chamilo-lms2/main/resourcelinker/resourcelinker.inc.php

<?php // $Id: resourcelinker.inc.php 20468 2009-05-11 08:48:25Z ivantcholakov $
/* For licensing terms, see /license.txt */
/**
 * @author Patrick Cool - original version
 * @author Denes Nagy - further improvements for learning path builder
 * @author Roan Embrechts - refactoring to improve code organisation
 * @package chamilo.resourcelinker
 * @todo use the constants for the tools
 * @todo use Database API instead of creating table names locally.
 * @todo This class is used?
 */


use \ChamiloSession as Session;

/**
 * INIT SECTION
 */

include(api_get_path(SYS_CODE_PATH).'exercice/hotpotatoes.lib.php');

/**
 * FUNCTIONS
 */

function unset_session_resources()
{
    $_SESSION['addedresource'] = '';
    $_SESSION['addedresourceid'] = '';
    Session::erase('addedresource');
    Session::erase('addedresourceid');
}

/**
 * Insert description here.
 */
function show_folder_up()
{
    global $folder;
    global $source_id, $action, $learnpath_id, $chapter_id, $originalresource;

    $level = FileManager::get_levels($folder);

    if ($level == 1) {
        echo "<a href='".api_get_self(
        )."?content=Document&amp;source_forum=".$_GET['source_forum']."&amp;source_id=$source_id&amp;action=$action&amp;learnpath_id=$learnpath_id&amp;chapter_id=$chapter_id&amp;originalresource=no'><img src='../img/folder_up.gif' border='0' />".get_lang(
            'LevelUp'
        )."</a>";
    }
    if ($level and $level != 0 and $level != 1) {
        $folder_up = $folder;
        $folder_temp = explode('/', $folder);
        $last = count($folder_temp) - 1;
        unset($folder_temp[$last]);
        $folder_up = implode('/', $folder_temp);
        echo "<a href='".api_get_self(
        )."?content=Document&amp;source_forum=".$_GET['source_forum']."&amp;folder=$folder_up&amp;source_id=$source_id&amp;action=$action&amp;learnpath_id=$learnpath_id&amp;chapter_id=$chapter_id&amp;originalresource=no'><img src='../img/folder_up.gif' border='0' />".get_lang(
            'LevelUp'
        )."</a>";
    }
}

/**
 * Shows the documents of the document tool
 * @param $folder
 */
function show_documents($folder)
{
    $_course = api_get_course_info();
    global $source_id, $action, $learnpath_id, $chapter_id, $originalresource;

    // documents are a special case: the teacher can add an invisible document (it will be viewable by the user)
    // other tools do not have this feature. This only counts
    if (api_is_allowed_to_edit()) {
        $visibility = "ip.visibility<>'2'";
    } else {
        $visibility = "ip.visibility='1'";
    }

    $item_property_table = Database::get_course_table(TABLE_ITEM_PROPERTY);
    $document_table = Database::get_course_table(TABLE_DOCUMENT);
    $sql = "SELECT * from $document_table docs, $item_property_table ip WHERE docs.id=ip.ref AND ip.tool = '".TOOL_DOCUMENT."' AND $visibility AND ip.to_group_id = 0 AND ip.to_user_id IS NULL  ORDER BY docs.path ASC";
    $result = Database::query($sql);
    while ($row = Database::fetch_array($result)) {
        if (!$folder) {
            if (FileManager::get_levels($row['path']) - 1 == 1) {
                // showing the right icon
                if (file_or_folder($row['path'])) {
                    echo '<img src="../img/file.gif" align="middle" />';
                } else {
                    $image = FileManager::choose_image($row['path']);
                    echo "<img src=\"../img/$image\" align=\"middle\" />";
                }

                // folders should be clickable
                if (file_or_folder($row['path'])) {
                    echo "<a href='".api_get_self()."?content=Document";
                    echo "&amp;folder=".substr(
                        $row['path'],
                        1
                    )."&amp;source_id=$source_id&amp;source_forum=".$_GET['source_forum']."&amp;action=$action&amp;learnpath_id=$learnpath_id&amp;chapter_id=$chapter_id&amp;originalresource=no'>".substr(
                        $row['path'],
                        1
                    ).'</a><br />';
                } else {
                    echo substr($row['path'], 1).' ';
                    echo showorhide_addresourcelink('Document', $row['id']);
                    echo '<br />';
                }
            }
        } else {
            // we calculate the level we are in by using the $folder in the url
            // we put +1 because it does not start with an / and in the database it does
            $level = FileManager::get_levels($folder) + 1;

            // we calculate each level of the database entry
            $file_level = FileManager::get_levels($row['path']) - 1;
            // if the level of the database entry is equal to the level we ar in, we put it into an array
            // as this is a potential good entry
            if ($file_level == $level) {
                $good_paths[] = $row['path'];
                $good_ids[] = $row['id'];
            }
            //$haystack=$row['path'];
            //$conform_folder=strstr($haystack, $folder);
            //if (str_replace($folder.'/','',$conform_folder)!==$folder)
            //	{
            //	$good_folders[]=$row['path'];
            //echo str_replace($folder.'/','',$conform_folder);
            //	echo '<br />';
            //	}// if (str_replace($folder.'/','',$conform_folder)!==$folder)
        } // else (if (!$folder))
    } //while ($row=Database::fetch_array($result))

    // this is code for the case that we are in a subfolder
    if ($good_paths) {
        // we have all the potential good database entries, the good ones are those that start with $folder
        foreach ($good_paths as $path) {
            if (strstr($path, $folder)) {
                $good_key = key($good_paths);
                // showing the right icon
                if (file_or_folder($path)) {
                    echo '<img src="../img/file.gif" align="middle" />';
                } else {
                    $image = FileManager::choose_image($path);
                    echo "<img src=\"../img/$image\" align=\"middle\" />";
                }

                // folders should be clickable
                if (file_or_folder($path)) {
                    $path = substr($path, 1); // remove the first / in folder_up
                    $uri = str_replace($folder, $path, $_SERVER['REQUEST_URI']);
                    $newuri = str_replace('add=', 'addnot=', $uri);
                    //using the correct name of the folder
                    $folder_name = str_replace($folder.'/', '', $path);
                    echo "<a href='$newuri'>".$folder_name.'</a><br />';
                } else {
                    echo str_replace("/$folder/", '', $path).' ';
                    echo showorhide_addresourcelink('Document', $good_ids[$good_key]);
                    echo '<br />';
                }
            }
            next($good_paths);
        }
    }
}

/**
 * Checks wether something is a file or a folder
 * 0 means file, 1 means folder
 * @param $filefolder
 * @todo use true and false instead of 1 and 0.
 */
function file_or_folder($filefolder)
{
    $_course = api_get_course_info();
    global $baseServDir;

    $courseDir = $_course['path'].'/document';
    $baseWorkDir = api_get_path(SYS_COURSE_PATH).$courseDir;

    return (is_dir($baseWorkDir.$filefolder) ? 1 : 0);
}

/**
 * Inserts a resource into the database
 *
 * @param $source_type
 * @param $source_id
 */
function store_resources($source_type, $source_id)
{
    $_course = api_get_course_info();
    $resource_table = Database::get_course_table(TABLE_LINKED_RESOURCES);

    $addedresource = $_SESSION['addedresource'];
    $addedresourceid = $_SESSION['addedresourceid'];
    if ($_SESSION['addedresource']) {
        foreach ($addedresource as $resource_type) {
            $sql = "INSERT INTO $resource_table (source_type, source_id, resource_type, resource_id) VALUES ('$source_type', '$source_id', '$resource_type', '".$addedresourceid[key(
                $addedresource
            )]."')";
            Database::query($sql);
            $i = key($addedresource);
            next($addedresource);
        }
        $_SESSION['addedresource'] = '';
        $_SESSION['addedresourceid'] = '';
    }
}

/**
 * Displays the link that opens a new browser window that views the added resource.
 *
 * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
 * @param $type the type of the tool
 * @param $id the id of the resource
 * @param $style this is used to style the link (for instance when a resource is hidden => the added resources should also be styled like they are hidden)
 * @todo use the constants for the type definitions.
 */
function display_addedresource_link($type, $id, $style = '')
{
    $_course = api_get_course_info();

    // styling the link of the added resource
    if ($style <> '') {
        $styling = ' class="'.$style.'"';
    }

