Implement like

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

@@ -3,20 +3,11 @@
  */
 import $ from 'cafy';
 import Reaction from '../../../../../models/post-reaction';
-import Post, { pack as packPost } from '../../../../../models/post';
-import { pack as packUser } from '../../../../../models/user';
-import Watching from '../../../../../models/post-watching';
-import watch from '../../../../../post/watch';
-import { publishPostStream } from '../../../../../publishers/stream';
-import notify from '../../../../../publishers/notify';
-import pushSw from '../../../../../publishers/push-sw';
+import Post from '../../../../../models/post';
+import create from '../../../../../services/post/reaction/create';
 
 /**
  * React to a post
- *
- * @param {any} params
- * @param {any} user
- * @return {Promise<any>}
  */
 module.exports = (params, user) => new Promise(async (res, rej) => {
 	// Get 'postId' parameter
@@ -46,78 +37,11 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 		return rej('post not found');
 	}
 
-	// Myself
-	if (post.userId.equals(user._id)) {
-		return rej('cannot react to my post');
+	try {
+		await create(user, post, reaction);
+	} catch (e) {
+		rej(e);
 	}
 
-	// if already reacted
-	const exist = await Reaction.findOne({
-		postId: post._id,
-		userId: user._id,
-		deletedAt: { $exists: false }
-	});
-
-	if (exist !== null) {
-		return rej('already reacted');
-	}
-
-	// Create reaction
-	await Reaction.insert({
-		createdAt: new Date(),
-		postId: post._id,
-		userId: user._id,
-		reaction: reaction
-	});
-
-	// Send response
 	res();
-
-	const inc = {};
-	inc[`reactionCounts.${reaction}`] = 1;
-
-	// Increment reactions count
-	await Post.update({ _id: post._id }, {
-		$inc: inc
-	});
-
-	publishPostStream(post._id, 'reacted');
-
-	// Notify
-	notify(post.userId, user._id, 'reaction', {
-		postId: post._id,
-		reaction: reaction
-	});
-
-	pushSw(post.userId, 'reaction', {
-		user: await packUser(user, post.userId),
-		post: await packPost(post, post.userId),
-		reaction: reaction
-	});
-
-	// Fetch watchers
-	Watching
-		.find({
-			postId: post._id,
-			userId: { $ne: user._id },
-			// 削除されたドキュメントは除く
-			deletedAt: { $exists: false }
-		}, {
-			fields: {
-				userId: true
-			}
-		})
-		.then(watchers => {
-			watchers.forEach(watcher => {
-				notify(watcher.userId, user._id, 'reaction', {
-					postId: post._id,
-					reaction: reaction
-				});
-			});
-		});
-
-	// この投稿をWatchする
-	if (user.account.settings.autoWatch !== false) {
-		watch(user._id, post);
-	}
 });