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

/**
 * This file was originally the copy of document.php, but many modifications happened since then ;
 * the direct file view is not needed anymore, if the user uploads a scorm zip file, a directory
 * will be automatically created for it, and the files will be uncompressed there for example ;
 *
 * @package chamilo.learnpath
 * @author Yannick Warnier <ywarnier@beeznest.org> - redesign
 * @author Denes Nagy, principal author
 * @author Isthvan Mandak, several new features
 * @author Roan Embrechts, code improvements and refactoring
 */
use \ChamiloSession as Session;

$use_anonymous = true;

$_SESSION['whereami'] = 'lp/view';
$this_section = SECTION_COURSES;

if ($lp_controller_touched != 1) {
    header('location: lp_controller.php?action=view&item_id=' . intval($_REQUEST['item_id']));
    exit;
}

require_once '../inc/global.inc.php';

//To prevent the template class
$show_learnpath = true;

api_protect_course_script();

$lp_id = intval($_GET['lp_id']);
$sessionId = api_get_session_id();

// Check if the learning path is visible for student - (LP requisites)

if (!api_is_platform_admin()) {
    if (
        !api_is_allowed_to_edit(null, true) &&
        !learnpath::is_lp_visible_for_student($lp_id, api_get_user_id())
    ) {
        api_not_allowed(true);
    }
}

// Checking visibility (eye icon)
$visibility = api_get_item_visibility(
    api_get_course_info(),
    TOOL_LEARNPATH,
    $lp_id,
    $action,
    api_get_user_id(),
    $sessionId
);
if (!api_is_allowed_to_edit(false, true, false, false) && intval($visibility) == 0) {
    api_not_allowed(true);
}

if (empty($_SESSION['oLP'])) {
    api_not_allowed(true);
}

$debug = 0;

if ($debug) {
    error_log('------ Entering lp_view.php -------');
}

$_SESSION['oLP']->error = '';
$lp_item_id = $_SESSION['oLP']->get_current_item_id();
$lp_type = $_SESSION['oLP']->get_type();

$course_code = api_get_course_id();
$course_id = api_get_course_int_id();
$user_id = api_get_user_id();
$platform_theme = api_get_setting('stylesheets'); // Platform's css.
$my_style = $platform_theme;

$htmlHeadXtra[] = '<script src="' . api_get_path(WEB_LIBRARY_PATH) .
    'javascript/jquery.lp_minipanel.js" type="text/javascript" language="javascript"></script>';
$htmlHeadXtra[] = '<script>
$(document).ready(function() {
    $("div#log_content_cleaner").bind("click", function() {
        $("div#log_content").empty();
    });
});
var chamilo_xajax_handler = window.oxajax;
</script>';

if ($_SESSION['oLP']->mode == 'embedframe' || $_SESSION['oLP']->get_hide_toc_frame() == 1) {
    $htmlHeadXtra[] = 'hello';
}

//Impress js
if ($_SESSION['oLP']->mode == 'impress') {
    $lp_id = $_SESSION['oLP']->get_id();
    $url = api_get_path(WEB_CODE_PATH) . "newscorm/lp_impress.php?lp_id=$lp_id&" . api_get_cidreq();
    header("Location: $url");
    exit;
}

// Prepare variables for the test tool (just in case) - honestly, this should disappear later on.
$_SESSION['scorm_view_id'] = $_SESSION['oLP']->get_view_id();
$_SESSION['scorm_item_id'] = $lp_item_id;

// Reinit exercises variables to avoid spacename clashes (see exercise tool)
if (isset($exerciseResult) || isset($_SESSION['exerciseResult'])) {
    Session::erase('exerciseResult');
    Session::erase('objExercise');
    Session::erase('questionList');
}

// additional APIs
$htmlHeadXtra[] = '<script>
chamilo_courseCode = "' . $course_code . '";
</script>';
// Document API
$htmlHeadXtra[] = '<script src="js/documentapi.js" type="text/javascript" language="javascript"></script>';
// Storage API
$htmlHeadXtra[] = '<script>
var sv_user = \'' . api_get_user_id() . '\';
var sv_course = chamilo_courseCode;
var sv_sco = \'' . intval($_REQUEST['lp_id']) . '\';
</script>'; // FIXME fetch sco and userid from a more reliable source directly in sotrageapi.js
$htmlHeadXtra[] = '<script type="text/javascript" src="js/storageapi.js"></script>';

