SlackController.php

namespace App\Http\Controllers;

use GuzzleHttp\Client;
use Illuminate\Http\Request;
use Illuminate\Http\Response;
use Illuminate\Support\Facades\Log;

class SlackController extends Controller
{
    const BOT_TOKEN = 'YOUR_TOKEN';

    /**
     * /yukyu のSlashコマンドを実行すると呼ばれる場所
     *
     * @param Request $request
     * @return Response
     */
    function yukyuDialog (Request $request) {
        $url = 'https://slack.com/api/dialog.open';
        $token = self::BOT_TOKEN;
        $dialog = $this->getYukyuDialog();
        $trigger_id = $request->input('trigger_id');

        $params = [
            'token' =>  $token,
            'dialog' => \GuzzleHttp\json_encode($dialog),
            'trigger_id' => $trigger_id
        ];

        $client = new Client();

        $response = $client->request(
            'POST',
            $url, // URLを設定
            ['query' => $params] // パラメーターがあれば設定
        );
        Log::info(print_r($response, true));

        return response('',200);
    }

    /**
     * ダイアログから送られてくるリクエストを受け取る
     * 他のリクエストからの受け口になるので callback_id などで場合分けする必要がある
     *
     * @param Request $request
     * @return Response
     */
    function interactiveMessage (Request $request) {
        $payload = $request->input('payload');
        $postData = \GuzzleHttp\json_decode($payload, true);

        $text = '以下の内容で受け付けました！';
        $channel =  $postData['channel']['id'];
        $user =  $postData['user']['id'];
        $submission = $postData['submission'];
        $dialog = $this->getYukyuDialog();
        $attachment = $this->makeAttachment($dialog, $submission);
        $this->postEphemeral($channel, $user, $text, $attachment);

        return response('',200);
    }

    /**
     * 「あなただけに表示されています」のメッセージを送る
     * 
     * @param $channel
     * @param $user
     * @param $text
     * @param $attachment
     */
    function postEphemeral ($channel, $user, $text, $attachment) {
        $url = 'https://slack.com/api/chat.postEphemeral';
        $token = self::BOT_TOKEN;

        $params = [
            'token' => $token,
            'attachments' => $attachment,
            'channel' => $channel,
            'text' => $text,
            'user' => $user,
        ];

        $client = new Client();
        $response = $client->request(
            'POST',
            $url,
            ['query' => $params]
        );
        Log::info(print_r($response, true));
    }

    /**
     * 回答を受け取った結果をまとめる
     *
     * @param $dialog
     * @param $submission
     * @return string
     */
    function makeAttachment ($dialog, $submission) {
        $elements = $dialog['elements'];
        $attachment = [];

        $text =  "";
        foreach ($submission as $key => $value) {
            foreach ($elements as $element) {
                if ($element['name'] === $key) {
                    $label = $element['label'];
                    $answer = '';
                    if (isset($element['options'])) {
                        $options = $element['options'];
                        foreach ($options as $option) {
                            if ($option['value'] === $value) {
                                $answer = $option['label'];
                            }
                        }
                    } else {
                        $answer = $value;
                    }
                    $text .= $label . ' : ' . $answer. "\n";
                }
            }
        }

        $attachment[] = [
            'text' => $text,
        ];

        return \GuzzleHttp\json_encode($attachment);
    }

    /**
     * ダイアログのテンプレートを作る
     *
     * @return array
     */
    function getYukyuDialog () {
        return [
            "callback_id" => "yukyu",
            "title" => "休暇申請ダイアログ",
            "submit_label" => "送信",
            "state" => "none",
            "elements" => [
                [
                    "type" => "select",
                    "label" => "休暇種類",
                    "name" =>  "holiday_type",
                    "options" => [
                        [
                            "label" => "有給休暇",
                            "value" => "type-full"
                        ],
                        [
                            "label" => "午前休暇",
                            "value" => "type-am"
                        ],
                        [
                            "label" => "午後休暇",
                            "value" => "type-pm"
                        ]
                    ],
                ],
                [
                    "type" => "text",
                    "label" => "休暇予定日",
                    "name" => "date",
                    "placeholder" => "2020-01-01",
                ],
                [
                    "type" => "textarea",
                    "label" => "休暇理由",
                    "name" =>  "reason",
                    "hint" => "理由を記入してください",
                ]
            ],
        ];
    }
}