update

lib/favorites-cap.js

@@ -0,0 +1,15 @@
+'use strict';
+
+const DEFAULT_MAX = 1000;
+
+/**
+ * Returns { ok: true } if current row count < max, else { ok: false, message }.
+ * Pure: takes a db-like object so tests can mock.
+ */
+function checkAgainstCap(db, max = DEFAULT_MAX) {
+  const n = db.prepare('SELECT COUNT(*) AS n FROM favorites').get().n;
+  if (n < max) return { ok: true };
+  return { ok: false, message: `已达收藏上限 ${max} 条` };
+}
+
+module.exports = { checkAgainstCap, DEFAULT_MAX };