chamilo-lms/main/newscorm/lp_controller.php

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

/**
 * Controller script. Prepares the common background variables to give to the scripts corresponding to
 * the requested action
 * @package chamilo.learnpath
 * @author Yannick Warnier <ywarnier@beeznest.org>
 */

use \ChamiloSession as Session;

$debug = 0;
if ($debug > 0) error_log('New LP -+- Entered lp_controller.php -+- (action: '.$_REQUEST['action'].')', 0);

// Language files that needs to be included.
if (isset($_GET['action'])) {
    if ($_GET['action'] == 'export') {
        // Only needed on export.
        $language_file[] = 'hotspot';
    }
}
$language_file[] = 'course_home';
$language_file[] = 'scormdocument';
$language_file[] = 'document';
$language_file[] = 'scorm';
$language_file[] = 'learnpath';
$language_file[] = 'resourcelinker';
$language_file[] = 'registration';
$language_file[] = 'exercice';

// Including the global initialization file.
require_once '../inc/global.inc.php';
$current_course_tool  = TOOL_LEARNPATH;

if (api_get_setting('show_glossary_in_documents') == 'ismanual' || api_get_setting('show_glossary_in_documents') == 'isautomatic' ) {
    $htmlHeadXtra[] = '<script type="text/javascript">
<!--
    var jQueryFrameReadyConfigPath = \''.api_get_path(WEB_LIBRARY_PATH).'javascript/jquery.min.js\';
-->
</script>';
    $htmlHeadXtra[] = '<script src="'.api_get_path(WEB_LIBRARY_PATH).'javascript/jquery.frameready.js" type="text/javascript" language="javascript"></script>';
    $htmlHeadXtra[] = '<script src="'.api_get_path(WEB_LIBRARY_PATH).'javascript/jquery.highlight.js" type="text/javascript" language="javascript"></script>';
}

$htmlHeadXtra[] = '<script type="text/javascript">
function setFocus(){
    $("#idTitle").focus();
}
$(window).load(function () {
    setFocus();
});
</script>
<style>

form .label {
    padding: 1px 3px 2px;
    font-size: 100%;
    font-weight: normal;
    color: #ffffff;
    text-transform: none;
    background: none;
    border-radius: none;
    color: #404040;
    float: left;
    line-height: 18px;
    padding-top: 6px;
    text-align: right;
    width: 150px;
    text-shadow:none;
}
</style>';

// Flag to allow for anonymous user - needs to be set before global.inc.php.
$use_anonymous = true;

// Include class definitions before session_start() to ensure availability when touching
// session vars containing learning paths.
require_once 'learnpath.class.php';
if ($debug > 0) error_log('New LP - Included learnpath', 0);
require_once 'learnpathItem.class.php';
if ($debug > 0) error_log('New LP - Included learnpathItem', 0);
require_once 'scorm.class.php';
if ($debug > 0) error_log('New LP - Included scorm', 0);
require_once 'scormItem.class.php';
if ($debug > 0) error_log('New LP - Included scormItem', 0);
require_once 'aicc.class.php';
if ($debug > 0) error_log('New LP - Included aicc', 0);
require_once 'aiccItem.class.php';
if ($debug > 0) error_log('New LP - Included aiccItem', 0);

require_once 'back_compat.inc.php';
if ($debug > 0) error_log('New LP - Included back_compat', 0);

$session_id = api_get_session_id();

api_protect_course_script(true);

/*if (!$is_allowed_in_course) {
    api_not_allowed(true);
}*/

require_once api_get_path(LIBRARY_PATH).'fckeditor/fckeditor.php';
$lpfound = false;

$myrefresh = 0;
$myrefresh_id = 0;
if (!empty($_SESSION['refresh']) && $_SESSION['refresh'] == 1) {
    // Check if we should do a refresh of the oLP object (for example after editing the LP).
    // If refresh is set, we regenerate the oLP object from the database (kind of flush).
    Session::erase('refresh');
    $myrefresh = 1;
    if ($debug > 0) error_log('New LP - Refresh asked', 0);
}
if ($debug > 0) error_log('New LP - Passed refresh check', 0);

if (!empty($_REQUEST['dialog_box'])) {
    $dialog_box = stripslashes(urldecode($_REQUEST['dialog_box']));
}

$lp_controller_touched = 1;
$lp_found = false;

if (isset($_SESSION['lpobject'])) {
    if ($debug > 0) error_log('New LP - SESSION[lpobject] is defined', 0);
    $oLP = unserialize($_SESSION['lpobject']);
    if (isset($oLP) && is_object($oLP)) {
        if ($debug > 0) error_log('New LP - oLP is object', 0);
        if ($myrefresh == 1 OR (empty($oLP->cc)) OR $oLP->cc != api_get_course_id() OR $oLP->lp_view_session_id != $session_id) {
            if ($debug > 0) error_log('New LP - Course has changed, discard lp object', 0);
            if ($myrefresh == 1) { $myrefresh_id = $oLP->get_id(); }
            $oLP = null;
            Session::erase('oLP');
            Session::erase('lpobject');
        } else {
            $_SESSION['oLP'] = $oLP;
            $lp_found = true;
        }
    }
}

