<?php
/*
===============================================================================
	Dokeos - elearning and course management software

	Copyright (c) 2004 Dokeos S.A.
	Copyright (c) 2003 Ghent University (UGent)
	Copyright (c) 2001 Universite catholique de Louvain (UCL)
	Copyright (c) Hugues Peeters
	Copyright (c) Thomas Depraetere
	Copyright (c) Christophe Gesche
	Copyright (c) Roan Embrechts
	Copyright (c) Bart Mollet

	For a full list of contributors, see "credits.txt".
	The full license can be read in "license.txt".

	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.

	See the GNU General Public License for more details.

	Contact: Dokeos, 181 rue Royale, B-1000 Brussels, Belgium, info@dokeos.com
===============================================================================
*/
/**
==============================================================================
*	@package dokeos.group
==============================================================================
*/
/*
===============================================================================
       DOKEOS INIT SETTINGS
===============================================================================
*/
// name of the language file that needs to be included
$language_file = "group";
require_once ('../inc/global.inc.php');
$this_section = SECTION_COURSES;

require_once (api_get_path(LIBRARY_PATH).'groupmanager.lib.php');
require_once (api_get_path(LIBRARY_PATH).'classmanager.lib.php');
require_once (api_get_path(LIBRARY_PATH).'course.lib.php');
require_once (api_get_path(LIBRARY_PATH).'formvalidator/FormValidator.class.php');
/*
--------------------------------------
        Create the groups
--------------------------------------
*/
if (isset ($_POST['action']))
{
	switch ($_POST['action'])
	{
		case 'create_groups' :
			$groups = array ();

			for ($i = 0; $i < $_POST['number_of_groups']; $i ++)
			{
				$group1['name'] = api_strlen($_POST['group_'.$i.'_name']) == 0 ? get_lang('Group').' '.$i : $_POST['group_'.$i.'_name'] ;
				$group1['category'] = isset($_POST['group_'.$i.'_category'])?$_POST['group_'.$i.'_category']:null;
				$group1['tutor'] = isset($_POST['group_'.$i.'_tutor'])?$_POST['group_'.$i.'_tutor']:null;
				$group1['places'] = isset($_POST['group_'.$i.'_places'])?$_POST['group_'.$i.'_places']:null;
				$groups[] = $group1;
			}

			foreach ($groups as $index => $group)
			{
				if (!empty($_POST['same_tutor']))
				{
					$group['tutor'] = $_POST['group_0_tutor'];
				}
				if (!empty($_POST['same_places']))
				{
					$group['places'] = $_POST['group_0_places'];
				}
				if (api_get_setting('allow_group_categories') == 'false')
				{
					$group['category'] = DEFAULT_GROUP_CATEGORY;
				}
				elseif ($_POST['same_category'])
				{
					$group['category'] = $_POST['group_0_category'];
				}
				GroupManager :: create_group(strip_tags($group['name']),$group['category'],$group['tutor'] , $group['places']);
			}
			$msg = urlencode(count($groups).' '.get_lang('GroupsAdded'));
			header('Location: group.php?action=show_msg&msg='.$msg);
			break;
		case 'create_virtual_groups' :
			$ids = GroupManager :: create_groups_from_virtual_courses();
			$msg = urlencode(count($ids).' '.get_lang('GroupsAdded'));
			header('Location: group.php?action=show_msg&msg='.$msg);
			break;
		case 'create_subgroups' :
			GroupManager :: create_subgroups($_POST['base_group'], $_POST['number_of_groups']);
			$msg = urlencode($_POST['number_of_groups'].' '.get_lang('GroupsAdded'));
			header('Location: group.php?action=show_msg&msg='.$msg);
			break;
		case 'create_class_groups' :
			$ids = GroupManager :: create_class_groups($_POST['group_category']);
			$msg = urlencode(count($ids).' '.get_lang('GroupsAdded'));
			header('Location: group.php?action=show_msg&msg='.$msg);
			break;
	}
}
$nameTools = get_lang('GroupCreation');
$interbreadcrumb[] = array ("url" => "group.php", "name" => get_lang('Groups'));
Display :: display_header($nameTools, "Group");

