    $res = array();
                    if (preg_match('/^(\d{1,4}):(\d{2}):(\d{2})(\.\d{1,4})?/', $scorm_time, $res)) {
                        $time = time();
                        $hour = $res[1];
                        $min = $res[2];
                        $sec = $res[3];
                        // Getting total number of seconds spent.
                        $total_sec = $hour * 3600 + $min * 60 + $sec;
                        $this->scorm_update_time($total_sec);
                    }
                    break;
                case 'int':
                    $this->scorm_update_time($scorm_time);
                    break;
            }
        }
    }

    /**
     * Sets the item's title
     * @param    string    Title
     * @return  void
     */
    public function set_title($string = '')
    {
        if (self::debug > 0) {
            error_log('learnpathItem::set_title()', 0);
        }
        if (!empty($string)) {
            $this->title = $string;
        }
    }

    /**
     * Sets the item's type
     * @param    string    Type
     * @return  void
     */
    public function set_type($string = '')
    {
        if (self::debug > 0) {
            error_log('learnpathItem::set_type()', 0);
        }
        if (!empty($string)) {
            $this->type = $string;
        }
    }

    /**
     * Checks if the current status is part of the list of status given
     * @param    strings_array    An array of status to check for. If the current status is one of the strings, return true
     * @return    boolean            True if the status was one of the given strings, false otherwise
     */
    public function status_is($list = array())
    {
        if (self::debug > 1) {
            error_log('learnpathItem::status_is('.print_r($list, true).') on item '.$this->db_id, 0);
        }
        $mystatus = $this->get_status(true);
        if (empty($mystatus)) {
            return false;
        }
        $found = false;
        foreach ($list as $status) {
            if (preg_match('/^'.$status.'$/i', $mystatus)) {
                if (self::debug > 2) {
                    error_log(
                        'New LP - learnpathItem::status_is() - Found status '.$status.' corresponding to current status',
                        0
                    );
                }
                $found = true;

                return $found;
            }
        }
        if (self::debug > 2) {
            error_log('New LP - learnpathItem::status_is() - Status '.$mystatus.' did not match request', 0);
        }

        return $found;
    }

    /**
     * Updates the time info according to the given session_time
     * @param    integer    Time in seconds
     * @return  void
     * TODO: Make this method better by allowing better/multiple time slices.
     */
    public function update_time($total_sec = 0)
    {
        if (self::debug > 0) {
            error_log('learnpathItem::update_time('.$total_sec.')', 0);
        }
        if ($total_sec >= 0) {
            // Getting start time from finish time. The only problem in the calculation is it might be
            // modified by the scripts processing time.
            $now = time();
            $start = $now - $total_sec;
            $this->current_start_time = $start;
            $this->current_stop_time = $now;
            /* if (empty($this->current_start_time)) {
              $this->current_start_time = $start;
              $this->current_stop_time  = $now;
              } else {
              //if ($this->current_stop_time != $this->current_start_time) {
              // If the stop time has already been set before to something else
              // than the start time, add the given time to what's already been
              // recorder.
              // This is the SCORM way of doing things, because the time comes from
              // core.session_time, not core.total_time
              // UPDATE: adding time to previous time is only done on SCORM's finish()
              // call, not normally, so for now ignore this section.
              //$this->current_stop_time = $this->current_stop_time + $stop;
              //error_log('New LP - Adding '.$stop.' seconds - now '.$this->current_stop_time, 0);
              //} else {
              // If no previous stop time set, use the one just calculated now from
              // start time.
              //$this->current_start_time = $start;
              //$this->current_stop_time  = $now;
              //error_log('New LP - Setting '.$stop.' seconds - now '.$this->current_stop_time, 0);
              //}
              } */
        }
    }

    /**
     * Special scorm update time function. This function will update time directly into db for scorm objects
     * */
    public function scorm_update_time($total_sec = 0)
    {
        if (self::debug > 0) {
            error_log('Funcion called: scorm_update_time');
        }
        if (self::debug > 0) {
            error_log("total_sec: $total_sec");
        }

        //Step 1 : get actual total time stored in db
        $item_view_table = Database::get_course_table(TABLE_LP_ITEM_VIEW);
        $course_id = api_get_course_int_id();

