media-information.js

import Component from '@ember/component';
import { get, computed } from '@ember/object';
import { equal, not } from '@ember/object/computed';
import humanizeDuration from 'client/utils/humanize-duration';
import moment from 'moment';

const computedProduction = key => (
  computed('media.animeProductions', function() {
    const productions = get(this, 'media.animeProductions');
    return productions.filterBy('role', key).mapBy('producer.name').join(', ');
  }).readOnly()
);

export default Component.extend({
  classNames: ['media--information'],
  isExpanded: false,
  producers: computedProduction('producer'),
  licensors: computedProduction('licensor'),
  studios: computedProduction('studio'),

  isAnime: equal('media.modelType', 'anime'),
  isManga: not('isAnime'),

  season: computed('media.startDate', function() {
    const start = get(this, 'media.startDate');
    if (!start) { return null; }
    const month = start.month() + 1;
    if ([12, 1, 2].includes(month)) {
      return 'winter';
    } else if ([3, 4, 5].includes(month)) {
      return 'spring';
    } else if ([6, 7, 8].includes(month)) {
      return 'summer';
    } else if ([9, 10, 11].includes(month)) {
      return 'fall';
    }
  }).readOnly(),

  seasonYear: computed('season', function() {
    const season = get(this, 'season');
    if (!season) { return null; }
    const start = get(this, 'media.startDate');
    const year = start.year();
    const month = start.month() + 1;
    if (season === 'winter' && month === 12) {
      return year + 1;
    }
    return year;
  }).readOnly(),

  airedLongerThanOneDay: computed('media.{startDate,endDate}', function() {
    const start = get(this, 'media.startDate');
    if (!start) { return false; }
    return !start.isSame(get(this, 'media.endDate'));
  }).readOnly(),

  totalTime: computed('media.{episodeCount,episodeLength}', function() {
    const count = get(this, 'media.episodeCount');
    const length = get(this, 'media.episodeLength');
    const time = moment.duration(count * length, 'minutes');
    return humanizeDuration(time);
  }).readOnly()
});