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

/**
 *    This script displays an area where teachers can edit the group properties and member list.
 *    Groups are also often called "teams" in the Dokeos code.
 *
 * @author various contributors
 * @author Roan Embrechts (VUB), partial code cleanup, initial virtual course support
 * @package chamilo.group
 * @todo course admin functionality to create groups based on who is in which course (or class).
 */

/*	INIT SECTION */

// Name of the language file that needs to be included
$language_file = 'group';

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

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

$group_id = api_get_group_id();
$current_group = GroupManager :: get_group_properties($group_id);

$nameTools = get_lang('EditGroup');
$interbreadcrumb[] = array('url' => 'group.php', 'name' => get_lang('Groups'));
$interbreadcrumb[] = array('url' => 'group_space.php?'.api_get_cidReq(), 'name' => $current_group['name']);

$is_group_member = GroupManager :: is_tutor_of_group(api_get_user_id(), $group_id);

if (!api_is_allowed_to_edit(false, true) && !$is_group_member) {
    api_not_allowed(true);
}

/*	FUNCTIONS */

/**
 *  List all users registered to the course
 */
function search_members_keyword($firstname, $lastname, $username, $official_code, $keyword)
{
    if (api_strripos($firstname, $keyword) !== false || api_strripos($lastname, $keyword) !== false || api_strripos(
        $username,
        $keyword
    ) !== false || api_strripos($official_code, $keyword) !== false
    ) {
        return true;
    } else {
        return false;
    }
}


/**
 * function to sort users after getting the list in the db. Necessary because there are 2 or 3 queries. Called by usort()
 */
function sort_users($user_a, $user_b)
{
    if (api_sort_by_first_name()) {
        $cmp = api_strcmp($user_a['firstname'], $user_b['firstname']);
        if ($cmp !== 0) {
            return $cmp;
        } else {
            $cmp = api_strcmp($user_a['lastname'], $user_b['lastname']);
            if ($cmp !== 0) {
                return $cmp;
            } else {
                return api_strcmp($user_a['username'], $user_b['username']);
            }
        }
    } else {
        $cmp = api_strcmp($user_a['lastname'], $user_b['lastname']);
        if ($cmp !== 0) {
            return $cmp;
        } else {
            $cmp = api_strcmp($user_a['firstname'], $user_b['firstname']);
            if ($cmp !== 0) {
                return $cmp;
            } else {
                return api_strcmp($user_a['username'], $user_b['username']);
            }
        }
    }
}

/**
 * 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 if the number of selected group members is valid
 */
function check_group_members($value)
{
    if ($value['max_member_no_limit'] == GroupManager::MEMBER_PER_GROUP_NO_LIMIT) {
        return true;
    }
    if (isset($value['max_member']) && isset($value['group_members']) && $value['max_member'] < count(
        $value['group_members']
    )
    ) {
        return array('group_members' => get_lang('GroupTooMuchMembers'));
    }
    return true;
}

/*	MAIN CODE */

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

// Build form
$form = new FormValidator('group_edit', 'post', api_get_self().'?'.api_get_cidreq());

$form->addElement('header', $nameTools);
$form->addElement('hidden', 'action');
$form->addElement('hidden', 'referer');

// Group name
$form->add_textfield('name', get_lang('GroupName'));

// Description
$form->addElement('textarea', 'description', get_lang('Description'), array('class' => 'span6', 'rows' => 6));

//Getting course info
$course = $app['orm.em']->getRepository('Entity\Course')->find(api_get_course_int_id());

//Getting subscribed students
$subscribedUsers = $app['orm.em']->getRepository('Entity\Course')->getSubscribedStudents($course);
$subscribedUsers = $subscribedUsers->getQuery();
$subscribedUsers = $subscribedUsers->execute();

//Getting all users
$complete_user_list = array();
foreach ($subscribedUsers as $user) {
    $complete_user_list[$user->getUserId()] = $user->getCompleteNameWithClasses();
}

$possible_users = array();
foreach ($complete_user_list as $userId => $user) {
    $possible_users[$userId] = $user;
}

// Group tutors
$group_tutor_list = GroupManager :: get_subscribed_tutors($current_group['id']);
$selected_users = array();
$selected_tutors = array();
foreach ($group_tutor_list as $index => $user) {
    $selected_tutors[] = $user['user_id'];
}
$group_tutors_element = $form->addElement('advmultiselect', 'group_tutors', get_lang('GroupTutors'), $possible_users);
$group_tutors_element->setButtonAttributes('add');
$group_tutors_element->setButtonAttributes('remove');

// Group members
$group_member_list = GroupManager :: get_subscribed_users($current_group['id']);

$selected_users = array();
foreach ($group_member_list as $userId => $userName) {
    $selected_users[] = $userId;
}


// possible : number_groups_left > 0 and is group member
$possible_users = array();

foreach ($complete_user_list as $userId => $userName) {
    $possible_users[$userId] = $userName;
}

$group_members_element = $form->addElement(
    'advmultiselect',
    'group_members',
    get_lang('GroupMembers'),
    $possible_users
);

$group_members_element->setButtonAttributes('add');
$group_members_element->setButtonAttributes('remove');
$form->addFormRule('check_group_members');