        $get_view_sql = 'SELECT total_time, status FROM '.$item_view_table.'
                         WHERE c_id = '.$course_id.' AND lp_item_id="'.$this->db_id.'" AND lp_view_id="'.$this->view_id.'" AND view_count="'.$this->attempt_id.'" ;';
        $result = Database::query($get_view_sql);
        $row = Database::fetch_array($result);

        if (!isset($row['total_time'])) {
            $total_time = 0;
        } else {
            $total_time = $row['total_time'];
        }
        if (self::debug > 0) {
            error_log("total_time: $total_time");
        }

        //Step 2.1 : if normal mode total_time = total_time + total_sec
        if (api_get_setting('scorm_cumulative_session_time') != 'false') {
            $total_time += $total_sec;
            //$this->last_scorm_session_time = $total_sec;
        } else {
            //Step 2.2 : if not cumulative mode total_time = total_time - last_update + total_sec
            $total_time = $total_time - $this->last_scorm_session_time + $total_sec;
            $this->last_scorm_session_time = $total_sec;
        }
        //Step 3 update db only if status != completed, passed, browsed or seriousgamemode not activated
        $case_completed = array('completed', 'passed', 'browsed', 'failed'); //TODO COMPLETE
        if ($this->seriousgame_mode != 1 || !in_array($row['status'], $case_completed)) {
            $update_view_sql = "UPDATE $item_view_table SET total_time = '$total_time'
                               WHERE c_id = $course_id AND lp_item_id = {$this->db_id} AND lp_view_id = {$this->view_id} AND view_count = {$this->attempt_id}";
            if (self::debug > 0) {
                error_log($update_view_sql);
            }
            $result = Database::query($update_view_sql);
        }
    }

    /**
     * Set the total_time to 0 into db
     * */
    public function scorm_init_time()
    {
        $item_view_table = Database::get_course_table(TABLE_LP_ITEM_VIEW);
        $course_id = api_get_course_int_id();
        $update_view_sql = 'UPDATE '.$item_view_table.' SET total_time = 0, start_time='.time().'
                        WHERE c_id = '.$course_id.' AND lp_item_id="'.$this->db_id.'" AND lp_view_id="'.$this->view_id.'" AND view_count="'.$this->attempt_id.'" ;';
        Database::query($update_view_sql);
    }

    /**
     * Write objectives to DB. This method is separate from write_to_db() because otherwise
     * objectives are lost as a side effect to AJAX and session concurrent access
     * @return    boolean        True or false on error
     */
    public function write_objectives_to_db()
    {
        if (self::debug > 0) {
            error_log('learnpathItem::write_objectives_to_db()', 0);
        }
        $course_id = api_get_course_int_id();
        if (is_array($this->objectives) && count($this->objectives) > 0) {
            // Save objectives.
            $tbl = Database::get_course_table(TABLE_LP_ITEM_VIEW);
            $sql = "SELECT id FROM $tbl ".
                "WHERE c_id = $course_id AND lp_item_id = ".$this->db_id." ".
                "AND   lp_view_id = ".$this->view_id." ".
                "AND   view_count = ".$this->attempt_id;
            $res = Database::query($sql);
            if (Database::num_rows($res) > 0) {
                $row = Database::fetch_array($res);
                $lp_iv_id = $row[0];
                if (self::debug > 2) {
                    error_log(
                        'learnpathItem::write_to_db() - Got item_view_id '.$lp_iv_id.', now checking objectives ',
                        0
                    );
                }
                foreach ($this->objectives as $index => $objective) {
                    $iva_table = Database::get_course_table(TABLE_LP_IV_OBJECTIVE);
                    $iva_sql = "SELECT id FROM $iva_table ".
                        "WHERE c_id = $course_id AND lp_iv_id = $lp_iv_id ".
                        //"AND order_id = $index";
                        //also check for the objective ID as it must be unique for this SCO view
                        "AND objective_id = '".Database::escape_string($objective[0])."'";
                    $iva_res = Database::query($iva_sql);
                    // id(0), type(1), time(2), weighting(3), correct_responses(4), student_response(5), result(6), latency(7)
                    if (Database::num_rows($iva_res) > 0) {
                        // Update (or don't).
                        $iva_row = Database::fetch_array($iva_res);
                        $iva_id = $iva_row[0];
                        $ivau_sql = "UPDATE $iva_table ".
                            "SET objective_id = '".Database::escape_string($objective[0])."',".
                            "status = '".Database::escape_string($objective[1])."',".
                            "score_raw = '".Database::escape_string($objective[2])."',".
                            "score_min = '".Database::escape_string($objective[4])."',".
                            "score_max = '".Database::escape_string($objective[3])."' ".
                            "WHERE c_id = $course_id AND id = $iva_id";
                        $ivau_res = Database::query($ivau_sql);
                        //error_log($ivau_sql, 0);
                    } else {
                        // Insert new one.
                        $ivai_sql = "INSERT INTO $iva_table ".
                            "(c_id, lp_iv_id, order_id, objective_id, status, score_raw, score_min, score_max )".
                            "VALUES".
                            "($course_id, ".$lp_iv_id.", ".$index.",'".Database::escape_string(
                            $objective[0]
                        )."','".Database::escape_string($objective[1])."',".
                            "'".Database::escape_string($objective[2])."','".Database::escape_string(
                            $objective[4]
                        )."','".Database::escape_string($objective[3])."')";
                        $ivai_res = Database::query($ivai_sql);
                        //error_log($ivai_sql);
                    }
                }
            }
        } else {
            //error_log('no objective to save: '.print_r($this->objectives, 1));
        }
    }

