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✏️ Editing: can_view.php

<?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\external\systemreports;

use core_external\external_api;
use core_external\external_multiple_structure;
use core_external\external_single_structure;
use core_external\external_function_parameters;
use core_external\external_value;
use core_reportbuilder\report_access_exception;
use core_reportbuilder\system_report_factory;

/**
 * External method for validating access to a system report
 *
 * @package     core_reportbuilder
 * @copyright   2023 Paul Holden <paulh@moodle.com>
 * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class can_view extends external_api {

/**
     * External method parameters
     *
     * @return external_function_parameters
     */
    public static function execute_parameters(): external_function_parameters {
        return new external_function_parameters([
            'source' => new external_value(PARAM_RAW, 'Report class path'),
            'context' => self::get_context_parameters(),
            'component' => new external_value(PARAM_COMPONENT, 'Report component', VALUE_DEFAULT, ''),
            'area' => new external_value(PARAM_AREA, 'Report area', VALUE_DEFAULT, ''),
            'itemid' => new external_value(PARAM_INT, 'Report item ID', VALUE_DEFAULT, 0),
            'parameters' => new external_multiple_structure(
                new external_single_structure([
                    'name' => new external_value(PARAM_RAW),
                    'value' => new external_value(PARAM_RAW),
                ]),
                'Report parameters', VALUE_DEFAULT, []
            ),
        ]);
    }

/**
     * External method execution
     *
     * @param string $source
     * @param array $context
     * @param string $component
     * @param string $area
     * @param int $itemid
     * @param array[] $parameters
     * @return bool
     */
    public static function execute(
        string $source,
        array $context,
        string $component = '',
        string $area = '',
        int $itemid = 0,
        array $parameters = [],
    ): bool {

[
            'source' => $source,
            'context' => $context,
            'component' => $component,
            'area' => $area,
            'itemid' => $itemid,
            'parameters' => $parameters,
        ] = self::validate_parameters(self::execute_parameters(), [
            'source' => $source,
            'context' => $context,
            'component' => $component,
            'area' => $area,
            'itemid' => $itemid,
            'parameters' => $parameters,
        ]);

$context = self::get_context_from_params($context);
        self::validate_context($context);

// Flatten the report parameters.
        $parameters = array_combine(array_column($parameters, 'name'), array_column($parameters, 'value'));

try {
            $report = system_report_factory::create($source, $context, $component, $area, $itemid, $parameters);
            $report->require_can_view();
        } catch (report_access_exception $exception) {
            return false;
        }

return true;
    }

/**
     * External method return value
     *
     * @return external_value
     */
    public static function execute_returns(): external_value {
        return new external_value(PARAM_BOOL);
    }
}

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