1:  2:  3:  4:  5:  6:  7:  8:  9: 10: 11: 12: 13: 14: 15: 16: 17: 18: 19: 20: 21: 22: 23: 24: 25: 26: 27: 28: 29: 30: 31: 32: 33: 34: 35: 36: 37: 38: 39: 40: 41: 42: 43: 44: 45: 46: 47: 48: 49: 50: 51: 52: 53: 54: 55: 56: 57: 58: 59: 60: 61: 62: 63: 64: 65: 66: 67: 68: 69: 70: 71: 72: 73: 74: 75: 76: 77: 78: 79: 80: 81: 

<?php

/**
 * Copyright 2016 LINE Corporation
 *
 * LINE Corporation licenses this file to you 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:
 *
 *   https://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.
 */

namespace LINE\LINEBot\MessageBuilder;

use LINE\LINEBot\Constant\MessageType;
use LINE\LINEBot\MessageBuilder;

/**
 * A builder class for text message.
 *
 * @package LINE\LINEBot\MessageBuilder
 */
class TextMessageBuilder implements MessageBuilder
{
    /** @var string[] */
    private $texts;
    /** @var array */
    private $message = [];

    /**
     * TextMessageBuilder constructor.
     *
     * Exact signature of this constructor is <code>new TextMessageBuilder(string $text, string[] $extraTexts)</code>.
     *
     * Means, this constructor can also receive multiple messages like so;
     *
     * <code>
     * $textBuilder = new TextMessageBuilder('text', 'extra text1', 'extra text2', ...);
     * </code>
     *
     * @param string $text
     * @param string[]|null $extraTexts
     */
    public function __construct($text, $extraTexts = null)
    {
        $extra = [];
        if (!is_null($extraTexts)) {
            $args = func_get_args();
            $extra = array_slice($args, 1);
        }
        $this->texts = array_merge([$text], $extra);
    }

    /**
     * Builds text message structure.
     *
     * @return array
     */
    public function buildMessage()
    {
        if (!empty($this->message)) {
            return $this->message;
        }

        foreach ($this->texts as $text) {
            $this->message[] = [
                'type' => MessageType::TEXT,
                'text' => $text,
            ];
        }

        return $this->message;
    }
}