feat: openid connect support (#2873)

app/views/sessions/new.html.haml

@@ -6,13 +6,19 @@
 .subPageBox__content
   = form_tag login_path, :class => 'loginForm' do
     = hidden_field_tag 'return_to', params[:return_to]
-    - if params[:return_to] && params[:return_to] =~ /\/join\//
-      %p.loginForm__invite.warningBox.u-margin Login to your existing account to accept your invitation.
 
-    %p.loginForm__input= text_field_tag 'email_address', '', :type => 'email', :autocomplete => 'off', :spellcheck => 'false', :class => 'input input--text input--onWhite', :placeholder => "Your e-mail address", :autofocus => true, :tabindex => 1
-    %p.loginForm__input= password_field_tag 'password', '', :class => 'input input--text input--onWhite', :placeholder => "Your password", :tabindex => 2
-    .loginForm__submit
-      %ul.loginForm__links
-        %li= link_to "Forgotten your password?", login_reset_path(:return_to => params[:return_to])
-      %p= submit_tag "Login", :class => 'button button--positive', :tabindex => 3
+    - if Postal::Config.oidc.enabled?
+      .loginForm__oidcButton
+        = link_to "Login with #{Postal::Config.oidc.name}", "/auth/oidc", method: :post, class: 'button button--full'
 
+    - if Postal::Config.oidc.enabled? && Postal::Config.oidc.local_authentication_enabled?
+      .loginForm__divider
+      %p.loginForm__localTitle or login with a local user
+
+    - if Postal::Config.oidc.local_authentication_enabled?
+      %p.loginForm__input= text_field_tag 'email_address', '', :type => 'email', :spellcheck => 'false', :class => 'input input--text input--onWhite', :placeholder => "Your e-mail address", :autofocus => !Postal::Config.oidc.enabled?, :tabindex => 1
+      %p.loginForm__input= password_field_tag 'password', '', :class => 'input input--text input--onWhite', :placeholder => "Your password", :tabindex => 2
+      .loginForm__submit
+        %ul.loginForm__links
+          %li= link_to "Forgotten your password?", login_reset_path(:return_to => params[:return_to])
+        %p= submit_tag "Login", :class => 'button button--positive', :tabindex => 3