    $course_id = api_get_course_int_id();

    switch ($type) {
        case 'Agenda':
            $TABLEAGENDA = Database::get_course_table(TABLE_AGENDA);
            $result = Database::query("SELECT * FROM $TABLEAGENDA WHERE c_id = $course_id AND id=$id");
            $myrow = Database::fetch_array($result);
            echo '<img src="../img/agenda.gif" align="middle" /> <a href="../calendar/agenda.php"'.$styling.'>'.$myrow['title']."</a><br />\n";
            break;
        case 'Ad_Valvas':
            $tbl_announcement = Database::get_course_table(TABLE_ANNOUNCEMENT);
            $result = Database::query("SELECT * FROM $tbl_announcement WHERE c_id = $course_id AND id=$id");
            $myrow = Database::fetch_array($result);
            echo '<img src="../img/valves.gif" align="middle" /> <a href="../announcements/announcements.php"'.$styling.'>'.$myrow['title']."</a><br />\n";
            break;
        case 'Link':
            Database::get_course_table(TABLE_LINK);
            $result = Database::query("SELECT * FROM $TABLETOOLLINK WHERE c_id = $course_id AND id=$id");
            $myrow = Database::fetch_array($result);
            echo '<img src="../img/links.gif" align="middle" /> <a href="#" onclick="javascript:window.open(\'../link/link_goto.php?link_id='.$myrow['id'].'&amp;link_url='.urlencode(
                $myrow['url']
            )."','MyWindow','width=500,height=400,top='+((screen.height-400)/2)+',left='+((screen.width-500)/2)+',scrollbars=1,resizable=1,menubar=1'); return false;\"".$styling.'>'.$myrow['title']."</a><br />\n";
            break;
        case 'Exercise':
            $TBL_EXERCICES = Database::get_course_table(TABLE_QUIZ_TEST);
            $result = Database::query("SELECT * FROM $TBL_EXERCICES WHERE c_id = $course_id AND  id=$id");
            $myrow = Database::fetch_array($result);
            echo '<img src="../img/quiz.gif" align="middle" /> <a href="../exercice/exercise_submit.php?exerciseId='.$myrow['id'].'"'.$styling.'>'.$myrow['title']."</a><br />\n";
            break;
        case 'Forum':
            $TBL_FORUMS = Database::get_course_table(TABLE_FORUM);
            $result = Database::query("SELECT * FROM $TBL_FORUMS WHERE c_id = $course_id AND forum_id=$id");
            $myrow = Database::fetch_array($result);
            echo '<img src="../img/forum.gif" align="middle" /> <a href="../phpbb/viewforum.php?forum='.$myrow['forum_id'].'&amp;md5='.$myrow['md5'].'"'.$styling.'>'.$myrow['forum_name']."</a><br />\n";
            break;
        case 'Thread': //=topics
            //deprecated
            $tbl_posts = $_course['dbNameGlu'].'bb_posts';
            $tbl_posts_text = $_course['dbNameGlu'].'bb_posts_text';
            $TBL_FORUMS = $_course['dbNameGlu'].'bb_forums';
            $result = Database::query(
                "SELECT * FROM $tbl_posts posts, $TBL_FORUMS forum WHERE forum.forum_id=posts.forum_id and post_id=$id"
            );
            $myrow = Database::fetch_array($result);
            // grabbing the title of the post
            $sql_title = "SELECT * FROM $tbl_posts_text WHERE post_id=".$myrow["post_id"];
            $result_title = Database::query($sql_title);
            $myrow_title = Database::fetch_array($result_title);
            echo '<img src="../img/forum.gif" align="middle" /> <a href="../phpbb/viewtopic.php?topic='.$myrow['topic_id'].'&amp;forum='.$myrow['forum_id'].'&amp;md5='.$myrow['md5'].'"'.$styling.'>'.$myrow_title['post_title']."</a><br />\n";
            break;
        case 'Post':
            //deprecated
            $tbl_post = Database::get_course_table(TABLE_FORUM_POST);
            $tbl_post_text = Database::get_course_table(TOOL_FORUM_POST_TEXT_TABLE);
            $sql = "SELECT * FROM $tbl_post p, $tbl_post_text t WHERE p.post_id = t.post_id AND p.post_id = $id";
            $result = Database::query($sql);
            $post = Database::fetch_object($result);
            echo '<img src="../img/forum.gif" align="middle" /> <a href="../phpbb/viewtopic.php?topic='.$post->topic_id.'&amp;forum='.$post->forum_id.'"'.$styling.'>'.$post->post_title."</a><br />\n";
            break;
        case 'Document':
            $dbTable = Database::get_course_table(TABLE_DOCUMENT);
            $result = Database::query("SELECT * FROM $dbTable WHERE c_id = $course_id AND id=$id");
            $myrow = Database::fetch_array($result);
            $pathname = explode('/', $myrow['path']); // making a correct name for the link
            $last = count($pathname) - 1; // making a correct name for the link
            $filename = $pathname[$last]; // making a correct name for the link
            $image = FileManager::choose_image($filename);
            $ext = explode('.', $filename);
            $ext = strtolower($ext[sizeof($ext) - 1]);
            $myrow['path'] = rawurlencode($myrow['path']);
            $in_frames = in_array($ext, array('htm', 'html', 'gif', 'jpg', 'jpeg', 'png'));
            echo '<img src="../img/'.$image.'" align="middle" /> <a href="../document/'.($in_frames ? 'showinframes.php?file=' : 'download.php?doc_url=').$myrow['path'].'"'.$styling.'>'.$filename."</a><br />\n";
            break;
        case 'Externallink':
            echo '<img src="../img/links.gif" align="middle" /> <a href="'.$id.'"'.$styling.'>'.$id."</a><br />\n";
            break;
    }
}

/**
 * This function is to display the added resources (lessons) in the learning path player and builder
 * this function is a modification of display_addedresource_link($type, $id) function
 * the two ids are a bit confusing, I admit, but I did not want to change Patrick's work, I was
 * building upon it. - Denes
 *
 * Parameters:
 * @param completed   - if ="completed" then green presentation with checkbox
 * @param id_in_path  - if onclick then this lesson will be considered completed, that is the unique index in the items table
 * @param id          - that is the correspondent id in the mirror tool (like Agenda item 2)
 * @param type        - that is the correspondent type in the mirror tool (like this is a Link item)
 * @param builder     - if ="builder" then onclick shows in new window
 * @param icon        - if ="icon" then the small icon will appear
 *                      if ="wrap" then wrapped settings are used (and no icon is displayed)
 *                      if ="nolink" then only the name is returned with no href and no icon (note:only in this case, the result is not displayed, but returned)
 * @todo this function is too long, rewrite
 */
function display_addedresource_link_in_learnpath($type, $id, $completed, $id_in_path, $builder, $icon, $level = 0)
{
    global $learnpath_id, $tbl_learnpath_item, $items;
    global $curDirPath, $_configuration, $enableDocumentParsing, $_user, $_cid;
    $_course = api_get_course_info();

    $hyperlink_target_parameter = ''; //or e.g. 'target="_blank"'

    $length = ((($builder == 'builder') and ($icon == 'nolink')) ? 65 : 32);

    if ($builder != 'builder') {
        $origin = 'learnpath';
    } //origin = learnpath in student view
    $linktype = $type;
    if (($type == 'Link _self') or ($type == 'Link _blank')) {
        $type = 'Link';
    }

    switch ($type) {
        case "Agenda":
            $TABLEAGENDA = Database::get_course_table(TABLE_AGENDA, $_course['dbName']);
            $result = Database::query("SELECT * FROM $TABLEAGENDA WHERE id=$id");
            $myrow = Database::fetch_array($result);

            $sql = "select * from $tbl_learnpath_item where id=$id_in_path";
            $result = Database::query($sql);
            $row = Database::fetch_array($result);
            if ($row['title'] != '') {
                $myrow["title"] = $row['title'];
            }
            $desc = $row['description'];
            $agenda_id = $row['item_id'];
            echo str_repeat("&nbsp;&gt;", $level);
            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "<td>";
            }
            if ($icon != 'nolink') {
                if ($completed == 'completed') {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on'>";
                } else {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on' style='visibility: hidden'>";
                    //echo "&nbsp;";
                }
            }
            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "</td><td>";
            }

            if ($myrow["title"] == '') {
                echo "<span class='messagesmall'>".get_lang('StepDeleted1')." $type ".get_lang(
                    'StepDeleted2'
                )."</span>";

                return (true);
            }

            if ($icon == 'nolink') {
                return (shorten($myrow["title"], $length));
            }
            if ($icon == 'icon') {
                echo "<img src='../img/agenda.gif' align=\"absmiddle\" alt='agenda'>";
            }
            if ($builder != 'builder') {
                echo "<a href=\"".api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Agenda&origin=$origin&agenda_id=$agenda_id#$id_in_path\" class='$completed'>".shorten(
                    $myrow["title"],
                    ($length - 3 * $level)
                )."</a>";
                $items[] = api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Agenda&origin=$origin&agenda_id=$agenda_id#$id_in_path";
                if ($desc != '') {
                    if ($icon != 'wrap') {
                        echo "</tr><tr><td></td><td></td><td><div class='description'>&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div></td></tr>";
                    } else {
                        echo "<div class='description'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div>";
                    }
                }
            } else {
                echo "<a href=\"../calendar/agenda.php?origin=$origin&agenda_id=$agenda_id\" class='$completed' target='_blank'>".shorten(
                    $myrow["title"],
                    ($length - 3 * $level)
                )."</a>";
            }
            break;

        case "Ad_Valvas":
            $tbl_announcement = Database::get_course_table(TABLE_ANNOUNCEMENT, $_course['dbName']);
            $result = Database::query("SELECT * FROM $tbl_announcement WHERE id=$id");
            $myrow = Database::fetch_array($result);

