<?php
/* For licensing terms, see /license.txt */
/**
*	@package chamilo.admin
*/

// name of the language file that needs to be included
$language_file = 'admin';
$cidReset = true;

require_once '../inc/global.inc.php';
$this_section = SECTION_PLATFORM_ADMIN;

api_protect_admin_script();

require_once api_get_path(LIBRARY_PATH).'fileManage.lib.php';
require_once api_get_path(LIBRARY_PATH).'course_category.lib.php';

$course_table       = Database::get_main_table(TABLE_MAIN_COURSE);
$course_user_table  = Database::get_main_table(TABLE_MAIN_COURSE_USER);

$course_code = isset($_GET['course_code']) ? $_GET['course_code'] : $_POST['code'];
$noPHP_SELF = true;
$tool_name = get_lang('ModifyCourseInfo');
$interbreadcrumb[] = array ("url" => 'index.php',       "name" => get_lang('PlatformAdmin'));
$interbreadcrumb[] = array ("url" => "course_list.php", "name" => get_lang('CourseList'));

// Get all course categories
$table_user = Database :: get_main_table(TABLE_MAIN_USER);

//Get the course infos
$sql = "SELECT * FROM $course_table WHERE code='".Database::escape_string($course_code)."'";
$result = Database::query($sql);
if (Database::num_rows($result) != 1) {
    header('Location: course_list.php');
    exit();
}
$course = Database::fetch_array($result, 'ASSOC');

$course_info = api_get_course_info($course_code);

// Get course teachers
$table_course_user = Database :: get_main_table(TABLE_MAIN_COURSE_USER);
$order_clause = api_sort_by_first_name() ? ' ORDER BY firstname, lastname' : ' ORDER BY lastname, firstname';
$sql = "SELECT user.user_id,lastname,firstname FROM $table_user as user,$table_course_user as course_user WHERE course_user.status='1' AND course_user.user_id=user.user_id AND course_user.course_code='".$course_code."'".$order_clause;
$res = Database::query($sql);
$course_teachers = array();
while ($obj = Database::fetch_object($res)) {
    $course_teachers[$obj->user_id] = api_get_person_name($obj->firstname, $obj->lastname);
}

// Get all possible teachers without the course teachers
if (api_is_multiple_url_enabled()) {
	$access_url_rel_user_table = Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
	$sql = "SELECT u.user_id,lastname,firstname
	        FROM $table_user as u
			INNER JOIN $access_url_rel_user_table url_rel_user
			ON (u.user_id=url_rel_user.user_id)
			WHERE url_rel_user.access_url_id=".api_get_current_access_url_id()." AND status=1".$order_clause;
} else {
    $sql = "SELECT user_id, lastname, firstname
            FROM $table_user WHERE status='1'".$order_clause;
}

$res = Database::query($sql);
$teachers = array();
$allTeachers = array();

$platform_teachers[0] = '-- '.get_lang('NoManager').' --';
while ($obj = Database::fetch_object($res)) {
    $allTeachers[$obj->user_id] = api_get_person_name($obj->firstname, $obj->lastname);
    if (!array_key_exists($obj->user_id, $course_teachers)) {
        $teachers[$obj->user_id] = api_get_person_name($obj->firstname, $obj->lastname);
    }

    if (isset($course_teachers[$obj->user_id]) && $course['tutor_name'] == $course_teachers[$obj->user_id]) {
        $course['tutor_name'] = $obj->user_id;
    }
    // We add in the array platform teachers
    $platform_teachers[$obj->user_id] = api_get_person_name($obj->firstname, $obj->lastname);
}

// Case where there is no teacher in the course
if (count($course_teachers) == 0) {
    $sql='SELECT tutor_name FROM '.$course_table.' WHERE code="'.$course_code.'"';
    $res = Database::query($sql);
    $tutor_name = Database::result($res, 0, 0);
    $course['tutor_name'] = array_search($tutor_name, $platform_teachers);
}

// Build the form
$form = new FormValidator('update_course');
$form->addElement('header', get_lang('Course').'  #'.$course_info['real_id'].' '.$course_code);
$form->addElement('hidden', 'code', $course_code);

//title
$form->add_textfield('title', get_lang('Title'), true, array ('class' => 'span6'));
$form->applyFilter('title', 'html_filter');
$form->applyFilter('title', 'trim');

// Code
$element = $form->addElement('text', 'real_code', array(get_lang('CourseCode'), get_lang('ThisValueCantBeChanged')));
$element->freeze();

// Visual code
$form->add_textfield('visual_code', array(get_lang('VisualCode'), get_lang('OnlyLettersAndNumbers'), get_lang('ThisValueIsUsedInTheCourseURL')), true, array('class' => 'span4'));

