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 mod_bigbluebuttonbn;

use cache;

use cm_info;

use mod_bigbluebuttonbn\local\extension\action_url_addons;

use mod_bigbluebuttonbn\local\extension\custom_completion_addons;

use mod_bigbluebuttonbn\local\extension\mod_form_addons;

use mod_bigbluebuttonbn\local\extension\mod_instance_helper;

use stdClass;

use core_plugin_manager;

/**

 * Generic subplugin management helper

 *

 * @package   mod_bigbluebuttonbn

 * @copyright 2023 onwards, Blindside Networks Inc

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

 * @author    Laurent David (laurent@call-learning.fr)

 */

class extension {

    /**

     * Plugin name for extension

     */

    const BBB_EXTENSION_PLUGIN_NAME = 'bbbext';

    /**

     * Invoke a subplugin hook that will return additional parameters

     *

     * @param string $action

     * @param array $data

     * @param array $metadata

     * @param int|null $instanceid

     * @return array associative array with the additional data and metadata (indexed by 'data' and

     * 'metadata' keys).

     */

    public static function action_url_addons(

        string $action = '',

        array $data = [],

        array $metadata = [],

        ?int $instanceid = null

    ): array {

        $allmutationclass = self::get_instances_implementing(action_url_addons::class);

        $additionaldata = [];

        $additionalmetadata = [];

        foreach ($allmutationclass as $mutationclass) {

            // Here we intentionally just pass data and metadata and not the result as we

            // do not want subplugin to assume that another subplugin is doing a modification.

            ['data' => $newdata, 'metadata' => $newmetadata] = $mutationclass->execute($action, $data, $metadata, $instanceid);

            $additionaldata = array_merge($additionaldata, $newdata ?? []);

            $additionalmetadata = array_merge($additionalmetadata, $newmetadata ?? []);

        }

        return [

            'data' => $additionaldata,

            'metadata' => $additionalmetadata

        ];

    }

    /**

     * Get new instance of classes that are named on the base of this classname and implementing this class

     *

     * @param string $classname

     * @param array|null $newparameters additional parameters for the constructor.

     * @return array

     */

    protected static function get_instances_implementing(string $classname, ?array $newparameters = []): array {

        $classes = self::get_classes_implementing($classname);

        sort($classes); // Make sure all extension classes are returned in the same order. This is arbitrarily in

        // alphabetical order and depends on the classname but this one way to ensure consistency across calls.

        return array_map(function($targetclassname) use ($newparameters) {

            // If $newparameters is null, the constructor will be called without parameters.

            return new $targetclassname(...$newparameters);

        }, $classes);

    }

    /**

     * Get classes are named on the base of this classname and implementing this class

     *

     * @param string $classname

     * @return array

     */

    protected static function get_classes_implementing(string $classname): array {

        // Get the class basename without Reflection API.

        $classnamecomponents = explode("\\", $classname);

        $classbasename = end($classnamecomponents);

        $allsubs = core_plugin_manager::instance()->get_plugins_of_type(self::BBB_EXTENSION_PLUGIN_NAME);

        $extensionclasses = [];

        foreach ($allsubs as $sub) {

            if (!$sub->is_enabled()) {

                continue;

            }

            $targetclassname = "\\bbbext_{$sub->name}\\bigbluebuttonbn\\$classbasename";

            if (!class_exists($targetclassname)) {

                continue;

            }

            if (!is_subclass_of($targetclassname, $classname)) {

                debugging("The class $targetclassname should extend $classname in the subplugin {$sub->name}. Ignoring.");

                continue;

            }

            $extensionclasses[] = $targetclassname;

        }

        return $extensionclasses;

    }

    /**

     * Get all custom_completion addons classes.

     *

     * @return array of custom completion addon classes.

     */

    public static function custom_completion_addons_classes(): array {

        return self::get_classes_implementing(custom_completion_addons::class);

    }

    /**

     * Get all custom_completion addons classes instances.

     *

     * @param cm_info $cm

     * @param int $userid

     * @param array|null $completionstate

     * @return array of custom completion addon instances.

     */

    public static function custom_completion_addons_instances(cm_info $cm, int $userid, ?array $completionstate = null): array {

        return self::get_instances_implementing(custom_completion_addons::class, [$cm, $userid, $completionstate]);

    }

    /**

     * Get all mod_form addons classes instances

     *

     * @param \MoodleQuickForm $mform

     * @param stdClass|null $bigbluebuttondata

     * @param string|null $suffix

     * @return array of custom completion addon classes instances

     */

    public static function mod_form_addons_instances(\MoodleQuickForm $mform, ?stdClass $bigbluebuttondata = null,

        string $suffix = null): array {

        return self::get_instances_implementing(mod_form_addons::class, [$mform, $bigbluebuttondata, $suffix]);

    }

    /**

     * Get additional join tables for instance when extension activated

     *

     * @return array of additional tables names. They all have a field called bigbluebuttonbnid that identifies the bbb instance.

     */

    public static function get_join_tables(): array {

        global $DB;

        // We use cache here as it will be called very often.

        $cache = cache::make('mod_bigbluebuttonbn', 'subplugins');

        if ($cache->get('additionaltables')) {

            return $cache->get('additionaltables');

        }

        $additionaltablesclasses = self::get_instances_implementing(mod_instance_helper::class);

        $tables = [];

        foreach ($additionaltablesclasses as $tableclass) {

            $tables = array_merge($tables, $tableclass->get_join_tables() ?? []);

        }

        // Warning and removal for tables that do not have the bigbluebuttonid field.

        foreach ($tables as $index => $table) {

            $columns = $DB->get_columns($table);

            if (empty($columns['bigbluebuttonbnid'])) {

                debugging("get_instance_additional_tables: $table should have a column named bigbluebuttonid");

                unset($tables[$index]);

            }

        }

        $cache->set('additionaltables', $tables);

        return $tables;

    }

    /**

     * Add instance processing

     *

     * @param stdClass $data data to persist

     * @return void

     */

    public static function add_instance(stdClass $data): void {

        $formmanagersclasses = self::get_instances_implementing(mod_instance_helper::class);

        foreach ($formmanagersclasses as $fmclass) {

            $fmclass->add_instance($data);

        }

    }

    /**

     * Update instance processing

     *

     * @param stdClass $data data to persist

     * @return void

     */

    public static function update_instance(stdClass $data): void {

        $formmanagersclasses = self::get_instances_implementing(mod_instance_helper::class);

        foreach ($formmanagersclasses as $fmclass) {

            $fmclass->update_instance($data);

        }

    }

    /**

     * Delete instance processing

     *

     * @param int $id instance id

     * @return void

     */

    public static function delete_instance(int $id): void {

        $formmanagersclasses = self::get_instances_implementing(mod_instance_helper::class);

        foreach ($formmanagersclasses as $fmclass) {

            $fmclass->delete_instance($id);

        }

    }

}