dyaskur / google-chat-poll

export default class TaskHandler {

  event: TaskEvent;

  public constructor(event: TaskEvent) {

    this.event = event;

  }

  async process(): Promise<void> {

    this.event.state = await this.getStateFromMessageId();

    switch (this.event.action) {

      case 'close_poll':

        if (this.event.state.closedBy) {

          console.log('the poll is already closed by ', this.event.state.closedBy);

          return;

        }

        if (!this.event.state.closedTime || this.event.state.closedTime > Date.now()) {

          this.event.state.closedTime = Date.now();

        }

        this.event.state.closedBy = 'scheduled auto-close';

        const apiResponse = await this.updatePollMessage(this.event.state);

        if (apiResponse?.status !== 200) {

          throw new Error('Error when closing message');

        }

        break;

      case 'remind_all':

        if (this.event.state.closedTime && this.event.state.closedTime > Date.now()) {

          await this.remindAll();

        }

        break;

      default:

        console.log('unknown task');

    }

  }

  async getStateFromMessageId(): Promise<PollState> {

    const request = {

      name: this.event.id,

    };

    const apiResponse = await callMessageApi('get', request);

    const currentState = getStateFromCardName(apiResponse.data!.cardsV2?.[0].card ?? {});

    if (!currentState) {

      throw new Error('State not found');

    }

    this.event.space = apiResponse.data!.space;

    this.event.thread = apiResponse.data!.thread;

    return JSON.parse(currentState) as PollState;

  }

  async updatePollMessage(currentState: PollState) {

    const localeTimezone = {locale: 'en', offset: 0, id: 'UTC'};

    const cardMessage = new PollCard(currentState, localeTimezone).createMessage();

    const request = {

      name: this.event.id,

      requestBody: cardMessage,

      updateMask: 'cardsV2',

    };

    return await callMessageApi('update', request);

  }

  async remindAll() {

    const text = `<users/all>, The poll with the topic *${this.event.state!.topic}*  is reaching its finale. Please wrap up your voting now.`;

    const request = {

      name: this.event.id,

      parent: this.event.space!.name,

      messageReplyOption: 'REPLY_MESSAGE_FALLBACK_TO_NEW_THREAD',

      requestBody: {

        text, thread: this.event.thread,

      },

    };

    return await callMessageApi('create', request);