$form->applyFilter('visual_code', 'strtoupper');
$form->applyFilter('visual_code', 'html_filter');

$group = array(
    $form->createElement('select', 'platform_teachers', '', $teachers, ' id="platform_teachers" multiple=multiple size="4" style="width:300px;"'),
    $form->createElement('select', 'course_teachers', '',   $course_teachers, ' id="course_teachers" multiple=multiple size="4" style="width:300px;"')
);

$element_template = <<<EOT
	<div class="control-group">
		<label>
			<!-- BEGIN required --><span class="form_required">*</span> <!-- END required -->{label}
		</label>
		<div class="controls">
			<table cellpadding="0" cellspacing="0">
				<tr>
					<!-- BEGIN error --><span class="form_error">{error}</span><br /><!-- END error -->	<td>{element}</td>
				</tr>
			</table>
		</div>
	</div>
EOT;

$renderer = $form->defaultRenderer();
$renderer->setElementTemplate($element_template, 'group');
$form->addGroup($group, 'group', get_lang('CourseTeachers'), '</td><td width="80" align="center">'.
    '<input class="arrowr" style="width:30px;height:30px;padding-right:12px" type="button" onclick="moveItem(document.getElementById(\'platform_teachers\'), document.getElementById(\'course_teachers\'))"><br><br>'.
    '<input class="arrowl" style="width:30px;height:30px;padding-left:13px" type="button" onclick="moveItem(document.getElementById(\'course_teachers\'), document.getElementById(\'platform_teachers\'))"></td><td>'
);

if (array_key_exists('add_teachers_to_sessions_courses', $course)) {
    $form->addElement('checkbox', 'add_teachers_to_sessions_courses', null, get_lang('TeachersWillBeAddedAsCoachInAllCourseSessions'));
}

$coursesInSession = SessionManager::get_session_by_course($course['code']);
if (!empty($coursesInSession)) {
    foreach ($coursesInSession as $session) {
        $sessionId = $session['id'];
        $coaches = SessionManager::getCoachesByCourseSession($sessionId, $course['code']);
        $teachers = $allTeachers;

        $sessionTeachers = array();
        foreach ($coaches as $coachId) {
            $userInfo = api_get_user_info($coachId);
            $sessionTeachers[$coachId] = $userInfo['complete_name'];

            if (isset($teachers[$coachId])) {
                unset($teachers[$coachId]);
            }
        }

        $groupName =  'session_coaches['.$sessionId.']';
        $platformTeacherId = 'platform_teachers_by_session_'.$sessionId;
        $coachId = 'coaches_by_session_'.$sessionId;

        $platformTeacherName = 'platform_teachers_by_session';
        $coachName = 'coaches_by_session';

        $group = array(
            $form->createElement('select', $platformTeacherName, '', $teachers, ' id="'.$platformTeacherId.'" multiple=multiple size="4" style="width:300px;"'),
            $form->createElement('select', $coachName, '', $sessionTeachers, ' id="'.$coachId.'" multiple=multiple size="4" style="width:300px;"')
        );

        $renderer = $form->defaultRenderer();
        $renderer->setElementTemplate($element_template, $groupName);
        $sessionUrl = api_get_path(WEB_CODE_PATH).'admin/resume_session.php?id_session='.$sessionId;
        $form->addGroup($group, $groupName, Display::url($session['name'], $sessionUrl, array('target' => '_blank')).' - '.get_lang('Coaches'), '</td>
            <td width="80" align="center">
                <input class="arrowr" style="width:30px;height:30px;padding-right:12px" type="button" onclick="moveItem(document.getElementById(\''.$platformTeacherId.'\'), document.getElementById(\''.$coachId.'\'));">
                <br><br>
                <input class="arrowl" style="width:30px;height:30px;padding-left:13px" type="button" onclick="moveItem(document.getElementById(\''.$coachId.'\'), document.getElementById(\''.$platformTeacherId.'\'));">
            </td><td>'
        );
    }
}

// Category code
$url = api_get_path(WEB_AJAX_PATH).'course.ajax.php?a=search_category';
$categoryList = array();
if (!empty($course['category_code'])) {
    $data = getCategory($course['category_code']);
    $categoryList[] = array('id' => $data['code'], 'text' => $data['name']);
}

$form->addElement('select_ajax', 'category_code', get_lang('CourseFaculty'), null, array('url' => $url, 'defaults' => $categoryList));


$form->add_textfield('department_name', get_lang('CourseDepartment'), false, array('size' => '60'));
$form->applyFilter('department_name', 'html_filter');
$form->applyFilter('department_name', 'trim');

$form->add_textfield('department_url', get_lang('CourseDepartmentURL'), false, array('size' => '60'));
$form->applyFilter('department_url', 'html_filter');
$form->applyFilter('department_url', 'trim');

