refactoring

Resolve #7779

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

@@ -0,0 +1,71 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../../define';
+import { ApiError } from '../../../error';
+import { GalleryPosts, GalleryLikes } from '@/models/index';
+import { genId } from '@/misc/gen-id';
+
+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: '56c06af3-1287-442f-9701-c93f7c4a62ff'
+		},
+
+		yourPost: {
+			message: 'You cannot like your post.',
+			code: 'YOUR_POST',
+			id: 'f78f1511-5ebc-4478-a888-1198d752da68'
+		},
+
+		alreadyLiked: {
+			message: 'The post has already been liked.',
+			code: 'ALREADY_LIKED',
+			id: '40e9ed56-a59c-473a-bf3f-f289c54fb5a7'
+		},
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const post = await GalleryPosts.findOne(ps.postId);
+	if (post == null) {
+		throw new ApiError(meta.errors.noSuchPost);
+	}
+
+	if (post.userId === user.id) {
+		throw new ApiError(meta.errors.yourPost);
+	}
+
+	// if already liked
+	const exist = await GalleryLikes.findOne({
+		postId: post.id,
+		userId: user.id
+	});
+
+	if (exist != null) {
+		throw new ApiError(meta.errors.alreadyLiked);
+	}
+
+	// Create like
+	await GalleryLikes.insert({
+		id: genId(),
+		createdAt: new Date(),
+		postId: post.id,
+		userId: user.id
+	});
+
+	GalleryPosts.increment({ id: post.id }, 'likedCount', 1);
+});