1 files changed, 33 insertions, 0 deletions
diff --git a/logic/cartridge/affixes.rb b/logic/cartridge/affixes.rb
new file mode 100644
index 0000000..0b40fa2
--- /dev/null
+++ b/logic/cartridge/affixes.rb
@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+require_relative '../helpers/hash'
+require_relative './default'
+
+module NanoBot
+  module Logic
+    module Cartridge
+      module Affixes
+        def self.get(cartridge, interface, direction, kind)
+          affix = [
+            {
+              exists: (Helpers::Hash.fetch(cartridge, [:interfaces, direction]) || {}).key?(kind),
+              value: Helpers::Hash.fetch(cartridge, [:interfaces, direction, kind])
+            },
+            {
+              exists: (Helpers::Hash.fetch(cartridge, [:interfaces, interface, direction]) || {}).key?(kind),
+              value: Helpers::Hash.fetch(cartridge, [:interfaces, interface, direction, kind])
+            }
+          ].filter { |candidate| candidate[:exists] }.last
+
+          if affix.nil?
+            return Helpers::Hash.fetch(
+              Default.instance.values, [:interfaces, interface, direction, kind]
+            )
+          end
+
+          affix[:value]
+        end
+      end
+    end
+  end
+end