refactoring

Resolve #7779

packages/backend/src/server/api/endpoints/gallery/posts/unlike.ts

@@ -0,0 +1,54 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../../define';
+import { ApiError } from '../../../error';
+import { GalleryPosts, GalleryLikes } from '@/models/index';
+
+export const meta = {
+	tags: ['gallery'],
+
+	requireCredential: true as const,
+
+	kind: 'write:gallery-likes',
+
+	params: {
+		postId: {
+			validator: $.type(ID),
+		}
+	},
+
+	errors: {
+		noSuchPost: {
+			message: 'No such post.',
+			code: 'NO_SUCH_POST',
+			id: 'c32e6dd0-b555-4413-925e-b3757d19ed84'
+		},
+
+		notLiked: {
+			message: 'You have not liked that post.',
+			code: 'NOT_LIKED',
+			id: 'e3e8e06e-be37-41f7-a5b4-87a8250288f0'
+		},
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const post = await GalleryPosts.findOne(ps.postId);
+	if (post == null) {
+		throw new ApiError(meta.errors.noSuchPost);
+	}
+
+	const exist = await GalleryLikes.findOne({
+		postId: post.id,
+		userId: user.id
+	});
+
+	if (exist == null) {
+		throw new ApiError(meta.errors.notLiked);
+	}
+
+	// Delete like
+	await GalleryLikes.delete(exist.id);
+
+	GalleryPosts.decrement({ id: post.id }, 'likedCount', 1);
+});