$form->addElement('select_language', 'course_language', get_lang('CourseLanguage'));
$form->applyFilter('select_language', 'html_filter');

$group = array();
$group[]= $form->createElement('radio', 'visibility', get_lang("CourseAccess"), get_lang('OpenToTheWorld'), COURSE_VISIBILITY_OPEN_WORLD);
$group[]= $form->createElement('radio', 'visibility', null, get_lang('OpenToThePlatform'), COURSE_VISIBILITY_OPEN_PLATFORM);
$group[]= $form->createElement('radio', 'visibility', null, get_lang('Private'), COURSE_VISIBILITY_REGISTERED);
$group[]= $form->createElement('radio', 'visibility', null, get_lang('CourseVisibilityClosed'), COURSE_VISIBILITY_CLOSED);
$group[]= $form->createElement('radio', 'visibility', null, get_lang('CourseVisibilityHidden'), COURSE_VISIBILITY_HIDDEN);
$form->addGroup($group, '', get_lang('CourseAccess'), '<br />');

$group = array();
$group[]= $form->createElement('radio', 'subscribe', get_lang('Subscription'), get_lang('Allowed'), 1);
$group[]= $form->createElement('radio', 'subscribe', null, get_lang('Denied'), 0);
$form->addGroup($group, '', get_lang('Subscription'), '<br />');

$group = array();
$group[]= $form->createElement('radio', 'unsubscribe', get_lang('Unsubscription'), get_lang('AllowedToUnsubscribe'), 1);
$group[]= $form->createElement('radio', 'unsubscribe', null, get_lang('NotAllowedToUnsubscribe'), 0);
$form->addGroup($group, '', get_lang('Unsubscription'), '<br />');

$form->addElement('text', 'disk_quota', array(get_lang('CourseQuota'), null, get_lang('MB')));
$form->addRule('disk_quota', get_lang('ThisFieldIsRequired'), 'required');
$form->addRule('disk_quota', get_lang('ThisFieldShouldBeNumeric'), 'numeric');

$list_course_extra_field = CourseManager::get_course_extra_field_list($course_code);

//@todo this is wrong
foreach ($list_course_extra_field as $extra_field) {
    switch ($extra_field['field_type']) {
        case CourseManager::COURSE_FIELD_TYPE_CHECKBOX:
            $checked = (array_key_exists('extra_field_value', $extra_field) && $extra_field['extra_field_value'] == 1)? array('checked'=>'checked'): '';
            $form->addElement('hidden', '_extra_'.$extra_field['field_variable'], 0);
            $field_display_text = $extra_field['field_display_text'];
            $form->addElement('checkbox', 'extra_'.$extra_field['field_variable'], array(null, get_lang('AllUsersAreAutomaticallyRegistered')), get_lang('SpecialCourse'), $checked);
            break;
    }
}
$form->addElement('style_submit_button', 'button', get_lang('ModifyCourseInfo'), 'onclick="valide()"; class="save"');

// Set some default values
$course['disk_quota'] = round(DocumentManager::get_course_quota($course_code) /1024/1024, 1);
$course['title'] = api_html_entity_decode($course['title'], ENT_QUOTES, $charset);
$course['real_code'] = $course['code'];
$course['add_teachers_to_sessions_courses'] = isset($course['add_teachers_to_sessions_courses']) ? $course['add_teachers_to_sessions_courses'] : 0;

$form->setDefaults($course);

// Validate form
if ($form->validate()) {
    $course = $form->getSubmitValues();
    $course_code = $course['code'];
    $visual_code = $course['visual_code'];
    $visual_code = generate_course_code($visual_code);

    // Check if the visual code is already used by *another* course
    $visual_code_is_used = false;

    $warn = get_lang('TheFollowingCoursesAlreadyUseThisVisualCode').':';
    if (!empty($visual_code)) {
        $list = CourseManager::get_courses_info_from_visual_code($visual_code);
        foreach ($list as $course_temp) {
            if ($course_temp['code'] != $course_code) {
               $visual_code_is_used = true;
               $warn .= ' '.$course_temp['title'].' ('.$course_temp['code'].'),';
            }
        }
        $warn = substr($warn, 0, -1);
    }

    // an extra field
    $extras = array();
    foreach ($course as $key => $value) {
        if (substr($key, 0, 6) == 'extra_') {
            $extras[substr($key, 6)] = $value;
        }

        if (substr($key, 0, 7) == '_extra_') {
            if (!array_key_exists(substr($key, 7), $extras)) {
                $extras[substr($key, 7)] = $value;
            }
        }
    }

	$tutor_id = isset($course['tutor_name']) ? $course['tutor_name'] : null;
	$tutor_name = isset($platform_teachers[$tutor_id]) ? $platform_teachers[$tutor_id] : null;
	$teachers = $course['group']['course_teachers'];