    function get_check_attempts($item_id)
    {
        $count = $this->items[$item_id]->get_view_count();
        $max_attempts = $this->get_max_attempts();
        switch ($max_attempts) {
            case 0: //unlimited
                return true;
                break;
            case $max_attempts >= 1:
                if ($count < $max_attempts) {
                    return true;
                }
                break;
        }

        return false;
    }

    function check_attempts($attempt)
    {
        $course_id = api_get_course_int_id();
        $table = Database::get_course_table(TABLE_LP_MAIN);
        $sql = "SELECT max_attempts FROM $table WHERE id = $this->lp_id AND c_id = $course_id";
        $result = Database::query($sql);

        $max_attempt = 1;
        if (Database::num_rows($result)) {
            $row = Database::fetch_array($result, 'ASSOC');
            $max_attempt = $row['max_attempts'];
        }

        switch ($max_attempt) {
            case 0: //unlimited
                return true;
                break;
            case $max_attempt >= 1:
                if ($attempt <= $max_attempt) {
                    return true;
                }
                break;
        }

        return false;
    }


    /**
     * Writes the current data to the database
     * @return    boolean    Query result
     */
    public function write_to_db()
    {
        if (self::debug > 0) {
            error_log('learnpathItem::write_to_db()', 0);
        }

        // Check the session visibility.
        if (!api_is_allowed_to_session_edit()) {
            if (self::debug > 0) {
                error_log('return false api_is_allowed_to_session_edit');
            }

            return false;
        }
        $course_id = api_get_course_int_id();
        $mode = $this->get_lesson_mode();
        $credit = $this->get_credit();

        $item_view_table = Database::get_course_table(TABLE_LP_ITEM_VIEW);
        $sql_verified = 'SELECT status FROM '.$item_view_table.'
		                 WHERE c_id = '.$course_id.' AND lp_item_id="'.$this->db_id.'" AND lp_view_id="'.$this->view_id.'" AND view_count="'.$this->get_attempt_id(
        ).'" ;';
        $rs_verified = Database::query($sql_verified);
        $row_verified = Database::fetch_array($rs_verified);
        $my_case_completed = array('completed', 'passed', 'browsed', 'failed');

        $save = true;

        if (isset($row_verified) && isset($row_verified['status'])) {
            if (in_array($row_verified['status'], $my_case_completed)) {
                $save = false;
            }
        }

        if ((($save === false && $this->type == 'sco') ||
            ($this->type == 'sco' && ($credit == 'no-credit' OR $mode == 'review' OR $mode == 'browse'))
        ) && ($this->seriousgame_mode != 1 && $this->type == 'sco')
        ) {
            if (self::debug > 1) {
                error_log("This info shouldn't be saved as the credit or lesson mode info prevent it");
                error_log(
                    'learnpathItem::write_to_db() - credit('.$credit.') or lesson_mode('.$mode.') prevent recording!',
                    0
                );
            }
        } else {
            // Check the row exists.
            $inserted = false;

            // This a special case for multiple attempts and Chamilo exercises.
            if ($this->type == 'quiz' && $this->get_prevent_reinit() == 0 && $this->get_status() == 'completed') {
                // We force the item to be restarted.
                $this->restart();

