dyaskur / google-chat-poll

import {choiceSection} from './helpers/vote';

import {ICON_URL_48X48} from './config/default';

import {chat_v1 as chatV1} from 'googleapis/build/src/apis/chat/v1';

import {PollState, Voter} from './helpers/interfaces';

/**

 * Builds the card header including the question and author details.

 *

 * @param {string} topic - Topic of the poll

 * @param {string} author - Display name of user that created the poll

 * @returns {chatV1.Schema$GoogleAppsCardV1CardHeader} card header

 */

function cardHeader(topic: string, author: string): chatV1.Schema$GoogleAppsCardV1CardHeader {

  return {

    title: topic,

    subtitle: `Posted by ${author}`,

    imageUrl: ICON_URL_48X48,

    imageType: 'CIRCLE',

  };

}

/**

 * Builds the section header using decoratedText instead of card header if the topic title is too long

 *

 * @param {string} topic - Topic of the poll

 * @param {string} author - Display name of user that created the poll

 * @returns {chatV1.Schema$GoogleAppsCardV1Section} card section

 */

function sectionHeader(topic: string, author: string): chatV1.Schema$GoogleAppsCardV1Section {

  return {

    widgets: [

      {

        'decoratedText': {

          'text': topic,

          'wrapText': true,

          'bottomLabel': `Posted by ${author}`,

          'startIcon': {

            'altText': 'Absolute Poll',

            'iconUrl': ICON_URL_48X48,

            'imageType': 'SQUARE',

          },

        },

      },

    ],

  };

}

/**

 * Builds the configuration form.

 *

 * @param {object} state - Current state of poll

 * @param {object} state.author - User that submitted the poll

 * @param {string} state.topic - Topic of poll

 * @param {string[]} state.choices - Text of choices to display to users

 * @param {object} state.votes - Map of cast votes keyed by choice index

 * @param {object} state.choiceCreator - Map of cast votes keyed by choice index

 * @param {boolean} state.anon - Is anonymous?(will save voter name or not)

 * @param {boolean} state.optionable - Can other user add other option?

 * @returns {chatV1.Schema$CardWithId} card

 */

export function buildVoteCard(state: PollState) {

  const sections = [];

  const stateString = JSON.stringify(state);

  const votes: Array<Array<Voter>> = Object.values(state.votes!);

  const totalVotes: number = votes.reduce((sum, vote) => sum + vote.length, 0);

  for (let i = 0; i < state.choices.length; ++i) {

    const creator = state.choiceCreator?.[i];

    const section = choiceSection(i, state, totalVotes, stateString, creator);

    sections.push(section);

  }

  if (state.optionable) {

    sections.push(

      {

        'widgets': [

          {

            'buttonList': {

              'buttons': [

                {

                  'text': 'Add Option',

                  'onClick': {

                    'action': {

                      'function': 'add_option_form',

                      'interaction': 'OPEN_DIALOG',

                      'parameters': [],

                    },

                  },

                },

              ],

            },

          },

        ],

      });

  }

  const card: chatV1.Schema$CardWithId = {

    'cardId': 'unique-card-id',

    'card': {

      sections,

    },

  };

  const authorName = state.author?.displayName ?? '';

  if (state.topic.length > 40) {

    const widgetHeader = sectionHeader(state.topic, authorName);

    card.card!.sections = [widgetHeader, ...sections];

  } else {

    card.card!.header = cardHeader(state.topic, authorName);

  }

  return card;

}