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<?php
// This file is part of Moodle - https://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 <https://www.gnu.org/licenses/>.

namespace core_blog\external;

use core_external\external_api;
use core_external\external_function_parameters;
use core_external\external_single_structure;
use core_external\external_value;
use core_external\external_warnings;
use context_course;
use moodle_exception;

/**
 * This is the external method for deleting a blog post entry.
 *
 * @package    core_blog
 * @copyright  2024 Juan Leyva <juan@moodle.com>
 * @category   external
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class delete_entry extends external_api {

/**
     * Describes the external function parameters.
     *
     * @return external_function_parameters
     */
    public static function execute_parameters(): external_function_parameters {
        return new external_function_parameters(
            [
                'entryid' => new external_value(PARAM_INT, 'The entry id to remove.'),
            ]
        );
    }

/**
     * Deletes a blog entry.
     *
     * @param int $entryid The entry id to remove.
     * @throws moodle_exception;
     * @return array result of the operation
     */
    public static function execute(int $entryid): array {
        global $USER, $CFG;

require_once($CFG->dirroot . '/blog/lib.php');
        require_once($CFG->dirroot . '/blog/locallib.php');

$params = self::validate_parameters(self::execute_parameters(), ['entryid' => $entryid]);

if (empty($CFG->enableblogs)) {
            throw new moodle_exception('blogdisable', 'blog');
        }

if (!$entry = new \blog_entry($params['entryid'])) {
            throw new moodle_exception('wrongentryid', 'blog');
        }

$courseid = !empty($entry->courseid) ? $entry->courseid : SITEID;
        $context = context_course::instance($courseid);

self::validate_context($context);

if (!blog_user_can_edit_entry($entry)) {
            throw new \moodle_exception('nopermissionstodeleteentry', 'blog');
        }

$entry->delete();

$result = [
            'status' => true,
            'warnings' => [],
        ];
        return $result;
    }

/**
     * Return.
     *
     * @return external_single_structure
     */
    public static function execute_returns() : external_single_structure {
        return new external_single_structure(
            [
                'status' => new external_value(PARAM_BOOL, 'True indicates the entry was deleted.'),
                'warnings' => new external_warnings(),
            ]
        );
    }
}

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