1 files changed, 63 insertions, 0 deletions
diff --git a/lib/gitlab/git/diff.rb b/lib/gitlab/git/diff.rb
new file mode 100644
index 00000000000..d9225857407
--- /dev/null
+++ b/lib/gitlab/git/diff.rb
@@ -0,0 +1,63 @@
+# Gitlab::Git::Diff is a wrapper around native Grit::Diff object
+# We dont want to use grit objects inside app/
+# It helps us easily migrate to rugged in future
+module Gitlab
+  module Git
+    class Diff
+      BROKEN_DIFF = "--broken-diff"
+
+      attr_accessor :raw_diff
+
+      # Diff properties
+      attr_accessor :old_path, :new_path, :a_mode, :b_mode, :diff
+
+      # Stats properties
+      attr_accessor  :new_file, :renamed_file, :deleted_file
+
+      def initialize(raw_diff, head = nil)
+        raise "Nil as raw diff passed" unless raw_diff
+
+        if raw_diff.is_a?(Hash)
+          init_from_hash(raw_diff)
+        else
+          init_from_grit(raw_diff)
+        end
+
+        @head = head
+      end
+
+      def serialize_keys
+        %w(diff new_path old_path a_mode b_mode new_file renamed_file deleted_file)
+      end
+
+      def to_hash
+        hash = {}
+
+        keys = serialize_keys
+
+        keys.each do |key|
+          hash[key] = send(key)
+        end
+
+        hash
+      end
+
+      private
+
+      def init_from_grit(grit)
+        @raw_diff = grit
+
+        serialize_keys.each do |key|
+          send(:"#{key}=", grit.send(key))
+        end
+      end
+
+      def init_from_hash(hash)
+        serialize_keys.each do |key|
+          send(:"#{key}=", hash[key])
+        end
+      end
+    end
+  end
+end
+