Added a way to retrieve MR files

Signed-off-by: Jeroen van Baarsen <jeroenvanbaarsen@gmail.com>

2 files changed, 27 insertions, 5 deletions

diff --git a/lib/api/entities.rb b/lib/api/entities.rb
index ac166ed4fba..96920718ab5 100644
--- a/lib/api/entities.rb
+++ b/lib/api/entities.rb
@@ -147,6 +147,11 @@ module API
       expose :state, :created_at, :updated_at
     end
 
+    class RepoDiff < Grape::Entity
+      expose :old_path, :new_path, :a_mode, :b_mode, :diff
+      expose :new_file, :renamed_file, :deleted_file
+    end
+
     class Milestone < ProjectEntity
       expose :due_date
     end
@@ -166,6 +171,12 @@ module API
       expose :milestone, using: Entities::Milestone
     end
 
+    class MergeRequestChanges < MergeRequest
+      expose :diffs, as: :changes, using: Entities::RepoDiff do |compare, _|
+        compare.diffs
+      end
+    end
+
     class SSHKey < Grape::Entity
       expose :id, :title, :key, :created_at
     end
@@ -236,11 +247,6 @@ module API
       expose :name, :color
     end
 
-    class RepoDiff < Grape::Entity
-      expose :old_path, :new_path, :a_mode, :b_mode, :diff
-      expose :new_file, :renamed_file, :deleted_file
-    end
-
     class Compare < Grape::Entity
       expose :commit, using: Entities::RepoCommit do |compare, options|
         Commit.decorate(compare.commits).last
diff --git a/lib/api/merge_requests.rb b/lib/api/merge_requests.rb
index 2a5b10c6f52..a0ebd8d0c1b 100644
--- a/lib/api/merge_requests.rb
+++ b/lib/api/merge_requests.rb
@@ -75,6 +75,22 @@ module API
         present merge_request, with: Entities::MergeRequest
       end
 
+      # Show MR changes
+      #
+      # Parameters:
+      #   id (required)               - The ID of a project
+      #   merge_request_id (required) - The ID of MR
+      #
+      # Example:
+      #   GET /projects/:id/merge_request/:merge_request_id/changes
+      #
+      get ':id/merge_request/:merge_request_id/changes' do
+        merge_request = user_project.merge_requests.
+          find(params[:merge_request_id])
+        authorize! :read_merge_request, merge_request
+        present merge_request, with: Entities::MergeRequestChanges
+      end
+
       # Create MR
       #
       # Parameters: