<?php // $Id: course_list.php 20441 2009-05-10 07:39:15Z ivantcholakov $
/* For licensing terms, see /dokeos_license.txt */
/**
 * This script shows a list of courses and allows searching for courses codes
 * and names
 * @package dokeos.admin
 */
/*
==============================================================================
		INIT SECTION
==============================================================================
*/

// name of the language file that needs to be included 
$language_file = array('admin','courses');
$cidReset = true;
require ('../inc/global.inc.php');
$this_section = SECTION_PLATFORM_ADMIN;

api_protect_admin_script();
require_once (api_get_path(LIBRARY_PATH).'course.lib.php');
require_once (api_get_path(LIBRARY_PATH).'formvalidator/FormValidator.class.php');
require_once (api_get_path(LIBRARY_PATH).'sortabletable.class.php');
require_once '../gradebook/lib/be/gradebookitem.class.php';
require_once '../gradebook/lib/be/category.class.php';
/**
 * Get the number of courses which will be displayed
 */ 
function get_number_of_courses()
{
	$course_table = Database :: get_main_table(TABLE_MAIN_COURSE);
	$sql = "SELECT COUNT(code) AS total_number_of_items FROM $course_table";
	
	global $_configuration;
    if ((api_is_platform_admin() || api_is_session_admin()) && $_configuration['multiple_access_urls']==true && api_get_current_access_url_id()!=-1) {
    	$access_url_rel_course_table = Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
    	$sql.= " INNER JOIN $access_url_rel_course_table url_rel_course ON (code=url_rel_course.course_code)";    		
    }
    
	if (isset ($_GET['keyword']))
	{
		$keyword = Database::escape_string($_GET['keyword']);
		$sql .= " WHERE title LIKE '%".$keyword."%' OR code LIKE '%".$keyword."%' OR visual_code LIKE '%".$keyword."%'";
	}
	elseif (isset ($_GET['keyword_code']))
	{
		$keyword_code = Database::escape_string($_GET['keyword_code']);
		$keyword_title = Database::escape_string($_GET['keyword_title']);
		$keyword_category = Database::escape_string($_GET['keyword_category']);
		$keyword_language = Database::escape_string($_GET['keyword_language']);
		$keyword_visibility = Database::escape_string($_GET['keyword_visibility']);
		$keyword_subscribe = Database::escape_string($_GET['keyword_subscribe']);
		$keyword_unsubscribe = Database::escape_string($_GET['keyword_unsubscribe']);
		$sql .= " WHERE (code LIKE '%".$keyword_code."%' OR visual_code LIKE '%".$keyword_code."%') AND title LIKE '%".$keyword_title."%' AND category_code LIKE '%".$keyword_category."%'  AND course_language LIKE '%".$keyword_language."%'   AND visibility LIKE '%".$keyword_visibility."%'    AND subscribe LIKE '".$keyword_subscribe."'AND unsubscribe LIKE '".$keyword_unsubscribe."'";
	}
	
	 // adding the filter to see the user's only of the current access_url
	if ((api_is_platform_admin() || api_is_session_admin()) && $_configuration['multiple_access_urls']==true && api_get_current_access_url_id()!=-1) {		
    		$sql.= " AND url_rel_course.access_url_id=".api_get_current_access_url_id();   	  
    }
    
	$res = api_sql_query($sql, __FILE__, __LINE__);
	$obj = Database::fetch_object($res);
	return $obj->total_number_of_items;
}
/**
 * Get course data to display
 */
function get_course_data($from, $number_of_items, $column, $direction)
{
	$course_table = Database :: get_main_table(TABLE_MAIN_COURSE);
	$users_table = Database :: get_main_table(TABLE_MAIN_USER);
	$course_users_table = Database :: get_main_table(TABLE_MAIN_COURSE_USER);
	
