1: <?php
 2: 
 3: /**
 4:  * Copyright 2016 LINE Corporation
 5:  *
 6:  * LINE Corporation licenses this file to you under the Apache License,
 7:  * version 2.0 (the "License"); you may not use this file except in compliance
 8:  * with the License. You may obtain a copy of the License at:
 9:  *
10:  *   https://www.apache.org/licenses/LICENSE-2.0
11:  *
12:  * Unless required by applicable law or agreed to in writing, software
13:  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
14:  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
15:  * License for the specific language governing permissions and limitations
16:  * under the License.
17:  */
18: 
19: namespace LINE\LINEBot\MessageBuilder\TemplateBuilder;
20: 
21: use LINE\LINEBot\Constant\TemplateType;
22: use LINE\LINEBot\MessageBuilder\TemplateBuilder;
23: 
24: /**
25:  * A builder class for carousel template.
26:  *
27:  * @package LINE\LINEBot\MessageBuilder\TemplateBuilder
28:  */
29: class CarouselTemplateBuilder implements TemplateBuilder
30: {
31:     /** @var CarouselColumnTemplateBuilder[] */
32:     private $columnTemplateBuilders;
33: 
34:     /** @var array */
35:     private $template;
36: 
37:     /**
38:      * CarouselTemplateBuilder constructor.
39:      *
40:      * @param CarouselColumnTemplateBuilder[] $columnTemplateBuilders
41:      */
42:     public function __construct(array $columnTemplateBuilders)
43:     {
44:         $this->columnTemplateBuilders = $columnTemplateBuilders;
45:     }
46: 
47:     /**
48:      * Builds carousel template structure.
49:      *
50:      * @return array
51:      */
52:     public function buildTemplate()
53:     {
54:         if (!empty($this->template)) {
55:             return $this->template;
56:         }
57: 
58:         $columns = [];
59:         foreach ($this->columnTemplateBuilders as $columnTemplateBuilder) {
60:             $columns[] = $columnTemplateBuilder->buildTemplate();
61:         }
62: 
63:         $this->template = [
64:             'type' => TemplateType::CAROUSEL,
65:             'columns' => $columns,
66:         ];
67: 
68:         return $this->template;
69:     }
70: }
71: