1 files changed, 43 insertions, 0 deletions
diff --git a/hooks/convertPoll.ts b/hooks/convertPoll.ts
new file mode 100644
index 0000000..1c32851
--- /dev/null
+++ b/hooks/convertPoll.ts
@@ -0,0 +1,43 @@
+import { HookContext } from '@feathersjs/feathers';
+import { Types } from 'mongoose';
+import bluebird from 'bluebird';
+import _ from 'lodash';
+import { Poll, User, Vote } from 'which-types';
+
+import { PollSchema } from '../models/polls/poll.schema';
+import VoteModel from '../models/votes/vote.model';
+
+
+export default async (context: HookContext): Promise<HookContext> => {
+  const { app, result, params: { user } } = context;
+
+  const convert = async (poll: PollSchema): Promise<Poll | null> => {
+    const author = await app.service('users').get(poll.authorId);
+
+    const contents = await VoteModel.aggregate([
+      { $match: { pollId: Types.ObjectId(poll._id) } },
+      { $group: { _id: '$which', total: { $sum: 1 } } }
+    ]).then(groups => groups.reduce(
+      (acc, group) =>  _.set(acc, group._id + '.votes', group.total),
+      { left: { votes: 0 }, right: { votes: 0 } }
+    ));
+
+    const userChoice = await VoteModel.findOne(
+      { pollId: poll._id, userId: user?._id }
+    ).then(vote => vote?.which);
+
+    return _.merge(
+      _.omit(poll, ['authorId']),
+      { author, contents, userChoice }
+    );
+  };
+
+  if (Array.isArray(result)) {
+    const polls = await bluebird.map(result, (poll: PollSchema) => convert(poll));
+    context.result = _.compact(polls);
+  } else {
+    context.result = await convert(result);
+  }
+  return context;
+};
+