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<?php
/**
* The main group management user interface.
*
* @copyright &copy; 2006 The Open University
* @author N.D.Freear AT open.ac.uk
* @author J.White AT open.ac.uk
* @license http://www.gnu.org/copyleft/gpl.html GNU Public License
* @package groups
*/
require_once('../config.php');
require_once('lib.php');
ini_set('include_path', $CFG->libdir.'/pear'.PATH_SEPARATOR.ini_get('include_path'));
require_once('HTML/AJAX/JSON.php');
require_js('yui_yahoo');
require_js('yui_dom');
require_js('yui_utilities');
require_js('yui_connection');
require_js($CFG->wwwroot.'/group/clientlib.js');
$courseid = required_param('id', PARAM_INT);
$groupid = optional_param('group', false, PARAM_INT);
$userid = optional_param('user', false, PARAM_INT);
$action = groups_param_action();
// Support either single group= parameter, or array groups[]
if ($groupid) {
$groupids=array($groupid);
} else {
$groupids=array();
if (isset($_REQUEST['groups'])) {
foreach ($_REQUEST['groups'] as $groupid) {
if ($groupid = clean_param($groupid, PARAM_INT)) {
$groupids[]=$groupid;
}
}
}
}
$singlegroup=count($groupids) == 1;
$returnurl = $CFG->wwwroot.'/group/index.php?id='.$courseid;
// Get the course information so we can print the header and
// check the course id is valid
if (!$course = get_record('course', 'id',$courseid)) {
$success = false;
print_error('invalidcourse'); //'The course ID is invalid'
}
// Make sure that the user has permissions to manage groups.
require_login($course);
$context = get_context_instance(CONTEXT_COURSE, $courseid);
if (! has_capability('moodle/course:managegroups', $context)) {
redirect(); //"group.php?id=$course->id"); // Not allowed to see all groups
}
// Check for multiple/no group errors
if(!$singlegroup) {
switch($action) {
case 'ajax_getmembersingroup':
case 'showgroupsettingsform':
case 'showaddmembersform':
case 'updatemembers':
print_error('errorselectone','group',$returnurl);
}
}
switch ($action) {
case false: //OK, display form.
break;
case 'ajax_getmembersingroup':
$roles = array();
if ($groupmemberroles = groups_get_members_by_role($groupids[0],$courseid,'u.id,u.firstname,u.lastname')) {
foreach($groupmemberroles as $roleid=>$roledata) {
$shortroledata=new StdClass;
$shortroledata->name=$roledata->name;
$shortroledata->users=array();
foreach($roledata->users as $member) {
$shortmember=new StdClass;
$shortmember->id=$member->id;
$shortmember->name=fullname($member, true);
$shortroledata->users[]=$shortmember;
}
$roles[]=$shortroledata;
}
}
echo json_encode($roles);
die; // Client side JavaScript takes it from here.
case 'deletegroup':
if(count($groupids)==0) {
print_error('errorselectsome','group',$returnurl);
}
$groupidlist=implode(',',$groupids);
redirect('delete.php?courseid='.$courseid.'&groups='.$groupidlist);
break;
case 'showcreateorphangroupform':
redirect('group.php?courseid='.$courseid);
break;
case 'showautocreategroupsform':
redirect('autogroup.php?courseid='.$courseid);
break;
case 'showgroupsettingsform':
redirect('group.php?courseid='.$courseid.'&amp;id='.$groupids[0]);
break;
case 'updategroups': //Currently reloading.
break;
case 'removemembers':
break;
case 'showaddmembersform':
redirect('members.php?group='.$groupids[0]);
break;
case 'updatemembers': //Currently reloading.
break;
default: //ERROR.
if (debugging()) {
error('Error, unknown button/action. Probably a user-interface bug!', $returnurl);
break;
}
}
// Print the page and form
$strgroups = get_string('groups');
$strparticipants = get_string('participants');
$navlinks = array(array('name'=>$strparticipants, 'link'=>$CFG->wwwroot.'/user/index.php?id='.$courseid, 'type'=>'misc'),
array('name'=>$strgroups, 'link'=>'', 'type'=>'misc'));
$navigation = build_navigation($navlinks);
/// Print header
print_header_simple($strgroups, ': '.$strgroups, $navigation, '', '', true, '', navmenu($course));
// Add tabs
$currenttab = 'groups';
require('tabs.php');
$disabled = 'disabled="disabled"';
if (ajaxenabled()) {
// Some buttons are enabled if single group selected
$showaddmembersform_disabled = $singlegroup ? '' : $disabled;
$showeditgroupsettingsform_disabled = $singlegroup ? '' : $disabled;
$deletegroup_disabled = count($groupids)>0 ? '' : $disabled;
} else {
// Do not disable buttons. The buttons work based on the selected group,
// which you can change without reloading the page, so it is not appropriate
// to disable them if no group is selected.