/**
 * Get a link to the corresponding document.
 */
if ($debug) {
    error_log(" src: $src ");
    error_log(" lp_type: $lp_type ");
}

$get_toc_list = $_SESSION['oLP']->get_toc();
$type_quiz = false;
foreach ($get_toc_list as $toc) {
    if ($toc['id'] == $lp_item_id && $toc['type'] == 'quiz') {
        $type_quiz = true;
    }
}

if (!isset($src)) {
    $src = null;
    switch ($lp_type) {
        case 1:
            $_SESSION['oLP']->stop_previous_item();
            $htmlHeadXtra[] = '<script src="scorm_api.php" type="text/javascript" language="javascript"></script>';
            $prereq_check = $_SESSION['oLP']->prerequisites_match($lp_item_id);
            if ($prereq_check === true) {
                $src = $_SESSION['oLP']->get_link('http', $lp_item_id, $get_toc_list);

                // Prevents FF 3.6 + Adobe Reader 9 bug see BT#794 when calling a pdf file in a LP.
                $file_info = parse_url($src);
                $file_info = pathinfo($file_info['path']);
                if (
                    isset($file_info['extension']) &&
                    api_strtolower(substr($file_info['extension'], 0, 3) == 'pdf')
                ) {
                    $src = api_get_path(WEB_CODE_PATH)
                        . 'newscorm/lp_view_item.php?lp_item_id=' . $lp_item_id
                        . '&' . api_get_cidreq();
                }
                $_SESSION['oLP']->start_current_item(); // starts time counter manually if asset
            } else {
                $src = 'blank.php?error=prerequisites';
            }
            break;
        case 2:
            // save old if asset
            $_SESSION['oLP']->stop_previous_item(); // save status manually if asset
            $htmlHeadXtra[] = '<script src="scorm_api.php" type="text/javascript" language="javascript"></script>';
            $prereq_check = $_SESSION['oLP']->prerequisites_match($lp_item_id);
            if ($prereq_check === true) {
                $src = $_SESSION['oLP']->get_link('http', $lp_item_id, $get_toc_list);
                $_SESSION['oLP']->start_current_item(); // starts time counter manually if asset
            } else {
                $src = 'blank.php?error=prerequisites';
            }
            break;
        case 3:
            // aicc
            $_SESSION['oLP']->stop_previous_item(); // save status manually if asset
            $htmlHeadXtra[] = '<script src="' . $_SESSION['oLP']->get_js_lib()
                . '" type="text/javascript" language="javascript"></script>';
            $prereq_check = $_SESSION['oLP']->prerequisites_match($lp_item_id);
            if ($prereq_check === true) {
                $src = $_SESSION['oLP']->get_link('http', $lp_item_id, $get_toc_list);
                $_SESSION['oLP']->start_current_item(); // starts time counter manually if asset
            } else {
                $src = 'blank.php';
            }
            break;
        case 4:
            break;
    }
}

$autostart = 'true';
// Update status, total_time from lp_item_view table when you finish the exercises in learning path.

if ($debug) {
    error_log('$type_quiz: ' . $type_quiz);
    error_log('$_REQUEST[exeId]: ' . intval($_REQUEST['exeId']));
    error_log('$lp_id: ' . $lp_id);
    error_log('$_GET[lp_item_id]: ' . intval($_GET['lp_item_id']));
}

if (
    !empty($_REQUEST['exeId']) &&
    isset($lp_id) &&
    isset($_GET['lp_item_id'])
) {
    global $src;
    $_SESSION['oLP']->items[$_SESSION['oLP']->current]->write_to_db();

    $TBL_TRACK_EXERCICES = Database::get_main_table(TABLE_STATISTIC_TRACK_E_EXERCISES);
    $TBL_LP_ITEM_VIEW = Database::get_course_table(TABLE_LP_ITEM_VIEW);
    $TBL_LP_ITEM = Database::get_course_table(TABLE_LP_ITEM);
    $safe_item_id = intval($_GET['lp_item_id']);
    $safe_id = $lp_id;
    $safe_exe_id = intval($_REQUEST['exeId']);

    if (
        $safe_id == strval(intval($safe_id)) &&
        $safe_item_id == strval(intval($safe_item_id))
    ) {
        $sql = 'SELECT start_date, exe_date, exe_result, exe_weighting
                FROM ' . $TBL_TRACK_EXERCICES . '
                WHERE exe_id = ' . $safe_exe_id;
        $res = Database::query($sql);
        $row_dates = Database::fetch_array($res);

