Fixes #3007 - Customer invitation doesn't work if "customer" role is name wise missing.

app/assets/javascripts/app/controllers/_dashboard/first_steps.coffee

@@ -48,7 +48,7 @@ class App.DashboardFirstSteps extends App.Controller
       #container: @el.closest('.content')
       head: 'Invite Customer'
       screen: 'invite_customer'
-      role: 'Customer'
+      signup: true
     )
 
   testTicketLoading: =>

app/assets/javascripts/app/controllers/widget/invite_user.coffee

@@ -48,11 +48,13 @@ class App.InviteUser extends App.WizardModal
     # set invite flag
     @params.invite = true
 
-    # find agent role
-    if @role
-      role = App.Role.findByAttribute('name', @role)
-      if role
-        @params.role_ids = role.id
+    # find signup roles
+    if @signup
+      @params.role_ids = App.Role.search(
+        filter:
+          active: true
+          default_at_signup: true
+      ).map((role) -> role.id)
 
     user = new App.User
     user.load(@params)

spec/system/dashboard_spec.rb

@@ -13,4 +13,23 @@ RSpec.describe 'Dashboard', type: :system, authenticated_as: true do
     expect(page).to have_css('.ticket_in_process > div > div.stat-title', text: /Your tickets in process/i)
     expect(page).to have_css('.ticket_reopen > div > div.stat-title', text: /Reopening rate/i)
   end
+
+  context 'when customer role is named different', authenticated_as: :authenticate do
+    def authenticate
+      Role.find_by(name: 'Customer').update(name: 'Public')
+      true
+    end
+
+    it 'invites a customer user' do
+      visit 'dashboard'
+      find('div.tab[data-area=first-steps-widgets]').click
+      find('.js-inviteCustomer').click
+      fill_in 'Firstname', with: 'Nick'
+      fill_in 'Lastname', with: 'Braun'
+      fill_in 'Email', with: 'nick.braun@zammad.org'
+      click_on 'Invite'
+      await_empty_ajax_queue
+      expect(User.find_by(firstname: 'Nick').roles).to eq([Role.find_by(name: 'Public')])
+    end
+  end
 end