[#923] OAuth consumer improvements, fixes, refactoring.

lib/pleroma/web/auth/authenticator.ex

@@ -33,4 +33,10 @@ defmodule Pleroma.Web.Auth.Authenticator do
   def auth_template do
     implementation().auth_template() || Pleroma.Config.get(:auth_template, "show.html")
   end
+
+  @callback oauth_consumer_template() :: String.t() | nil
+  def oauth_consumer_template do
+    implementation().oauth_consumer_template() ||
+      Pleroma.Config.get(:oauth_consumer_template, "consumer.html")
+  end
 end

lib/pleroma/web/auth/ldap_authenticator.ex

@@ -51,6 +51,8 @@ defmodule Pleroma.Web.Auth.LDAPAuthenticator do
 
   def auth_template, do: nil
 
+  def oauth_consumer_template, do: nil
+
   defp ldap_user(name, password) do
     ldap = Pleroma.Config.get(:ldap, [])
     host = Keyword.get(ldap, :host, "localhost")

lib/pleroma/web/auth/pleroma_authenticator.ex

@@ -92,4 +92,6 @@ defmodule Pleroma.Web.Auth.PleromaAuthenticator do
   end
 
   def auth_template, do: nil
+
+  def oauth_consumer_template, do: nil
 end