1 files changed, 138 insertions, 0 deletions
diff --git a/lib/api/v3/files.rb b/lib/api/v3/files.rb
new file mode 100644
index 00000000000..13542b0c71c
--- /dev/null
+++ b/lib/api/v3/files.rb
@@ -0,0 +1,138 @@
+module API
+  module V3
+    class Files < Grape::API
+      helpers do
+        def commit_params(attrs)
+          {
+            file_path: attrs[:file_path],
+            start_branch: attrs[:branch],
+            target_branch: attrs[:branch],
+            commit_message: attrs[:commit_message],
+            file_content: attrs[:content],
+            file_content_encoding: attrs[:encoding],
+            author_email: attrs[:author_email],
+            author_name: attrs[:author_name]
+          }
+        end
+
+        def commit_response(attrs)
+          {
+            file_path: attrs[:file_path],
+            branch: attrs[:branch]
+          }
+        end
+
+        params :simple_file_params do
+          requires :file_path, type: String, desc: 'The path to new file. Ex. lib/class.rb'
+          requires :branch_name, type: String, desc: 'The name of branch'
+          requires :commit_message, type: String, desc: 'Commit Message'
+          optional :author_email, type: String, desc: 'The email of the author'
+          optional :author_name, type: String, desc: 'The name of the author'
+        end
+
+        params :extended_file_params do
+          use :simple_file_params
+          requires :content, type: String, desc: 'File content'
+          optional :encoding, type: String, values: %w[base64], desc: 'File encoding'
+        end
+      end
+
+      params do
+        requires :id, type: String, desc: 'The project ID'
+      end
+      resource :projects, requirements: { id: %r{[^/]+} } do
+        desc 'Get a file from repository'
+        params do
+          requires :file_path, type: String, desc: 'The path to the file. Ex. lib/class.rb'
+          requires :ref, type: String, desc: 'The name of branch, tag, or commit'
+        end
+        get ":id/repository/files" do
+          authorize! :download_code, user_project
+
+          commit = user_project.commit(params[:ref])
+          not_found!('Commit') unless commit
+
+          repo = user_project.repository
+          blob = repo.blob_at(commit.sha, params[:file_path])
+          not_found!('File') unless blob
+
+          blob.load_all_data!(repo)
+          status(200)
+
+          {
+            file_name: blob.name,
+            file_path: blob.path,
+            size: blob.size,
+            encoding: "base64",
+            content: Base64.strict_encode64(blob.data),
+            ref: params[:ref],
+            blob_id: blob.id,
+            commit_id: commit.id,
+            last_commit_id: repo.last_commit_id_for_path(commit.sha, params[:file_path])
+          }
+        end
+
+        desc 'Create new file in repository'
+        params do
+          use :extended_file_params
+        end
+        post ":id/repository/files" do
+          authorize! :push_code, user_project
+
+          file_params = declared_params(include_missing: false)
+          file_params[:branch] = file_params.delete(:branch_name)
+
+          result = ::Files::CreateService.new(user_project, current_user, commit_params(file_params)).execute
+
+          if result[:status] == :success
+            status(201)
+            commit_response(file_params)
+          else
+            render_api_error!(result[:message], 400)
+          end
+        end
+
+        desc 'Update existing file in repository'
+        params do
+          use :extended_file_params
+        end
+        put ":id/repository/files" do
+          authorize! :push_code, user_project
+
+          file_params = declared_params(include_missing: false)
+          file_params[:branch] = file_params.delete(:branch_name)
+
+          result = ::Files::UpdateService.new(user_project, current_user, commit_params(file_params)).execute
+
+          if result[:status] == :success
+            status(200)
+            commit_response(file_params)
+          else
+            http_status = result[:http_status] || 400
+            render_api_error!(result[:message], http_status)
+          end
+        end
+
+        desc 'Delete an existing file in repository'
+        params do
+          use :simple_file_params
+        end
+        delete ":id/repository/files" do
+          authorize! :push_code, user_project
+
+          file_params = declared_params(include_missing: false)
+          file_params[:branch] = file_params.delete(:branch_name)
+
+          result = ::Files::DestroyService.new(user_project, current_user, commit_params(file_params)).execute
+
+          if result[:status] == :success
+            status(200)
+            commit_response(file_params)
+          else
+            render_api_error!(result[:message], 400)
+          end
+        end
+      end
+    end
+  end
+end