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

/**
 * @package chamilo.admin
 * @todo use formvalidator
 */
// resetting the course id.
$cidReset = true;

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

$sessionId = isset($_GET['id_session']) ? intval($_GET['id_session']) : null;
$add = isset($_GET['add']) ? Security::remove_XSS($_GET['add']) : null;

SessionManager::protectSession($sessionId);

$xajax = new xajax();
$xajax->registerFunction(array('search_courses', 'AddCourseToSession', 'search_courses'));

// Setting the section (for the tabs)
$this_section = SECTION_PLATFORM_ADMIN;

// setting breadcrumbs
//$interbreadcrumb[] = array('url' => 'index.php', 'name' => get_lang('PlatformAdmin'));
$interbreadcrumb[] = array('url' => 'session_list.php','name' => get_lang('SessionList'));
$interbreadcrumb[] = array('url' => "resume_session.php?id_session=".$sessionId, "name" => get_lang('SessionOverview'));

// Database Table Definitions
$tbl_session_rel_course_rel_user = Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
$tbl_session = Database::get_main_table(TABLE_MAIN_SESSION);
$tbl_session_rel_user = Database::get_main_table(TABLE_MAIN_SESSION_USER);
$tbl_session_rel_course = Database::get_main_table(TABLE_MAIN_SESSION_COURSE);
$tbl_course = Database::get_main_table(TABLE_MAIN_COURSE);

// setting the name of the tool
$tool_name= get_lang('SubscribeCoursesToSession');

$add_type = 'multiple';
if (isset($_GET['add_type']) && $_GET['add_type']!=''){
    $add_type = Security::remove_XSS($_REQUEST['add_type']);
}

$page = isset($_GET['page']) ? Security::remove_XSS($_GET['page']) : null;

$xajax->processRequests();

$htmlHeadXtra[] = $xajax->getJavascript('../inc/lib/xajax/');
$htmlHeadXtra[] = '<script>
function add_course_to_session(code, content) {
	document.getElementById("course_to_add").value = "";
	document.getElementById("ajax_list_courses_single").innerHTML = "";
	destination = document.getElementById("destination");
	for (i=0;i<destination.length;i++) {
		if (destination.options[i].text == content) {
            return false;
		}
	}

	destination.options[destination.length] = new Option(content,code);
	destination.selectedIndex = -1;
	sortOptions(destination.options);
}

function remove_item(origin)
{
	for(var i = 0 ; i<origin.options.length ; i++) {
		if(origin.options[i].selected) {
			origin.options[i]=null;
			i = i-1;
		}
	}
}
</script>';

$errorMsg = '';
$CourseList = $SessionList = array();
$courses = $sessions = array();

if (isset($_POST['formSent']) && $_POST['formSent']) {

    $courseList = $_POST['SessionCoursesList'];
    SessionManager::add_courses_to_session($sessionId, $courseList, true);
    Display::addFlash(Display::return_message(get_lang('Updated')));

    if (isset($add)) {
        header('Location: add_users_to_session.php?id_session='.$sessionId.'&add=true');
    } else {
        header('Location: resume_session.php?id_session='.$sessionId);
    }

    exit;
}

// display the header
Display::display_header($tool_name);

if ($add_type == 'multiple') {
    $link_add_type_unique = '<a href="'.api_get_self().'?id_session='.$sessionId.'&add='.$add.'&add_type=unique">'.
        Display::return_icon('single.gif').get_lang('SessionAddTypeUnique').'</a>';
    $link_add_type_multiple = Display::return_icon('multiple.gif').get_lang('SessionAddTypeMultiple').' ';
} else {
    $link_add_type_unique = Display::return_icon('single.gif').get_lang('SessionAddTypeUnique').'&nbsp;&nbsp;&nbsp;';
    $link_add_type_multiple = '<a href="'.api_get_self().'?id_session='.$sessionId.'&add='.$add.'&add_type=multiple">'.
        Display::return_icon('multiple.gif').get_lang('SessionAddTypeMultiple').'</a>';
}

// the form header
$session_info = SessionManager::fetch($sessionId);
echo '<div class="actions">';
echo $link_add_type_unique.$link_add_type_multiple;
echo '</div>';

$ajax_search = $add_type == 'unique' ? true : false;
$nosessionCourses = $sessionCourses = array();
if ($ajax_search) {

