function ouwiki_update_instance($data, $mform)
{
global $CFG, $DB;
$data->id = $data->instance;
// Update main record.
$DB->update_record('ouwiki', $data);
// Set up null values
$nullvalues = array('editbegin', 'editend', 'timeout');
foreach ($nullvalues as $nullvalue) {
if (empty($data->{$nullvalue})) {
unset($data->{$nullvalue});
$DB->set_field('ouwiki', $nullvalue, null, array('id' => $data->id));
}
}
if (strlen(preg_replace('/(<.*?>)|(&.*?;)|\\s/', '', $data->intro)) == 0) {
unset($data->intro);
$DB->set_field('ouwiki', 'intro', null, array('id' => $data->id));
}
ouwiki_grade_item_update($data);
if (!($cm = get_coursemodule_from_id('ouwiki', $data->coursemodule))) {
print_error('invalidcoursemodule');
}
// Checking course instance.
$course = $DB->get_record('course', array('id' => $data->course), '*', MUST_EXIST);
if ($filename = $mform->get_new_filename('template_file')) {
// Delete any previous template files.
$cmid = $data->coursemodule;
$context = context_module::instance($cmid);
$fs = get_file_storage();
$fs->delete_area_files($context->id, 'mod_ouwiki', 'template', $data->id);
// Add template file.
$file = $mform->save_stored_file('template_file', $context->id, 'mod_ouwiki', 'template', $data->id, '/', $filename);
$DB->set_field('ouwiki', 'template', '/' . $file->get_filename(), array('id' => $data->id));
// Check for empty wikis (i.e. wikis without a start page already created).
$subwikis = ouwiki_get_subwikis($data->id);
$ouwiki = $DB->get_record_select('ouwiki', 'id = ?', array($data->id));
foreach ($subwikis as $subwiki) {
if (!ouwiki_subwiki_content_exists($subwiki->id)) {
// Amend any empty wikis from template.
ouwiki_init_pages($course, $cm, $ouwiki, $subwiki);
}
}
}
return true;
}
} else {
$wikiob->selectordefault = $wikisubwiki->id;
}
}
} else {
if ($wikiinst->subwikis == OUWIKI_SUBWIKIS_GROUPS) {
// Group wiki. Get all groups user can see (checking they have content to import).
if (!($groups = groups_get_activity_allowed_groups($wikiact))) {
continue;
}
$default = groups_get_activity_group($wikiact);
foreach ($groups as $group) {
// Check group subwiki has content before adding it.
if ($wikisubwiki = $DB->get_record_select('ouwiki_subwikis', 'wikiid = ?
AND groupid = ? AND userid IS NULL', array($wikiinst->id, $group->id), 'id')) {
if (ouwiki_subwiki_content_exists($wikisubwiki->id)) {
$wikiob->selector[$wikisubwiki->id] = format_string($group->name);
if ($group->id == $default) {
$wikiob->selectordefault = $wikisubwiki->id;
}
}
}
}
// If no groups have content disable wiki selector.
if (empty($wikiob->selector)) {
$wikiob->nocontent = true;
}
} else {
if ($wikiinst->subwikis == OUWIKI_SUBWIKIS_INDIVIDUAL) {
// Individual wiki. Get all users user can view (checking subwiki for content).
$userfields = user_picture::fields('u', null, 'uid');
