Introduce processor

src/server/api/endpoints/channels/unwatch.ts

@@ -0,0 +1,60 @@
+/**
+ * Module dependencies
+ */
+import $ from 'cafy';
+import Channel from '../../models/channel';
+import Watching from '../../models/channel-watching';
+
+/**
+ * Unwatch a channel
+ *
+ * @param {any} params
+ * @param {any} user
+ * @return {Promise<any>}
+ */
+module.exports = (params, user) => new Promise(async (res, rej) => {
+	// Get 'channel_id' parameter
+	const [channelId, channelIdErr] = $(params.channel_id).id().$;
+	if (channelIdErr) return rej('invalid channel_id param');
+
+	//#region Fetch channel
+	const channel = await Channel.findOne({
+		_id: channelId
+	});
+
+	if (channel === null) {
+		return rej('channel not found');
+	}
+	//#endregion
+
+	//#region Check whether not watching
+	const exist = await Watching.findOne({
+		user_id: user._id,
+		channel_id: channel._id,
+		deleted_at: { $exists: false }
+	});
+
+	if (exist === null) {
+		return rej('already not watching');
+	}
+	//#endregion
+
+	// Delete watching
+	await Watching.update({
+		_id: exist._id
+	}, {
+		$set: {
+			deleted_at: new Date()
+		}
+	});
+
+	// Send response
+	res();
+
+	// Decrement watching count
+	Channel.update(channel._id, {
+		$inc: {
+			watching_count: -1
+		}
+	});
+});