Add new class Dialog::ContainerTemplateServiceDialog.

app/models/dialog/container_template_service_dialog.rb

@@ -0,0 +1,48 @@
+class Dialog
+  class ContainerTemplateServiceDialog
+    def self.create_dialog(label, parameters)
+      new.create_dialog(label, parameters)
+    end
+
+    # This dialog is to be used by a container template service
+    def create_dialog(label, parameters)
+      Dialog.new(:label => label, :buttons => "submit,cancel").tap do |dialog|
+        tab = dialog.dialog_tabs.build(:display => "edit", :label => "Basic Information", :position => 0)
+        add_parameters_group(tab, 0, parameters)
+        dialog.save!
+      end
+    end
+
+    private
+
+    def add_parameters_group(tab, position, parameters)
+      tab.dialog_groups.build(
+        :display  => "edit",
+        :label    => "Parameters",
+        :position => position
+      ).tap do |dialog_group|
+        parameters.each_with_index do |param, index|
+          add_parameter_field(param, dialog_group, index)
+        end
+      end
+    end
+
+    def add_parameter_field(param, group, position)
+      options = {
+        :type          => "DialogFieldTextBox",
+        :name          => "param_#{param.name}",
+        :data_type     => "string",
+        :display       => "edit",
+        :required      => param.required,
+        :default_value => param.value,
+        :label         => param.name.tr("_", " ").titleize,
+        :description   => param.description,
+        :position      => position,
+        :dialog_group  => group
+      }
+      options[:label] += " (Auto-generated if empty)" if param.generate == 'expression'
+
+      group.dialog_fields.build(options)
+    end
+  end
+end

spec/factories/container_template.rb

@@ -0,0 +1,4 @@
+FactoryGirl.define do
+  factory :container_template do
+  end
+end

spec/factories/container_template_parameter.rb

@@ -0,0 +1,4 @@
+FactoryGirl.define do
+  factory :container_template_parameter do
+  end
+end

spec/models/dialog/container_template_service_dialog_spec.rb

@@ -0,0 +1,59 @@
+describe Dialog::ContainerTemplateServiceDialog do
+  describe "#create_dialog" do
+    let(:container_template) { FactoryGirl.create(:container_template) }
+    let(:params) { [] }
+    before do
+      3.times do |n|
+        params << FactoryGirl.create(:container_template_parameter,
+                                     :name     => "name_#{n + 1}",
+                                     :value    => "value_#{n + 1}",
+                                     :required => true)
+      end
+    end
+
+    it "creates a dialog for a container template with parameters" do
+      container_template.container_template_parameters = params
+
+      dialog = described_class.create_dialog("mydialog1", container_template.container_template_parameters)
+      expect(dialog).to have_attributes(:label => 'mydialog1', :buttons => "submit,cancel")
+
+      tabs = dialog.dialog_tabs
+      expect(tabs.size).to eq(1)
+      assert_main_tab(tabs[0])
+    end
+
+    it "raises an error for a container template with no parameters" do
+      expect { described_class.create_dialog("mydialog2", container_template.container_template_parameters) }
+        .to raise_error(ActiveRecord::RecordInvalid)
+    end
+  end
+
+  def assert_main_tab(tab)
+    assert_tab_attributes(tab)
+
+    groups = tab.dialog_groups
+    expect(groups.size).to eq(1)
+
+    assert_parameters_group(groups[0])
+  end
+
+  def assert_tab_attributes(tab)
+    expect(tab).to have_attributes(:label => "Basic Information", :display => "edit")
+  end
+
+  def assert_field(field, clss, attributes)
+    expect(field).to be_kind_of clss
+    expect(field).to have_attributes(attributes)
+  end
+
+  def assert_parameters_group(group)
+    expect(group).to have_attributes(:label => "Parameters", :display => "edit")
+
+    fields = group.dialog_fields
+    expect(fields.size).to eq(3)
+
+    assert_field(fields[0], DialogFieldTextBox, :name => "param_#{params[0].name}", :default_value => params[0].value, :data_type => 'string')
+    assert_field(fields[1], DialogFieldTextBox, :name => "param_#{params[1].name}", :default_value => params[1].value, :data_type => 'string')
+    assert_field(fields[2], DialogFieldTextBox, :name => "param_#{params[2].name}", :default_value => params[2].value, :data_type => 'string')
+  end
+end