dyaskur / google-chat-poll

import NewPollFormCard from '../cards/NewPollFormCard';

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

import BaseHandler from './BaseHandler';

import {buildOptionsFromMessage} from '../helpers/utils';

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

export default class CommandHandler extends BaseHandler {

  private slashCommand: chatV1.Schema$SlashCommandMetadata | undefined;

  public constructor(event: chatV1.Schema$DeprecatedEvent) {

    super(event);

    this.parseSlashCommand();

    if (this.slashCommand === undefined) {

      throw new Error('No Slash Command found');

    }

  }

  parseSlashCommand() {

    this.getAnnotations().forEach((annotation) => {

      if (annotation.type === 'SLASH_COMMAND') {

        this.slashCommand = annotation.slashCommand!;

      }

    });

  }

  process(): chatV1.Schema$Message {

    switch (this.slashCommand!.commandName) {

      case '/poll':

        const argumentText = this.event.message?.argumentText?.trim() ?? '';

        const options = buildOptionsFromMessage(argumentText);

        return {

          actionResponse: {

            type: 'DIALOG',

            dialogAction: {

              dialog: {

                body: new NewPollFormCard(options, this.getUserTimezone()).create(),

              },

            },

          },

        };

      default:

        const isPrivate = this.event.space?.type === 'DM';

        return {

          thread: this.event.message!.thread,

          actionResponse: {

            type: 'NEW_MESSAGE',

          },

          text: generateHelpText(isPrivate),

        };

    }

  }

}