$showaddmembersform_disabled = '';
$showeditgroupsettingsform_disabled = '';
$deletegroup_disabled = '';
}
print_heading(format_string($course->shortname) .' '.$strgroups, 'center', 3);
echo '<form id="groupeditform" action="index.php" method="post">'."\n";
echo '<div>'."\n";
echo '<input type="hidden" name="id" value="' . $courseid . '" />'."\n";
echo '<table cellpadding="6" class="generaltable generalbox groupmanagementtable boxaligncenter" summary="">'."\n";
echo '<tr>'."\n";
echo "<td>\n";
// NO GROUPINGS YET!
echo '<p><label for="groups"><span id="groupslabel">'.get_string('groups').':</span><span id="thegrouping">&nbsp;</span></label></p>'."\n";
if (ajaxenabled()) {
$onchange = 'membersCombo.refreshMembers();';
} else {
$onchange = '';
}
echo '<select name="groups[]" multiple="multiple" id="groups" size="15" class="select" onchange="'.$onchange.'"'."\n";
echo ' onclick="window.status=this.selectedIndex==-1 ? \'\' : this.options[this.selectedIndex].title;" onmouseout="window.status=\'\';">'."\n";
$groups = groups_get_all_groups($courseid);
$selectedname = '&nbsp;';
if ($groups) {
// Print out the HTML
foreach ($groups as $group) {
$select = '';
$usercount = (int)count_records('groups_members', 'groupid', $group->id);
$groupname = format_string($group->name).' ('.$usercount.')';
if (in_array($group->id,$groupids)) {
$select = ' selected="selected"';
if ($singlegroup) {
// Only keep selected name if there is one group selected
$selectedname = $groupname;
}
}
echo "<option value=\"{$group->id}\"$select title=\"$groupname\">$groupname</option>\n";
}
} else {
// Print an empty option to avoid the XHTML error of having an empty select element
echo '<option>&nbsp;</option>';
}
echo '</select>'."\n";
echo '<p><input type="submit" name="act_updatemembers" id="updatemembers" value="'
. get_string('showmembersforgroup', 'group') . '" /></p>'."\n";
echo '<p><input type="submit" '. $showeditgroupsettingsform_disabled . ' name="act_showgroupsettingsform" id="showeditgroupsettingsform" value="'
. get_string('editgroupsettings', 'group') . '" /></p>'."\n";
echo '<p><input type="submit" '. $deletegroup_disabled . ' name="act_deletegroup" onclick="onDeleteGroup()" id="deletegroup" value="'
. get_string('deleteselectedgroup', 'group') . '" /></p>'."\n";
echo '<p><input type="submit" name="act_showcreateorphangroupform" id="showcreateorphangroupform" value="'
. get_string('creategroup', 'group') . '" /></p>'."\n";
echo '<p><input type="submit" name="act_showautocreategroupsform" id="showautocreategroupsform" value="'
. get_string('autocreategroups', 'group') . '" /></p>'."\n";
echo '</td>'."\n";
echo '<td>'."\n";
echo '<p><label for="members"><span id="memberslabel">'.
get_string('membersofselectedgroup', 'group').
' </span><span id="thegroup">'.$selectedname.'</span></label></p>'."\n";
//NOTE: the SELECT was, multiple="multiple" name="user[]" - not used and breaks onclick.
echo '<select name="user" id="members" size="15" class="select"'."\n";
echo ' onclick="window.status=this.options[this.selectedIndex].title;" onmouseout="window.status=\'\';">'."\n";
$member_names = array();
$atleastonemember = false;
if ($singlegroup) {
if ($groupmemberroles = groups_get_members_by_role($groupids[0],$courseid,'u.id,u.firstname,u.lastname')) {
foreach($groupmemberroles as $roleid=>$roledata) {
echo '<optgroup label="'.htmlspecialchars($roledata->name).'">';
foreach($roledata->users as $member) {
echo '<option value="'.$member->id.'">'.fullname($member, true).'</option>';
$atleastonemember = true;
}
echo '</optgroup>';
}
}
}
if (!$atleastonemember) {
// Print an empty option to avoid the XHTML error of having an empty select element
echo '<option>&nbsp;</option>';
}
echo '</select>'."\n";
echo '<p><input type="submit" ' . $showaddmembersform_disabled . ' name="act_showaddmembersform" '
. 'id="showaddmembersform" value="' . get_string('adduserstogroup', 'group'). '" /></p>'."\n";
echo '</td>'."\n";
echo '</tr>'."\n";
echo '</table>'."\n";
//<input type="hidden" name="rand" value="om" />
echo '</div>'."\n";
echo '</form>'."\n";
if (ajaxenabled()) {
echo '<script type="text/javascript">'."\n";
echo '//<![CDATA['."\n";
echo 'var groupsCombo = new UpdatableGroupsCombo("'.$CFG->wwwroot.'", '.$course->id.');'."\n";
echo 'var membersCombo = new UpdatableMembersCombo("'.$CFG->wwwroot.'", '.$course->id.');'."\n";
echo '//]]>'."\n";
echo '</script>'."\n";
}
print_footer($course);
/**
* Returns the first button action with the given prefix, taken from
* POST or GET, otherwise returns false.
* See /lib/moodlelib.php function optional_param.
* @param $prefix 'act_' as in 'action'.
* @return string The action without the prefix, or false if no action found.
*/
function groups_param_action($prefix = 'act_') {
$action = false;
//($_SERVER['QUERY_STRING'] && preg_match("/$prefix(.+?)=(.+)/", $_SERVER['QUERY_STRING'], $matches)) { //b_(.*?)[&;]{0,1}/
if ($_POST) {
$form_vars = $_POST;
}
elseif ($_GET) {
$form_vars = $_GET;
}
if ($form_vars) {
foreach ($form_vars as $key => $value) {
if (preg_match("/$prefix(.+)/", $key, $matches)) {
$action = $matches[1];
break;
}
}
}
if ($action && !preg_match('/^\w+$/', $action)) {
$action = false;
error('Action had wrong type.');
}
///if (debugging()) echo 'Debug: '.$action;
return $action;
}
?>
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