[API] お気に入り状態は投稿情報に含めないように統一

src/server/api/endpoints/notes/state.ts

@@ -0,0 +1,38 @@
+import $ from 'cafy'; import ID, { transform } from '../../../../misc/cafy-id';
+import define from '../../define';
+import Favorite from '../../../../models/favorite';
+
+export const meta = {
+	stability: 'stable',
+
+	desc: {
+		'ja-JP': '指定した投稿の状態を取得します。',
+		'en-US': 'Get state of a note.'
+	},
+
+	requireCredential: true,
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+			transform: transform,
+			desc: {
+				'ja-JP': '対象の投稿のID',
+				'en-US': 'Target note ID.'
+			}
+		}
+	}
+};
+
+export default define(meta, (ps, user) => new Promise(async (res, rej) => {
+	const favorite = await Favorite.count({
+		userId: user._id,
+		noteId: ps.noteId
+	}, {
+		limit: 1
+	});
+
+	res({
+		isFavorited: favorite !== 0
+	});
+}));