	$sql = "SELECT code AS col0, visual_code AS col1, title AS col2, course_language AS col3, category_code AS col4, subscribe AS col5, unsubscribe AS col6, code AS col7, tutor_name as col8, code AS col9, visibility AS col10 FROM $course_table";
	
	global $_configuration;
    if ((api_is_platform_admin() || api_is_session_admin()) && $_configuration['multiple_access_urls']==true && api_get_current_access_url_id()!=-1) {
    	$access_url_rel_course_table = Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
    	$sql.= " INNER JOIN $access_url_rel_course_table url_rel_course ON (code=url_rel_course.course_code)";    		
    }    
    
	if (isset ($_GET['keyword']))
	{
		$keyword = Database::escape_string($_GET['keyword']);
		$sql .= " WHERE title LIKE '%".$keyword."%' OR code LIKE '%".$keyword."%' OR visual_code LIKE '%".$keyword."%'";
	}
	elseif (isset ($_GET['keyword_code']))
	{
		$keyword_code = Database::escape_string($_GET['keyword_code']);
		$keyword_title = Database::escape_string($_GET['keyword_title']);
		$keyword_category = Database::escape_string($_GET['keyword_category']);
		$keyword_language = Database::escape_string($_GET['keyword_language']);
		$keyword_visibility = Database::escape_string($_GET['keyword_visibility']);
		$keyword_subscribe = Database::escape_string($_GET['keyword_subscribe']);
		$keyword_unsubscribe = Database::escape_string($_GET['keyword_unsubscribe']);
		$sql .= " WHERE (code LIKE '%".$keyword_code."%' OR visual_code LIKE '%".$keyword_code."%') AND title LIKE '%".$keyword_title."%' AND category_code LIKE '%".$keyword_category."%'  AND course_language LIKE '%".$keyword_language."%'   AND visibility LIKE '%".$keyword_visibility."%'    AND subscribe LIKE '".$keyword_subscribe."'AND unsubscribe LIKE '".$keyword_unsubscribe."'";
	}
	
	 // adding the filter to see the user's only of the current access_url
	if ((api_is_platform_admin() || api_is_session_admin()) && $_configuration['multiple_access_urls']==true && api_get_current_access_url_id()!=-1) {		
    		$sql.= " AND url_rel_course.access_url_id=".api_get_current_access_url_id();   	  
    }

	$sql .= " ORDER BY col$column $direction ";
	$sql .= " LIMIT $from,$number_of_items";
	$res = api_sql_query($sql, __FILE__, __LINE__);
	$courses = array ();
	while ($course = Database::fetch_row($res))
	{
		//place colour icons in front of courses

		//$course[1] = get_course_visibility_icon($course[10]).'<a href="../course_home/course_home.php?cidReq='.$course[0].'">'.$course[1].'</a>'; // This is not the preferable way to go to the homepage.
		$course[1] = get_course_visibility_icon($course[10]).'<a href="'.api_get_path(WEB_COURSE_PATH).$course[0].'/index.php">'.$course[1].'</a>';

		$course[5] = $course[5] == SUBSCRIBE_ALLOWED ? get_lang('Yes') : get_lang('No');
		$course[6] = $course[6] == UNSUBSCRIBE_ALLOWED ? get_lang('Yes') : get_lang('No');
		$course[7] = CourseManager :: is_virtual_course_from_system_code($course[7]) ? get_lang('Yes') : get_lang('No');
		$course_rem = array($course[0],$course[1],$course[2],$course[3],$course[4],$course[5],$course[6],$course[7],$course[8],$course[9]);
		$courses[] = $course_rem;
	}
	return $courses;
}
/**
 * Filter to display the edit-buttons
 */
function modify_filter($code)
{
	global $charset;
	return
		'<a href="course_information.php?code='.$code.'">'.Display::return_icon('synthese_view.gif', get_lang('Info')).'</a>&nbsp;'.

