wip

src/api/endpoints/posts/polls/vote.ts

@@ -0,0 +1,88 @@
+'use strict';
+
+/**
+ * Module dependencies
+ */
+import it from '../../../it';
+import Vote from '../../../models/poll-vote';
+import Post from '../../../models/post';
+import notify from '../../../common/notify';
+
+/**
+ * Vote poll of a post
+ *
+ * @param {any} params
+ * @param {any} user
+ * @return {Promise<any>}
+ */
+module.exports = (params, user) =>
+	new Promise(async (res, rej) => {
+		// Get 'post_id' parameter
+		const [postId, postIdErr] = it(params.post_id, 'id', true);
+		if (postIdErr) return rej('invalid post_id param');
+
+		// Get votee
+		const post = await Post.findOne({
+			_id: postId
+		});
+
+		if (post === null) {
+			return rej('post not found');
+		}
+
+		if (post.poll == null) {
+			return rej('poll not found');
+		}
+
+		// Get 'choice' parameter
+		const [choice, choiceError] =
+			it(params.choice).expect.string()
+				.required()
+				.validate(c => post.poll.choices.some(x => x.id == c))
+				.qed();
+		if (choiceError) return rej('invalid choice param');
+
+		// if already voted
+		const exist = await Vote.findOne({
+			post_id: post._id,
+			user_id: user._id
+		});
+
+		if (exist !== null) {
+			return rej('already voted');
+		}
+
+		// Create vote
+		await Vote.insert({
+			created_at: new Date(),
+			post_id: post._id,
+			user_id: user._id,
+			choice: choice
+		});
+
+		// Send response
+		res();
+
+		const inc = {};
+		inc[`poll.choices.${findWithAttr(post.poll.choices, 'id', choice)}.votes`] = 1;
+
+		// Increment likes count
+		Post.update({ _id: post._id }, {
+			$inc: inc
+		});
+
+		// Notify
+		notify(post.user_id, user._id, 'poll_vote', {
+			post_id: post._id,
+			choice: choice
+		});
+	});
+
+function findWithAttr(array, attr, value) {
+	for (let i = 0; i < array.length; i += 1) {
+		if (array[i][attr] === value) {
+			return i;
+		}
+	}
+	return -1;
+}