                $sql = "INSERT INTO $item_view_table ".
                    "(c_id, total_time, ".
                    "start_time, ".
                    "score, ".
                    "status, ".
                    "max_score, ".
                    "lp_item_id, ".
                    "lp_view_id, ".
                    "view_count, ".
                    "suspend_data, ".
                    //"max_time_allowed," .
                    "lesson_location)".
                    "VALUES".
                    "($course_id, ".$this->get_total_time().",".
                    "".$this->current_start_time.",".
                    "".$this->get_score().",".
                    "'".$this->get_status(false)."',".
                    "'".$this->get_max()."',".
                    "".$this->db_id.",".
                    "".$this->view_id.",".
                    "".$this->get_attempt_id().",".
                    "'".Database::escape_string($this->current_data)."',".
                    //"'".$this->get_max_time_allowed()."'," .
                    "'".$this->lesson_location."')";
                if (self::debug > 2) {
                    error_log('learnpathItem::write_to_db() - Inserting into item_view forced: '.$sql, 0);
                }
                $res = Database::query($sql);
                $this->db_item_view_id = Database::insert_id();
                $inserted = true;
            }

            $check_attempts = self::check_attempts($this->get_attempt_id());
            if (!$check_attempts) {
                return false;
            }

            $item_view_table = Database::get_course_table(TABLE_LP_ITEM_VIEW);
            $check = "SELECT * FROM $item_view_table
                        WHERE
                            c_id = $course_id AND
                            lp_item_id = ".$this->db_id." AND
                            lp_view_id = ".$this->view_id." AND
                            view_count = ".$this->get_attempt_id();
            if (self::debug > 2) {
                error_log('learnpathItem::write_to_db() - Querying item_view: '.$check, 0);
            }
            $check_res = Database::query($check);
            // Depending on what we want (really), we'll update or insert a new row
            // now save into DB.
            $res = 0;
            if (!$inserted && Database::num_rows($check_res) < 1) {
                $sql = "INSERT INTO $item_view_table ".
                    "(c_id, total_time, ".
                    "start_time, ".
                    "score, ".
                    "status, ".
                    "max_score, ".
                    "lp_item_id, ".
                    "lp_view_id, ".
                    "view_count, ".
                    "suspend_data, ".
                    //"max_time_allowed," .
                    "lesson_location)".
                    "VALUES".
                    "($course_id, ".$this->get_total_time().",".
                    "".$this->current_start_time.",".
                    "".$this->get_score().",".
                    "'".$this->get_status(false)."',".
                    "'".$this->get_max()."',".
                    "".$this->db_id.",".
                    "".$this->view_id.",".
                    "".$this->get_attempt_id().",".
                    "'".Database::escape_string($this->current_data)."',".
                    //"'".$this->get_max_time_allowed()."'," .
                    "'".$this->lesson_location."')";
                if (self::debug > 2) {
                    error_log('learnpathItem::write_to_db() - Inserting into item_view: '.$sql, 0);
                }
                $res = Database::query($sql);
                $this->db_item_view_id = Database::insert_id();
            } else {
                $sql = '';
                if ($this->type == 'hotpotatoes') {
                    $sql = "UPDATE $item_view_table ".
                        "SET total_time = ".$this->get_total_time().", ".
                        " start_time = ".$this->get_current_start_time().", ".
                        " score = ".$this->get_score().", ".
                        " status = '".$this->get_status(false)."',".
                        " max_score = '".$this->get_max()."',".
                        " suspend_data = '".Database::escape_string($this->current_data)."',".
                        " lesson_location = '".$this->lesson_location."' ".
                        "WHERE c_id = $course_id AND lp_item_id = ".$this->db_id." ".
                        "AND lp_view_id = ".$this->view_id." ".
                        "AND view_count = ".$this->get_attempt_id();
                } else {
                    // For all other content types...
                    if ($this->type == 'quiz') {
                        $my_status = ' ';
                        $total_time = ' ';
                        if (!empty($_REQUEST['exeId'])) {
                            $TBL_TRACK_EXERCICES = Database::get_main_table(TABLE_STATISTIC_TRACK_E_EXERCICES);

                            $safe_exe_id = Database::escape_string($_REQUEST['exeId']);
                            $sql = 'SELECT start_date,exe_date FROM '.$TBL_TRACK_EXERCICES.' WHERE exe_id = '.(int)$safe_exe_id;
                            $res = Database::query($sql);
                            $row_dates = Database::fetch_array($res);