            $sql = "select * from $tbl_learnpath_item where id=$id_in_path";
            $result = Database::query($sql);
            $row = Database::fetch_array($result);
            if ($row['title'] != '') {
                $myrow["content"] = $row['title'];
            }
            $desc = $row['description'];
            $ann_id = $row['item_id'];
            echo str_repeat("&nbsp;&gt;", $level);

            // the title and the text are in the content field and we only want to display the title
            list($title, $text) = split('<br>', $myrow['content']);
            if ($title == '') {
                $title = $myrow['content'];
            }
            $title = $myrow['title'];
            $text = $myrow['content'];
            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "<td>";
            }
            if ($icon != 'nolink') {
                if ($completed == 'completed') {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on'>";
                } else {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on' style='visibility: hidden'>";
                    //echo "&nbsp;";
                }
            }
            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "</td><td>";
            }

            if ($title == '') {
                $type = "Announcement";
                echo "<span class='messagesmall'>".get_lang('StepDeleted1')." $type ".get_lang(
                    'StepDeleted2'
                )."</span>";

                return (true);
            }

            if ($icon == 'nolink') {
                return (shorten($title, $length));
            }
            if ($icon == 'icon') {
                echo "<img src='../img/valves.gif' align=\"absmiddle\" alt='ad valvas'>";
            }
            if ($builder != 'builder') {
                echo "<a href=\"".api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Ad_Valvas&origin=$origin&ann_id=$ann_id#$id_in_path\" class='$completed'>".shorten(
                    $title,
                    ($length - 3 * $level)
                )."</a>";
                $items[] = api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Ad_Valvas&origin=$origin&ann_id=$ann_id#$id_in_path";
                if ($desc != '') {
                    if ($icon != 'wrap') {
                        echo "</tr><tr><td></td><td></td><td><div class='description'>&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div></td></tr>";
                    } else {
                        echo "<div class='description'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div>";
                    }
                }
            } else {
                echo "<a href=\"../announcements/announcements.php?origin=$origin&ann_id=$ann_id\" class='$completed' target='_blank'>".shorten(
                    $title,
                    ($length - 3 * $level)
                )."</a>";
            }
            break;

        case "Link" :
            $TABLETOOLLINK = Database::get_course_table(TABLE_LINK, $_course['dbName']);
            $result = Database::query("SELECT * FROM $TABLETOOLLINK WHERE id=$id");
            $myrow = Database::fetch_array($result);

            $sql = "select * from $tbl_learnpath_item where id=$id_in_path";
            $result = Database::query($sql);
            $row = Database::fetch_array($result);
            if ($row['title'] != '') {
                $myrow["title"] = $row['title'];
            }
            $desc = $row['description'];
            echo str_repeat("&nbsp;&gt;", $level);

            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "<td>";
            }
            if ($icon != 'nolink') {
                if ($completed == 'completed') {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on'>";
                } else {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on' style='visibility: hidden'>";
                    //echo "&nbsp;";
                }
            }
            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "</td><td>";
            }

            if ($myrow["title"] == '') {
                echo "<span class='messagesmall'>".get_lang('StepDeleted1')." $type ".get_lang(
                    'StepDeleted2'
                )."</span>";

                return (true);
            }

            if ($icon == 'nolink') {
                return (shorten($myrow["title"], $length));
            }
            if ($icon == 'icon') {
                if ($linktype == 'Link _self') {
                    echo "<img src='../img/links.gif' align=\"absmiddle\" alt='links'>";
                } else {
                    echo "<img src='../img/link_blank.gif' align=\"absmiddle\" alt='blank links'>";
                }
            }
            $thelink = $myrow["url"];
            if ($builder != 'builder') {
                echo "<a href=\"".api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=$linktype&origin=$origin&thelink=$thelink#$id_in_path\" class='$completed'>".shorten(
                    $myrow["title"],
                    ($length - 3 * $level)
                )."</a>";
                $items[] = api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=$linktype&origin=$origin&thelink=$thelink#$id_in_path";
                if ($desc != '') {
                    if ($icon != 'wrap') {
                        echo "</tr><tr><td></td><td></td><td><div class='description'>&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div></td></tr>";
                    } else {
                        echo "<div class='description'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div>";
                    }
                }
            } else {
                echo "<a href=\"$thelink\" class='$completed' target='_blank'>".shorten(
                    $myrow["title"],
                    ($length - 3 * $level)
                )."</a>";
            }
            break;

        case "Exercise":
            $TBL_EXERCICES = Database::get_course_table(TABLE_QUIZ_TEST, $_course['dbName']);
            $result = Database::query("SELECT * FROM $TBL_EXERCICES WHERE id=$id");
            $myrow = Database::fetch_array($result);

            if ($builder == 'builder') {
                $origin = 'builder';
            }
            //this is needed for the exercise_submit.php can delete the session info about tests

            $sql = "select * from $tbl_learnpath_item where id=$id_in_path";
            $result = Database::query($sql);
            $row = Database::fetch_array($result);
            if ($row['title'] != '') {
                $myrow["title"] = $row['title'];
            }
            $desc = $row['description'];
            echo str_repeat("&nbsp;&gt;", $level);

            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "<td>";
            }
            if ($icon != 'nolink') {
                if ($completed == 'completed') {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on'>";
                } else {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on' style='visibility: hidden'>";
                    //echo "&nbsp;";
                }
            }
            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "</td><td>";
            }

            if ($myrow["title"] == '') {
                echo "<span class='messagesmall'>".get_lang('StepDeleted1')." $type ".get_lang(
                    'StepDeleted2'
                )."</span>";

                return (true);
            }

            if ($icon == 'nolink') {
                return (shorten($myrow["title"], $length));
            }
            if ($icon == 'icon') {
                echo "<img src='../img/quiz.gif' align=\"absmiddle\" alt='quizz'>";
            }
            if ($builder != 'builder') {
                echo "<a href=\"".api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Exercise&origin=$origin&exerciseId=".$myrow["id"]."#$id_in_path\" class='$completed'>".shorten(
                    $myrow["title"],
                    ($length - 3 * $level)
                )."</a>";
                $items[] = api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Exercise&origin=$origin&exerciseId=".$myrow["id"]."#$id_in_path";
                if ($desc != '') {
                    if ($icon != 'wrap') {
                        echo "</tr><tr><td></td><td></td><td><div class='description'>&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div></td></tr>";
                    } else {
                        echo "<div class='description'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div>";
                    }
                }
            } else {
                echo "<a href=\"../exercice/exercise_submit.php?origin=$origin&exerciseId=".$myrow["id"]."\" class='$completed' target='_blank'>".shorten(
                    $myrow["title"],
                    ($length - 3 * $level)
                )."</a>";
            }
            break;

        case "HotPotatoes":
            $TBL_DOCUMENT = Database::get_course_table(TABLE_DOCUMENT, $_course['dbName']);
            $documentPath = api_get_path(SYS_COURSE_PATH).$_course['path'].'/document';
            $result = Database::query("SELECT * FROM ".$TBL_DOCUMENT." WHERE id=$id");
            $myrow = Database::fetch_array($result);
            $path = $myrow["path"];
            $name = GetQuizName($path, $documentPath);

            if ($builder == 'builder') {
                $origin = 'builder';
            }
            //this is needed for the exercise_submit.php can delete the session info about tests

            $sql = "select * from $tbl_learnpath_item where id=$id_in_path";
            $result = Database::query($sql);
            $row = Database::fetch_array($result);
            if ($row['title'] != '') {
                $name = $row['title'];
            }
            $desc = $row['description'];
            echo str_repeat("&nbsp;&gt;", $level);

            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "<td>";
            }
            if ($icon != 'nolink') {
                if ($completed == 'completed') {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on'>";
                } else {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on' style='visibility: hidden'>";
                    //echo "&nbsp;";
                }
            }
            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "</td><td>";
            }

            if ($name == '') {
                echo "<span class='messagesmall'>".get_lang('StepDeleted1')." $type ".get_lang(
                    'StepDeleted2'
                )."</span>";

                return (true);
            }

            if ($icon == 'nolink') {
                return (shorten($name, $length));
            }
            if ($icon == 'icon') {
                echo "<img src='../img/jqz.gif' align=\"absmiddle\" alt='hot potatoes'>";
            }

