Remove hub username integration

app/services/user_activator.rb

@@ -6,13 +6,10 @@ class UserActivator
     @session = session
     @cookies = cookies
     @request = request
-    @settings = SiteSetting
-    @hub = DiscourseHub
     @message = nil
   end
 
   def start
-    register_username
   end
 
   def finish
@@ -26,7 +23,7 @@ class UserActivator
   end
 
   def factory
-    if @settings.must_approve_users?
+    if SiteSetting.must_approve_users?
       ApprovalActivator
     elsif !user.active?
       EmailActivator
@@ -35,11 +32,6 @@ class UserActivator
     end
   end
 
-  def register_username
-    if user.valid? && @settings.call_discourse_hub?
-      @hub.register_username(user.username, user.email)
-    end
-  end
 end
 
 class ApprovalActivator < UserActivator

app/services/user_destroyer.rb

@@ -61,7 +61,6 @@ class UserDestroyer
           end
 
           StaffActionLogger.new(@actor == user ? Discourse.system_user : @actor).log_user_deletion(user, opts.slice(:context))
-          DiscourseHub.unregister_username(user.username) if SiteSetting.call_discourse_hub?
           MessageBus.publish "/file-change", ["refresh"], user_ids: [user.id]
         end
       end

app/services/username_checker_service.rb

@@ -5,54 +5,13 @@ class UsernameCheckerService
       validator = UsernameValidator.new(username)
       if !validator.valid_format?
         {errors: validator.errors}
-      elsif !SiteSetting.call_discourse_hub?
-        check_username_locally(username)
       else
-        check_username_with_hub_server(username, email)
-      end
-    elsif email and SiteSetting.call_discourse_hub?
-      username_from_hub = DiscourseHub.username_for_email(email)
-      if username_from_hub && User.username_available?(username_from_hub)
-        {suggestion: username_from_hub}
-      else
-        {suggestion: nil}
+        check_username_availability(username)
       end
     end
   end
 
-  # Contact the Discourse Hub server
-  def check_username_with_hub_server(username, email)
-    available_locally             = User.username_available?(username)
-    info                          = available_globally_and_suggestion_from_hub(username, email)
-    available_globally            = info[:available_globally]
-    suggestion_from_discourse_hub = info[:suggestion_from_discourse_hub]
-    global_match                  = info[:global_match]
-    if available_globally && available_locally
-      { available: true, global_match: (global_match ? true : false) }
-    elsif available_locally && !available_globally
-      if email.present?
-        # Nickname and email do not match what's registered on the discourse hub.
-        { available: false, global_match: false, suggestion: suggestion_from_discourse_hub }
-      else
-        # The username is available locally, but is registered on the discourse hub.
-        # We need an email to see if the username belongs to this person.
-        # Don't give a suggestion until we get the email and try to match it with on the discourse hub.
-        { available: false }
-      end
-    elsif available_globally && !available_locally
-      # Already registered on this site with the matching username and email address. Why are you signing up again?
-      { available: false, suggestion: UserNameSuggester.suggest(username) }
-    else
-      # Not available anywhere.
-      render_unavailable_with_suggestion(suggestion_from_discourse_hub)
-    end
-  end
-
-  def render_unavailable_with_suggestion(suggestion)
-    { available: false, suggestion: suggestion }
-  end
-
-  def check_username_locally(username)
+  def check_username_availability(username)
     if User.username_available?(username)
       { available: true }
     else
@@ -60,18 +19,4 @@ class UsernameCheckerService
     end
   end
 
-  def available_globally_and_suggestion_from_hub(username, email)
-    if email.present?
-      global_match, available, suggestion =
-        DiscourseHub.username_match?(username, email)
-      { available_globally:            available || global_match,
-        suggestion_from_discourse_hub: suggestion,
-        global_match:                  global_match }
-    else
-      args = DiscourseHub.username_available?(username)
-      { available_globally:            args[0],
-        suggestion_from_discourse_hub: args[1],
-        global_match:                  false }
-    end
-  end
 end