        $time_start_date = api_strtotime($row_dates['start_date'], 'UTC');
        $time_exe_date = api_strtotime($row_dates['exe_date'], 'UTC');

        $mytime = ((int) $time_exe_date - (int) $time_start_date);
        $score = (float) $row_dates['exe_result'];
        $max_score = (float) $row_dates['exe_weighting'];

        $sql = "UPDATE $TBL_LP_ITEM SET
                    max_score = '$max_score'
                WHERE c_id = $course_id AND id = '" . $safe_item_id . "'";
        Database::query($sql);

        $sql = "SELECT id FROM $TBL_LP_ITEM_VIEW
                WHERE
                    c_id = $course_id AND
                    lp_item_id = '$safe_item_id' AND
                    lp_view_id = '" . $_SESSION['oLP']->lp_view_id . "'
                ORDER BY id DESC
                LIMIT 1";
        $res_last_attempt = Database::query($sql);

        if (Database::num_rows($res_last_attempt) && !api_is_invitee()) {
            $row_last_attempt = Database::fetch_row($res_last_attempt);
            $lp_item_view_id = $row_last_attempt[0];
            $sql = "UPDATE $TBL_LP_ITEM_VIEW SET
                        status = 'completed' ,
                        score = $score,
                        total_time = $mytime
                    WHERE id='" . $lp_item_view_id . "' AND c_id = $course_id ";

            if ($debug) {
                error_log($sql);
            }

            Database::query($sql);

            $sql = "UPDATE $TBL_TRACK_EXERCICES SET
                        orig_lp_item_view_id = $lp_item_view_id
                    WHERE exe_id = " . $safe_exe_id;
            Database::query($sql);
        }
    }
    if (intval($_GET['fb_type']) > 0) {
        $src = 'blank.php?msg=exerciseFinished';
    } else {
        $src = api_get_path(WEB_CODE_PATH) . 'exercice/result.php?origin=learnpath&id=' . $safe_exe_id;

        if ($debug) {
            error_log('Calling URL: ' . $src);
        }
    }
    $autostart = 'false';
}

$_SESSION['oLP']->set_previous_item($lp_item_id);
$nameTools = Security::remove_XSS($_SESSION['oLP']->get_name());

$save_setting = api_get_setting('show_navigation_menu');
global $_setting;
$_setting['show_navigation_menu'] = 'false';
$scorm_css_header = true;
$lp_theme_css = $_SESSION['oLP']->get_theme(); // Sets the css theme of the LP this call is also use at the frames (toc, nav, message).

if ($_SESSION['oLP']->mode == 'fullscreen') {
    $htmlHeadXtra[] = "<script>window.open('$src','content_id','toolbar=0,location=0,status=0,scrollbars=1,resizable=1');</script>";
}

// Not in fullscreen mode.
// Check if audio recorder needs to be in studentview.
if (isset($_SESSION['status']) && $_SESSION['status'][$course_code] == 5) {
    $audio_recorder_studentview = true;
} else {
    $audio_recorder_studentview = false;
}

// Set flag to ensure lp_header.php is loaded by this script (flag is unset in lp_header.php).
$_SESSION['loaded_lp_view'] = true;

$display_none = '';
$margin_left = '340px';

//Media player code

$display_mode = $_SESSION['oLP']->mode;
$scorm_css_header = true;
$lp_theme_css = $_SESSION['oLP']->get_theme();

// Setting up the CSS theme if exists.
if (!empty($lp_theme_css) && !empty($mycourselptheme) && $mycourselptheme != -1 && $mycourselptheme == 1) {
    global $lp_theme_css;
} else {
    $lp_theme_css = $my_style;
}

$progress_bar = "";
if (!api_is_invitee()) {
    $progress_bar = $_SESSION['oLP']->getProgressBar();
}
$navigation_bar = $_SESSION['oLP']->get_navigation_bar();
$navigation_bar_bottom = $_SESSION['oLP']->get_navigation_bar("control-bottom", "display:none");
$mediaplayer = $_SESSION['oLP']->get_mediaplayer($autostart);

$tbl_lp_item = Database::get_course_table(TABLE_LP_ITEM);
$show_audioplayer = false;
// Getting all the information about the item.
$sql = "SELECT audio FROM " . $tbl_lp_item . "
        WHERE c_id = $course_id AND lp_id = '" . $_SESSION['oLP']->lp_id . "'";
$res_media = Database::query($sql);

if (Database::num_rows($res_media) > 0) {
    while ($row_media = Database::fetch_array($res_media)) {
        if (!empty($row_media['audio'])) {
            $show_audioplayer = true;
            break;
        }
    }
}

