const urlJoin = require('url-join');
const { PodCollectionsHandlerMixin, PodResourcesHandlerMixin } = require('@activitypods/app');
const CONFIG = require('../config/config');
const { neverThrowingMatcher, verifiedEmit } = require('./emitted-activity');
const { guardedCreateAndAttach } = require('./collection-attach');

// Attaches an `apods:contacts` collection (and a WAC group of the same members) to the `as:Profile`
// a user creates, as the platform's collection handler does — with two differences that keep the
// webhook a hint (see emitted-activity.js):
//   - the handler runs only for a Create `verifiedEmit` accepts: re-read from the pod as the app,
//     attributed to the owner of the outbox the webhook fired on, its object an `as:Profile` of that
//     owner's pod, re-read too. The mixin's handler would act on the object embedded in the
//     (unauthenticated) webhook body, attributed to the activity's self-declared `actor`;
//   - `createAndAttach` creates no WAC group when nothing was attached (collection-attach.js).
module.exports = {
  name: 'contacts',
  mixins: [PodCollectionsHandlerMixin],
  settings: {
    shapeTreeUri: urlJoin(CONFIG.SHAPE_REPOSITORY_URL, 'shapetrees/as/Profile'),
    attachPredicate: 'http://activitypods.org/ns/core#contacts',
    collectionOptions: {
      ordered: false,
      summary: 'Festipod contacts'
    },
    createWacGroup: true
  },
  // Replaces the mixin's whole map (moleculer does not merge a custom schema key). The mixin's
  // update and delete handlers are left out on purpose: they never matched here (they require an
  // `onUpdate` this service does not have).
  activities: {
    create: {
      match: neverThrowingMatcher(PodResourcesHandlerMixin.activities.create.match),
      onEmit: verifiedEmit(
        'Create',
        async function (ctx, { object }, actorUri) {
          await this.onCreate(ctx, object, actorUri);
        },
        { objectType: 'Profile' }
      )
    }
  },
  actions: {
    createAndAttach: guardedCreateAndAttach
  }
};