Implement the poll feature

Closes #164

1 files changed, 101 insertions, 0 deletions

diff --git a/src/api/endpoints/posts/polls/vote.js b/src/api/endpoints/posts/polls/vote.js
new file mode 100644
index 0000000000..f1842069d4
--- /dev/null
+++ b/src/api/endpoints/posts/polls/vote.js
@@ -0,0 +1,101 @@
+'use strict';
+
+/**
+ * Module dependencies
+ */
+import * as mongo from 'mongodb';
+import Vote from '../../../models/poll-vote';
+import Post from '../../../models/post';
+import notify from '../../../common/notify';
+
+/**
+ * Vote poll of a post
+ *
+ * @param {Object} params
+ * @param {Object} user
+ * @return {Promise<object>}
+ */
+module.exports = (params, user) =>
+	new Promise(async (res, rej) =>
+{
+	// Get 'post_id' parameter
+	const postId = params.post_id;
+	if (postId === undefined || postId === null) {
+		return rej('post_id is required');
+	}
+
+	// Validate id
+	if (!mongo.ObjectID.isValid(postId)) {
+		return rej('incorrect post_id');
+	}
+
+	// Get votee
+	const post = await Post.findOne({
+		_id: new mongo.ObjectID(postId)
+	});
+
+	if (post === null) {
+		return rej('post not found');
+	}
+
+	if (post.poll == null) {
+		return rej('poll not found');
+	}
+
+	// Get 'choice' parameter
+	const choice = params.choice;
+	if (choice == null) {
+		return rej('choice is required');
+	}
+
+	// Validate choice
+	if (!post.poll.choices.some(x => x.id == choice)) {
+		return rej('invalid choice');
+	}
+
+	// Check arleady 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;
+
+	console.log(inc);
+
+	// 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;
+}