<?php namespace App\ModelSerializers\Summit\Presentation;
/**
 * Copyright 2019 OpenStack Foundation
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 **/
use models\summit\SummitPresentationComment;
use ModelSerializers\SerializerRegistry;
use ModelSerializers\SilverStripeSerializer;
/**
 * Class SummitPresentationCommentSerializer
 * @package App\ModelSerializers\Summit\Presentation
 */
final class SummitPresentationCommentSerializer extends SilverStripeSerializer
{
    protected static $array_mappings = [
        'Body'           => 'body:json_string',
        'Activity'       => 'is_activity:json_boolean',
        'Public'         => 'is_public:json_boolean',
        'CreatorId'      => 'creator_id:json_int',
        'PresentationId' => 'presentation_id:json_int',
    ];

    /**
     * @param null $expand
     * @param array $fields
     * @param array $relations
     * @param array $params
     * @return array
     */
    public function serialize($expand = null, array $fields = array(), array $relations = array(), array $params = array())
    {
        if (!count($relations)) $relations = $this->getAllowedRelations();

        $comment = $this->object;

        if (!$comment instanceof SummitPresentationComment) return [];

        $values = parent::serialize($expand, $fields, $relations, $params);
        if (!empty($expand)) {
            foreach (explode(',', $expand) as $relation) {
                switch (trim($relation)) {
                    case 'creator':{
                        if($comment->getCreatorId() > 0) {
                            unset($values['creator_id']);
                            $values['creator'] = SerializerRegistry::getInstance()->getSerializer($comment->getCreator())->serialize();
                        }
                    }
                    break;
                }
            }
        }
        return $values;
    }
}