From 0777e4b3dd3bf86b83fd1e6c0ca937cd7d290e1c Mon Sep 17 00:00:00 2001
From: Douglas Barbosa Alexandre <dbalexandre@gmail.com>
Date: Mon, 12 Sep 2016 22:49:05 -0300
Subject: Add service to update labels for a group/project

---
 app/controllers/groups/labels_controller.rb   |  4 ++-
 app/controllers/projects/labels_controller.rb |  4 ++-
 app/services/labels/update_service.rb         | 24 +++++++++++++
 spec/services/labels/update_service_spec.rb   | 51 +++++++++++++++++++++++++++
 4 files changed, 81 insertions(+), 2 deletions(-)
 create mode 100644 app/services/labels/update_service.rb
 create mode 100644 spec/services/labels/update_service_spec.rb

diff --git a/app/controllers/groups/labels_controller.rb b/app/controllers/groups/labels_controller.rb
index 1f67e3e198a..b8fc43eba25 100644
--- a/app/controllers/groups/labels_controller.rb
+++ b/app/controllers/groups/labels_controller.rb
@@ -28,7 +28,9 @@ class Groups::LabelsController < Groups::ApplicationController
   end
 
   def update
-    if @label.update_attributes(label_params)
+    service = Labels::UpdateService.new(@group, current_user, label_params)
+
+    if service.execute(@label)
       redirect_to group_labels_path(@group)
     else
       render 'edit'
diff --git a/app/controllers/projects/labels_controller.rb b/app/controllers/projects/labels_controller.rb
index 648d5de2e0f..ccfb4bcae93 100644
--- a/app/controllers/projects/labels_controller.rb
+++ b/app/controllers/projects/labels_controller.rb
@@ -40,7 +40,9 @@ class Projects::LabelsController < Projects::ApplicationController
   end
 
   def update
-    if @label.update_attributes(label_params)
+    service = Labels::UpdateService.new(@project, current_user, label_params)
+
+    if service.execute(@label)
       redirect_to namespace_project_labels_path(@project.namespace, @project)
     else
       render 'edit'
diff --git a/app/services/labels/update_service.rb b/app/services/labels/update_service.rb
new file mode 100644
index 00000000000..8eebb0249ae
--- /dev/null
+++ b/app/services/labels/update_service.rb
@@ -0,0 +1,24 @@
+module Labels
+  class UpdateService
+    def initialize(subject, user, params = {})
+      @subject, @user, @params = subject, user, params.dup
+    end
+
+    def execute(label)
+      Label.transaction do
+        if subject.is_a?(Group)
+          subject.projects.each do |project|
+            project_label = project.labels.find_by(title: label.title)
+            project_label.update_attributes(params) if project_label.present?
+          end
+        end
+
+        label.update_attributes(params)
+      end
+    end
+
+    private
+
+    attr_reader :subject, :user, :params
+  end
+end
diff --git a/spec/services/labels/update_service_spec.rb b/spec/services/labels/update_service_spec.rb
new file mode 100644
index 00000000000..e743bdfd0f2
--- /dev/null
+++ b/spec/services/labels/update_service_spec.rb
@@ -0,0 +1,51 @@
+require 'spec_helper'
+
+describe Labels::UpdateService, services: true do
+  describe '#execute' do
+    let(:group) { create(:group) }
+    let!(:project1) { create(:empty_project, group: group) }
+
+    let(:params) do
+      {
+        title: 'Security',
+        color: '#d9534f',
+        description: 'Security related stuff.'
+      }
+    end
+
+    context 'with a group as subject' do
+      let(:label) { create(:label, subject: group, title: 'Bug') }
+
+      subject(:service) { described_class.new(group, double, params) }
+
+      it 'updates the group label' do
+        service.execute(label)
+
+        expect(label).to have_attributes(params)
+      end
+
+      it 'updates the label from projects of the group' do
+        project2 = create(:empty_project, group: group)
+        create(:label, subject: project1, title: 'Bug')
+        create(:label, subject: project2, title: 'Bug')
+
+        service.execute(label)
+
+        expect(project1.labels.where(params)).not_to be_empty
+        expect(project2.labels.where(params)).not_to be_empty
+      end
+    end
+
+    context 'with a project as subject' do
+      subject(:service) { described_class.new(project1, double, params) }
+
+      it 'updates the project label' do
+        label = create(:label, subject: project1)
+
+        service.execute(label)
+
+        expect(label).to have_attributes(params)
+      end
+    end
+  end
+end
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