1 files changed, 52 insertions, 0 deletions
diff --git a/app/helpers/gitlab/auth_helper.rb b/app/helpers/gitlab/auth_helper.rb
new file mode 100644
index 00000000000..fbd52dbca3d
--- /dev/null
+++ b/app/helpers/gitlab/auth_helper.rb
@@ -0,0 +1,52 @@
+module Gitlab
+  module AuthHelper
+    PROVIDERS_WITH_ICONS = %w(twitter github gitlab bitbucket google_oauth2).freeze
+    FORM_BASED_PROVIDERS = [/\Aldap/, 'kerberos'].freeze
+
+    def ldap_enabled?
+      Gitlab.config.ldap.enabled
+    end
+
+    def provider_has_icon?(name)
+      PROVIDERS_WITH_ICONS.include?(name.to_s)
+    end
+
+    def auth_providers
+      Gitlab::OAuth::Provider.providers
+    end
+
+    def label_for_provider(name)
+      Gitlab::OAuth::Provider.label_for(name)
+    end
+
+    def form_based_provider?(name)
+      FORM_BASED_PROVIDERS.any? { |pattern| pattern === name.to_s }
+    end
+
+    def form_based_providers
+      auth_providers.select { |provider| form_based_provider?(provider) }
+    end
+
+    def button_based_providers
+      auth_providers.reject { |provider| form_based_provider?(provider) }
+    end
+
+    def provider_image_tag(provider, size = 64)
+      label = label_for_provider(provider)
+
+      if provider_has_icon?(provider)
+        file_name = "#{provider.to_s.split('_').first}_#{size}.png"
+
+        image_tag("auth_buttons/#{file_name}", alt: label, title: "Sign in with #{label}")
+      else
+        label
+      end
+    end
+
+    def auth_active?(provider)
+      current_user.identities.exists?(provider: provider.to_s)
+    end
+
+    extend self
+  end
+end