Scan and show status in progress bar on launch

lib/launchpad.rb

@@ -1,6 +1,8 @@
 require 'lib/launchpad/settings'
+require 'lib/launchpad/patcher'
 require 'lib/launchpad/index'
 require 'lib/launchpad/gui/application'
+require 'lib/launchpad/gui/controllers/update_manager'
 require 'lib/launchpad/gui/controllers/main_controller'
 require 'lib/launchpad/gui/controllers/options_controller'
 

lib/launchpad/gui/controllers/main_controller.rb

@@ -4,6 +4,15 @@ class MainController
     include JRubyFX::Controller
     fxml 'main.fxml'
 
+    attr_reader :update_manager, :status
+
+    def initialize
+      super
+
+      @update_manager = UpdateManager.new self
+      @stage.on_shown { update_manager.scan }
+    end
+
     # Triggered when the options button is pressed
     def show_options
       @options ||=

lib/launchpad/gui/controllers/update_manager.rb

@@ -0,0 +1,25 @@
+module Launchpad
+  # Synchronizes the state of the patcher with the view
+  class UpdateManager
+    attr_reader :controller, :patcher
+
+    def initialize(controller)
+      @controller = controller
+      @patcher = Patcher.new
+    end
+
+    def scan
+      patcher.in_sync? ? ready_to_launch : ready_to_update
+    end
+
+    private
+
+    def ready_to_launch
+      controller.status.set_text 'Ready'
+    end
+
+    def ready_to_update
+      controller.status.set_text 'Update required...'
+    end
+  end
+end

lib/launchpad/gui/fxml/main.fxml

@@ -12,7 +12,7 @@
 <?import javafx.scene.paint.*?>
 <?import javafx.scene.text.*?>
 
-<AnchorPane prefHeight="400.0" prefWidth="800.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1">
+<AnchorPane prefHeight="400.0" prefWidth="800.0" xmlns="http://javafx.com/javafx/8.0.40" xmlns:fx="http://javafx.com/fxml/1">
    <children>
       <WebView prefHeight="350.0" />
       <AnchorPane layoutY="350.0" prefHeight="46.0" prefWidth="800.0">
@@ -21,7 +21,7 @@
             <Button layoutX="662.0" layoutY="11.0" mnemonicParsing="false" text="Scan" />
             <Button layoutX="585.0" layoutY="11.0" mnemonicParsing="false" onAction="#show_options" text="Options" />
             <ProgressBar layoutX="14.0" layoutY="11.0" prefHeight="27.0" prefWidth="559.0" progress="0.0" />
-            <Label layoutX="33.0" layoutY="17.0" text="Info" />
+            <Label fx:id="status" layoutX="33.0" layoutY="17.0" text="Info" />
          </children>
       </AnchorPane>
    </children>

lib/launchpad/patcher.rb

@@ -0,0 +1,14 @@
+module Launchpad
+  # Updates installation directory with the required files
+  class Patcher
+    attr_reader :index
+
+    def initialize
+      @index = Index.new
+    end
+
+    def in_sync?
+      index.diff.empty?
+    end
+  end
+end

spec/lib/launchpad/gui/controllers/main_controller_spec.rb

@@ -3,7 +3,26 @@
 describe Launchpad::MainController, type: :controller do
   subject { described_class.new stage: stage_double }
 
-  let(:stage_double) { double 'stage' }
+  let(:stage_double) { double 'stage', on_shown: true }
+
+  before { allow(Launchpad::UpdateManager).to receive :new }
+
+  describe '#initialize' do
+    let(:update_manager) { double 'update_manager' }
+
+    before do
+      allow(Launchpad::UpdateManager).to receive(:new).and_return update_manager
+      subject
+    end
+
+    it 'sets up an update manager' do
+      expect(subject.update_manager).to be update_manager
+    end
+
+    it 'sets up the on_shown hook' do
+      expect(stage_double).to have_received :on_shown
+    end
+  end
 
   describe '#show_options' do
     let(:options_stage) { double 'stage' }

spec/lib/launchpad/gui/controllers/update_manager_spec.rb

@@ -0,0 +1,30 @@
+require 'spec_helper'
+
+describe Launchpad::UpdateManager do
+  subject { described_class.new controller }
+
+  let(:controller) { double :controller, status: double(set_text: nil) }
+
+  before { allow(Launchpad::Patcher).to receive(:new).and_return patcher }
+
+  describe '#scan' do
+    before { subject.scan }
+
+    context 'when fils are in sync' do
+      let(:patcher) { double :patcher, in_sync?: true }
+
+      it 'displays a message that files are synced' do
+        expect(controller.status).to have_received(:set_text).with 'Ready'
+      end
+    end
+
+    context 'when fils are out of sync' do
+      let(:patcher) { double :patcher, in_sync?: false }
+
+      it 'displays a message that there are files that need syncing' do
+        expect(controller.status)
+          .to have_received(:set_text).with 'Update required...'
+      end
+    end
+  end
+end

spec/lib/launchpad/patcher_spec.rb

@@ -0,0 +1,21 @@
+require 'spec_helper'
+
+describe Launchpad::Patcher do
+  let(:index) { double :index }
+
+  before { allow(Launchpad::Index).to receive(:new).and_return index }
+
+  describe '#in_sync?' do
+    context 'when the index reports a diff' do
+      let(:index) { double diff: [:x, :y, :z] }
+
+      it { is_expected.to_not be_in_sync }
+    end
+
+    context 'when the index diff is empty' do
+      let(:index) { double diff: [] }
+
+      it { is_expected.to be_in_sync }
+    end
+  end
+end