Proyectos de Subversion Moodle

<?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/>.

namespace communication_customlink;

use core_communication\processor;

/**

 * class communication_feature to handle custom link specific actions.

 *

 * @package   communication_customlink

 * @copyright 2023 Michael Hawkins <michaelh@moodle.com>

 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class communication_feature implements

    \core_communication\communication_provider,

    \core_communication\form_provider,

    \core_communication\room_chat_provider {

    /** @var string The database table storing custom link specific data */

    protected const CUSTOMLINK_TABLE = 'communication_customlink';

    /** @var \cache_application $cache The application cache for this provider. */

    protected \cache_application $cache;

    /**

     * Load the communication provider for the communication API.

     *

     * @param processor $communication The communication processor object.

     * @return communication_feature The communication provider object.

     */

    public static function load_for_instance(processor $communication): self {

        return new self($communication);

    }

    /**

     * Constructor for communication provider.

     *

     * @param processor $communication The communication processor object.

     */

    private function __construct(

        private \core_communication\processor $communication,

    ) {

        $this->cache = \cache::make('communication_customlink', 'customlink');

    }

    /**

     * Create room - room existence managed externally, always return true.

     *

     * @return boolean

     */

    public function create_chat_room(): bool {

        return true;

    }

    /**

     * Update room - room existence managed externally, always return true.

     *

     * @return boolean

     */

    public function update_chat_room(): bool {

        return true;

    }

    /**

     * Delete room - room existence managed externally, always return true.

     *

     * @return boolean

     */

    public function delete_chat_room(): bool {

        return true;

    }

    /**

     * Fetch the URL for this custom link provider.

     *

     * @return string|null The custom URL, or null if not found.

     */

    public function get_chat_room_url(): ?string {

        global $DB;

        $commid = $this->communication->get_id();

        $cachekey = "link_url_{$commid}";

        // Attempt to fetch the room URL from the cache.

        if ($url = $this->cache->get($cachekey)) {

            return $url;

        }

        // If not found in the cache, fetch the URL from the database.

        $url = $DB->get_field(

            self::CUSTOMLINK_TABLE,

            'url',

            ['commid' => $commid],

        );

        // Cache the URL.

        $this->cache->set($cachekey, $url);

        return $url;

    }

    public function save_form_data(\stdClass $instance): void {

        if (empty($instance->customlinkurl)) {

            return;

        }

        global $DB;

        $commid = $this->communication->get_id();

        $cachekey = "link_url_{$commid}";

        $newrecord = new \stdClass();

        $newrecord->url = $instance->customlinkurl;

        $existingrecord = $DB->get_record(

            self::CUSTOMLINK_TABLE,

            ['commid' => $commid],

            'id, url'

        );

        if (!$existingrecord) {

            // Create the record if it does not exist.

            $newrecord->commid = $commid;

            $DB->insert_record(self::CUSTOMLINK_TABLE, $newrecord);

        } else if ($instance->customlinkurl !== $existingrecord->url) {

            // Update record if the URL has changed.

            $newrecord->id = $existingrecord->id;

            $DB->update_record(self::CUSTOMLINK_TABLE, $newrecord);

        } else {

            // No change made.

            return;

        }

        // Cache the new URL.

        $this->cache->set($cachekey, $newrecord->url);

    }

    public function set_form_data(\stdClass $instance): void {

        if (!empty($instance->id) && !empty($this->communication->get_id())) {

            $instance->customlinkurl = $this->get_chat_room_url();

        }

    }

    public static function set_form_definition(\MoodleQuickForm $mform): void {

        // Custom link description for the communication provider.

        $mform->insertElementBefore($mform->createElement(

            'text',

            'customlinkurl',

            get_string('customlinkurl', 'communication_customlink'),

            'maxlength="255" size="40"'

        ), 'addcommunicationoptionshere');

        $mform->addHelpButton('customlinkurl', 'customlinkurl', 'communication_customlink');

        $mform->setType('customlinkurl', PARAM_URL);

        $mform->addRule('customlinkurl', get_string('required'), 'required', null, 'client');

        $mform->addRule('customlinkurl', get_string('maximumchars', '', 255), 'maxlength', 255);

        $mform->insertElementBefore($mform->createElement(

            'static',

            'customlinkurlinfo',

            '',

            get_string('customlinkurlinfo', 'communication_customlink'),

            'addcommunicationoptionshere'

        ), 'addcommunicationoptionshere');

    }

    public static function is_configured(): bool {

        return true;

    }

}