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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle 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 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* The library file for the memcached cache store.
*
* This file is part of the memcached cache store, it contains the API for interacting with an instance of the store.
*
* @package cachestore_memcached
* @copyright 2012 Sam Hemelryk
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
require_once($CFG->dirroot.'/cache/forms.php');
require_once($CFG->dirroot.'/cache/stores/memcached/lib.php');
/**
* Form for adding a memcached instance.
*
* @copyright 2012 Sam Hemelryk
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class cachestore_memcached_addinstance_form extends cachestore_addinstance_form {
/**
* Adds the desired form elements.
*/
protected function configuration_definition() {
global $OUTPUT;
$form = $this->_form;
$version = phpversion('memcached');
$hasrequiredversion = ($version || version_compare($version, cachestore_memcached::REQUIRED_VERSION, '>='));
if (!$hasrequiredversion) {
$notify = new \core\output\notification(nl2br(get_string('upgrade200recommended', 'cachestore_memcached')),
\core\output\notification::NOTIFY_WARNING);
$form->addElement('html', $OUTPUT->render($notify));
}
$form->addElement('textarea', 'servers', get_string('servers', 'cachestore_memcached'), array('cols' => 75, 'rows' => 5));
$form->addHelpButton('servers', 'servers', 'cachestore_memcached');
$form->addRule('servers', get_string('required'), 'required');
$form->setType('servers', PARAM_RAW);
$form->addElement('selectyesno', 'compression', get_string('usecompression', 'cachestore_memcached'));
$form->addHelpButton('compression', 'usecompression', 'cachestore_memcached');
$form->setDefault('compression', 1);
$form->setType('compression', PARAM_BOOL);
$serialiseroptions = cachestore_memcached::config_get_serialiser_options();
$form->addElement('select', 'serialiser', get_string('useserialiser', 'cachestore_memcached'), $serialiseroptions);
$form->addHelpButton('serialiser', 'useserialiser', 'cachestore_memcached');
$form->setDefault('serialiser', Memcached::SERIALIZER_PHP);
$form->setType('serialiser', PARAM_INT);
$form->addElement('text', 'prefix', get_string('prefix', 'cachestore_memcached'), array('size' => 16));
$form->setType('prefix', PARAM_TEXT); // We set to text but we have a rule to limit to alphanumext.
$form->addHelpButton('prefix', 'prefix', 'cachestore_memcached');
$form->addRule('prefix', get_string('prefixinvalid', 'cachestore_memcached'), 'regex', '#^[a-zA-Z0-9\-_]+$#');
$form->setForceLtr('prefix');
$hashoptions = cachestore_memcached::config_get_hash_options();
$form->addElement('select', 'hash', get_string('hash', 'cachestore_memcached'), $hashoptions);
$form->addHelpButton('hash', 'hash', 'cachestore_memcached');
$form->setDefault('serialiser', Memcached::HASH_DEFAULT);
$form->setType('serialiser', PARAM_INT);
$form->addElement('selectyesno', 'bufferwrites', get_string('bufferwrites', 'cachestore_memcached'));
$form->addHelpButton('bufferwrites', 'bufferwrites', 'cachestore_memcached');
$form->setDefault('bufferwrites', 0);
$form->setType('bufferwrites', PARAM_BOOL);
if ($hasrequiredversion) {
// Only show this option if we have the required version of memcache extension installed.
// If it's not installed then this option does nothing, so there is no point in displaying it.
$form->addElement('selectyesno', 'isshared', get_string('isshared', 'cachestore_memcached'));
$form->addHelpButton('isshared', 'isshared', 'cachestore_memcached');
$form->setDefault('isshared', 0);
$form->setType('isshared', PARAM_BOOL);
}
$form->addElement('header', 'clusteredheader', get_string('clustered', 'cachestore_memcached'));
$form->addElement('checkbox', 'clustered', get_string('clustered', 'cachestore_memcached'));
$form->setDefault('checkbox', false);
$form->addHelpButton('clustered', 'clustered', 'cachestore_memcached');
$form->addElement('textarea', 'setservers', get_string('setservers', 'cachestore_memcached'),
array('cols' => 75, 'rows' => 5));
$form->addHelpButton('setservers', 'setservers', 'cachestore_memcached');
$form->disabledIf('setservers', 'clustered');
$form->setType('setservers', PARAM_RAW);
}
/**
* Perform minimal validation on the settings form.
*
* @param array $data
* @param array $files
*/
public function validation($data, $files) {
$errors = parent::validation($data, $files);
if (isset($data['clustered']) && ($data['clustered'] == 1)) {
// Set servers is required with in cluster mode.
if (!isset($data['setservers'])) {
$errors['setservers'] = get_string('required');
} else {
$trimmed = trim($data['setservers']);
if (empty($trimmed)) {
$errors['setservers'] = get_string('required');
}
}
$validservers = false;
if (isset($data['servers'])) {
$servers = trim($data['servers']);
$servers = explode("\n", $servers);
if (count($servers) === 1) {
$validservers = true;
}
}
if (!$validservers) {
$errors['servers'] = get_string('serversclusterinvalid', 'cachestore_memcached');
}
}
return $errors;
}
}