	$title = $course['title'];
	$category_code = $course['category_code'];
	$department_name = $course['department_name'];
	$department_url = $course['department_url'];
	$course_language = $course['course_language'];
    $course['disk_quota'] = $course['disk_quota']*1024*1024;
	$disk_quota = $course['disk_quota'];
	$visibility = $course['visibility'];
	$subscribe = $course['subscribe'];
	$unsubscribe = $course['unsubscribe'];

	if (!stristr($department_url, 'http://')) {
		$department_url = 'http://'.$department_url;
	}

    $sql = "UPDATE $course_table SET course_language='".Database::escape_string($course_language)."',
                title='".Database::escape_string($title)."',
                category_code='".Database::escape_string($category_code)."',
                tutor_name='".Database::escape_string($tutor_name)."',
                visual_code='".Database::escape_string($visual_code)."',
                department_name='".Database::escape_string($department_name)."',
                department_url='".Database::escape_string($department_url)."',
                disk_quota='".Database::escape_string($disk_quota)."',
                visibility = '".Database::escape_string($visibility)."',
                subscribe = '".Database::escape_string($subscribe)."',
                unsubscribe='".Database::escape_string($unsubscribe)."'
            WHERE code='".Database::escape_string($course_code)."'";
	Database::query($sql);

	// update the extra fields
	if (count($extras) > 0) {
		foreach ($extras as $key => $value) {
			CourseManager::update_course_extra_field_value($course_code, $key, $value);
		}
	}

    $addTeacherToSessionCourses = isset($course['add_teachers_to_sessions_courses']) && !empty($course['add_teachers_to_sessions_courses']) ? 1 : 0;

    // Updating teachers

    if ($addTeacherToSessionCourses) {

        // Updating session coaches
        $sessionCoaches = $course['session_coaches'];
        if (!empty($sessionCoaches)) {
            foreach ($sessionCoaches as $sessionId => $teacherInfo) {
                $coachesToSubscribe = $teacherInfo['coaches_by_session'];
                SessionManager::updateCoaches($sessionId, $course['code'], $coachesToSubscribe, true);
            }
        }

        CourseManager::updateTeachers($course_code, $teachers, false, true, false);
    } else {
        // Normal behaviour
        CourseManager::updateTeachers($course_code, $teachers, true, false);

        // Updating session coaches
        $sessionCoaches = $course['session_coaches'];
        if (!empty($sessionCoaches)) {
            foreach ($sessionCoaches as $sessionId => $teacherInfo) {
                $coachesToSubscribe = isset($teacherInfo['coaches_by_session']) ? $teacherInfo['coaches_by_session'] : null;
                if (!empty($coachesToSubscribe)) {
                    SessionManager::updateCoaches(
                        $sessionId,
                        $course['code'],
                        $coachesToSubscribe,
                        true
                    );
                }
            }
        }
    }

	$sql = "INSERT IGNORE INTO ".$course_user_table . " SET
				course_code = '".Database::escape_string($course_code). "',
				user_id = '".$tutor_id . "',
				status = '1',
				role = '',
				tutor_id='0',
				sort='0',
				user_course_cat='0'";
	Database::query($sql);

    if (array_key_exists('add_teachers_to_sessions_courses', $course_info)) {
        $sql = "UPDATE $course_table SET add_teachers_to_sessions_courses = '$addTeacherToSessionCourses'
                WHERE id = ".$course_info['real_id'];
        Database::query($sql);
    }

	$course_id = $course_info['real_id'];
	/*$forum_config_table = Database::get_course_table(TOOL_FORUM_CONFIG_TABLE);
	$sql = "UPDATE ".$forum_config_table." SET default_lang='".Database::escape_string($course_language)."' WHERE c_id = $course_id ";*/
	if ($visual_code_is_used) {
	    header('Location: course_list.php?action=show_msg&warn='.urlencode($warn));
	} else {
        header('Location: course_list.php');
	}
	exit;
}

Display::display_header($tool_name);

echo '<div class="actions">';
echo Display::url(Display::return_icon('back.png', get_lang('Back')), api_get_path(WEB_CODE_PATH).'admin/course_list.php');
echo Display::url(Display::return_icon('course_home.png', get_lang('CourseHome')), $course_info['course_public_url'], array('target' => '_blank'));
echo '</div>';

echo "<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() {
    // Checking all multiple

    $('select').filter(function() {
        if ($(this).attr('multiple')) {
            $(this).find('option').each(function() {
                $(this).attr('selected', true);
            });
        }
    });
	//document.update_course.submit();
}
</script>";

// Display the form
$form->display();

Display :: display_footer();