AP Undo Like (#3933)

* AP Undo Like

* rename

src/server/api/common/getters.ts

@@ -0,0 +1,18 @@
+import * as mongo from 'mongodb';
+import Note from "../../../models/note";
+
+/**
+ * Get valied note for API processing
+ */
+export async function getValiedNote(noteId: mongo.ObjectID) {
+	const note = await Note.findOne({
+		_id: noteId,
+		deletedAt: { $exists: false }
+	});
+
+	if (note === null) {
+		throw 'note not found';
+	}
+
+	return note;
+}