            $cid = $_course['official_code'];

            if ($builder != 'builder') {
                echo "<a href=\"".api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=HotPotatoes&origin=$origin&id=$id#$id_in_path\" class='$completed'>".shorten(
                    $name,
                    ($length - 3 * $level)
                )."</a>";
                $items[] = api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=HotPotatoes&origin=$origin&id=$id#$id_in_path";
                if ($desc != '') {
                    if ($icon != 'wrap') {
                        echo "</tr><tr><td></td><td></td><td><div class='description'>&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div></td></tr>";
                    } else {
                        echo "<div class='description'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div>";
                    }
                }
            } else {
                echo "&nbsp;<a href=\"../exercice/showinframes.php?file=$path&cid=$cid&uid=".$_user['user_id']."\" class='$completed' target='_blank'>".shorten(
                    $name,
                    ($length - 3 * $level)
                )."</a>";
            }
            break;

        case "Forum":
            $TBL_FORUMS = Database::get_course_table(TABLE_FORUM, $_course['dbName']);
            $result = Database::query("SELECT * FROM $TBL_FORUMS WHERE forum_id=$id");
            $myrow = Database::fetch_array($result);

            $sql = "select * from $tbl_learnpath_item where id=$id_in_path";
            $result = Database::query($sql);
            $row = Database::fetch_array($result);
            if ($row['title'] != '') {
                $myrow["forum_name"] = $row['title'];
            }
            $desc = $row['description'];
            echo str_repeat("&nbsp;&gt;", $level);

            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "<td>";
            }
            if ($icon != 'nolink') {
                if ($completed == 'completed') {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on'>";
                } else {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on' style='visibility: hidden'>";
                    //echo "&nbsp;";
                }
            }
            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "</td><td>";
            }

            if ($myrow["forum_name"] == '') {
                $type = "Forum";
                echo "<span class='messagesmall'>".get_lang('StepDeleted1')." $type ".get_lang(
                    'StepDeleted2'
                )."</span>";

                return (true);
            }

            if ($icon == 'nolink') {
                return (shorten($myrow["forum_name"], $length));
            }
            if ($icon == 'icon') {
                echo "<img src='../img/forum.gif' align=\"absmiddle\" alt='forum'>";
            }
            $forumparameters = "forum=".$myrow["forum_id"]."&md5=".$myrow["md5"];
            if ($builder != 'builder') {
                echo "<a href=\"".api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Forum&origin=$origin&forumparameters=$forumparameters#$id_in_path\" class='$completed'>".shorten(
                    $myrow["forum_name"],
                    ($length - 3 * $level)
                )."</a>";
                $items[] = api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Forum&origin=$origin&forumparameters=$forumparameters#$id_in_path";
                if ($desc != '') {
                    if ($icon != 'wrap') {
                        echo "</tr><tr><td></td><td></td><td><div class='description'>&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div></td></tr>";
                    } else {
                        echo "<div class='description'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div>";
                    }
                }
            } else {
                echo "<a href=\"../phpbb/viewforum.php?$forumparameters\" class='$completed' target='_blank'>".shorten(
                    $myrow["forum_name"],
                    ($length - 3 * $level)
                )."</a>";
            }
            break;

        case "Thread": //forum post
            //deprecated
            $tbl_topics = $_course['dbNameGlu'].'bb_topics';
            $tbl_posts = $_course['dbNameGlu'].'bb_posts';
            $TBL_FORUMS = $_course['dbNameGlu']."bb_forums";
            $sql = "SELECT * FROM $tbl_topics where topic_id=$id";
            $result = Database::query($sql);
            $myrow = Database::fetch_array($result);

            $sql = "select * from $tbl_learnpath_item where id=$id_in_path";
            $result = Database::query($sql);
            $row = Database::fetch_array($result);
            if ($row['title'] != '') {
                $myrow["topic_title"] = $row['title'];
            }
            $desc = $row['description'];
            echo str_repeat("&nbsp;&gt;", $level);

            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "<td>";
            }
            if ($icon != 'nolink') {
                if ($completed == 'completed') {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on'>";
                } else {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on' style='visibility: hidden'>";
                    //echo "&nbsp;";
                }
            }
            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "</td><td>";
            }

            if ($myrow["topic_title"] == '') {
                $type = "Forum Post";
                echo "<span class='messagesmall'>".get_lang('StepDeleted1')." $type ".get_lang(
                    'StepDeleted2'
                )."</span>";

                return (true);
            }

            if ($icon == 'nolink') {
                return (shorten($myrow["topic_title"], $length));
            }
            if ($icon == 'icon') {
                echo "<img src='../img/forum.gif' align=\"absmiddle\" alt='forum'>";
            }
            if ($builder != 'builder') {
                echo "<a href=\"".api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Thread&origin=$origin&topic=".$myrow["topic_id"]."&forum=".$myrow["forum_id"]."&md5=".$myrow["md5"]."#$id_in_path\" class='$completed'>".shorten(
                    $myrow["topic_title"],
                    ($length - 3 * $level)
                )."</a>";
                $items[] = api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Thread&origin=$origin&topic=".$myrow["topic_id"]."&forum=".$myrow["forum_id"]."&md5=".$myrow["md5"]."#$id_in_path";
                if ($desc != '') {
                    if ($icon != 'wrap') {
                        echo "</tr><tr><td></td><td></td><td><div class='description'>&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div></td></tr>";
                    } else {
                        echo "<div class='description'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div>";
                    }
                }
            } else {
                echo "<a href=\"../phpbb/viewtopic.php?topic=".$myrow["topic_id"]."&forum=".$myrow["forum_id"]."&md5=".$myrow["md5"]."\" class='$completed' target='_blank'>".shorten(
                    $myrow["topic_title"],
                    ($length - 3 * $level)
                )."</a>";
            }
            break;

        case "Post":
            //deprecated
            $tbl_posts = $_course['dbNameGlu'].'bb_posts';
            $tbl_posts_text = $_course['dbNameGlu'].'bb_posts_text';
            $TBL_FORUMS = $_course['dbNameGlu']."bb_forums";
            $result = Database::query("SELECT * FROM $tbl_posts where post_id=$id");
            $myrow = Database::fetch_array($result);
            // grabbing the title of the post
            $sql_titel = "SELECT * FROM $tbl_posts_text WHERE post_id=".$myrow["post_id"];
            $result_titel = Database::query($sql_titel);
            $myrow_titel = Database::fetch_array($result_titel);

            $sql = "select * from $tbl_learnpath_item where id=$id_in_path";
            $result = Database::query($sql);
            $row = Database::fetch_array($result);
            if ($row['title'] != '') {
                $myrow_titel["post_title"] = $row['title'];
            }
            $desc = $row['description'];
            echo str_repeat("&nbsp;&gt;", $level);

            $posternom = $myrow['nom'];
            $posterprenom = $myrow['prenom'];
            $posttime = $myrow['post_time'];
            $posttext = $myrow_titel['post_text'];
            $posttitle = $myrow_titel['post_title'];
            $posttext = str_replace('"', "'", $posttext);

            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "<td>";
            }
            if ($icon != 'nolink') {
                if ($completed == 'completed') {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on'>";
                } else {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on' style='visibility: hidden'>";
                    //echo "&nbsp;";
                }
            }
            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "</td><td>";
            }

            if ($myrow_titel["post_title"] == '') {
                $type = "Forum";
                echo "<span class='messagesmall'>".get_lang('StepDeleted1')." $type ".get_lang(
                    'StepDeleted2'
                )."</span>";

                return (true);
            }

            if ($icon == 'nolink') {
                return (shorten($myrow_titel["post_title"], $length));
            }
            if ($icon == 'icon') {
                echo "<img src='../img/forum.gif' align=\"absmiddle\" alt='forum'>";
            }
            if ($builder != 'builder') {
                echo "<a href=\"".api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Post&origin=$origin&posternom=$posternom&posterprenom=$posterprenom&posttime=$posttime&posttext=$posttext&posttitle=$posttitle#$id_in_path\" class='$completed'>".shorten(
                    $myrow_titel["post_title"],
                    ($length - 3 * $level)
                )."</a>";
                $items[] = api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Post&origin=$origin&posternom=$posternom&posterprenom=$posterprenom&posttime=$posttime&posttext=$posttext&posttitle=$posttitle#$id_in_path";
                if ($desc != '') {
                    if ($icon != 'wrap') {
                        echo "</tr><tr><td></td><td></td><td><div class='description'>&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div></td></tr>";
                    } else {
                        echo "<div class='description'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div>";
                    }
                }
            } else {
                echo "<a href=\"../phpbb/viewtopic.php?topic=".$myrow["topic_id"]."&forum=".$myrow["forum_id"]."&md5=".$myrow["md5"]."\" class='$completed' target='_blank'>".shorten(
                    $myrow_titel["post_title"],
                    ($length - 3 * $level)
                )."</a>";
            }
            break;

        case "Document":
            $dbTable = Database::get_course_table(TABLE_DOCUMENT, $_course['dbName']);
            $result = Database::query("SELECT * FROM $dbTable WHERE id=$id");
            $myrow = Database::fetch_array($result);

