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/>.

declare(strict_types=1);

namespace core_reportbuilder;

use core_collator;

use core_component;

use core_plugin_manager;

use stdClass;

use core_reportbuilder\local\models\report;

use core_reportbuilder\local\report\base;

/**

 * Report management class

 *

 * @package     core_reportbuilder

 * @copyright   2020 Paul Holden <paulh@moodle.com>

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

 */

class manager {

    /** @var base $instances */

    private static $instances = [];

    /**

     * Return an instance of a report class from the given report persistent

     *

     * We statically cache the list of loaded reports per user during request lifecycle, to allow this method to be called

     * repeatedly without potential performance problems initialising the same report multiple times

     *

     * @param report $report

     * @param array $parameters

     * @return base

     * @throws source_invalid_exception

     * @throws source_unavailable_exception

     */

    public static function get_report_from_persistent(report $report, array $parameters = []): base {

        global $USER;

        // Cached instance per report/user, to account for initialization dependent on current user.

        $instancekey = $report->get('id') . ':' . ($USER->id ?? 0);

        if (!array_key_exists($instancekey, static::$instances)) {

            $source = $report->get('source');

            // Throw exception for invalid or unavailable report source.

            if (!self::report_source_exists($source)) {

                throw new source_invalid_exception($source);

            } else if (!self::report_source_available($source)) {

                throw new source_unavailable_exception($source);

            }

            static::$instances[$instancekey] = new $source($report, $parameters);

        }

        return static::$instances[$instancekey];

    }

    /**

     * Run reset code after tests to reset the instance cache

     */

    public static function reset_caches(): void {

        if (PHPUNIT_TEST || defined('BEHAT_TEST')) {

            static::$instances = [];

        }

    }

    /**

     * Return an instance of a report class from the given report ID

     *

     * @param int $reportid

     * @param array $parameters

     * @return base

     */

    public static function get_report_from_id(int $reportid, array $parameters = []): base {

        $report = new report($reportid);

        return self::get_report_from_persistent($report, $parameters);

    }

    /**

     * Verify that report source exists and extends appropriate base classes

     *

     * @param string $source Full namespaced path to report definition

     * @param string $additionalbaseclass Specify addition base class that given classname should extend

     * @return bool

     */

    public static function report_source_exists(string $source, string $additionalbaseclass = ''): bool {

        return (class_exists($source) && is_subclass_of($source, base::class) &&

            (empty($additionalbaseclass) || is_subclass_of($source, $additionalbaseclass)));

    }

    /**

     * Verify given report source is available. Note that it is assumed caller has already checked that it exists

     *

     * @param string $source

     * @return bool

     */

    public static function report_source_available(string $source): bool {

        return call_user_func([$source, 'is_available']);

    }

    /**

     * Create new report persistent

     *

     * @param stdClass $reportdata

     * @return report

     */

    public static function create_report_persistent(stdClass $reportdata): report {

        return (new report(0, $reportdata))->create();

    }

    /**

     * Return an array of all valid report sources across the site

     *

     * @return array[][] Indexed by [component => [class => name]]

     */

    public static function get_report_datasources(): array {

        $sources = array();

        $datasources = core_component::get_component_classes_in_namespace(null, 'reportbuilder\\datasource');

        foreach ($datasources as $class => $path) {

            if (self::report_source_exists($class, datasource::class) && self::report_source_available($class)) {

                // Group each report source by the component that it belongs to.

                [$component] = explode('\\', $class);

                if ($plugininfo = core_plugin_manager::instance()->get_plugin_info($component)) {

                    $componentname = $plugininfo->displayname;

                } else {

                    $componentname = get_string('site');

                }

                $sources[$componentname][$class] = call_user_func([$class, 'get_name']);

            }

        }

        // Order source for each component alphabetically.

        array_walk($sources, static function(array &$componentsources): void {

            core_collator::asort($componentsources);

        });

        return $sources;

    }

    /**

     * Configured site limit for number of custom reports threshold has been reached

     *

     * @return bool

     */

    public static function report_limit_reached(): bool {

        global $CFG;

        return (!empty($CFG->customreportslimit) &&

            (int) $CFG->customreportslimit <= report::count_records(['type' => base::TYPE_CUSTOM_REPORT]));

    }

}