From f441436e53377f207657ac0e0e518e5ee2b33a6c Mon Sep 17 00:00:00 2001
From: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Date: Mon, 26 May 2014 16:08:22 +0300
Subject: [PATCH] Add compare branches endpoint to API

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
---
 doc/api/repositories.md | 66 +++++++++++++++++++++++++++++++++++++++++
 lib/api/entities.rb     | 17 +++++++++++
 lib/api/repositories.rb | 16 ++++++++++
 3 files changed, 99 insertions(+)

diff --git a/doc/api/repositories.md b/doc/api/repositories.md
index 858fad0a0b5..2cd387275e9 100644
--- a/doc/api/repositories.md
+++ b/doc/api/repositories.md
@@ -131,3 +131,69 @@ GET /projects/:id/repository/archive
 Parameters:
 + `id` (required) - The ID of a project
 + `sha` (optional) - The commit sha to download defaults to the tip of the default branch
+
+
+## Compare branches, tags or commits
+
+```
+GET /projects/:id/repository/compare
+```
+
+Parameters:
++ `id` (required) - The ID of a project
++ `from` (required) - the commit sha or branch name
++ `to` (required) - the commit sha or branch name
+
+
+```
+GET /projects/:id/repository/compare?from=master&to=feature
+```
+
+Response: 
+
+```json
+{
+  "commit": {
+    "id": "72e10ef47e770a95439255b2c49de722e8782106",
+    "short_id": "72e10ef47e7",
+    "title": "Add NEWFILE",
+    "author_name": "Dmitriy Zaporozhets",
+    "author_email": "dmitriy.zaporozhets@gmail.com",
+    "created_at": "2014-05-26T16:03:54+03:00"
+  },
+  "commits": [{
+    "id": "0b4bc9a49b562e85de7cc9e834518ea6828729b9",
+    "short_id": "0b4bc9a49b5",
+    "title": "Feature added",
+    "author_name": "Dmitriy Zaporozhets",
+    "author_email": "dmitriy.zaporozhets@gmail.com",
+    "created_at": "2014-02-27T10:26:01+02:00"
+  }, {
+    "id": "72e10ef47e770a95439255b2c49de722e8782106",
+    "short_id": "72e10ef47e7",
+    "title": "Add NEWFILE",
+    "author_name": "Dmitriy Zaporozhets",
+    "author_email": "dmitriy.zaporozhets@gmail.com",
+    "created_at": "2014-05-26T16:03:54+03:00"
+  }],
+  "diffs": [{
+    "old_path": "NEWFILE",
+    "new_path": "NEWFILE",
+    "a_mode": null,
+    "b_mode": null,
+    "diff": "--- /dev/null\n+++ b/NEWFILE\n@@ -0,0 +1 @@\n+This is NEWFILE content\n\\ No newline at end of file",
+    "new_file": true,
+    "renamed_file": false,
+    "deleted_file": false
+  }, {
+    "old_path": "files/ruby/feature.rb",
+    "new_path": "files/ruby/feature.rb",
+    "a_mode": null,
+    "b_mode": null,
+    "diff": "--- /dev/null\n+++ b/files/ruby/feature.rb\n@@ -0,0 +1,5 @@\n+class Feature\n+  def foo\n+    puts 'bar'\n+  end\n+end",
+    "new_file": true,
+    "renamed_file": false,
+    "deleted_file": false
+  }]
+}
+```
diff --git a/lib/api/entities.rb b/lib/api/entities.rb
index 457af52fe9d..eead8b18ebd 100644
--- a/lib/api/entities.rb
+++ b/lib/api/entities.rb
@@ -194,5 +194,22 @@ module API
     class Label < Grape::Entity
       expose :name
     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.new compare.commit
+      end
+      expose :commits, using: Entities::RepoCommit do |compare, options|
+        Commit.decorate compare.commits
+      end
+      expose :diffs, using: Entities::RepoDiff do |compare, options|
+        compare.diffs
+      end
+    end
   end
 end
diff --git a/lib/api/repositories.rb b/lib/api/repositories.rb
index 076a9ceeb74..d59c25cf316 100644
--- a/lib/api/repositories.rb
+++ b/lib/api/repositories.rb
@@ -15,6 +15,7 @@ module API
           not_found!
         end
       end
+
       # Get a project repository tags
       #
       # Parameters:
@@ -118,6 +119,21 @@ module API
           not_found!
         end
       end
+
+      # Compare two branches, tags or commits
+      #
+      # Parameters:
+      #   id (required) - The ID of a project
+      #   from (required) - the commit sha or branch name
+      #   to (required) - the commit sha or branch name
+      # Example Request:
+      #   GET /projects/:id/repository/compare?from=master&to=feature
+      get ':id/repository/compare' do
+        authorize! :download_code, user_project
+        compare = Gitlab::Git::Compare.new(user_project.repository.raw_repository, params[:from], params[:to], MergeRequestDiff::COMMITS_SAFE_SIZE)
+
+        present compare, with: Entities::Compare
+      end
     end
   end
 end
-- 
GitLab