$course_id = api_get_course_int_id();

if ($debug>0) error_log('New LP - Passed data remains check', 0);

if (!$lp_found || (!empty($_REQUEST['lp_id']) && $_SESSION['oLP']->get_id() != $_REQUEST['lp_id'])) {
    if ($debug > 0) error_log('New LP - oLP is not object, has changed or refresh been asked, getting new', 0);
    // Regenerate a new lp object? Not always as some pages don't need the object (like upload?)
    if (!empty($_REQUEST['lp_id']) || !empty($myrefresh_id)) {
        if ($debug > 0) error_log('New LP - lp_id is defined', 0);
        // Select the lp in the database and check which type it is (scorm/dokeos/aicc) to generate the
        // right object.
        $lp_table = Database::get_course_table(TABLE_LP_MAIN);
        if (!empty($_REQUEST['lp_id'])) {
            $lp_id = $_REQUEST['lp_id'];
        } else {
            $lp_id = $myrefresh_id;
        }
        if (is_numeric($lp_id)) {
            $lp_id = Database::escape_string($lp_id);
            $sel = "SELECT * FROM $lp_table WHERE c_id = $course_id AND id = $lp_id";

            if ($debug > 0) error_log('New LP - querying '.$sel, 0);
            $res = Database::query($sel);
            if (Database::num_rows($res)) {
                $row = Database::fetch_array($res);
                $type = $row['lp_type'];
                if ($debug > 0) error_log('New LP - found row - type '.$type. ' - Calling constructor with '.api_get_course_id().' - '.$lp_id.' - '.api_get_user_id(), 0);
                switch ($type) {
                    case 1:
                if ($debug > 0) error_log('New LP - found row - type dokeos - Calling constructor with '.api_get_course_id().' - '.$lp_id.' - '.api_get_user_id(), 0);
                        $oLP = new learnpath(api_get_course_id(),$lp_id,api_get_user_id());
                        if ($oLP !== false) { $lp_found = true; } else { eror_log($oLP->error, 0); }
                        break;
                    case 2:
                if ($debug > 0) error_log('New LP - found row - type scorm - Calling constructor with '.api_get_course_id().' - '.$lp_id.' - '.api_get_user_id(), 0);
                        $oLP = new scorm(api_get_course_id(),$lp_id,api_get_user_id());
                        if ($oLP !== false) { $lp_found = true; } else { eror_log($oLP->error, 0); }
                        break;
                    case 3:
                if ($debug > 0) error_log('New LP - found row - type aicc - Calling constructor with '.api_get_course_id().' - '.$lp_id.' - '.api_get_user_id(), 0);
                        $oLP = new aicc(api_get_course_id(),$lp_id,api_get_user_id());
                        if ($oLP !== false) { $lp_found = true; } else { eror_log($oLP->error, 0); }
                        break;
                    default:
                if ($debug > 0) error_log('New LP - found row - type other - Calling constructor with '.api_get_course_id().' - '.$lp_id.' - '.api_get_user_id(), 0);
                        $oLP = new learnpath(api_get_course_id(),$lp_id,api_get_user_id());
                        if ($oLP !== false) { $lp_found = true; } else { eror_log($oLP->error, 0); }
                        break;
                }
            }
        } else {
            if ($debug > 0) error_log('New LP - Request[lp_id] is not numeric', 0);
        }


    } else {
        if ($debug > 0) error_log('New LP - Request[lp_id] and refresh_id were empty', 0);
    }
    if ($lp_found) {
        $_SESSION['oLP'] = $oLP;
    }
}
if ($debug > 0) error_log('New LP - Passed oLP creation check', 0);


/**
 * Actions switching
 */
$_SESSION['oLP']->update_queue = array(); // Reinitialises array used by javascript to update items in the TOC.
$_SESSION['oLP']->message = ''; // Should use ->clear_message() method but doesn't work.

if (isset($_GET['isStudentView']) && $_GET['isStudentView'] == 'true') {
    if ($_REQUEST['action'] != 'list' AND $_REQUEST['action'] != 'view') {
        if (!empty($_REQUEST['lp_id'])) {
            $_REQUEST['action'] = 'view';
        } else {
            $_REQUEST['action'] = 'list';
        }
    }
}

$is_allowed_to_edit = api_is_allowed_to_edit(null, true);