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

// Self registration
$group = array();
$group[] = $form->createElement(
    'checkbox',
    'self_registration_allowed',
    get_lang('GroupSelfRegistration'),
    get_lang('GroupAllowStudentRegistration'),
    1
);
$group[] = $form->createElement(
    'checkbox',
    'self_unregistration_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();
$group[] = $form->createElement(
    'radio',
    'doc_state',
    get_lang('GroupDocument'),
    get_lang('NotAvailable'),
    GroupManager::TOOL_NOT_AVAILABLE
);
$group[] = $form->createElement('radio', 'doc_state', null, get_lang('Public'), GroupManager::TOOL_PUBLIC);
$group[] = $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();
$group[] = $form->createElement(
    'radio',
    'work_state',
    get_lang('GroupWork'),
    get_lang('NotAvailable'),
    GroupManager::TOOL_NOT_AVAILABLE
);
$group[] = $form->createElement('radio', 'work_state', null, get_lang('Public'), GroupManager::TOOL_PUBLIC);
$group[] = $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();
$group[] = $form->createElement(
    'radio',
    'calendar_state',
    get_lang('GroupCalendar'),
    get_lang('NotAvailable'),
    GroupManager::TOOL_NOT_AVAILABLE
);
$group[] = $form->createElement('radio', 'calendar_state', null, get_lang('Public'), GroupManager::TOOL_PUBLIC);
$group[] = $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
);

// Announcements settings
$group = array();
$group[] = $form->createElement(
    'radio',
    'announcements_state',
    get_lang('GroupAnnouncements'),
    get_lang('NotAvailable'),
    GroupManager::TOOL_NOT_AVAILABLE
);
$group[] = $form->createElement('radio', 'announcements_state', null, get_lang('Public'), GroupManager::TOOL_PUBLIC);
$group[] = $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();
$group[] = $form->createElement(
    'radio',
    'forum_state',
    get_lang('GroupForum'),
    get_lang('NotAvailable'),
    GroupManager::TOOL_NOT_AVAILABLE
);
$group[] = $form->createElement('radio', 'forum_state', null, get_lang('Public'), GroupManager::TOOL_PUBLIC);
$group[] = $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();
$group[] = $form->createElement(
    'radio',
    'wiki_state',
    get_lang('GroupWiki'),
    get_lang('NotAvailable'),
    GroupManager::TOOL_NOT_AVAILABLE
);
$group[] = $form->createElement('radio', 'wiki_state', null, get_lang('Public'), GroupManager::TOOL_PUBLIC);
$group[] = $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();
$group[] = $form->createElement(
    'radio',
    'chat_state',
    get_lang('Chat'),
    get_lang('NotAvailable'),
    GroupManager::TOOL_NOT_AVAILABLE
);
$group[] = $form->createElement('radio', 'chat_state', null, get_lang('Public'), GroupManager::TOOL_PUBLIC);
$group[] = $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
);

// submit button
$form->addElement('style_submit_button', 'submit', get_lang('SaveSettings'), 'class="save"');

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'];
    }
    $self_registration_allowed = isset($values['self_registration_allowed']) ? 1 : 0;
    $self_unregistration_allowed = isset($values['self_unregistration_allowed']) ? 1 : 0;
    GroupManager :: set_group_properties(
        $current_group['id'],
        strip_tags($values['name']),
        strip_tags($values['description']),
        $max_member,
        $values['doc_state'],
        $values['work_state'],
        $values['calendar_state'],
        $values['announcements_state'],
        $values['forum_state'],
        $values['wiki_state'],
        $values['chat_state'],
        $self_registration_allowed,
        $self_unregistration_allowed
    );

    // Storing the tutors (we first remove all the tutors and then add only those who were selected)
    GroupManager :: unsubscribe_all_tutors($current_group['id']);
    if (isset ($_POST['group_tutors']) && count($_POST['group_tutors']) > 0) {
        GroupManager :: subscribe_tutors($values['group_tutors'], $current_group['id']);
    }

    // Storing the users (we first remove all users and then add only those who were selected)
    GroupManager :: unsubscribe_all_users($current_group['id']);
    if (isset ($_POST['group_members']) && count($_POST['group_members']) > 0) {
        GroupManager :: subscribe_users($values['group_members'], $current_group['id']);
    }

    // Returning to the group area (note: this is inconsistent with the rest of chamilo)
    $cat = GroupManager :: get_category_from_group($current_group['id']);
    if (isset($_POST['group_members']) && count(
        $_POST['group_members']
    ) > $max_member && $max_member != GroupManager::MEMBER_PER_GROUP_NO_LIMIT
    ) {
        header(
            'Location: group.php?'.api_get_cidreq(true, false).'&action=warning_message&msg='.get_lang(
                'GroupTooMuchMembers'
            )
        );
    } else {
        header(
            'Location: group.php?'.api_get_cidreq(true, false).'&action=success_message&msg='.get_lang(
                'GroupSettingsModified'
            ).'&category='.$cat['id']
        );
    }
    exit;
}

$defaults = $current_group;
$defaults['group_members'] = $selected_users;
$defaults['group_tutors'] = $selected_tutors;
$action = isset($_GET['action']) ? $_GET['action'] : '';
$defaults['action'] = $action;
if ($defaults['maximum_number_of_students'] == 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['maximum_number_of_students'];
}


if (!empty($_GET['keyword']) && !empty($_GET['submit'])) {
    $keyword_name = Security::remove_XSS($_GET['keyword']);
    echo '<br/>'.get_lang('SearchResultsFor').' <span style="font-style: italic ;"> '.$keyword_name.' </span><br>';
}

Display :: display_header($nameTools, 'Group');

//@todo fix this
if (isset($_GET['show_message_warning'])) {
    echo Display::display_warning_message($_GET['show_message_warning']);
}

if (isset($_GET['show_message_sucess'])) {
    echo Display::display_normal_message($_GET['show_message_sucess']);
}

$form->setDefaults($defaults);
$form->display();

Display :: display_footer();