Show staff count on invites page, don't warn if you have 3

app/assets/javascripts/wizard/components/invite-list.js.es6

@@ -29,7 +29,11 @@ export default Ember.Component.extend({
     const users = this.get('users');
 
     this.set('field.value', JSON.stringify(users));
-    this.set('field.warning', users.length ? null : 'invites.none_added');
+
+    const staffCount = this.get('step.fieldsById.staff_count.value');
+    const showWarning = (staffCount < 3 && users.length === 0);
+
+    this.set('field.warning', showWarning ? 'invites.none_added' : null);
   },
 
   actions: {

app/assets/javascripts/wizard/components/staff-count.js.es6

@@ -0,0 +1,7 @@
+import computed from 'ember-addons/ember-computed-decorators';
+
+export default Ember.Component.extend({
+  @computed('field.value')
+  showStaffCount: staffCount => staffCount > 1
+});
+

app/assets/javascripts/wizard/templates/components/staff-count.hbs

@@ -0,0 +1,5 @@
+{{#if showStaffCount}}
+  <div class='staff-count'>
+    {{i18n "wizard.staff_count" count=field.value}}
+  </div>
+{{/if}}

app/assets/stylesheets/wizard.scss

@@ -48,6 +48,10 @@ body.wizard {
   z-index: 10;
 }
 
+.staff-count {
+  font-weight: bold;
+}
+
 .wizard-step-emoji {
 
   .radio-area {

config/locales/client.en.yml

@@ -3236,6 +3236,10 @@ en:
       uploading: "Uploading..."
       quit: "Maybe Later"
 
+      staff_count:
+        one: "Your forum currently has 1 staff member. "
+        other: "Your forum currently has %{count} staff members."
+
       invites:
         add_user: "add"
         none_added: "You haven’t invited any staff. Are you sure you want to continue?"

lib/wizard/builder.rb

@@ -209,6 +209,10 @@ class Wizard
       end
 
       @wizard.append_step('invites') do |step|
+
+        staff_count = User.where("moderator = true or admin = true").where("id <> ?", Discourse.system_user.id).count
+        step.add_field(id: 'staff_count', type: 'component', value: staff_count)
+
         step.add_field(id: 'invite_list', type: 'component')
 
         step.on_update do |updater|