$action = (!empty($_REQUEST['action']) ? $_REQUEST['action'] : '');

switch ($action) {
    case 'add_item':
        if (!$is_allowed_to_edit) {
            api_not_allowed(true);
        }
        if ($debug > 0) error_log('New LP - add item action triggered', 0);

        if (!$lp_found) {
            //check if the learnpath ID was defined, otherwise send back to list
            if ($debug > 0) error_log('New LP - No learnpath given for add item', 0);
            require 'lp_list.php';
        } else {
            $_SESSION['refresh'] = 1;

            if (isset($_POST['submit_button']) && !empty($_POST['title'])) {
                // If a title was sumbitted:

                //Updating the lp.modified_on
                $_SESSION['oLP']->set_modified_on();

                if (isset($_SESSION['post_time']) && $_SESSION['post_time'] == $_POST['post_time']) {
                    // Check post_time to ensure ??? (counter-hacking measure?)
                    require 'lp_add_item.php';
                } else {

                    $_SESSION['post_time'] = $_POST['post_time'];
                    if ($_POST['type'] == TOOL_DOCUMENT) {
                        if (isset($_POST['path']) && $_GET['edit'] != 'true') {
                            $document_id = $_POST['path'];
                        } else {
                            $document_id = $_SESSION['oLP']->create_document($_course);
                        }
                        $new_item_id = $_SESSION['oLP']->add_item($_POST['parent'], $_POST['previous'], $_POST['type'], $document_id, $_POST['title'], $_POST['description'], $_POST['prerequisites']);
                    } else {
                        // For all other item types than documents, load the item using the item type and path rather than its ID.
                        $new_item_id = $_SESSION['oLP']->add_item($_POST['parent'], $_POST['previous'], $_POST['type'], $_POST['path'], $_POST['title'], $_POST['description'], $_POST['prerequisites'], $_POST['maxTimeAllowed']);
                    }
                    // Display.
                    require 'lp_add_item.php';
                }
            } else {
                require 'lp_add_item.php';
            }
        }
        break;
    case 'add_audio':
        if (!$is_allowed_to_edit) {
            api_not_allowed(true);
        }
        if ($debug > 0) error_log('New LP - add audio action triggered', 0);

        if (!$lp_found) {
            //check if the learnpath ID was defined, otherwise send back to list
            if ($debug > 0) error_log('New LP - No learnpath given for add audio', 0);
            require 'lp_list.php';
        } else {
            $_SESSION['refresh'] = 1;           

            if (isset($_REQUEST['id'])) {                
                $lp_item_obj = new learnpathItem($_REQUEST['id']);
                
                //Remove audio
                if (isset($_POST['delete_file']) && $_POST['delete_file'] == 1) {
                     $lp_item_obj->remove_audio();                    
                }
                
                //Upload audio
                if (isset($_FILES['file']) && !empty($_FILES['file'])) {
                    //Updating the lp.modified_on
                    $_SESSION['oLP']->set_modified_on();                    
                    $lp_item_obj->add_audio();
                }
                
                //Add audio file from documents
                if (isset($_REQUEST['document_id']) && !empty($_REQUEST['document_id'])) {
                    $_SESSION['oLP']->set_modified_on();                    
                    $lp_item_obj->add_audio_from_documents($_REQUEST['document_id']);
                }

                // Display.
                require 'lp_add_audio.php';                
            } else {
                require 'lp_add_audio.php';
            }
        }
        break;           
    case 'add_lp':
        if (!$is_allowed_to_edit) {
            api_not_allowed(true);
        }
        if ($debug > 0) error_log('New LP - add_lp action triggered', 0);
        $_REQUEST['lp_name'] = trim($_REQUEST['lp_name']);
        if (!empty($_REQUEST['lp_name'])) {
            $_SESSION['refresh'] = 1;

            if (isset($_SESSION['post_time']) && $_SESSION['post_time'] == $_REQUEST['post_time']) {
                require 'lp_add.php';
            } else {
                $_SESSION['post_time'] = $_REQUEST['post_time'];

                if (isset($_REQUEST['activate_start_date_check']) && $_REQUEST['activate_start_date_check'] == 1) {
                	$publicated_on  = $_REQUEST['publicated_on'];
                	$publicated_on  = $publicated_on['Y'].'-'.$publicated_on['F'].'-'.$publicated_on['d'].' '.$publicated_on['H'].':'.$publicated_on['i'].':00';
                } else {
                	$publicated_on = null;
                }

                if (isset($_REQUEST['activate_end_date_check']) && $_REQUEST['activate_end_date_check'] == 1) {
                	$expired_on   = $_REQUEST['expired_on'];
                	$expired_on   = $expired_on['Y'].'-'.$expired_on['F'].'-'.$expired_on['d'].' '.$expired_on['H'].':'.$expired_on['i'].':00';
                } else {
                	$expired_on   = null;
                }

