Log and send a system hook if a blocked user fails to login

Closes #41633

2 files changed, 9 insertions, 4 deletions

diff --git a/app/models/user.rb b/app/models/user.rb
index 4484ee9ff4c..09aa5a7b318 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -53,7 +53,10 @@ class User < ActiveRecord::Base
   serialize :otp_backup_codes, JSON # rubocop:disable Cop/ActiveRecordSerialize
 
   devise :lockable, :recoverable, :rememberable, :trackable,
-    :validatable, :omniauthable, :confirmable, :registerable
+         :validatable, :omniauthable, :confirmable, :registerable
+
+  BLOCKED_MESSAGE = "Your account has been blocked. Please contact your GitLab " \
+                    "administrator if you think this is an error.".freeze
 
   # Override Devise::Models::Trackable#update_tracked_fields!
   # to limit database writes to at most once every hour
@@ -217,8 +220,7 @@ class User < ActiveRecord::Base
       end
 
       def inactive_message
-        "Your account has been blocked. Please contact your GitLab " \
-          "administrator if you think this is an error."
+        BLOCKED_MESSAGE
       end
     end
   end
diff --git a/app/services/system_hooks_service.rb b/app/services/system_hooks_service.rb
index 690918b4a00..af6d77ef5e8 100644
--- a/app/services/system_hooks_service.rb
+++ b/app/services/system_hooks_service.rb
@@ -41,8 +41,11 @@ class SystemHooksService
     when User
       data.merge!(user_data(model))
 
-      if event == :rename
+      case event
+      when :rename
         data[:old_username] = model.username_was
+      when :failed_login
+        data[:state] = model.state
       end
     when ProjectMember
       data.merge!(project_member_data(model))