if (!api_is_allowed_to_edit(false,true))
{
	api_not_allowed();
}
/*
===============================================================================
       MAIN TOOL CODE
===============================================================================
*/
/*
--------------------------------------
        Show group-settings-form
--------------------------------------
*/
elseif (isset ($_POST['number_of_groups']))
{
	if (!is_numeric($_POST['number_of_groups']) || intval($_POST['number_of_groups']) < 1)
	{
		Display :: display_error_message(get_lang('PleaseEnterValidNumber').'<br/><br/><a href="group_creation.php?'.api_get_cidreq().'">&laquo; '.get_lang('Back').'</a>',false);
	}
	else
	{
	$number_of_groups = intval($_POST['number_of_groups']);
	if ($number_of_groups > 1)
	{
		
?>
	<script type="text/javascript">
	<!--
	var number_of_groups = <?php echo $number_of_groups; ?>;
	function switch_state(key)
	{
		for( i=1; i<number_of_groups; i++)
		{
			element = document.getElementById(key+'_'+i);
			element.disabled = !element.disabled;
			disabled = element.disabled;
		}
		ref = document.getElementById(key+'_0');
		if( disabled )
		{
			ref.addEventListener("change", copy, false);
		}
		else
		{
			ref.removeEventListener("change", copy, false);
		}
		copy_value(key);
	}
	function copy(e)
	{
		key = e.currentTarget.id;
		var re = new RegExp ('_0', '') ;
		var key = key.replace(re, '') ;
		copy_value(key);
	}
	function copy_value(key)
	{
		ref = document.getElementById(key+'_0');
		for( i=1; i<number_of_groups; i++)
		{
			element = document.getElementById(key+'_'+i);
			element.value = ref.value;
		}
	}
	-->
	</script>
	<?php


	}
	$group_categories = GroupManager :: get_categories();
	$group_id = GroupManager :: get_number_of_groups() + 1;
	/*$tutors = GroupManager :: get_all_tutors();
	$tutor_options[0] = get_lang('GroupNoTutor');
	foreach ($tutors as $index => $tutor)
	{
		$tutor_options[$tutor['user_id']] = api_get_person_name($tutor['firstname'], $tutor['lastname']);
	}
	$cat_options = array ();
	*/
	foreach ($group_categories as $index => $category)
	{
		// Don't allow new groups in the virtual course category!
		if ($category['id'] != VIRTUAL_COURSE_CATEGORY)
		{
			$cat_options[$category['id']] = $category['title'];
		}
	}
	$form = new FormValidator('create_groups_step2');

	// Modify the default templates
	$renderer = & $form->defaultRenderer();
	$form_template = "<form {attributes}>\n<div>\n<table>\n{content}\n</table>\n</div>\n</form>";
	$renderer->setFormTemplate($form_template);
	$element_template = <<<EOT
	<tr>
		<td>
			<!-- BEGIN required --><span class="form_required">*</span> <!-- END required -->{label}
		</td>
		<td>
			<!-- BEGIN error --><span class="form_error">{error}</span><br /><!-- END error -->	{element}
		</td>
	</tr>

EOT;
	$renderer->setElementTemplate($element_template);
	$form->addElement('header', '', $nameTools);