                $new_lp_id = learnpath::add_lp(api_get_course_id(), Security::remove_XSS($_REQUEST['lp_name']), '', 'chamilo', 'manual', '', $publicated_on, $expired_on);

                if (is_numeric($new_lp_id)) {
                    // TODO: Maybe create a first module directly to avoid bugging the user with useless queries
                    $_SESSION['oLP'] = new learnpath(api_get_course_id(),$new_lp_id,api_get_user_id());
                    require 'lp_build.php';
                }
            }
        } else {
            require 'lp_add.php';
        }

        break;

    case 'admin_view':
        if (!$is_allowed_to_edit) {
            api_not_allowed(true);
        }
        if ($debug > 0) error_log('New LP - admin_view action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for admin_view', 0); require 'lp_list.php'; }
        else {
            $_SESSION['refresh'] = 1;
            require 'lp_admin_view.php';
        }
        break;

    case 'auto_launch':
        if (api_get_course_setting('enable_lp_auto_launch') == 1) { //Redirect to a specific LP
            if (!$is_allowed_to_edit) {
                api_not_allowed(true);
            }
            if ($debug > 0) error_log('New LP - export action triggered', 0);
            if (!$lp_found) { error_log('New LP - No learnpath given for set_autolunch', 0); require 'lp_list.php'; }
            else {
                $_SESSION['oLP']->set_autolunch($_GET['lp_id'], $_GET['status']);
                require 'lp_list.php';
                exit;
            }
        }
        break;
    case 'build':
        if (!$is_allowed_to_edit) {
            api_not_allowed(true);
        }
        if ($debug > 0) error_log('New LP - build action triggered', 0);

        if (!$lp_found) { error_log('New LP - No learnpath given for build', 0); require 'lp_list.php'; }
        else {
            $_SESSION['refresh'] = 1;
            require 'lp_build.php';
        }
        break;
    case 'edit_item':
        if (!$is_allowed_to_edit) {
            api_not_allowed(true);
        }
        if ($debug > 0) error_log('New LP - edit item action triggered', 0);

        if (!$lp_found) { error_log('New LP - No learnpath given for edit item', 0); require 'lp_list.php'; }
        else {
            $_SESSION['refresh'] = 1;
            if (isset($_POST['submit_button']) && !empty($_POST['title'])) {

                //Updating the lp.modified_on
                $_SESSION['oLP']->set_modified_on();

                //$_SESSION['oLP']->edit_item($_GET['id'], $_POST['parent'], $_POST['previous'], $_POST['title'], $_POST['description'], $_POST['prerequisites']);
                // TODO: mp3 edit
                $audio = array();
                
                if (isset($_FILES['mp3'])) $audio = $_FILES['mp3'];
                
                $_SESSION['oLP']->edit_item($_GET['id'], $_POST['parent'], $_POST['previous'], $_POST['title'], $_POST['description'], $_POST['prerequisites'], $audio, $_POST['maxTimeAllowed']);

                if (isset($_POST['content_lp'])) {
                    $_SESSION['oLP']->edit_document($_course);
                }
                $is_success = true;
            }
            if (isset($_GET['view']) && $_GET['view'] == 'build') {
                require 'lp_edit_item.php';
            } else {
                require 'lp_admin_view.php';
            }
        }
        break;

    case 'edit_item_prereq':
        if (!$is_allowed_to_edit) {
            api_not_allowed(true);
        }
        if ($debug > 0) error_log('New LP - edit item prereq action triggered', 0);

        if (!$lp_found) { error_log('New LP - No learnpath given for edit item prereq', 0); require 'lp_list.php'; }
        else {
            if (isset($_POST['submit_button'])) {
                //Updating the lp.modified_on
                $_SESSION['oLP']->set_modified_on();

                $_SESSION['refresh'] = 1;
                $_SESSION['oLP']->edit_item_prereq($_GET['id'], $_POST['prerequisites'], $_POST['min_' . $_POST['prerequisites']], $_POST['max_' . $_POST['prerequisites']]);
            }
            require 'lp_edit_item_prereq.php';
        }
        break;

    case 'move_item':
        if (!$is_allowed_to_edit) {
            api_not_allowed(true);
        }
        if ($debug > 0) error_log('New LP - move item action triggered', 0);

        if (!$lp_found) { error_log('New LP - No learnpath given for move item', 0); require 'lp_list.php'; }
        else {
            $_SESSION['refresh'] = 1;
            if (isset($_POST['submit_button'])) {
                //Updating the lp.modified_on
                $_SESSION['oLP']->set_modified_on();

