refactoring

Resolve #7779

packages/backend/src/server/api/endpoints/pages/unlike.ts

@@ -0,0 +1,54 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../define';
+import { ApiError } from '../../error';
+import { Pages, PageLikes } from '@/models/index';
+
+export const meta = {
+	tags: ['pages'],
+
+	requireCredential: true as const,
+
+	kind: 'write:page-likes',
+
+	params: {
+		pageId: {
+			validator: $.type(ID),
+		}
+	},
+
+	errors: {
+		noSuchPage: {
+			message: 'No such page.',
+			code: 'NO_SUCH_PAGE',
+			id: 'a0d41e20-1993-40bd-890e-f6e560ae648e'
+		},
+
+		notLiked: {
+			message: 'You have not liked that page.',
+			code: 'NOT_LIKED',
+			id: 'f5e586b0-ce93-4050-b0e3-7f31af5259ee'
+		},
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const page = await Pages.findOne(ps.pageId);
+	if (page == null) {
+		throw new ApiError(meta.errors.noSuchPage);
+	}
+
+	const exist = await PageLikes.findOne({
+		pageId: page.id,
+		userId: user.id
+	});
+
+	if (exist == null) {
+		throw new ApiError(meta.errors.notLiked);
+	}
+
+	// Delete like
+	await PageLikes.delete(exist.id);
+
+	Pages.decrement({ id: page.id }, 'likedCount', 1);
+});