Introduce processor

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

@@ -0,0 +1,122 @@
+/**
+ * Module dependencies
+ */
+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 notify from '../../../common/notify';
+import watch from '../../../common/watch-post';
+import { publishPostStream, pushSw } from '../../../event';
+
+/**
+ * React 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');
+
+	// Get 'reaction' parameter
+	const [reaction, reactionErr] = $(params.reaction).string().or([
+		'like',
+		'love',
+		'laugh',
+		'hmm',
+		'surprise',
+		'congrats',
+		'angry',
+		'confused',
+		'pudding'
+	]).$;
+	if (reactionErr) return rej('invalid reaction param');
+
+	// Fetch reactee
+	const post = await Post.findOne({
+		_id: postId
+	});
+
+	if (post === null) {
+		return rej('post not found');
+	}
+
+	// Myself
+	if (post.user_id.equals(user._id)) {
+		return rej('cannot react to my post');
+	}
+
+	// if already reacted
+	const exist = await Reaction.findOne({
+		post_id: post._id,
+		user_id: user._id,
+		deleted_at: { $exists: false }
+	});
+
+	if (exist !== null) {
+		return rej('already reacted');
+	}
+
+	// Create reaction
+	await Reaction.insert({
+		created_at: new Date(),
+		post_id: post._id,
+		user_id: user._id,
+		reaction: reaction
+	});
+
+	// Send response
+	res();
+
+	const inc = {};
+	inc[`reaction_counts.${reaction}`] = 1;
+
+	// Increment reactions count
+	await Post.update({ _id: post._id }, {
+		$inc: inc
+	});
+
+	publishPostStream(post._id, 'reacted');
+
+	// Notify
+	notify(post.user_id, user._id, 'reaction', {
+		post_id: post._id,
+		reaction: reaction
+	});
+
+	pushSw(post.user_id, 'reaction', {
+		user: await packUser(user, post.user_id),
+		post: await packPost(post, post.user_id),
+		reaction: reaction
+	});
+
+	// Fetch watchers
+	Watching
+		.find({
+			post_id: post._id,
+			user_id: { $ne: user._id },
+			// 削除されたドキュメントは除く
+			deleted_at: { $exists: false }
+		}, {
+			fields: {
+				user_id: true
+			}
+		})
+		.then(watchers => {
+			watchers.forEach(watcher => {
+				notify(watcher.user_id, user._id, 'reaction', {
+					post_id: post._id,
+					reaction: reaction
+				});
+			});
+		});
+
+	// この投稿をWatchする
+	if (user.account.settings.auto_watch !== false) {
+		watch(user._id, post);
+	}
+});