add encryptable_concern

Co-authored-by: François VANTOMME <akarzim@gmail.com>

app/models/concerns/encryptable_concern.rb

@@ -0,0 +1,21 @@
+module EncryptableConcern
+  extend ActiveSupport::Concern
+
+  class_methods do
+    def attr_encrypted(*attributes)
+      attributes.each do |attribute|
+        define_method("#{attribute}=".to_sym) do |value|
+          self.public_send(
+            "encrypted_#{attribute}=".to_sym,
+            EncryptionService.new.encrypt(value)
+          )
+        end
+
+        define_method(attribute) do
+          value = self.public_send("encrypted_#{attribute}".to_sym)
+          EncryptionService.new.decrypt(value) if value.present?
+        end
+      end
+    end
+  end
+end