	$form->addElement('hidden', 'action');
	$form->addElement('hidden', 'number_of_groups');
	$defaults = array ();
	// Table heading
	$group_el = array ();
	$group_el[] = & $form->createElement('static', null, null, '<b>'.get_lang('GroupName').'</b>');
	if (api_get_setting('allow_group_categories') == 'true')
	{
		$group_el[] = & $form->createElement('static', null, null, '<b>'.get_lang('GroupCategory').'</b>');
	}
	//$group_el[] = & $form->createElement('static', null, null, '<b>'.get_lang('GroupTutor').'</b>');
	$group_el[] = & $form->createElement('static', null, null, '<b>'.get_lang('GroupPlacesThis').'</b>');
	$form->addGroup($group_el, 'groups', null, "\n</td>\n<td>\n", false);
	// Checkboxes
	if ($_POST['number_of_groups'] > 1)
	{
		$group_el = array ();
		$group_el[] = & $form->createElement('static', null, null, ' ');
		if (api_get_setting('allow_group_categories') == 'true')
		{
			$group_el[] = & $form->createElement('checkbox', 'same_category', null, get_lang('SameForAll'), array ('onclick' => "javascript:switch_state('category')"));
		}
		//$group_el[] = & $form->createElement('checkbox', 'same_tutor', null, get_lang('SameForAll'), array ('onclick' => "javascript:switch_state('tutor')"));
		$group_el[] = & $form->createElement('checkbox', 'same_places', null, get_lang('SameForAll'), array ('onclick' => "javascript:switch_state('places')"));
		$form->addGroup($group_el, 'groups', null, '</td><td>', false);
	}
	// Properties for all groups
	for ($group_number = 0; $group_number < $_POST['number_of_groups']; $group_number ++)
	{
		$group_el = array ();
		$group_el[] = & $form->createElement('text', 'group_'.$group_number.'_name');
		if (api_get_setting('allow_group_categories') == 'true')
		{
			$group_el[] = & $form->createElement('select', 'group_'.$group_number.'_category', null, $cat_options, array ('id' => 'category_'.$group_number));
		}
		//$group_el[] = & $form->createElement('select', 'group_'.$group_number.'_tutor', null, $tutor_options, array ('id' => 'tutor_'.$group_number));
		$group_el[] = & $form->createElement('text', 'group_'.$group_number.'_places', null, array ('size' => 3, 'id' => 'places_'.$group_number));
		

		if($_POST['number_of_groups']<10000)
		{
			if ($group_id<10)
			{
				$prev='000';
			}
			elseif ($group_id<100)
			{
				$prev='00';
			}
			elseif ($group_id<1000)
			{
				$prev='0';
			}
			else
			{
				$prev='';
			}
		}		
				
		$defaults['group_'.$group_number.'_name'] = get_lang('GroupSingle').' '.$prev.$group_id ++;		
		
