Initial commit 🍀

src/api/endpoints/following/delete.js

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+'use strict';
+
+/**
+ * Module dependencies
+ */
+import * as mongo from 'mongodb';
+import User from '../../models/user';
+import Following from '../../models/following';
+import event from '../../event';
+import serializeUser from '../../serializers/user';
+
+/**
+ * Unfollow a user
+ *
+ * @param {Object} params
+ * @param {Object} user
+ * @return {Promise<object>}
+ */
+module.exports = (params, user) =>
+	new Promise(async (res, rej) =>
+{
+	const follower = user;
+
+	// Get 'user_id' parameter
+	let userId = params.user_id;
+	if (userId === undefined || userId === null) {
+		return rej('user_id is required');
+	}
+
+	// Check if the followee is yourself
+	if (user._id.equals(userId)) {
+		return rej('followee is yourself');
+	}
+
+	// Get followee
+	const followee = await User.findOne({
+		_id: new mongo.ObjectID(userId)
+	});
+
+	if (followee === null) {
+		return rej('user not found');
+	}
+
+	// Check not following
+	const exist = await Following.findOne({
+		follower_id: follower._id,
+		followee_id: followee._id,
+		deleted_at: { $exists: false }
+	});
+
+	if (exist === null) {
+		return rej('already not following');
+	}
+
+	// Delete following
+	await Following.updateOne({
+		_id: exist._id
+	}, {
+		$set: {
+			deleted_at: new Date()
+		}
+	});
+
+	// Send response
+	res();
+
+	// Decrement following count
+	User.updateOne({ _id: follower._id }, {
+		$inc: {
+			following_count: -1
+		}
+	});
+
+	// Decrement followers count
+	User.updateOne({ _id: followee._id }, {
+		$inc: {
+			followers_count: -1
+		}
+	});
+
+	// Publish follow event
+	event(follower._id, 'unfollow', await serializeUser(followee, follower));
+});