            $pathname = explode("/", $myrow["path"]); // making a correct name for the link
            $last = count($pathname) - 1; // making a correct name for the link
            $filename = $pathname[$last]; // making a correct name for the link
            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "<td>";
            }

            echo str_repeat("&nbsp;&gt;", $level);

            if ($icon != 'nolink') {
                if ($completed == 'completed') {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on'>";
                } else {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on' style='visibility: hidden'>";
                    //echo "&nbsp;";
                }
            }
            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "</td><td>";
            }
            $image = FileManager::choose_image($filename);

            $sql = "select * from $tbl_learnpath_item where id=$id_in_path";
            $result = Database::query($sql);
            $row = Database::fetch_array($result);
            if ($row['title'] != '') {
                $filename = $row['title'];
            }
            $desc = $row['description'];

            if (($myrow["path"] == '') and ($filename == '')) {
                echo "<span class='messagesmall'>".get_lang('StepDeleted1')." $type ".get_lang(
                    'StepDeleted2'
                )."</span>";

                return (true);
            }

            if ($icon == 'nolink') {
                return (shorten($filename, $length));
            }
            if ($icon == 'icon') {
                echo "<img src='../img/$image' align=\"absmiddle\" alt='$image'>";
            }
            if ($builder != 'builder') {
                echo "<a href=\"".api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Document&origin=$origin&docurl=".$myrow["path"]."#$id_in_path\" class='$completed'>".shorten(
                    $filename,
                    ($length - 3 * $level)
                )."</a>";
                if ($desc != '') {
                    if ($icon != 'wrap') {
                        echo "</tr><tr><td></td><td></td><td><div class='description'>&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div></td></tr>";
                    } else {
                        echo "<div class='description'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div>";
                    }
                }
                $items[] = api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Document&origin=$origin&docurl=".$myrow["path"]."#$id_in_path";
            } else {
                $enableDocumentParsing = 'yes';
                if (!$enableDocumentParsing) { //this is the solution for the non-parsing version in the builder
                    $file = urlencode($myrow["path"]);
                    echo "<a href='../document/showinframes.php?file=$file' class='$completed' $hyperlink_target_parameter>".shorten(
                        $filename,
                        ($length - 3 * $level)
                    )."</a>";
                } else {
                    echo "<a href=\"../document/download.php?doc_url=".$myrow["path"]."\" class='$completed' $hyperlink_target_parameter>".shorten(
                        $filename,
                        ($length - 3 * $level)
                    )."</a>";
                }
            }
            break;

        case "Assignments":
            $name = get_lang('Assignments');
            $sql = "select * from $tbl_learnpath_item where id=$id_in_path";
            $result = Database::query($sql);
            $row = Database::fetch_array($result);
            if ($row['title'] != '') {
                $name = $row['title'];
            }
            $desc = $row['description'];
            echo str_repeat("&nbsp;&gt;", $level);

            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "<td>";
            }
            if ($icon != 'nolink') {
                if ($completed == 'completed') {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on'>";
                } else {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on' style='visibility: hidden'>";
                    //echo "&nbsp;";
                }
            }
            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "</td><td>";
            }

            if ($name == '') {
                echo "<span class='messagesmall'>".get_lang('StepDeleted1')." $type ".get_lang(
                    'StepDeleted2'
                )."</span>";

                return (true);
            }

            if ($icon == 'nolink') {
                return (shorten($name, $length));
            }
            if ($icon == 'icon') {
                echo "<img src='../img/works.gif' align=\"absmiddle\">";
            }
            if ($builder != 'builder') {
                echo "<a href=\"".api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Assignments&origin=$origin#$id_in_path\" class='$completed'>".shorten(
                    $name,
                    ($length - 3 * $level)
                )."</a>";
                $items[] = api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Assignments&origin=$origin#$id_in_path";
                if ($desc != '') {
                    if ($icon != 'wrap') {
                        echo "</tr><tr><td></td><td></td><td><div class='description'>&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div></td></tr>";
                    } else {
                        echo "<div class='description'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div>";
                    }
                }
            } else {
                echo "<a href=\"../work/work.php\" class='$completed' target='_blank'>".shorten(
                    $name,
                    ($length - 3 * $level)
                )."</a>";
            }
            break;
        case "Dropbox":
            $name = get_lang('Dropbox');
            $sql = "select * from $tbl_learnpath_item where id=$id_in_path";
            $result = Database::query($sql);
            $row = Database::fetch_array($result);
            if ($row['title'] != '') {
                $name = $row['title'];
            }
            $desc = $row['description'];
            echo str_repeat("&nbsp;&gt;", $level);

            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "<td>";
            }
            if ($icon != 'nolink') {
                if ($completed == 'completed') {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on'>";
                } else {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on' style='visibility: hidden'>";
                    //echo "&nbsp;";
                }
            }
            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "</td><td>";
            }

            if ($name == '') {
                echo "<span class='messagesmall'>".get_lang('StepDeleted1')." $type ".get_lang(
                    'StepDeleted2'
                )."</span>";

                return (true);
            }

            if ($icon == 'nolink') {
                return (shorten($name, $length));
            }
            if ($icon == 'icon') {
                echo "<img src='../img/dropbox.gif' align=\"absmiddle\">";
            }

            if ($builder != 'builder') {
                echo "<a href=\"".api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Dropbox&origin=$origin#$id_in_path\" class='$completed'>".shorten(
                    $name,
                    ($length - 3 * $level)
                )."</a>";
                $items[] = api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Dropbox&origin=$origin#$id_in_path";
                if ($desc != '') {
                    if ($icon != 'wrap') {
                        echo "</tr><tr><td></td><td></td><td><div class='description'>&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div></td></tr>";
                    } else {
                        echo "<div class='description'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div>";
                    }
                }
            } else {
                echo "<a href=\"../dropbox/index.php\" class='$completed' target='_blank'>".shorten(
                    $name,
                    ($length - 3 * $level)
                )."</a>";
            }
            break;
        case "Introduction_text":
            $name = get_lang('IntroductionText');
            $sql = "select * from $tbl_learnpath_item where id=$id_in_path";
            $result = Database::query($sql);
            $row = Database::fetch_array($result);
            if ($row['title'] != '') {
                $name = $row['title'];
            }
            $desc = $row['description'];
            echo str_repeat("&nbsp;&gt;", $level);

            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "<td>";
            }
            if ($icon != 'nolink') {
                if ($completed == 'completed') {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on'>";
                } else {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on' style='visibility: hidden'>";
                    //echo "&nbsp;";
                }
            }
            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "</td><td>";
            }

            if ($name == '') {
                echo "<span class='messagesmall'>".get_lang('StepDeleted1')." $type ".get_lang(
                    'StepDeleted2'
                )."</span>";

                return (true);
            }

            if ($icon == 'nolink') {
                return (shorten($name, $length));
            }
            if ($icon == 'icon') {
                echo "<img src='../img/introduction.gif' align=\"absmiddle\" alt='introduction'>";
            }

            if ($builder != 'builder') {
                echo "<a href=\"".api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Introduction_text&origin=$origin#$id_in_path\" class='$completed'>".shorten(
                    $name,
                    ($length - 3 * $level)
                )."</a>";
                $items[] = api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Introduction_text&origin=$origin#$id_in_path";
                if ($desc != '') {
                    if ($icon != 'wrap') {
                        echo "</tr><tr><td></td><td></td><td><div class='description'>&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div></td></tr>";
                    } else {
                        echo "<div class='description'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div>";
                    }
                }
            } else {
                $s = api_get_path(WEB_COURSE_PATH)."$_cid/index.php?intro_cmdEdit=1";
                echo "<a href=\"$s\" class='$completed' target='_blank'>".shorten($name, ($length - 3 * $level))."</a>";
            }
            break;
        case "Course_description":
            $name = get_lang('CourseDescription');
            $sql = "select * from $tbl_learnpath_item where id=$id_in_path";
            $result = Database::query($sql);
            $row = Database::fetch_array($result);
            if ($row['title'] != '') {
                $name = $row['title'];
            }
            $desc = $row['description'];
            echo str_repeat("&nbsp;&gt;", $level);