                            $time_start_date = api_convert_sql_date($row_dates['start_date']);
                            $time_exe_date = api_convert_sql_date($row_dates['exe_date']);
                            $mytime = ((int)$time_exe_date - (int)$time_start_date);
                            $total_time = " total_time = ".$mytime.", ";
                        }
                    } else {
                        $my_type_lp = learnpath::get_type_static($this->lp_id);
                        // This is a array containing values finished
                        $case_completed = array('completed', 'passed', 'browsed', 'failed');

                        //is not multiple attempts
                        if ($this->seriousgame_mode == 1 && $this->type == 'sco') {
                            $total_time = " total_time = total_time +".$this->get_total_time().", ";
                            $my_status = " status = '".$this->get_status(false)."' ,";
                        } elseif ($this->get_prevent_reinit() == 1) {
                            // Process of status verified into data base.
                            $sql_verified = 'SELECT status FROM '.$item_view_table.'
                                             WHERE c_id = '.$course_id.' AND lp_item_id = "'.$this->db_id.'" AND lp_view_id="'.$this->view_id.'" AND view_count="'.$this->get_attempt_id(
                            ).'" ;';
                            $rs_verified = Database::query($sql_verified);
                            $row_verified = Database::fetch_array($rs_verified);

                            // Get type lp: 1=lp dokeos and  2=scorm.
                            // If not is completed or passed or browsed and learning path is scorm.
                            if (!in_array(
                                $this->get_status(false),
                                $case_completed
                            ) && $my_type_lp == 2
                            ) { //&& $this->type!='dir'
                                $total_time = " total_time = total_time +".$this->get_total_time().", ";
                                $my_status = " status = '".$this->get_status(false)."' ,";
                            } else {
                                // Verified into data base.
                                if (!in_array(
                                    $row_verified['status'],
                                    $case_completed
                                ) && $my_type_lp == 2
                                ) { //&& $this->type!='dir'
                                    $total_time = " total_time = total_time +".$this->get_total_time().", ";
                                    $my_status = " status = '".$this->get_status(false)."' ,";
                                } elseif (in_array(
                                    $row_verified['status'],
                                    $case_completed
                                ) && $my_type_lp == 2 && $this->type != 'sco'
                                ) { //&& $this->type!='dir'
                                    $total_time = " total_time = total_time +".$this->get_total_time().", ";
                                    $my_status = " status = '".$this->get_status(false)."' ,";
                                } else {
                                    //&& !in_array($row_verified['status'], $case_completed)
                                    //is lp dokeos
                                    if ($my_type_lp == 1 && $this->type != 'chapter') {
                                        $total_time = " total_time = total_time + ".$this->get_total_time().", ";
                                        $my_status = " status = '".$this->get_status(false)."' ,";
                                    }
                                }
                            }
                        } else {
                            // Multiple attempts are allowed.
                            if (in_array($this->get_status(false), $case_completed) && $my_type_lp == 2) {
                                // Reset zero new attempt ?
                                $my_status = " status = '".$this->get_status(false)."' ,";
                            } elseif (!in_array($this->get_status(false), $case_completed) && $my_type_lp == 2) {
                                $total_time = " total_time = ".$this->get_total_time().", ";
                                $my_status = " status = '".$this->get_status(false)."' ,";
                            } else {
                                // It is dokeos LP.
                                $total_time = " total_time = total_time +".$this->get_total_time().", ";
                                $my_status = " status = '".$this->get_status(false)."' ,";
                            }

                            // Code added by Isaac Flores.
                            // This code line fixes the problem of wrong status.
                            if ($my_type_lp == 2) {
                                // Verify current status in multiples attempts.
                                $sql_status = 'SELECT status FROM '.$item_view_table.'
                                               WHERE c_id = '.$course_id.' AND lp_item_id="'.$this->db_id.'" AND lp_view_id="'.$this->view_id.'" AND view_count="'.$this->get_attempt_id(
                                ).'" ';
                                $rs_status = Database::query($sql_status);
                                $current_status = Database::result($rs_status, 0, 'status');
                                if (in_array($current_status, $case_completed)) {
                                    $my_status = '';
                                    $total_time = '';
                                } else {
                                    $total_time = " total_time = total_time +".$this->get_total_time().", ";
                                }
                            }
                        }
                    }