                $_SESSION['oLP']->edit_item($_GET['id'], $_POST['parent'], $_POST['previous'], $_POST['title'], $_POST['description']);
                $is_success = true;
            }
            if (isset($_GET['view']) && $_GET['view'] == 'build') {
                require 'lp_move_item.php';
            } else {
                // Avoids weird behaviours see CT#967.
                $check = Security::check_token('get');
                if ($check) {
                    $_SESSION['oLP']->move_item($_GET['id'], $_GET['direction']);
                }
                Security::clear_token();
                require 'lp_admin_view.php';
            }
        }
        break;
    case 'view_item':
        if (!$is_allowed_to_edit) {
            api_not_allowed(true);
        }
        if ($debug > 0) error_log('New LP - view_item action triggered', 0);
        if (!$lp_found) {
            error_log('New LP - No learnpath given for view item', 0); require 'lp_list.php';
        } else {
            $_SESSION['refresh'] = 1;
            require 'lp_view_item.php';
        }
        break;
    case 'upload':
        if (!$is_allowed_to_edit) {
            api_not_allowed(true);
        }
        if ($debug > 0) error_log('New LP - upload action triggered', 0);
        $cwdir = getcwd();
        require 'lp_upload.php';
        // Reinit current working directory as many functions in upload change it.
        chdir($cwdir);
        require 'lp_list.php';
        break;

    case 'copy':
        if (!$is_allowed_to_edit) {
            api_not_allowed(true);
        }
        if ($debug > 0) error_log('New LP - export action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for copy', 0); require 'lp_list.php'; }
        else {
            $_SESSION['oLP']->copy();
        }
        require 'lp_list.php';
        break;
    case 'export':
        if (!$is_allowed_to_edit) {
            api_not_allowed(true);
        }
        if ($debug > 0) error_log('New LP - export action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for export', 0); require 'lp_list.php'; }
        else {
            $_SESSION['oLP']->scorm_export();
            exit();
            //require 'lp_list.php';
        }
        break;
    case 'export_to_pdf':

        if (!learnpath::is_lp_visible_for_student($_SESSION['oLP']->lp_id, api_get_user_id())) {
            api_not_allowed();
        }
        if ($debug > 0) error_log('New LP - export action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for export_to_pdf', 0); require 'lp_list.php';
        } else {
            $result = $_SESSION['oLP']->scorm_export_to_pdf($_GET['lp_id']);
            if (!$result) {
                require 'lp_list.php';
            }
            exit;
        }
        break;
    case 'delete':
        if (!$is_allowed_to_edit) {
            api_not_allowed(true);
        }
        if ($debug > 0) error_log('New LP - delete action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for delete', 0); require 'lp_list.php'; }
        else {
            $_SESSION['refresh'] = 1;
            // Remove lp from homepage if it is there.
            //$_SESSION['oLP']->toggle_visibility((int)$_GET['lp_id'],'i');
            $_SESSION['oLP']->delete(null,(int)$_GET['lp_id'],'remove');
            Session::erase('oLP');
            require 'lp_list.php';
        }
        break;

    case 'toggle_visible': // Change lp visibility (inside lp tool).
        if (!$is_allowed_to_edit) {
            api_not_allowed(true);
        }
        if ($debug > 0) error_log('New LP - visibility action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for visibility', 0); require 'lp_list.php'; }
        else {
            learnpath::toggle_visibility($_REQUEST['lp_id'], $_REQUEST['new_status']);
            require 'lp_list.php';
        }
        break;

    case 'toggle_publish': // Change lp published status (visibility on homepage).
        if (!$is_allowed_to_edit) {
            api_not_allowed(true);
        }
        if ($debug > 0) error_log('New LP - publish action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for publish', 0); require 'lp_list.php'; }
        else {
            learnpath::toggle_publish($_REQUEST['lp_id'],$_REQUEST['new_status']);
            require 'lp_list.php';
        }
        break;

    case 'move_lp_up': // Change lp published status (visibility on homepage)
        if (!$is_allowed_to_edit) {
            api_not_allowed(true);
        }
        if ($debug > 0) error_log('New LP - publish action triggered', 0);
        if (!$lp_found) {
            error_log('New LP - No learnpath given for publish', 0);
            require 'lp_list.php';
        } else {
            learnpath::move_up($_REQUEST['lp_id']);
            require 'lp_list.php';
        }
        break;

    case 'move_lp_down': //change lp published status (visibility on homepage)
        if (!$is_allowed_to_edit) {
            api_not_allowed(true);
        }
        if ($debug > 0) error_log('New LP - publish action triggered', 0);
        if (!$lp_found) {
            error_log('New LP - No learnpath given for publish', 0);
            require 'lp_list.php';
        } else {
            learnpath::move_down($_REQUEST['lp_id']);
            require 'lp_list.php';
        }
        break;

    case 'edit':
        if (!$is_allowed_to_edit) {
            api_not_allowed(true);
        }
        if ($debug > 0) error_log('New LP - edit action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for edit', 0); require 'lp_list.php'; }
        else {
            $_SESSION['refresh'] = 1;
            require 'lp_edit.php';
        }
        break;

