refactoring

Resolve #7779

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

@@ -0,0 +1,69 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../define';
+import { NoteFavorites, Notes, NoteThreadMutings, NoteWatchings } from '@/models/index';
+
+export const meta = {
+	tags: ['notes'],
+
+	requireCredential: true as const,
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+		}
+	},
+
+	res: {
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
+		properties: {
+			isFavorited: {
+				type: 'boolean' as const,
+				optional: false as const, nullable: false as const
+			},
+			isWatching: {
+				type: 'boolean' as const,
+				optional: false as const, nullable: false as const
+			},
+			isMutedThread: {
+				type: 'boolean' as const,
+				optional: false as const, nullable: false as const
+			},
+		}
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const note = await Notes.findOneOrFail(ps.noteId);
+
+	const [favorite, watching, threadMuting] = await Promise.all([
+		NoteFavorites.count({
+			where: {
+				userId: user.id,
+				noteId: note.id,
+			},
+			take: 1
+		}),
+		NoteWatchings.count({
+			where: {
+				userId: user.id,
+				noteId: note.id,
+			},
+			take: 1
+		}),
+		NoteThreadMutings.count({
+			where: {
+				userId: user.id,
+				threadId: note.threadId || note.id,
+			},
+			take: 1
+		}),
+	]);
+
+	return {
+		isFavorited: favorite !== 0,
+		isWatching: watching !== 0,
+		isMutedThread: threadMuting !== 0,
+	};
+});