                    if ($this->type == 'sco') { //IF scorm scorm_update_time has already updated total_tim in db
                        $sql = "UPDATE $item_view_table ".
                            " SET ". //start_time = ".$this->get_current_start_time().", " . //scorm_init_time does it
                            " score = ".$this->get_score().", ".
                            $my_status.
                            " max_score = '".$this->get_max()."',".
                            " suspend_data = '".Database::escape_string($this->current_data)."',".
                            //" max_time_allowed = '".$this->get_max_time_allowed()."'," .
                            " lesson_location = '".$this->lesson_location."' ".
                            "WHERE c_id = $course_id AND lp_item_id = ".$this->db_id." ".
                            "AND lp_view_id = ".$this->view_id." ".
                            "AND view_count = ".$this->get_attempt_id();
                    } else {
                        $sql = "UPDATE $item_view_table ".
                            "SET ".$total_time.
                            " start_time = ".$this->get_current_start_time().", ".
                            " score = ".$this->get_score().", ".
                            $my_status.
                            " max_score = '".$this->get_max()."',".
                            " suspend_data = '".Database::escape_string($this->current_data)."',".
                            //" max_time_allowed = '".$this->get_max_time_allowed()."'," .
                            " lesson_location = '".$this->lesson_location."' ".
                            "WHERE c_id = $course_id AND lp_item_id = ".$this->db_id." ".
                            "AND lp_view_id = ".$this->view_id." ".
                            "AND view_count = ".$this->get_attempt_id();
                    }
                    $this->current_start_time = time();
                }
                if (self::debug > 2) {
                    error_log('learnpathItem::write_to_db() - Updating item_view: '.$sql, 0);
                }
                $res = Database::query($sql);
            }

            if (is_array($this->interactions) && count($this->interactions) > 0) {
                // Save interactions.
                $tbl = Database::get_course_table(TABLE_LP_ITEM_VIEW);
                $sql = "SELECT id FROM $tbl ".
                    "WHERE c_id = $course_id AND lp_item_id = ".$this->db_id." ".
                    "AND   lp_view_id = ".$this->view_id." ".
                    "AND   view_count = ".$this->get_attempt_id();
                $res = Database::query($sql);
                if (Database::num_rows($res) > 0) {
                    $row = Database::fetch_array($res);
                    $lp_iv_id = $row[0];
                    if (self::debug > 2) {
                        error_log(
                            'learnpathItem::write_to_db() - Got item_view_id '.$lp_iv_id.', now checking interactions ',
                            0
                        );
                    }
                    foreach ($this->interactions as $index => $interaction) {
                        $correct_resp = '';
                        if (is_array($interaction[4]) && !empty($interaction[4][0])) {
                            foreach ($interaction[4] as $resp) {
                                $correct_resp .= $resp.',';
                            }
                            $correct_resp = substr($correct_resp, 0, strlen($correct_resp) - 1);
                        }
                        $iva_table = Database::get_course_table(TABLE_LP_IV_INTERACTION);
                        $iva_sql = "SELECT id FROM $iva_table ".
                            "WHERE c_id = $course_id AND lp_iv_id = $lp_iv_id ".
//			 					"AND order_id = $index";
                            //also check for the interaction ID as it must be unique for this SCO view
                            "AND (order_id = $index ".
                            "OR interaction_id = '".Database::escape_string($interaction[0])."')";
                        $iva_res = Database::query($iva_sql);
                        // id(0), type(1), time(2), weighting(3), correct_responses(4), student_response(5), result(6), latency(7)
                        if (Database::num_rows($iva_res) > 0) {
                            // Update (or don't).
                            $iva_row = Database::fetch_array($iva_res);
                            $iva_id = $iva_row[0];
                            $ivau_sql = "UPDATE $iva_table ".
                                "SET interaction_id = '".Database::escape_string($interaction[0])."',".
                                "interaction_type = '".Database::escape_string($interaction[1])."',".
                                "weighting = '".Database::escape_string($interaction[3])."',".
                                "completion_time = '".Database::escape_string($interaction[2])."',".
                                "correct_responses = '".Database::escape_string($correct_resp)."',".
                                "student_response = '".Database::escape_string($interaction[5])."',".
                                "result = '".Database::escape_string($interaction[6])."',".
                                "latency = '".Database::escape_string($interaction[7])."'".
                                "WHERE c_id = $course_id AND id = $iva_id";
                            Database::query($ivau_sql);
                        } else {
                            // Insert new one.
                            $ivai_sql = "INSERT INTO $iva_table (c_id, order_id, lp_iv_id, interaction_id, interaction_type, ".
                                "weighting, completion_time, correct_responses, ".
                                "student_response, result, latency)".
                                "VALUES".
                                "($course_id, ".$index.",".$lp_iv_id.",'".Database::escape_string(
                                $interaction[0]
                            )."','".Database::escape_string($interaction[1])."',".
                                "'".Database::escape_string($interaction[3])."','".Database::escape_string(
                                $interaction[2]
                            )."','".Database::escape_string($correct_resp)."',".
                                "'".Database::escape_string($interaction[5])."','".Database::escape_string(
                                $interaction[6]
                            )."','".Database::escape_string($interaction[7])."'".
                                ")";
                            Database::query($ivai_sql);
                        }
                    }
                }
            }
        }
        if (self::debug > 2) {
            error_log('End of learnpathItem::write_to_db()', 0);
        }