            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "<td>";
            }
            if ($icon != 'nolink') {
                if ($completed == 'completed') {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on'>";
                } else {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on' style='visibility: hidden'>";
                    //echo "&nbsp;";
                }
            }
            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "</td><td>";
            }

            if ($name == '') {
                echo "<span class='messagesmall'>".get_lang('StepDeleted1')." $type ".get_lang(
                    'StepDeleted2'
                )."</span>";

                return (true);
            }

            if ($icon == 'nolink') {
                return (shorten($name, $length));
            }
            if ($icon == 'icon') {
                echo "<img src='../img/info.gif' align=\"absmiddle\" alt='info'>";
            }

            if ($builder != 'builder') {
                echo "<a href=\"".api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Course_description&origin=$origin#$id_in_path\" class='$completed'>".shorten(
                    $name,
                    ($length - 3 * $level)
                )."</a>";
                $items[] = api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Course_description&origin=$origin#$id_in_path";
                if ($desc != '') {
                    if ($icon != 'wrap') {
                        echo "</tr><tr><td></td><td></td><td><div class='description'>&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div></td></tr>";
                    } else {
                        echo "<div class='description'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div>";
                    }
                }
            } else {
                $s = api_get_path(WEB_CODE_PATH)."course_description";
                echo "<a href=\"$s\" class='$completed' target='_blank'>".shorten($name, ($length - 3 * $level))."</a>";
            }
            break;
        case "Groups":
            $name = get_lang('Groups');
            $sql = "select * from $tbl_learnpath_item where id=$id_in_path";
            $result = Database::query($sql);
            $row = Database::fetch_array($result);
            if ($row['title'] != '') {
                $name = $row['title'];
            }
            $desc = $row['description'];
            echo str_repeat("&nbsp;&gt;", $level);

            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "<td>";
            }
            if ($icon != 'nolink') {
                if ($completed == 'completed') {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on'>";
                } else {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on' style='visibility: hidden'>";
                    //echo "&nbsp;";
                }
            }
            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "</td><td>";
            }

            if ($name == '') {
                echo "<span class='messagesmall'>".get_lang('StepDeleted1')." $type ".get_lang(
                    'StepDeleted2'
                )."</span>";

                return (true);
            }

            if ($icon == 'nolink') {
                return (shorten($name, $length));
            }
            if ($icon == 'icon') {
                echo "<img src='../img/group.gif' align=\"absmiddle\" alt='group'>";
            }

            if ($builder != 'builder') {
                echo "<a href=\"".api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Groups&origin=$origin#$id_in_path\" class='$completed'>".shorten(
                    $name,
                    ($length - 3 * $level)
                )."</a>";
                $items[] = api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Groups&origin=$origin#$id_in_path";
                if ($desc != '') {
                    if ($icon != 'wrap') {
                        echo "</tr><tr><td></td><td></td><td><div class='description'>&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div></td></tr>";
                    } else {
                        echo "<div class='description'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div>";
                    }
                }
            } else {
                echo "<a href=\"../group/group.php?origin=$origin\" class='$completed' target='_blank'>".shorten(
                    $name,
                    ($length - 3 * $level)
                )."</a>";
            }
            break;
        case "Users":
            $name = get_lang('Users');
            $sql = "select * from $tbl_learnpath_item where id=$id_in_path";
            $result = Database::query($sql);
            $row = Database::fetch_array($result);
            if ($row['title'] != '') {
                $name = $row['title'];
            }
            $desc = $row['description'];
            echo str_repeat("&nbsp;&gt;", $level);

            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "<td>";
            }
            if ($icon != 'nolink') {
                if ($completed == 'completed') {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on'>";
                } else {
                    echo "<img src='../img/checkbox_on2.gif' border='0' width='13' height='11' alt='on' style='visibility: hidden'>";
                    //echo "&nbsp;";
                }
            }
            if (($builder != 'builder') and ($icon != 'wrap')) {
                echo "</td><td>";
            }

            if ($name == '') {
                echo "<span class='messagesmall'>".get_lang('StepDeleted1')." $type ".get_lang(
                    'StepDeleted2'
                )."</span>";

                return (true);
            }

            if ($icon == 'nolink') {
                return (shorten($name, $length));
            }
            if ($icon == 'icon') {
                echo "<img src='../img/members.gif' align=\"absmiddle\" alt='members'>";
            }

            if ($builder != 'builder') {
                echo "<a href=\"".api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Users&origin=$origin#$id_in_path\" class='$completed'>".shorten(
                    $name,
                    ($length - 3 * $level)
                )."</a>";
                $items[] = api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Users&origin=$origin#$id_in_path";
                if ($desc != '') {
                    if ($icon != 'wrap') {
                        echo "</tr><tr><td></td><td></td><td><div class='description'>&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div></td></tr>";
                    } else {
                        echo "<div class='description'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".shorten(
                            $desc,
                            ($length - 3 * $level)
                        )."</div>";
                    }
                }
            } else {
                echo "<a href=\"../user/user.php?origin=$origin\" class='$completed' target='_blank'>".shorten(
                    $name,
                    ($length - 3 * $level)
                )."</a>";
            }
            break;
    }
    //end huge switch-statement
}

/**
 * This function is to create and return a link to the added resources (lessons).
 * It returns the same thing as display_addedresource_link_in_learnpath() but doesn't display
 * anything.
 *
 * Parameters:
 * @param type        - that is the correspondent type in the mirror tool (like this is a Link item)
 * @param id          - that is the correspondent id in the mirror tool (like Agenda item 2)
 * @param id_in_path  - the unique index in the items table
 */
function get_addedresource_link_in_learnpath($type, $id, $id_in_path)
{
    global $learnpath_id, $tbl_learnpath_item, $items;
    global $curDirPath, $_configuration, $enableDocumentParsing, $_user, $_cid;

    $_course = api_get_course_info();

    $hyperlink_target_parameter = ""; //or e.g. target='_blank'
    $builder = 'player';
    $origin = 'learnpath';

    $linktype = $type;
    if (($type == "Link _self") or ($type == "Link _blank")) {
        $type = "Link";
    }

    $link = '';

    switch ($type) {
        case "Agenda":
            $TABLEAGENDA = Database::get_course_table(TABLE_AGENDA, $_course['dbName']);
            ;
            $result = Database::query("SELECT * FROM $TABLEAGENDA WHERE id=$id");
            $myrow = Database::fetch_array($result);

            $sql = "select * from $tbl_learnpath_item where id=$id_in_path";
            $result = Database::query($sql);
            $row = Database::fetch_array($result);
            if ($row['title'] != '') {
                $myrow["title"] = $row['title'];
            }
            $desc = $row['description'];
            $agenda_id = $row['item_id'];

            if ($builder != 'builder') {
                $link .= api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Agenda&origin=$origin&agenda_id=$agenda_id#$id_in_path";
            } else {
                $link .= "../calendar/agenda.php?origin=$origin&agenda_id=$agenda_id";
            }
            break;

        case "Ad_Valvas":
            $tbl_announcement = Database::get_course_table(TABLE_ANNOUNCEMENT);
            $result = Database::query("SELECT * FROM $tbl_announcement WHERE id=$id");
            $myrow = Database::fetch_array($result);

            if ($builder != 'builder') {
                $link .= api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Ad_Valvas&origin=$origin&ann_id=$id#$id_in_path";
            } else {
                $link .= "../announcements/announcements.php?origin=$origin&ann_id=$id";
            }
            break;

        case "Link" :
            $TABLETOOLLINK = Database::get_course_table(TABLE_LINK, $_course['dbName']);
            $result = Database::query("SELECT * FROM $TABLETOOLLINK WHERE id=$id");
            $myrow = Database::fetch_array($result);

            $sql = "select * from $tbl_learnpath_item where id=$id_in_path";
            $result = Database::query($sql);
            $row = Database::fetch_array($result);

            $thelink = $myrow["url"];
            if ($builder != 'builder') {
                $link .= api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=$linktype&origin=$origin&thelink=$thelink#$id_in_path";
            } else {
                $link .= $thelink;
            }
            break;

        case "Exercise":
            $TBL_EXERCICES = Database::get_course_table(TABLE_QUIZ_TEST, $_course['dbName']);
            $result = Database::query("SELECT * FROM $TBL_EXERCICES WHERE id=$id");
            $myrow = Database::fetch_array($result);

            if ($builder == 'builder') {
                $origin = 'builder';
            }
            //this is needed for the exercise_submit.php can delete the session info about tests