    case 'update_lp':
        if (!$is_allowed_to_edit) {
            api_not_allowed(true);
        }
        if ($debug > 0) error_log('New LP - update_lp action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for edit', 0); require 'lp_list.php'; }
        else {
            $_SESSION['refresh'] = 1;
            $lp_name = Security::remove_XSS($_REQUEST['lp_name']);
            $_SESSION['oLP']->set_name($lp_name);
            $author = $_REQUEST['lp_author'];
            // Fixing the author name (no body or html tags).
            $auth_init = stripos($author, '<p>');
            if ($auth_init === false) {
                $auth_init = stripos($author, '<body>');
                $auth_end = $auth_init + stripos(substr($author, $auth_init + 6), '</body>') + 7;
                $len = $auth_end - $auth_init + 6;
            } else {
                $auth_end = strripos($author, '</p>');
                $len = $auth_end - $auth_init + 4;
            }

            $author_fixed = substr($author, $auth_init, $len);
            //$author_fixed = $author;

            $_SESSION['oLP']->set_author($author_fixed);
            $_SESSION['oLP']->set_encoding($_REQUEST['lp_encoding']);  // TODO (as of Chamilo 1.8.8): Check in the future whether this field is needed.
            $_SESSION['oLP']->set_maker($_REQUEST['lp_maker']);
            $_SESSION['oLP']->set_proximity($_REQUEST['lp_proximity']);
            $_SESSION['oLP']->set_theme($_REQUEST['lp_theme']);
			$_SESSION['oLP']->set_hide_toc_frame($_REQUEST['hide_toc_frame']);
            $_SESSION['oLP']->set_prerequisite($_REQUEST['prerequisites']);
            $_SESSION['oLP']->set_use_max_score($_REQUEST['use_max_score']);


            if (isset($_REQUEST['activate_start_date_check']) && $_REQUEST['activate_start_date_check'] == 1) {
            	$publicated_on  = $_REQUEST['publicated_on'];
            	$publicated_on  = $publicated_on['Y'].'-'.$publicated_on['F'].'-'.$publicated_on['d'].' '.$publicated_on['H'].':'.$publicated_on['i'].':00';
            } else {
            	$publicated_on = null;
            }

            if (isset($_REQUEST['activate_end_date_check']) && $_REQUEST['activate_end_date_check'] == 1) {
            	$expired_on   = $_REQUEST['expired_on'];
            	$expired_on   = $expired_on['Y'].'-'.$expired_on['F'].'-'.$expired_on['d'].' '.$expired_on['H'].':'.$expired_on['i'].':00';
            } else {
            	$expired_on   = null;
            }

            $_SESSION['oLP']->set_modified_on();
            $_SESSION['oLP']->set_publicated_on($publicated_on);
            $_SESSION['oLP']->set_expired_on($expired_on);

            if ($_REQUEST['remove_picture']) {
                $_SESSION['oLP']->delete_lp_image();
            }

            if ($_FILES['lp_preview_image']['size'] > 0)
                $_SESSION['oLP']->upload_image($_FILES['lp_preview_image']);

            if (api_get_setting('search_enabled') === 'true') {
                require_once api_get_path(LIBRARY_PATH).'specific_fields_manager.lib.php';
                $specific_fields = get_specific_field_list();
                foreach ($specific_fields as $specific_field) {
                    $_SESSION['oLP']->set_terms_by_prefix($_REQUEST[$specific_field['code']], $specific_field['code']);
                    $new_values = explode(',', trim($_REQUEST[$specific_field['code']]));
                    if (!empty($new_values)) {
                        array_walk($new_values, 'trim');
                        delete_all_specific_field_value(api_get_course_id(), $specific_field['id'], TOOL_LEARNPATH, $_SESSION['oLP']->lp_id);

                        foreach ($new_values as $value) {
                            if (!empty($value)) {
                                add_specific_field_value($specific_field['id'], api_get_course_id(), TOOL_LEARNPATH, $_SESSION['oLP']->lp_id, $value);
                            }
                        }
                    }
                }
            }
            require 'lp_build.php';
        }
        break;

