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

/**
 *	@package chamilo.group
 */

require_once '../inc/global.inc.php';
$this_section = SECTION_COURSES;
$current_course_tool  = TOOL_GROUP;

// Notice for unauthorized people.
api_protect_course_script(true);

if (!api_is_allowed_to_edit(false,true) ||
    !(isset ($_GET['id']) ||
    isset ($_POST['id']) ||
    isset ($_GET['action']) ||
    isset ($_POST['action']))
) {
	api_not_allowed();
}

/**
 * Function to check the given max number of members per group
 */
function check_max_number_of_members($value)
{
    $max_member_no_limit = $value['max_member_no_limit'];
    if ($max_member_no_limit == GroupManager::MEMBER_PER_GROUP_NO_LIMIT) {
        return true;
    }
    $max_member = $value['max_member'];
    return is_numeric($max_member);
}

/**
 * Function to check the number of groups per user
 */
function check_groups_per_user($value)
{
    $groups_per_user = $value['groups_per_user'];
    if (isset($_POST['id']) &&
        intval($groups_per_user) != GroupManager::GROUP_PER_MEMBER_NO_LIMIT &&
        GroupManager::get_current_max_groups_per_user($_POST['id']) > intval($groups_per_user)) {
        return false;
    }
    return true;
}

if (api_get_setting('allow_group_categories') == 'true') {
    if (isset($_GET['id'])) {
        $category = GroupManager::get_category($_GET['id']);
        $nameTools = get_lang('EditGroupCategory').': '.$category['title'];
    } else {
        $nameTools = get_lang('AddCategory');
        // Default values for new category
        $category = array(
            'groups_per_user' => 1,
            'doc_state' => GroupManager::TOOL_PRIVATE,
            'work_state' => GroupManager::TOOL_PRIVATE,
            'wiki_state' => GroupManager::TOOL_PRIVATE ,
            'chat_state' => GroupManager::TOOL_PRIVATE,
            'calendar_state' => GroupManager::TOOL_PRIVATE,
            'announcements_state'=> GroupManager::TOOL_PRIVATE,
            'forum_state' => GroupManager::TOOL_PRIVATE,
            'max_student' => 0
        );
    }
} else {
    $category = GroupManager::get_category($_GET['id']);
    $nameTools = get_lang('PropModify');
}

$htmlHeadXtra[] = '<script>
$(document).ready( function() {
    $("#max_member").on("focus", function() {
        $("#max_member_selected").attr("checked", true);
    });
});
 </script>';

$interbreadcrumb[] = array ('url' => 'group.php', 'name' => get_lang('Groups'));

$course_id = api_get_course_int_id();

// Build the form
if (isset($_GET['id'])) {
	// Update settings of existing category
	$action = 'update_settings';
	$form = new FormValidator('group_category', 'post', '?id='.$category['id']);
	$form->addElement('hidden', 'id');
} else {
    // Checks if the field was created in the table Category. It creates it if is neccesary
    $table_category = Database :: get_course_table(TABLE_GROUP_CATEGORY);
    if (!Database::query("SELECT wiki_state FROM $table_category WHERE c_id = $course_id")) {
        Database::query("ALTER TABLE $table_category ADD wiki_state tinyint(3) UNSIGNED NOT NULL default '1' WHERE c_id = $course_id");
    }
	// Create a new category
	$action = 'add_category';
	$form = new FormValidator('group_category');
}

// If categories allowed, show title & description field
if (api_get_setting('allow_group_categories') == 'true') {
    $form->addElement('header', $nameTools);
    $form->addElement('html', '<div class="row"><div class="col-md-6">');
	$form->addText('title', get_lang('Title'));

    // Groups per user
    $possible_values = array();
    for ($i = 1; $i <= 10; $i ++) {
        $possible_values[$i] = $i;
    }
    $possible_values[GroupManager::GROUP_PER_MEMBER_NO_LIMIT] = get_lang('All');
    $group = array(
        $form->createElement('select', 'groups_per_user', null, $possible_values),
        $form->createElement('static', null, null, get_lang('QtyOfUserCanSubscribe_PartAfterNumber'))
    );
    $form->addGroup($group, 'limit_group', get_lang('QtyOfUserCanSubscribe_PartBeforeNumber'), ' ', false);
    $form->addRule('limit_group', get_lang('MaxGroupsPerUserInvalid'), 'callback', 'check_groups_per_user');