            $sql = "select * from $tbl_learnpath_item where id=$id_in_path";
            $result = Database::query($sql);
            $row = Database::fetch_array($result);
            if ($row['title'] != '') {
                $myrow["title"] = $row['title'];
            }

            if ($builder != 'builder') {
                $link .= api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Exercise&origin=$origin&exerciseId=".$myrow["id"]."#$id_in_path";
            } else {
                $link .= "../exercice/exercise_submit.php?origin=$origin&exerciseId=".$myrow["id"];
            }
            break;

        case "HotPotatoes":
            $TBL_DOCUMENT = Database::get_course_table(TABLE_DOCUMENT, $_course['dbName']);
            $documentPath = api_get_path(SYS_COURSE_PATH).$_course['path'].'/document';
            $result = Database::query("SELECT * FROM ".$TBL_DOCUMENT." WHERE id=$id");
            $myrow = Database::fetch_array($result);
            $path = $myrow["path"];
            $name = GetQuizName($path, $documentPath);

            if ($builder == 'builder') {
                $origin = 'builder';
            }

            $cid = $_course['official_code'];

            if ($builder != 'builder') {
                $link .= api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=HotPotatoes&origin=$origin&id=$id#$id_in_path";
            } else {
                $link .= "../exercice/showinframes.php?file=$path&cid=$cid&uid=".$_user['user_id']."";
            }
            break;

        case "Forum":
            //deprecated
            $TBL_FORUMS = Database::get_course_table(TABLE_FORUM, $_course['dbName']);
            $result = Database::query("SELECT * FROM $TBL_FORUMS WHERE forum_id=$id");
            $myrow = Database::fetch_array($result);

            if ($builder == 'builder') {
                $origin = 'builder';
            }

            $sql = "select * from $tbl_learnpath_item where id=$id_in_path";
            $result = Database::query($sql);
            $row = Database::fetch_array($result);
            if ($row['title'] != '') {
                $myrow["forum_name"] = $row['title'];
            }

            if ($myrow["forum_name"] == '') {
                $type = "Forum";
            }

            $forumparameters = "forum=".$myrow["forum_id"]."&md5=".$myrow["md5"];
            if ($builder != 'builder') {
                $link .= api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Forum&origin=$origin&forumparameters=$forumparameters#$id_in_path";
            } else {
                $link .= "../phpbb/viewforum.php?$forumparameters";
            }
            break;

        case "Thread": //forum post
            //deprecated
            $tbl_topics = $_course['dbNameGlu'].'bb_topics';
            $tbl_posts = $_course['dbNameGlu'].'bb_posts';
            $TBL_FORUMS = $_course['dbNameGlu']."bb_forums";
            $sql = "SELECT * FROM $tbl_topics where topic_id=$id";
            $result = Database::query($sql);
            $myrow = Database::fetch_array($result);

            $sql = "select * from $tbl_learnpath_item where id=$id_in_path";
            $result = Database::query($sql);
            $row = Database::fetch_array($result);

            if ($builder != 'builder') {
                $link .= api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Thread&origin=$origin&topic=".$myrow["topic_id"]."&forum=".$myrow["forum_id"]."&md5=".$myrow["md5"]."#$id_in_path";
            } else {
                $link .= "../phpbb/viewtopic.php?topic=".$myrow["topic_id"]."&forum=".$myrow["forum_id"]."&md5=".$myrow["md5"];
            }
            break;

        case "Post":
            /* todo REVIEW THIS SECTION - NOT USING VALID TABLES ANYMORE
            $tbl_posts       = $_course['dbNameGlu'].'bb_posts';
            $tbl_posts_text  = $_course['dbNameGlu'].'bb_posts_text';
            $TBL_FORUMS = $_course['dbNameGlu']."bb_forums";
            $result= Database::query("SELECT * FROM $tbl_posts where post_id=$id");
            $myrow=Database::fetch_array($result);
            // grabbing the title of the post
            $sql_titel="SELECT * FROM $tbl_posts_text WHERE post_id=".$myrow["post_id"];
            $result_titel=Database::query($sql_titel);
            $myrow_titel=Database::fetch_array($result_titel);

            $sql="select * from $tbl_learnpath_item where id=$id_in_path";
            $result=Database::query($sql);	$row=Database::fetch_array($result);
            if ($row['title'] != '') { $myrow_titel["post_title"]=$row['title']; }
            $desc=$row['description'];
            $link .= str_repeat("&nbsp;&gt;",$level);

            $posternom=$myrow['nom'];				$posterprenom=$myrow['prenom'];
            $posttime=$myrow['post_time'];			$posttext=$myrow_titel['post_text'];
            $posttitle=$myrow_titel['post_title'];
            $posttext = str_replace('"',"'",$posttext);

            if ($builder != 'builder')
            {
                $link .= api_get_self()."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Post&origin=$origin&posternom=$posternom&posterprenom=$posterprenom&posttime=$posttime&posttext=$posttext&posttitle=$posttitle#$id_in_path";
            }
            else
            {
                $link .= "../phpbb/viewtopic.php?topic=".$myrow["topic_id"]."&forum=".$myrow["forum_id"]."&md5=".$myrow["md5"];
            }
            */
            break;

        case "Document":
            $dbTable = Database::get_course_table(TABLE_DOCUMENT, $_course['dbName']);
            $result = Database::query("SELECT * FROM $dbTable WHERE id=$id", __FILE__, __LINE);
            $myrow = Database::fetch_array($result);

            $pathname = explode("/", $myrow["path"]); // making a correct name for the link
            $last = count($pathname) - 1; // making a correct name for the link
            $filename = $pathname[$last]; // making a correct name for the link

            $sql = "select * from $tbl_learnpath_item where id=$id_in_path";
            $result = Database::query($sql);
            $row = Database::fetch_array($result);

            if ($builder != 'builder') {
                $link .= api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Document&origin=$origin&docurl=".$myrow["path"]."#$id_in_path";

            } else {
                $enableDocumentParsing = 'yes';
                if (!$enableDocumentParsing) { //this is the solution for the non-parsing version in the builder
                    $file = urlencode($myrow["path"]);
                    $link .= "../document/showinframes.php?file=$file";
                } else {
                    $link .= "../document/download.php?doc_url=".$myrow["path"];
                }
            }
            break;

        case "Assignments":
            if ($builder != 'builder') {
                $link .= api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Assignments&origin=$origin#$id_in_path";
            } else {
                $link .= "../work/work.php";
            }
            break;
        case "Dropbox":
            if ($builder != 'builder') {
                $link .= api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Dropbox&origin=$origin#$id_in_path";
            } else {
                $link .= "../dropbox/index.php";
            }
            break;
        case "Introduction_text":
            if ($builder != 'builder') {
                $link .= api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Introduction_text&origin=$origin#$id_in_path";
            } else {
                $s = api_get_path(WEB_COURSE_PATH)."$_cid/index.php?intro_cmdEdit=1";
                $link .= $s;
            }
            break;
        case "Course_description":
            if ($builder != 'builder') {
                $link .= api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Course_description&origin=$origin#$id_in_path";
            } else {
                $s = api_get_path(WEB_CODE_PATH)."course_description";
                $link .= $s;
            }
            break;
        case "Groups":

            if ($builder != 'builder') {
                $link .= api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Groups&origin=$origin#$id_in_path";
            } else {
                $link .= "../group/group.php?origin=$origin";
            }
            break;
        case "Users":
            if ($builder != 'builder') {
                $link .= api_get_self(
                )."?action=closelesson&source_forum=".$_GET['source_forum']."&how=complete&id_in_path=$id_in_path&learnpath_id=$learnpath_id&type=Users&origin=$origin#$id_in_path";
            } else {
                $link .= "../user/user.php?origin=$origin";
            }
            break;
    }

    //end huge switch-statement
    return $link;
}

/**
 * This function is to remove an resource item from the array
 */
function remove_resource($resource_key)
{
    $addedresource = $_SESSION['addedresource'];
    $addedresourceid = $_SESSION['addedresourceid'];
    unset($addedresource[$resource_key]);
    unset($addedresourceid[$resource_key]);
    $_SESSION['addedresource'] = $addedresource;
    $_SESSION['addedresourceid'] = $addedresourceid;
}

/**
 * This function is to show the button "click to add resource" on the tool page
 * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
 */
function show_addresource_button($additionalparameters = '')
{
    global $charset;
    echo '<label for="addresources"><img src="../img/attachment.gif" /></label><input class="link_alike" type="submit" name="addresources" id="addresources" value="'.api_htmlentities(
        get_lang('Attachment'),
        ENT_QUOTES,
        $charset
    ).'" '.$additionalparameters.' />';
}

/**
 * this function is to delete ONE specific resource that were added to a specific item
 * Deprecated
 */
/*
function delete_one_added_resource($source_type, $source_id, $resource_type, $resource_id)
{
	//echo "delete_one_added_resource";
	$_course = api_get_course_info();
	$TABLERESOURCE 		= $_course['dbNameGlu']."resource";

	$sql="DELETE FROM $TABLERESOURCE WHERE source_type='$source_type' and source_id='$source_id' and resource_type='$resource_type' and resource_id='$resource_id'";
	Database::query($sql);
}
*/
/**
 * this function is to delete the resources that were added to a specific item
 */
function delete_added_resource($type, $id)
{
    $_course = api_get_course_info();
    $TABLERESOURCE = Database::get_course_table(TABLE_LINKED_RESOURCES, $_course['dbName']);

    $sql = "DELETE FROM $TABLERESOURCE WHERE source_type='$type' and source_id='$id'";
    Database::query($sql);
}

/**
 * this function is te delete all resources of a specific type (only used in announcements -- delete all)
 * Author : Frederik Vermeire <frederik.vermeire@pandora.be>
 */
function delete_all_resources_type($type)
{
    $_course = api_get_course_info();
    $TABLERESOURCE = Database::get_course_table(TABLE_LINKED_RESOURCES, $_course['dbName']);