    case 'add_sub_item': // Add an item inside a chapter.
        if (!$is_allowed_to_edit) {
            api_not_allowed(true);
        }
        if ($debug > 0) error_log('New LP - add sub item action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for add sub item', 0); require 'lp_list.php'; }
        else {
            $_SESSION['refresh'] = 1;
            if (!empty($_REQUEST['parent_item_id'])) {
                $_SESSION['from_learnpath']='yes';
                $_SESSION['origintoolurl'] = 'lp_controller.php?action=admin_view&lp_id='.Security::remove_XSS($_REQUEST['lp_id']);
                require 'resourcelinker.php';
                //$_SESSION['oLP']->add_sub_item($_REQUEST['parent_item_id'], $_REQUEST['previous'], $_REQUEST['type'], $_REQUEST['path'], $_REQUEST['title']);
            } else {
                require 'lp_admin_view.php';
            }
        }
        break;
    case 'deleteitem':
    case 'delete_item':
        if (!$is_allowed_to_edit) {
            api_not_allowed(true);
        }
        if ($debug > 0) error_log('New LP - delete item action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for delete item', 0); require 'lp_list.php'; }
        else {
            //$_SESSION['refresh'] = 1;
            if (!empty($_REQUEST['id'])) {
                $_SESSION['oLP']->delete_item($_REQUEST['id']);
            }
            $url = api_get_self().'?action=add_item&type=step&lp_id='.intval($_REQUEST['lp_id']);
            header('Location: '.$url);
            exit;
        }
        break;
    case 'edititemprereq':
    case 'edit_item_prereq':
        if (!$is_allowed_to_edit) {
            api_not_allowed(true);
        }
        if ($debug > 0) error_log('New LP - edit item prereq action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for edit item prereq', 0); require 'lp_list.php'; }
        else {
            if (!empty($_REQUEST['id']) && !empty($_REQUEST['submit_item'])) {
                $_SESSION['refresh'] = 1;
                $_SESSION['oLP']->edit_item_prereq($_REQUEST['id'], $_REQUEST['prereq']);
            }
            require 'lp_admin_view.php';
        }
        break;

    case 'restart':
        if ($debug > 0) error_log('New LP - restart action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for restart', 0); require 'lp_list.php'; }
        else {
            $_SESSION['oLP']->restart();
            require 'lp_view.php';
        }
        break;

    case 'last':
        if ($debug > 0) error_log('New LP - last action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for last', 0); require 'lp_list.php'; }
        else {
            $_SESSION['oLP']->last();
            require 'lp_view.php';
        }
        break;

    case 'first':
        if ($debug > 0) error_log('New LP - first action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for first', 0); require 'lp_list.php'; }
        else {
            $_SESSION['oLP']->first();
            require 'lp_view.php';
        }
        break;

    case 'next':
        if ($debug > 0) error_log('New LP - next action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for next', 0); require 'lp_list.php'; }
        else {
            $_SESSION['oLP']->next();
            require 'lp_view.php';
        }
        break;
    case 'previous':
        if ($debug > 0) error_log('New LP - previous action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for previous', 0); require 'lp_list.php'; }
        else {
            $_SESSION['oLP']->previous();
            require 'lp_view.php';
        }
        break;
    case 'content':
        if ($debug > 0) error_log('New LP - content action triggered', 0);
        if ($debug > 0) error_log('New LP - Item id is '.$_GET['item_id'], 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for content', 0); require 'lp_list.php'; }
        else {
            $_SESSION['oLP']->save_last();
            $_SESSION['oLP']->set_current_item($_GET['item_id']);
            $_SESSION['oLP']->start_current_item();
            require 'lp_content.php';
        }
        break;
    case 'view':
        if ($debug > 0)
            error_log('New LP - view action triggered', 0);
        if (!$lp_found) {
            error_log('New LP - No learnpath given for view', 0);
            require 'lp_list.php';
        } else {
            if ($debug > 0) {error_log('New LP - Trying to set current item to ' . $_REQUEST['item_id'], 0); }
            if ( !empty($_REQUEST['item_id']) ) {
                $_SESSION['oLP']->set_current_item($_REQUEST['item_id']);
            }
            require 'lp_view.php';
        }
        break;
    case 'save':
        if ($debug > 0) error_log('New LP - save action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for save', 0); require 'lp_list.php'; }
        else {
            $_SESSION['oLP']->save_item();
            require 'lp_save.php';
        }
        break;

    case 'stats':
        if ($debug > 0) error_log('New LP - stats action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for stats', 0); require 'lp_list.php'; }
        else {
            $_SESSION['oLP']->save_current();
            $_SESSION['oLP']->save_last();
            // Declare variables to be used in lp_stats.php.
            $lp_id = $_SESSION['oLP']->get_id();
            $list = $_SESSION['oLP']->get_flat_ordered_items_list($lp_id);
            $user_id = api_get_user_id();
            require 'lp_stats.php';
        }
        break;
    case 'list':
        if ($debug > 0) error_log('New LP - list action triggered', 0);
        if ($lp_found) {
            $_SESSION['refresh'] = 1;
            $_SESSION['oLP']->save_last();
        }
        require 'lp_list.php';
        break;

