From 68cfdba7018172d502d4b98aad02e86d22a6a401 Mon Sep 17 00:00:00 2001
From: Douglas Barbosa Alexandre <dbalexandre@gmail.com>
Date: Mon, 8 Aug 2016 16:34:38 -0300
Subject: Add service to generate default board lists

---
 app/services/boards/lists/generate_service.rb      | 36 +++++++++++++++++++
 .../services/boards/lists/generate_service_spec.rb | 40 ++++++++++++++++++++++
 2 files changed, 76 insertions(+)
 create mode 100644 app/services/boards/lists/generate_service.rb
 create mode 100644 spec/services/boards/lists/generate_service_spec.rb

diff --git a/app/services/boards/lists/generate_service.rb b/app/services/boards/lists/generate_service.rb
new file mode 100644
index 00000000000..20f7e7e0d53
--- /dev/null
+++ b/app/services/boards/lists/generate_service.rb
@@ -0,0 +1,36 @@
+module Boards
+  module Lists
+    class GenerateService < Boards::BaseService
+      def execute
+        return false unless board.lists.label.empty?
+
+        List.transaction do
+          label_params.each { |params| create_list(params) }
+        end
+
+        true
+      end
+
+      private
+
+      def create_list(params)
+        label = find_or_create_label(params)
+        CreateService.new(project, user, label_id: label.id).execute
+      end
+
+      def find_or_create_label(params)
+        project.labels.create_with(color: params[:color])
+                      .find_or_create_by(name: params[:name])
+      end
+
+      def label_params
+        [
+          { name: 'Development', color: '#5CB85C' },
+          { name: 'Testing',     color: '#F0AD4E' },
+          { name: 'Production',  color: '#FF5F00' },
+          { name: 'Ready',       color: '#FF0000' }
+        ]
+      end
+    end
+  end
+end
diff --git a/spec/services/boards/lists/generate_service_spec.rb b/spec/services/boards/lists/generate_service_spec.rb
new file mode 100644
index 00000000000..9fd39122737
--- /dev/null
+++ b/spec/services/boards/lists/generate_service_spec.rb
@@ -0,0 +1,40 @@
+require 'spec_helper'
+
+describe Boards::Lists::GenerateService, services: true do
+  describe '#execute' do
+    let(:project) { create(:project_with_board) }
+    let(:board)   { project.board }
+    let(:user)    { create(:user) }
+
+    subject(:service) { described_class.new(project, user) }
+
+    context 'when board lists is empty' do
+      it 'creates the default lists' do
+        expect { service.execute }.to change(board.lists, :count).by(4)
+      end
+    end
+
+    context 'when board lists is not empty' do
+      it 'does not creates the default lists' do
+        create(:list, board: board)
+
+        expect { service.execute }.not_to change(board.lists, :count)
+      end
+    end
+
+    context 'when project labels does not contains any list label' do
+      it 'creates labels' do
+        expect { service.execute }.to change(project.labels, :count).by(4)
+      end
+    end
+
+    context 'when project labels contains some of list label' do
+      it 'creates the missing labels' do
+        create(:label, project: project, name: 'Development')
+        create(:label, project: project, name: 'Ready')
+
+        expect { service.execute }.to change(project.labels, :count).by(2)
+      end
+    end
+  end
+end
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