		$form->addGroup($group_el, 'group_'.$group_number, null, '</td><td>', false);
	}
	$defaults['action'] = 'create_groups';
	$defaults['number_of_groups'] = intval($_POST['number_of_groups']);
	$form->setDefaults($defaults);
	$form->addElement('style_submit_button', 'submit', get_lang('CreateGroup'), 'class="save"');
	$form->display();
	}
}
else
{
	/*
	 * Show form to generate new groups
	 */
	$categories = GroupManager :: get_categories();
	//echo '<blockquote>';
	if (count($categories) > 1 || isset ($categories[0]) && $categories[0]['id'] != VIRTUAL_COURSE_CATEGORY)
	{
		$create_groups_form = new FormValidator('create_groups');
		$create_groups_form->addElement('header', '', $nameTools);
		$group_el = array ();
		$group_el[] = & $create_groups_form->createElement('static', null, null, get_lang('Create'));
		$group_el[] = & $create_groups_form->createElement('text', 'number_of_groups', null, array ('size' => 3));
		$group_el[] = & $create_groups_form->createElement('static', null, null, get_lang('NewGroups'));
		$group_el[] = & $create_groups_form->createElement('style_submit_button', 'submit', get_lang('ProceedToCreateGroup'), 'class="save"');
		$create_groups_form->addGroup($group_el, 'create_groups', null, ' ', false);
		$defaults = array ();
		$defaults['number_of_groups'] = 1;
		$create_groups_form->setDefaults($defaults);
		$create_groups_form->display();
	}
	else
	{
		echo get_lang('NoCategoriesDefined');
	}
	//echo '</blockquote>';
	/*
	 * Show form to generate groups from virtual courses
	 */
	$virtual_courses = CourseManager :: get_virtual_courses_linked_to_real_course($_course['sysCode']);
	if (count($virtual_courses) > 0)
	{
		echo '<b>'.get_lang('CreateGroupsFromVirtualCourses').'</b>';
		echo '<blockquote>';
		echo get_lang('CreateGroupsFromVirtualCoursesInfo');
		$create_virtual_groups_form = new FormValidator('create_virtual_groups');
		$create_virtual_groups_form->addElement('hidden', 'action');
		$create_virtual_groups_form->addElement('submit', 'submit', get_lang('Ok'));
		$create_virtual_groups_form->setDefaults(array ('action' => 'create_virtual_groups'));
		$create_virtual_groups_form->display();
		echo '</blockquote>';
	}
	/*
	 * Show form to generate subgroups
	 */
	if (api_get_setting('allow_group_categories') == 'true' && count(GroupManager :: get_group_list()) > 0)
	{
		$base_group_options = array ();
		$groups = GroupManager :: get_group_list();
		foreach ($groups as $index => $group)
		{
			$number_of_students = GroupManager :: number_of_students($group['id']);
			if ($number_of_students > 0)
			{
				$base_group_options[$group['id']] = $group['name'].' ('.$number_of_students.' '.get_lang('Users').')';
			}
		}
		if (count($base_group_options) > 0)
		{
			echo '<b>'.get_lang('CreateSubgroups').'</b>';
			echo '<blockquote>';
			echo '<p>'.get_lang('CreateSubgroupsInfo').'</p>';
			$create_subgroups_form = new FormValidator('create_subgroups');
			$create_subgroups_form->addElement('hidden', 'action');
			$group_el = array ();
			$group_el[] = & $create_subgroups_form->createElement('static', null, null, get_lang('CreateNumberOfGroups'));
			$group_el[] = & $create_subgroups_form->createElement('text', 'number_of_groups', null, array ('size' => 3));
			$group_el[] = & $create_subgroups_form->createElement('static', null, null, get_lang('WithUsersFrom'));
			$group_el[] = & $create_subgroups_form->createElement('select', 'base_group', null, $base_group_options);
			$group_el[] = & $create_subgroups_form->createElement('submit', 'submit', get_lang('Ok'));
			$create_subgroups_form->addGroup($group_el, 'create_groups', null, ' ', false);
			$defaults = array ();
			$defaults['action'] = 'create_subgroups';
			$create_subgroups_form->setDefaults($defaults);
			$create_subgroups_form->display();
			echo '</blockquote>';
		}
	}
	/*
	 * Show form to generate groups from classes subscribed to the course
	 */
	$classes = ClassManager :: get_classes_in_course($_course['sysCode']);
	if (count($classes) > 0)
	{
		echo '<b>'.get_lang('GroupsFromClasses').'</b>';
		echo '<blockquote>';
		echo '<p>'.get_lang('GroupsFromClassesInfo').'</p>';
		echo '<ul>';
		foreach ($classes as $index => $class)
		{
			$number_of_users = count(ClassManager :: get_users($class['id']));
			echo '<li>';
			echo $class['name'];
			echo ' ('.$number_of_users.' '.get_lang('Users').')';
			echo '</li>';
		}
		echo '</ul>';

		$create_class_groups_form = new FormValidator('create_class_groups_form');
		$create_class_groups_form->addElement('hidden', 'action');
		if (api_get_setting('allow_group_categories') == 'true')
		{
			$group_categories = GroupManager :: get_categories();
			$cat_options = array ();
			foreach ($group_categories as $index => $category)
			{
				// Don't allow new groups in the virtual course category!
				if ($category['id'] != VIRTUAL_COURSE_CATEGORY)
				{
					$cat_options[$category['id']] = $category['title'];
				}
			}
			$create_class_groups_form->addElement('select', 'group_category', null, $cat_options);
		}
		else
		{
			$create_class_groups_form->addElement('hidden', 'group_category');
		}
		$create_class_groups_form->addElement('submit', 'submit', get_lang('Ok'));
		$defaults['group_category'] = DEFAULT_GROUP_CATEGORY;
		$defaults['action'] = 'create_class_groups';
		$create_class_groups_form->setDefaults($defaults);
		$create_class_groups_form->display();
		echo '</blockquote>';
	}
}
/*
===============================================================================
       DOKEOS FOOTER
===============================================================================
*/
Display :: display_footer();
?>