    $sql = "DELETE FROM $TABLERESOURCE WHERE source_type='$type'";

    Database::query($sql);
}

/**
 * this function checks wether there are added resources or not
 */
function check_added_resources($type, $id)
{
    $_course = api_get_course_info();
    $TABLERESOURCE = Database::get_course_table(TABLE_LINKED_RESOURCES, $_course['dbName']);
    $sql = "SELECT * FROM $TABLERESOURCE WHERE source_type='$type' and source_id='$id'";
    $result = Database::query($sql);
    $number_added = Database::num_rows($result);
    if ($number_added <> 0) {
        return true;
    } else {
        return false;
    }
}


/**
 * this function is to load the resources that were added to a specific item
 * into the session variables
 */
function edit_added_resources($type, $id)
{
    $_course = api_get_course_info();
    $TABLERESOURCE = Database::get_course_table(TABLE_LINKED_RESOURCES, $_course['dbName']);

    $sql = "SELECT * FROM $TABLERESOURCE WHERE source_type='$type' and source_id=$id";
    $result = Database::query($sql);
    while ($row = Database::fetch_array($result)) {
        $addedresource[] = $row["resource_type"];
        $addedresourceid[] = $row["resource_id"];
    }
    $_SESSION['addedresource'] = $addedresource;
    $_SESSION['addedresourceid'] = $addedresourceid;
}

/**
 * this function is store the modified resources
 * first we delete all the added resources in the database,
 * then we add all the resources from the session object.
 */
function update_added_resources($type, $id)
{
    $_course = api_get_course_info();
    $TABLERESOURCE = Database::get_course_table(TABLE_LINKED_RESOURCES, $_course['dbName']);
    // delete all the added resources for this item in the database;
    $sql = "DELETE FROM $TABLERESOURCE WHERE source_type='$type' AND source_id='$id'";
    //echo $sql;
    Database::query($sql);

    // store the resources from the session into the database
    store_resources($type, $id);

    //delete_added_resource_($type, $id);
    unset_session_resources();
}

/**
 * this function is to display the resources that were added to a specific item
 */
function display_added_resources($type, $id, $style = '')
{
    // the array containing the icons
    $arr_icons = array(
        'Agenda' => '../img/agenda.gif',
        'Ad Valvas' => '../img/valves.gif',
        'Link' => '../img/links.gif',
        'Exercise' => '../img/quiz.gif'
    );

    $_course = api_get_course_info();
    global $origin;
    $TABLERESOURCE = Database::get_course_table(TABLE_LINKED_RESOURCES, $_course['dbName']);

    $sql = "SELECT * FROM $TABLERESOURCE WHERE source_type='$type' and source_id='$id'";
    $result = Database::query($sql);
    while ($row = Database::fetch_array($result)) {
        if ($origin != 'learnpath') {
            display_addedresource_link($row['resource_type'], $row['resource_id'], $style);
        } else {
            display_addedresource_link_in_learnpath(
                $row['resource_type'],
                $row['resource_id'],
                'agendaitems',
                '',
                'builder',
                'icon'
            );
            echo "<br>";
        }
    }
}


/**
 * This function is to show the added resources when adding an item
 * $showdeleteimg determine if the delete image should appear or not.
 * deleting an added resource is only possible through the resource linker file itself
 */
function display_resources($showdeleteimg)
{
    global $action;
    global $resourceaction;
    global $id;
    global $locationkey;
    global $source_id, $action, $learnpath_id, $chapter_id, $originalresource;

    if ($resourceaction == "removeresource") {
        /* unneccessary because when editing we delete all the added resources from the
        database and add all these from the session
        if ($action=="edit") // we have an edit and thus we delete from the database and from the session
        {
        echo "remove from database";
        echo $_SESSION['source_type']."/";
        echo $id."/";
        $addedresource=$_SESSION['addedresource'];
        $addedresourceid=$_SESSION['addedresourceid'];
        echo   $addedresource[$key]."/";
        echo   $addedresourceid[$key]."/";
        delete_one_added_resource($_SESSION['source_type'],$id,$addedresource[$key],$addedresourceid[$key]);
        remove_resource($key);
        }
        else // we remove from the session
        {*/
        //echo "remove from session";
        remove_resource($locationkey);
    }
    $addedresource = $_SESSION['addedresource'];
    $addedresourceid = $_SESSION['addedresourceid'];
    if (is_array($addedresource)) {
        echo '<table>';
        foreach ($addedresource as $resource) {
            //echo $resource.":".$addedresourceid[key($addedresource)];
            echo '<tr><td>';
            display_addedresource_link($resource, $addedresourceid[key($addedresource)]);
            echo '</td><td width="30">';

            // if $_SERVER['REQUEST_URI'] contains and ?id=xx we have an edit and the url for deleting a session added resource
            // should also contain this id.
            $test = parse_url($_SERVER['REQUEST_URI']);
            $output = array();
            parse_str($test['query'], $output);

            if ($showdeleteimg == 1) {
                //if (strstr($_SERVER['REQUEST_URI'],"?id="))
                //	{ echo " <a href='".api_get_self()."?id=".$output['id']."&amp;"; }
                //else
                //	{ echo " <a href='".api_get_self()."?"; }
                //action=$action&id=$id&
                //echo "action=$action&amp;id=$id&amp;originalresource=no&amp;resourceaction=removeresource&amp;key=".key($addedresource)."'><img src='../img/delete.gif' border='0' alt='resource ".get_lang('Delete')."' /></a><br />";
                echo "<a href=".api_get_self(
                )."?showresources=true&amp;source_forum=".$_GET['source_forum']."&amp;resourceaction=removeresource&amp;locationkey=".key(
                    $addedresource
                )."&amp;source_id=$source_id&amp;action=$action&amp;learnpath_id=$learnpath_id&amp;chapter_id=$chapter_id&amp;originalresource=no><img src='../img/delete.gif' border='0' alt='resource ".get_lang(
                    'Delete'
                )."' /></a><br />";
            }
            echo '</td></tr>';
            next($addedresource);
            //$_SESSION['edit']=='';
        }
        echo '</table>';
    } else // it is a string
    {
        echo '';
    }
} // end of the display_resources function


/**
 * This function checks wether the link add resource should be displayed next the item in the linker page
 * So we have to check if the specific id of that tool is already in the array of the added resources
 * if it is already in, the link should not be showed since it would make it possible to add
 * the same resource a second time (=duplication of added resources)
 */
function showorhide_addresourcelink($type, $id)
{
    global $from_learnpath, $source_id, $action, $learnpath_id, $chapter_id, $originalresource, $folder, $content, $target;
    //global $_SESSION['addresource'];
    //global $_SESSION['addresourceid'];
    $addedresource = $_SESSION['addedresource'];
    $addedresourceid = $_SESSION['addedresourceid'];

    if (is_array($_SESSION['addedresource'])) {
        foreach ($addedresource as $toolcompare) {
            //echo $toolcompare;
            //echo "/".$type."/".$id."****";
            //$key=key($addedresource);
            //echo $addedresourceid[$key];
            //print_r($addedresourceid);
            //echo "<br>";

            if ($toolcompare == $type and $addedresourceid[key($addedresource)] == $id) {
                $show = 0;
            }
            next($addedresource);
        }
        if ($from_learnpath) {
            $lang_add_it_or_resource = get_lang('AddIt');
        } else {
            $lang_add_it_or_resource = get_lang('AddResource');
        }
        if ($show !== 0) {
            if ($type == "Document") {
                echo "<a href=".api_get_self(
                )."?content=".$type."&folder=".$folder."&source_forum=".$_GET['source_forum']."&add=".$id."&source_id=$source_id&action=$action&learnpath_id=$learnpath_id&chapter_id=$chapter_id&originalresource=no>".$lang_add_it_or_resource."</a>";
            } else {
                echo "<a href='".api_get_self(
                )."?content=".$type."&source_forum=".$_GET['source_forum']."&add=".$id."&source_id=$source_id&action=$action&learnpath_id=$learnpath_id&chapter_id=$chapter_id&originalresource=no&target=$target'>".$lang_add_it_or_resource."</a>";
            }
        }
    } else // if it is not an array, it is a string
    {
        if ($_SESSION['addedresource'] !== $type or $_SESSION['addedresourceid'] !== $id) {
            if ($from_learnpath) {
                $lang_add_it_or_resource = get_lang('AddIt');
            } else {
                $lang_add_it_or_resource = get_lang('AddResource');
            }
            echo "<a href='".api_get_self(
            )."?content=".$type."&folder=".$folder."&source_forum=".$_GET['source_forum']."&add=".$id."&source_id=$source_id&action=$action&learnpath_id=$learnpath_id&chapter_id=$chapter_id&originalresource=no&target=$target'>".$lang_add_it_or_resource."</a>";
        }
    }
}

?>