    // Members per group
    $group = array(
        $form->createElement('radio', 'max_member_no_limit', get_lang('GroupLimit'), get_lang('NoLimit'), GroupManager::MEMBER_PER_GROUP_NO_LIMIT),
        $form->createElement('radio', 'max_member_no_limit', null, get_lang('MaximumOfParticipants'), 1, array('id' => 'max_member_selected')),
        $form->createElement('text', 'max_member', null, array('class' => 'span1', 'id' => 'max_member')),
        $form->createElement('static', null, null, ' '.get_lang('GroupPlacesThis'))
    );
    $form->addGroup($group, 'max_member_group', get_lang('GroupLimit'), '', false);
    $form->addRule('max_member_group', get_lang('InvalidMaxNumberOfMembers'), 'callback', 'check_max_number_of_members');

    $form->addElement('html', '</div>');

    $form->addElement('html', '<div class="col-md-6">');
    // Description
    $form->addElement('textarea', 'description', get_lang('Description'), array ('rows' => 6));
    $form->addElement('html', '</div>');
    $form->addElement('html', '</div>');
} else {
	$form->addElement('hidden', 'title');
	$form->addElement('hidden', 'description');
}

$form->addElement('header', get_lang('DefaultSettingsForNewGroups'));
$form->addElement('hidden', 'action');
$form->addElement('html', '<div class="col-md-6">');

// Self registration
$group = array(
    $form->createElement('checkbox', 'self_reg_allowed', get_lang('GroupSelfRegistration'), get_lang('GroupAllowStudentRegistration'), 1),
    $form->createElement('checkbox', 'self_unreg_allowed', null, get_lang('GroupAllowStudentUnregistration'), 1)
);
$form->addGroup($group, '', Display::return_icon('user.png', get_lang('GroupSelfRegistration'), array(), ICON_SIZE_SMALL).' '.get_lang('GroupSelfRegistration'), '', false);

// Documents settings.
$group = array(
    $form->createElement('radio', 'doc_state', get_lang('GroupDocument'), get_lang('NotAvailable'), GroupManager::TOOL_NOT_AVAILABLE),
    $form->createElement('radio', 'doc_state', null, get_lang('Public'), GroupManager::TOOL_PUBLIC),
    $form->createElement('radio', 'doc_state', null, get_lang('Private'), GroupManager::TOOL_PRIVATE)
);
$form->addGroup($group, '', Display::return_icon('folder.png', get_lang('GroupDocument'), array(), ICON_SIZE_SMALL).' '.get_lang('GroupDocument'), '', false);

// Work settings.
$group = array(
    $form->createElement('radio', 'work_state', get_lang('GroupWork'), get_lang('NotAvailable'), GroupManager::TOOL_NOT_AVAILABLE),
    $form->createElement('radio', 'work_state', null, get_lang('Public'), GroupManager::TOOL_PUBLIC),
    $form->createElement('radio', 'work_state', null, get_lang('Private'), GroupManager::TOOL_PRIVATE)
);
$form->addGroup($group, '', Display::return_icon('work.png', get_lang('GroupWork'), array(), ICON_SIZE_SMALL).' '.get_lang('GroupWork'), '', false);

// Calendar settings.
$group = array(
    $form->createElement('radio', 'calendar_state', get_lang('GroupCalendar'), get_lang('NotAvailable'), GroupManager::TOOL_NOT_AVAILABLE),
    $form->createElement('radio', 'calendar_state', null, get_lang('Public'), GroupManager::TOOL_PUBLIC),
    $form->createElement('radio', 'calendar_state', null, get_lang('Private'), GroupManager::TOOL_PRIVATE)
);
$form->addGroup($group, '', Display::return_icon('agenda.png', get_lang('GroupCalendar'), array(), ICON_SIZE_SMALL).' '.get_lang('GroupCalendar'), '', false);

$form->addElement('html', '</div>');
$form->addElement('html', '<div class="col-md-6">');

// Announcements settings.
$group = array(
    $form->createElement('radio', 'announcements_state', get_lang('GroupAnnouncements'), get_lang('NotAvailable'), GroupManager::TOOL_NOT_AVAILABLE),
    $form->createElement('radio', 'announcements_state', null, get_lang('Public'), GroupManager::TOOL_PUBLIC),
    $form->createElement('radio', 'announcements_state', null, get_lang('Private'), GroupManager::TOOL_PRIVATE)
);
$form->addGroup($group, '', Display::return_icon('announce.png', get_lang('GroupAnnouncements'), array(), ICON_SIZE_SMALL).' '.get_lang('GroupAnnouncements'), '', false);