    case 'mode':
        // Switch between fullscreen and embedded mode.
        if ($debug > 0) error_log('New LP - mode change triggered', 0);
        $mode = $_REQUEST['mode'];
        if ($mode == 'fullscreen') {
            $_SESSION['oLP']->mode = 'fullscreen';
        } elseif ($mode == 'embedded') {
            $_SESSION['oLP']->mode = 'embedded';
        } elseif ($mode == 'embedframe') {
        	$_SESSION['oLP']->mode = 'embedframe';
        }
        require 'lp_view.php';
        break;

    case 'switch_view_mode':
        if ($debug > 0) error_log('New LP - switch_view_mode action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for switch', 0); require 'lp_list.php'; }
        $_SESSION['refresh'] = 1;
        $_SESSION['oLP']->update_default_view_mode();
        require 'lp_list.php';
        break;

    case 'switch_force_commit':
        if ($debug > 0) error_log('New LP - switch_force_commit action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for switch', 0); require 'lp_list.php'; }
        $_SESSION['refresh'] = 1;
        $_SESSION['oLP']->update_default_scorm_commit();
        require 'lp_list.php';
        break;
    /* Those 2 switches have been replaced by switc_attempt_mode switch
    case 'switch_reinit':
        if ($debug > 0) error_log('New LP - switch_reinit action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for switch', 0); require 'lp_list.php'; }
        $_SESSION['refresh'] = 1;
        $_SESSION['oLP']->update_reinit();
		require 'lp_list.php';
		break;
	case 'switch_seriousgame_mode':
		if($debug>0) error_log('New LP - switch_seriousgame_mode action triggered',0);
		if(!$lp_found){ error_log('New LP - No learnpath given for switch',0); require 'lp_list.php'; }
		$_SESSION['refresh'] = 1;
		$_SESSION['oLP']->set_seriousgame_mode();
		require 'lp_list.php';
		break;
     */
	case 'switch_attempt_mode':
		if($debug>0) error_log('New LP - switch_reinit action triggered',0);
		if(!$lp_found){ error_log('New LP - No learnpath given for switch',0); require 'lp_list.php'; }
		$_SESSION['refresh'] = 1;
		$_SESSION['oLP']->switch_attempt_mode();
        require 'lp_list.php';
        break;

    case 'switch_scorm_debug':
        if ($debug > 0) error_log('New LP - switch_scorm_debug action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for switch', 0); require 'lp_list.php'; }
        $_SESSION['refresh'] = 1;
        $_SESSION['oLP']->update_scorm_debug();
        require 'lp_list.php';
        break;

    case 'intro_cmdAdd':
        if ($debug > 0) error_log('New LP - intro_cmdAdd action triggered', 0);
        // Add introduction section page.
        break;

    case 'js_api_refresh':
        if ($debug > 0) error_log('New LP - js_api_refresh action triggered', 0);
        if (!$lp_found) { error_log('New LP - No learnpath given for js_api_refresh', 0); require 'lp_message.php'; }
        if (isset($_REQUEST['item_id'])) {
            $htmlHeadXtra[] = $_SESSION['oLP']->get_js_info($_REQUEST['item_id']);
        }
        require 'lp_message.php';
        break;
    case 'return_to_course_homepage':
        if (!$lp_found) { error_log('New LP - No learnpath given for stats', 0); require 'lp_list.php'; }
        else {
            $_SESSION['oLP']->save_current();
            $_SESSION['oLP']->save_last();
            // Declare variables to be used in lp_stats.php.
            $lp_id  = $_SESSION['oLP']->get_id();
            $list   = $_SESSION['oLP']->get_flat_ordered_items_list($lp_id);
            $user_id = api_get_user_id();
            header('location: '.api_get_path(WEB_COURSE_PATH).api_get_course_path().'/?id_session='.api_get_session_id());
        }
        break;
    case 'search':
        /* Include the search script, it's smart enough to know when we are
         * searching or not.
         */
        require 'lp_list_search.php';
        break;
    case 'impress':
        if ($debug > 0)
            error_log('New LP - view action triggered', 0);
        if (!$lp_found) {
            error_log('New LP - No learnpath given for view', 0);
            require 'lp_list.php';
        } else {
            if ($debug > 0) {error_log('New LP - Trying to impress this LP item to ' . $_REQUEST['item_id'], 0); }
            if ( !empty($_REQUEST['item_id']) ) {
                $_SESSION['oLP']->set_current_item($_REQUEST['item_id']);
            }
            require 'lp_impress.php';
        }
        break;
    default:
        if ($debug > 0) error_log('New LP - default action triggered', 0);
        //$_SESSION['refresh'] = 1;
        require 'lp_list.php';
        break;
}

if (!empty($_SESSION['oLP'])) {
    $_SESSION['lpobject'] = serialize($_SESSION['oLP']);
    if ($debug > 0) error_log('New LP - lpobject is serialized in session', 0);
}