1 files changed, 24 insertions, 0 deletions
diff --git a/logic/cartridge/fetch.rb b/logic/cartridge/fetch.rb
new file mode 100644
index 0000000..2335358
--- /dev/null
+++ b/logic/cartridge/fetch.rb
@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+require_relative 'default'
+require_relative '../helpers/hash'
+
+module NanoBot
+  module Logic
+    module Cartridge
+      module Fetch
+        def self.cascate(cartridge, paths)
+          results = paths.map { |path| Helpers::Hash.fetch(cartridge, path) }
+          result = results.find { |candidate| !candidate.nil? }
+          return result unless result.nil?
+
+          results = paths.map { |path| Helpers::Hash.fetch(Default.instance.values, path) }
+          result = results.find { |candidate| !candidate.nil? }
+          return result unless result.nil?
+
+          nil
+        end
+      end
+    end
+  end
+end