    $sql="SELECT course.id, code, title, visual_code, session_id
			FROM $tbl_course course
			INNER JOIN $tbl_session_rel_course session_rel_course
            ON
                course.id = session_rel_course.c_id AND
                session_rel_course.session_id = ".intval($sessionId)."
			ORDER BY ".(sizeof($courses)?"(code IN(".implode(',', $courses).")) DESC,":"")." title";

    if (api_is_multiple_url_enabled()) {
        $tbl_course_rel_access_url = Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
        $access_url_id = api_get_current_access_url_id();
        if ($access_url_id != -1){
            $sql = "SELECT course.id, code, title, visual_code, session_id
                    FROM $tbl_course course
                    INNER JOIN $tbl_session_rel_course session_rel_course
                        ON course.id = session_rel_course.c_id
                        AND session_rel_course.session_id = ".intval($sessionId)."
                        INNER JOIN $tbl_course_rel_access_url url_course
                        ON (url_course.c_id = course.id)
                    WHERE access_url_id = $access_url_id
                    ORDER BY ".(sizeof($courses)?"(code IN(".implode(',',$courses).")) DESC,":"")." title";
        }
    }

    $result = Database::query($sql);
    $Courses = Database::store_result($result);

    foreach ($Courses as $course) {
        $sessionCourses[$course['id']] = $course ;
    }
} else {
    $sql = "SELECT course.id, code, title, visual_code, session_id
			FROM $tbl_course course
			LEFT JOIN $tbl_session_rel_course session_rel_course
            ON
                course.id = session_rel_course.c_id AND
                session_rel_course.session_id = ".intval($sessionId)."
			ORDER BY ".(sizeof($courses)?"(code IN(".implode(',',$courses).")) DESC,":"")." title";

    if (api_is_multiple_url_enabled()) {
        $tbl_course_rel_access_url = Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
        $access_url_id = api_get_current_access_url_id();
        if ($access_url_id != -1){
            $sql = "SELECT course.id, code, title, visual_code, session_id
                    FROM $tbl_course course
                    LEFT JOIN $tbl_session_rel_course session_rel_course
                    ON
                        course.id = session_rel_course.c_id AND
                        session_rel_course.session_id = ".intval($sessionId)."
                    INNER JOIN $tbl_course_rel_access_url url_course
                    ON (url_course.c_id = course.id)
                    WHERE access_url_id = $access_url_id
                    ORDER BY ".(sizeof($courses)?"(code IN(".implode(',',$courses).")) DESC,":"")." title";
        }
    }
    $result = Database::query($sql);
    $Courses = Database::store_result($result);
    foreach ($Courses as $course) {
        if ($course['session_id'] == $sessionId) {
            $sessionCourses[$course['id']] = $course ;
        } else {
            $nosessionCourses[$course['id']] = $course ;
        }
    }
}

if (!api_is_platform_admin() && api_is_teacher()) {
    $coursesFromTeacher = CourseManager::getCoursesFollowedByUser(
        api_get_user_id(),
        COURSEMANAGER
    );

    foreach ($nosessionCourses as &$course) {
        if (in_array($course['code'], array_keys($coursesFromTeacher))) {
            continue;
        } else {
            unset($nosessionCourses[$course['id']]);
        }
    }
}

unset($Courses);
?>
    <form name="formulaire" method="post" action="<?php echo api_get_self(); ?>?page=<?php echo $page; ?>&id_session=<?php echo $sessionId; ?><?php if(!empty($_GET['add'])) echo '&add=true' ; ?>" style="margin:0px;" <?php if($ajax_search){echo ' onsubmit="valide();"';}?>>
        <legend><?php echo $tool_name.' ('.$session_info['name'].')'; ?></legend>
        <input type="hidden" name="formSent" value="1" />