		//'<a href="../course_home/course_home.php?cidReq='.$code.'">'.Display::return_icon('course_home.gif', get_lang('CourseHomepage')).'</a>&nbsp;'. // This is not the preferable way to go to the homepage.
		'<a href="'.api_get_path(WEB_COURSE_PATH).$code.'/index.php">'.Display::return_icon('course_home.gif', get_lang('CourseHomepage')).'</a>&nbsp;'.

		'<a href="../tracking/courseLog.php?cidReq='.$code.'">'.Display::return_icon('statistics.gif', get_lang('Tracking')).'</a>&nbsp;'.
		'<a href="course_edit.php?course_code='.$code.'">'.Display::return_icon('edit.gif', get_lang('Edit')).'</a>&nbsp;'.
		'<a href="course_list.php?delete_course='.$code.'"  onclick="javascript:if(!confirm('."'".addslashes(api_htmlentities(get_lang("ConfirmYourChoice"),ENT_QUOTES,$charset))."'".')) return false;">'.Display::return_icon('delete.gif', get_lang('Delete')).'</a>';
}
/**
 * Return an icon representing the visibility of the course
 */
function get_course_visibility_icon($v)
{
	$path = api_get_path(REL_CODE_PATH);
	$style = 'margin-bottom:-5px;margin-right:5px;';
	switch($v)
	{
		case 0:
			return Display::return_icon('bullet_red.gif', get_lang('CourseVisibilityClosed'), array('style'=>$style));
			break;
		case 1:
			return Display::return_icon('bullet_orange.gif', get_lang('Private'), array('style'=>$style));
			break;
		case 2:
			return Display::return_icon('bullet_green.gif', get_lang('OpenToThePlatform'), array('style'=>$style));
			break;
		case 3:
			return Display::return_icon('bullet_blue.gif', get_lang('OpenToTheWorld'), array('style'=>$style));
			break;
		default:
			return '';
	}
}

if (isset ($_POST['action']))
{
	switch ($_POST['action'])
	{
		// Delete selected courses
		case 'delete_courses' :
			$course_codes = $_POST['course'];
			if (count($course_codes) > 0)
			{
				foreach ($course_codes as $index => $course_code)
				{
					CourseManager :: delete_course($course_code);
					$obj_cat=new Category();
					$obj_cat->update_category_delete($course_code);
				}
			}
			break;
	}
}
if (isset ($_GET['search']) && $_GET['search'] == 'advanced')
{
	// Get all course categories
	$table_course_category = Database :: get_main_table(TABLE_MAIN_CATEGORY);
	$interbreadcrumb[] = array ("url" => 'index.php', "name" => get_lang('PlatformAdmin'));
	$interbreadcrumb[] = array ("url" => 'course_list.php', "name" => get_lang('CourseList'));
	$tool_name = get_lang('SearchACourse');
	Display :: display_header($tool_name);
	//api_display_tool_title($tool_name);
	$form = new FormValidator('advanced_course_search', 'get');
	$form->addElement('header', '', $tool_name);
	$form->add_textfield('keyword_code', get_lang('CourseCode'), false);
	$form->add_textfield('keyword_title', get_lang('Title'), false);
	$categories = array();
	$categories_select = $form->addElement('select', 'keyword_category', get_lang('CourseFaculty'), $categories);
	CourseManager::select_and_sort_categories($categories_select);
	$el = & $form->addElement('select_language', 'keyword_language', get_lang('CourseLanguage'));
	$el->addOption(get_lang('All'), '%');
	$form->addElement('radio', 'keyword_visibility', get_lang("CourseAccess"), get_lang('OpenToTheWorld'), COURSE_VISIBILITY_OPEN_WORLD);
	$form->addElement('radio', 'keyword_visibility', null, get_lang('OpenToThePlatform'), COURSE_VISIBILITY_OPEN_PLATFORM);
	$form->addElement('radio', 'keyword_visibility', null, get_lang('Private'), COURSE_VISIBILITY_REGISTERED);
	$form->addElement('radio', 'keyword_visibility', null, get_lang('CourseVisibilityClosed'), COURSE_VISIBILITY_CLOSED);
	$form->addElement('radio', 'keyword_visibility', null, get_lang('All'), '%');
	$form->addElement('radio', 'keyword_subscribe', get_lang('Subscription'), get_lang('Allowed'), 1);
	$form->addElement('radio', 'keyword_subscribe', null, get_lang('Denied'), 0);
	$form->addElement('radio', 'keyword_subscribe', null, get_lang('All'), '%');
	$form->addElement('radio', 'keyword_unsubscribe', get_lang('Unsubscription'), get_lang('AllowedToUnsubscribe'), 1);
	$form->addElement('radio', 'keyword_unsubscribe', null, get_lang('NotAllowedToUnsubscribe'), 0);
	$form->addElement('radio', 'keyword_unsubscribe', null, get_lang('All'), '%');
	$form->addElement('style_submit_button', 'submit', get_lang('SearchCourse'),'class="search"');
	$defaults['keyword_language'] = '%';
	$defaults['keyword_visibility'] = '%';
	$defaults['keyword_subscribe'] = '%';
	$defaults['keyword_unsubscribe'] = '%';
	$form->setDefaults($defaults);
	$form->display();
}
else
{
	$interbreadcrumb[] = array ("url" => 'index.php', "name" => get_lang('PlatformAdmin'));
	$tool_name = get_lang('CourseList');
	Display :: display_header($tool_name);
    if (isset($_GET['action'])) {
        switch ($_GET['action']) {
            case 'show_msg':
                if (!empty($_GET['warn'])) {
                    Display::display_warning_message(urldecode($_GET['warn']));
                }
                if (!empty($_GET['msg'])) {
                	Display::display_normal_message(urldecode($_GET['msg']));
                }
                break;
            default:
                break;
        }
    }
	//api_display_tool_title($tool_name);
	if (isset ($_GET['delete_course']))
	{

