add rate limit

lib/rate_limit.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+module RateLimit
+  LimitApproached = Class.new(StandardError)
+
+  STORE = ActiveSupport::Cache::MemoryStore.new
+
+  module_function
+
+  def call(key, limit:, ttl:, enabled: Docuseal.multitenant?)
+    return true unless enabled
+
+    value = STORE.increment(key, 1, expires_in: ttl)
+
+    raise LimitApproached if value > limit
+
+    true
+  end
+end