        return true;
    }

    function add_audio()
    {
        $course_info = api_get_course_info();
        $filepath = api_get_path(SYS_COURSE_PATH).$course_info['path'].'/document/';

        if (!is_dir($filepath.'audio')) {
            mkdir($filepath.'audio', api_get_permissions_for_new_directories());
            $audio_id = FileManager::add_document($course_info, '/audio', 'folder', 0, 'audio');
            api_item_property_update(
                $course_info,
                TOOL_DOCUMENT,
                $audio_id,
                'FolderCreated',
                api_get_user_id(),
                null,
                null,
                null,
                null,
                api_get_session_id()
            );
            api_item_property_update(
                $course_info,
                TOOL_DOCUMENT,
                $audio_id,
                'invisible',
                api_get_user_id(),
                null,
                null,
                null,
                null,
                api_get_session_id()
            );
        }

        $key = 'file';

        if (!isset($_FILES[$key]['name']) || !isset($_FILES[$key]['tmp_name'])) {
            return false;
        }
        $result = DocumentManager::upload_document($_FILES, '/audio', null, null, 0, 'rename', false, false);
        $file_path = null;

        if ($result) {
            $file_path = basename($result['path']);

            // Store the mp3 file in the lp_item table.
            $tbl_lp_item = Database::get_course_table(TABLE_LP_ITEM);
            $sql_insert_audio = "UPDATE $tbl_lp_item SET audio = '".Database::escape_string($file_path)."'
                                WHERE c_id = {$course_info['real_id']} AND id = '".Database::escape_string(
                $this->db_id
            )."'";
            Database::query($sql_insert_audio);
        }

        return $file_path;
    }

    function add_audio_from_documents($doc_id)
    {
        $course_info = api_get_course_info();
        $document_data = DocumentManager::get_document_data_by_id($doc_id, $course_info['code']);

        if (!empty($document_data)) {
            $file_path = basename($document_data['path']);
            // Store the mp3 file in the lp_item table.
            $tbl_lp_item = Database::get_course_table(TABLE_LP_ITEM);
            $sql_insert_audio = "UPDATE $tbl_lp_item SET audio = '".Database::escape_string($file_path)."'
                                 WHERE c_id = {$course_info['real_id']} AND id = '".Database::escape_string(
                $this->db_id
            )."'";
            Database::query($sql_insert_audio);
        }

        return $file_path;
    }

    function remove_audio()
    {
        $tbl_lp_item = Database::get_course_table(TABLE_LP_ITEM);
        $course_id = api_get_course_int_id();
        if (empty($this->db_id)) {
            return false;
        }
        $sql = "UPDATE $tbl_lp_item SET audio = '' WHERE c_id = $course_id AND id IN (".$this->db_id.")";
        Database::query($sql);
    }

    static function humanize_status($status, $decorate = true)
    {
        $mylanglist = array(
            'completed' => 'ScormCompstatus',
            'incomplete' => 'ScormIncomplete',
            'failed' => 'ScormFailed',
            'passed' => 'ScormPassed',
            'browsed' => 'ScormBrowsed',
            'not attempted' => 'ScormNotAttempted'
        );

        $my_lesson_status = get_lang($mylanglist[$status]);

        switch ($status) {
            case 'completed':
            case 'browsed':
                $class_status = 'info';
                break;
            case 'incomplete':
                $class_status = 'warning';
                break;
            case 'passed':
                $class_status = 'success';
                break;
            case 'failed':
                $class_status = 'important';
                break;
            default:
                $class_status = 'default';
                break;
        }
        if ($decorate) {
            return Display::label($my_lesson_status, $class_status);
        } else {
            return $my_lesson_status;
        }
    }
}