// Forum settings.
$group = array(
    $form->createElement('radio', 'forum_state', get_lang('GroupForum'), get_lang('NotAvailable'), GroupManager::TOOL_NOT_AVAILABLE),
    $form->createElement('radio', 'forum_state', null, get_lang('Public'), GroupManager::TOOL_PUBLIC),
    $form->createElement('radio', 'forum_state', null, get_lang('Private'), GroupManager::TOOL_PRIVATE)
);
$form->addGroup($group, '', Display::return_icon('forum.png', get_lang('GroupForum'), array(), ICON_SIZE_SMALL).' '.get_lang('GroupForum'), '', false);

// Wiki settings.
$group = array(
    $form->createElement('radio', 'wiki_state', get_lang('GroupWiki'), get_lang('NotAvailable'), GroupManager::TOOL_NOT_AVAILABLE),
    $form->createElement('radio', 'wiki_state', null, get_lang('Public'), GroupManager::TOOL_PUBLIC),
    $form->createElement('radio', 'wiki_state', null, get_lang('Private'), GroupManager::TOOL_PRIVATE)
);
$form->addGroup($group, '', Display::return_icon('wiki.png', get_lang('GroupWiki'), array(), ICON_SIZE_SMALL).' '.get_lang('GroupWiki'), '', false);

// Chat settings.
$group = array(
    $form->createElement('radio', 'chat_state', get_lang('Chat'), get_lang('NotAvailable'), GroupManager::TOOL_NOT_AVAILABLE),
    $form->createElement('radio', 'chat_state', null, get_lang('Public'), GroupManager::TOOL_PUBLIC),
    $form->createElement('radio', 'chat_state', null, get_lang('Private'), GroupManager::TOOL_PRIVATE)
);
$form->addGroup($group, '', Display::return_icon('chat.png', get_lang('Chat'), array(), ICON_SIZE_SMALL).' '.get_lang('Chat'), '', false);

$form->addElement('html', '</div>');
$form->addElement('html', '<div class="col-md-12">');

// Submit
$form->addButtonSave(get_lang('PropModify'), 'submit');

// If form validates -> save data
if ($form->validate()) {
    $values = $form->exportValues();
    if ($values['max_member_no_limit'] == GroupManager::MEMBER_PER_GROUP_NO_LIMIT) {
		$max_member = GroupManager::MEMBER_PER_GROUP_NO_LIMIT;
	} else {
		$max_member = $values['max_member'];
	}

	$self_reg_allowed = isset($values['self_reg_allowed']) ? $values['self_reg_allowed'] : 0;
	$self_unreg_allowed = isset($values['self_unreg_allowed']) ? $values['self_unreg_allowed'] : 0;

	switch ($values['action']) {
		case 'update_settings':
			GroupManager::update_category(
                $values['id'],
                $values['title'],
                $values['description'],
                $values['doc_state'],
                $values['work_state'],
                $values['calendar_state'],
                $values['announcements_state'],
                $values['forum_state'],
                $values['wiki_state'],
                $values['chat_state'],
                $self_reg_allowed,
                $self_unreg_allowed,
                $max_member,
                $values['groups_per_user']
            );
			$msg = urlencode(get_lang('GroupPropertiesModified'));
			header('Location: group.php?action=show_msg&msg='.$msg.'&category='.$values['id']);
			break;
		case 'add_category':
			GroupManager :: create_category(
                $values['title'],
                $values['description'],
                $values['doc_state'],
                $values['work_state'],
                $values['calendar_state'],
                $values['announcements_state'],
                $values['forum_state'],
                $values['wiki_state'],
                $values['chat_state'],
                $self_reg_allowed,
                $self_unreg_allowed,
                $max_member,
                $values['groups_per_user']
            );
			$msg = urlencode(get_lang('CategoryCreated'));
			header('Location: group.php?action=show_msg&msg='.$msg);
			break;
	}
}

// Else display the form
Display :: display_header($nameTools, 'Group');

// actions bar
echo '<div class="actions">';
echo '<a href="group.php">'.
    Display::return_icon('back.png', get_lang('BackToGroupList'),'',ICON_SIZE_MEDIUM).'</a>';
echo '</div>';

$defaults = $category;
$defaults['action'] = $action;
if ($defaults['max_student'] == GroupManager::MEMBER_PER_GROUP_NO_LIMIT) {
	$defaults['max_member_no_limit'] = GroupManager::MEMBER_PER_GROUP_NO_LIMIT;
} else {
	$defaults['max_member_no_limit'] = 1;
	$defaults['max_member'] = $defaults['max_student'];
}
$form->setDefaults($defaults);
$form->display();

Display :: display_footer();
