Introduce processor

src/server/api/endpoints/posts/reactions/delete.ts

@@ -0,0 +1,60 @@
+/**
+ * Module dependencies
+ */
+import $ from 'cafy';
+import Reaction from '../../../models/post-reaction';
+import Post from '../../../models/post';
+// import event from '../../../event';
+
+/**
+ * Unreact to 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] = $(params.post_id).id().$;
+	if (postIdErr) return rej('invalid post_id param');
+
+	// Fetch unreactee
+	const post = await Post.findOne({
+		_id: postId
+	});
+
+	if (post === null) {
+		return rej('post not found');
+	}
+
+	// if already unreacted
+	const exist = await Reaction.findOne({
+		post_id: post._id,
+		user_id: user._id,
+		deleted_at: { $exists: false }
+	});
+
+	if (exist === null) {
+		return rej('never reacted');
+	}
+
+	// Delete reaction
+	await Reaction.update({
+		_id: exist._id
+	}, {
+			$set: {
+				deleted_at: new Date()
+			}
+		});
+
+	// Send response
+	res();
+
+	const dec = {};
+	dec[`reaction_counts.${exist.reaction}`] = -1;
+
+	// Decrement reactions count
+	Post.update({ _id: post._id }, {
+		$inc: dec
+	});
+});