Disable wizard invites step when local_logins are turned off

app/serializers/wizard_step_serializer.rb

@@ -39,6 +39,8 @@ class WizardStepSerializer < ApplicationSerializer
   end
 
   def description
+    return translate("disabled") if object.disabled
+
     translate("description", base_path: Discourse.base_path)
   end
 

config/locales/server.en.yml

@@ -4112,6 +4112,7 @@ en:
       invites:
         title: "Invite Staff"
         description: "You’re almost done! Let’s invite some people to help <a href='https://blog.discourse.org/2014/08/building-a-discourse-community/' target='blank'>seed your discussions</a> with interesting topics and replies to get your community started."
+        disabled: "Since local logins are disabled, it’s not possible to send invites to anyone. Please proceed to the next step."
 
       finished:
         title: "Your Discourse is Ready!"

lib/wizard/builder.rb

@@ -233,24 +233,27 @@ class Wizard
       end
 
       @wizard.append_step('invites') do |step|
+        if SiteSetting.enable_local_logins
+          staff_count = User.staff.human_users.where('username_lower not in (?)', reserved_usernames).count
+          step.add_field(id: 'staff_count', type: 'component', value: staff_count)
 
-        staff_count = User.staff.human_users.where('username_lower not in (?)', reserved_usernames).count
-        step.add_field(id: 'staff_count', type: 'component', value: staff_count)
+          step.add_field(id: 'invite_list', type: 'component')
 
-        step.add_field(id: 'invite_list', type: 'component')
+          step.on_update do |updater|
+            users = JSON.parse(updater.fields[:invite_list])
 
-        step.on_update do |updater|
-          users = JSON.parse(updater.fields[:invite_list])
-
-          users.each do |u|
-            args = {}
-            args[:moderator] = true if u['role'] == 'moderator'
-            begin
-              Invite.create_invite_by_email(u['email'], @wizard.user, args)
-            rescue => e
-              updater.errors.add(:invite_list, e.message.concat("<br>"))
+            users.each do |u|
+              args = {}
+              args[:moderator] = true if u['role'] == 'moderator'
+              begin
+                Invite.create_invite_by_email(u['email'], @wizard.user, args)
+              rescue => e
+                updater.errors.add(:invite_list, e.message.concat("<br>"))
+              end
             end
           end
+        else
+          step.disabled = true
         end
       end
 

lib/wizard/step.rb

@@ -1,7 +1,7 @@
 class Wizard
   class Step
     attr_reader :id, :updater
-    attr_accessor :index, :fields, :next, :previous, :banner
+    attr_accessor :index, :fields, :next, :previous, :banner, :disabled
 
     def initialize(id)
       @id = id

spec/components/wizard/wizard_builder_spec.rb

@@ -27,4 +27,14 @@ describe Wizard::Builder do
     expect(wizard.steps).to be_blank
   end
 
+  it "returns wizard with disabled invites step when local_logins are off" do
+    SiteSetting.enable_local_logins = false
+
+    wizard = Wizard::Builder.new(moderator).build
+
+    invites_step = wizard.steps.find { |s| s.id == "invites" }
+    expect(invites_step.fields).to be_blank
+    expect(invites_step.disabled).to be_truthy
+  end
+
 end