        <?php
        if (!empty($errorMsg)) {
            Display::display_normal_message($errorMsg); //main API
        }
        ?>
        <div id="multiple-add-session" class="row">
            <div class="col-md-5">
                <label><?php echo get_lang('CourseListInPlatform') ?> :</label>
                <?php
                if (!($add_type == 'multiple')) {
                    ?>
                    <input type="text" id="course_to_add" onkeyup="xajax_search_courses(this.value,'single')" class="form-control"/>
                    <div id="ajax_list_courses_single"></div>
                <?php
                } else {
                    ?>
                    <div id="ajax_list_courses_multiple">
                        <select id="origin" name="NoSessionCoursesList[]" multiple="multiple" size="20" class="form-control">
                            <?php foreach ($nosessionCourses as $enreg) { ?>
                                <option value="<?php echo $enreg['id']; ?>" <?php echo 'title="'.htmlspecialchars($enreg['title'].' ('.$enreg['visual_code'].')',ENT_QUOTES).'"'; if(in_array($enreg['code'],$CourseList)) echo 'selected="selected"'; ?>>
                                    <?php echo $enreg['title'].' ('.$enreg['visual_code'].')'; ?>
                                </option>
                            <?php } ?>
                        </select>
                    </div>
                <?php
                }
                unset($nosessionCourses);
                ?>
            </div>
            <div class="col-md-2">
                <?php if($add_type == 'multiple') { ?>
                    <div class="code-course">
                        <?php echo get_lang('FirstLetterCourse'); ?> :
                        <br /><br />
                        <select name="firstLetterCourse" onchange = "xajax_search_courses(this.value,'multiple')" class="form-control">
                            <option value="%">--</option>
                            <?php
                            echo Display :: get_alphabet_options();
                            echo Display :: get_numeric_options(0,9,'');
                            ?>
                        </select>
                    </div>
                <?php } ?>
                <div class="control-course">
                    <br /><br />
                <?php
                if ($ajax_search) {
                    ?>
                    <button class="btn btn-primary" type="button" onclick="remove_item(document.getElementById('destination'))">
                        <i class="fa fa-chevron-left"></i>
                    </button>
                    <br /><br />
                <?php
                } else {
                    ?>
                    <button class="btn btn-primary" type="button" onclick="moveItem(document.getElementById('origin'), document.getElementById('destination'))" onclick="moveItem(document.getElementById('origin'), document.getElementById('destination'))">
                        <i class="fa fa-chevron-right"></i>
                    </button>
                    <br /><br />
                    <button class="btn btn-primary" type="button" onclick="moveItem(document.getElementById('destination'), document.getElementById('origin'))" onclick="moveItem(document.getElementById('destination'), document.getElementById('origin'))">
                        <i class="fa fa-chevron-left"></i>
                    </button>
                    <br /><br />
                <?php
                }
                ?>
                <?php
                if (isset($_GET['add'])) {
                    echo '<button class="btn btn-success" type="button" value="" onclick="valide()" >'.get_lang('NextStep').'</button>';
                } else {
                    echo '<button class="btn btn-success" type="button" value="" onclick="valide()" >'.get_lang('SubscribeCoursesToSession').'</button>';
                }
                ?>
                </div>
            </div>
            <div class="col-md-5">
                <label><?php echo get_lang('CourseListInSession') ?> :</label>
                <select id='destination' name="SessionCoursesList[]" multiple="multiple" size="20" class="form-control">

                    <?php
                    foreach($sessionCourses as $enreg) {
                        ?>
                        <option value="<?php echo $enreg['id']; ?>" title="<?php echo htmlspecialchars($enreg['title'].' ('.$enreg['visual_code'].')',ENT_QUOTES); ?>">
                            <?php echo $enreg['title'].' ('.$enreg['visual_code'].')'; ?>
                        </option>
                    <?php
                    }
                    unset($sessionCourses);
                    ?>
                </select>
            </div>
        </div>
    </form>
    <script>
        function moveItem(origin , destination) {
            for(var i = 0 ; i<origin.options.length ; i++) {
                if(origin.options[i].selected) {
                    destination.options[destination.length] = new Option(origin.options[i].text,origin.options[i].value);
                    origin.options[i]=null;
                    i = i-1;
                }
            }
            destination.selectedIndex = -1;
            sortOptions(destination.options);
        }

        function sortOptions(options) {
            newOptions = new Array();
            for (i = 0 ; i<options.length ; i++) {
                newOptions[i] = options[i];
            }

            newOptions = newOptions.sort(mysort);
            options.length = 0;

            for(i = 0 ; i < newOptions.length ; i++){
                options[i] = newOptions[i];
            }
        }

        function mysort(a, b) {
            if(a.text.toLowerCase() > b.text.toLowerCase()){
                return 1;
            }
            if(a.text.toLowerCase() < b.text.toLowerCase()){
                return -1;
            }
            return 0;
        }

        function valide() {
            var options = document.getElementById('destination').options;
            for (i = 0 ; i<options.length ; i++)
                options[i].selected = true;

            document.forms.formulaire.submit();
        }
    </script>
<?php
Display::display_footer();