		CourseManager :: delete_course($_GET['delete_course']);
		
		$obj_cat=new Category();
		$obj_cat->update_category_delete($_GET['delete_course']);
		
	}
	// Create a search-box
	$form = new FormValidator('search_simple','get','','','width=200px',false);
	$renderer =& $form->defaultRenderer();
	$renderer->setElementTemplate('<span>{element}</span> ');
	$form->addElement('text','keyword',get_lang('keyword'));
	$form->addElement('style_submit_button', 'submit', get_lang('SearchCourse'),'class="search"');
	$form->addElement('static','search_advanced_link',null,'<a href="course_list.php?search=advanced">'.get_lang('AdvancedSearch').'</a>');
	echo '<div style="float:right;margin-top:5px;margin-right:5px;">
			  <a href="'.api_get_path(WEB_CODE_PATH).'admin/course_add.php">'.Display::return_icon('course_add.gif',get_lang('AddSession')).get_lang('AddCourse').'</a>									
		 </div>';
		 
	echo '<div class="actions">';		
		$form->display();				
	echo '</div>';
	// Create a sortable table with the course data
	$table = new SortableTable('courses', 'get_number_of_courses', 'get_course_data',2);
	$parameters=array();
	$table->set_additional_parameters($parameters);
	$table->set_header(0, '', false);
	$table->set_header(1, get_lang('Code'));
	$table->set_header(2, get_lang('Title'));
	$table->set_header(3, get_lang('Language'));
	$table->set_header(4, get_lang('Category'));
	$table->set_header(5, get_lang('SubscriptionAllowed'));
	$table->set_header(6, get_lang('UnsubscriptionAllowed'));
	$table->set_header(7, get_lang('IsVirtualCourse'));
	$table->set_header(8, get_lang('Teacher'));
	$table->set_header(9, get_lang('Modify'), false,'width="120px"');	
	$table->set_column_filter(9,'modify_filter');	
	$table->set_form_actions(array ('delete_courses' => get_lang('DeleteCourse')),'course');
	$table->display();
}
/*
==============================================================================
		FOOTER 
==============================================================================
*/
Display :: display_footer();
?>