$is_allowed_to_edit = api_is_allowed_to_edit(false, true, true, false);

$breadcrumb = null;

if ($is_allowed_to_edit) {
    global $interbreadcrumb;
    $interbreadcrumb[] = array(
        'url' => 'lp_controller.php?action=list&isStudentView=false',
        'name' => get_lang('LearningPaths')
    );
    $interbreadcrumb[] = array(
        'url' => api_get_self() . "?action=add_item&type=step&lp_id={$_SESSION['oLP']->lp_id}&isStudentView=false",
        'name' => $_SESSION['oLP']->get_name()
    );
    $interbreadcrumb[] = array(
        'url' => '#',
        'name' => get_lang('Preview')
    );
    $breadcrumb = return_breadcrumb($interbreadcrumb, null, null);
}

// Return to course home.
if ($is_allowed_to_edit) {
    $buttonHomeUrl = 'lp_controller.php?' . api_get_cidreq() . '&' . http_build_query([
        'isStudentView' => 'false',
        'action' => 'return_to_course_homepage'
    ]);
} else {
    $buttonHomeUrl = 'lp_controller.php?' . api_get_cidreq() . '&' . http_build_query([
        'action' => 'return_to_course_homepage'
    ]);
}

$buttonHomeText = get_lang('CourseHomepageLink');
// Return to lp list
if (api_get_course_setting('lp_return_link') == 1) {
    $buttonHomeUrl .= '&redirectTo=lp_list';
    $buttonHomeText = get_lang('LearningPathList');
}

$lpPreviewImagePath = 'unknown.png';

if ($_SESSION['oLP']->get_preview_image()) {
    $lpPreviewImagePath = $_SESSION['oLP']->get_preview_image_path();
}

$gamificationMode = api_get_setting('gamification_mode');

$template = new Template('title', false, false, true, true, false);
$template->assign('glossary_extra_tools', api_get_setting('show_glossary_in_extra_tools'));
$template->assign(
    'glossary_tool_availables',
    ['true', 'lp', 'exercise_and_lp']
);
$template->assign('show_glossary_in_documents', api_get_setting('show_glossary_in_documents'));
$template->assign('jquery_web_path', api_get_jquery_web_path());
$template->assign('jquery_ui_js_web_path', api_get_jquery_ui_js_web_path());
$template->assign('jquery_ui_css_web_path', api_get_jquery_ui_css_web_path());
$template->assign('is_allowed_to_edit', $is_allowed_to_edit);
$template->assign('gamification_mode', $gamificationMode);
$template->assign('breadcrumb', $breadcrumb);
$template->assign('button_home_url', $buttonHomeUrl);
$template->assign('button_home_text', $buttonHomeText);
$template->assign('navigation_bar', $navigation_bar);
$template->assign('progress_bar', $progress_bar);
$template->assign('show_audio_player', $show_audioplayer);
$template->assign('media_player', $mediaplayer);
$template->assign('toc_list', $get_toc_list);
$template->assign('iframe_src', $src);
$template->assign('navigation_bar_bottom', $navigation_bar_bottom);

if ($gamificationMode == 1) {
    $template->assign(
        'gamification_stars',
        $_SESSION['oLP']->getCalculateStars($sessionId)
    );
    $template->assign(
        'gamification_points',
        $_SESSION['oLP']->getCalculateScore($sessionId)
    );
}

$template->assign(
    'lp_preview_image',
    Display::img(
        $lpPreviewImagePath,
        $_SESSION['oLP']->name,
        array('class' => 'img-circle'),
        ICON_SIZE_BIG
    )
);

$template->assign('lp_author', $_SESSION['oLP']->get_author());
$template->assign('lp_mode', $_SESSION['oLP']->mode);
$template->assign('lp_title_scorm',$_SESSION['oLP']->name);
$template->assign(
    'lp_html_toc',
    $_SESSION['oLP']->get_html_toc($get_toc_list)
);
$template->assign('lp_id', $_SESSION['oLP']->lp_id);
$template->assign('lp_current_item_id', $_SESSION['oLP']->get_current_item_id());

$content = $template->fetch('default/learnpath/view.tpl');

$template->assign('content', $content);
$template->display_no_layout_template();

// Restore a global setting.
$_setting['show_navigation_menu'] = $save_setting;

if ($debug) {
    error_log(' ------- end lp_view.php ------');
}
