dyaskur / google-chat-poll

import {HttpFunction} from '@google-cloud/functions-framework';

import {chat_v1 as chatV1} from '@googleapis/chat';

import CommandHandler from './handlers/CommandHandler';

import MessageHandler from './handlers/MessageHandler';

import ActionHandler from './handlers/ActionHandler';

import {generateHelpText, welcomeButtonCard} from './helpers/helper';

import TaskHandler from './handlers/TaskHandler';

export const app: HttpFunction = async (req, res) => {

  if (!(req.method === 'POST' && req.body)) {

    console.log('unknown access', req.hostname, req.ips.join(','), req.method, JSON.stringify(req.body));

    res.status(400).send('');

  }

  const event = req.body;

  if (event.type === 'TASK') {

    await new TaskHandler(event).process();

    res.json('');

  }

  // console.log(JSON.stringify(event));

  console.log(event.type,

    event.common?.invokedFunction || event.message?.slashCommand?.commandId || event.message?.argumentText,

    event.user.displayName, event.user.email, event.space.type, event.space.name);

  let reply: chatV1.Schema$Message = {

    thread: event.message?.thread,

    actionResponse: {

      type: 'NEW_MESSAGE',

    },

    text: 'Hi! To create a poll, you can use the */poll* command. \n \n' +

      'Alternatively, you can create poll by mentioning me with question and answers. ' +

      'e.g *@Absolute Poll "Your Question" "Answer 1" "Answer 2"*',

  };

  // Dispatch slash and action events

  if (event.type === 'MESSAGE') {

    const message = event.message;

    if (message.slashCommand?.commandId) {

      reply = new CommandHandler(event).process();

    } else if (message.text) {

      reply = new MessageHandler(event).process();

    }

  } else if (event.type === 'CARD_CLICKED') {

    reply = await (new ActionHandler(event).process());

  } else if (event.type === 'ADDED_TO_SPACE') {

    const message: chatV1.Schema$Message = {

      text: undefined,

      cardsV2: undefined,

    };

    const spaceType = event.space.type;

    if (spaceType === 'ROOM') {

      message.text = generateHelpText();

    } else if (spaceType === 'DM') {

      message.text = generateHelpText(true);

    }

    message.cardsV2 = [welcomeButtonCard];

    reply = {

      actionResponse: {

        type: 'NEW_MESSAGE',

      },

      ...message,

    };

  }

  res.json(reply);

};