REFACTOR: Migrate InstagramAuthenticator to use ManagedAuthenticator (#7081)

lib/auth/instagram_authenticator.rb

@@ -1,5 +1,4 @@
-class Auth::InstagramAuthenticator < Auth::Authenticator
-
+class Auth::InstagramAuthenticator < Auth::ManagedAuthenticator
   def name
     "instagram"
   end
@@ -8,67 +7,6 @@ class Auth::InstagramAuthenticator < Auth::Authenticator
     SiteSetting.enable_instagram_logins
   end
 
-  def description_for_user(user)
-    info = InstagramUserInfo.find_by(user_id: user.id)
-    info&.screen_name || ""
-  end
-
-  def can_revoke?
-    true
-  end
-
-  def revoke(user, skip_remote: false)
-    info = InstagramUserInfo.find_by(user_id: user.id)
-    raise Discourse::NotFound if info.nil?
-    # Instagram does not have any way for us to revoke tokens on their end
-    info.destroy!
-    true
-  end
-
-  def can_connect_existing_user?
-    true
-  end
-
-  def after_authenticate(auth_token, existing_account: nil)
-
-    result = Auth::Result.new
-
-    data = auth_token[:info]
-
-    result.username = screen_name = data["nickname"]
-    result.name = name = data["name"].slice!(0)
-    instagram_user_id = auth_token["uid"]
-
-    result.extra_data = {
-      instagram_user_id: instagram_user_id,
-      instagram_screen_name: screen_name
-    }
-
-    user_info = InstagramUserInfo.find_by(instagram_user_id: instagram_user_id)
-
-    if existing_account && (user_info.nil? || existing_account.id != user_info.user_id)
-      user_info.destroy! if user_info
-      user_info = InstagramUserInfo.create!(
-        user_id: existing_account.id,
-        screen_name: screen_name,
-        instagram_user_id: instagram_user_id
-      )
-    end
-
-    result.user = user_info&.user
-
-    result
-  end
-
-  def after_create_account(user, auth)
-    data = auth[:extra_data]
-    InstagramUserInfo.create(
-      user_id: user.id,
-      screen_name: data[:instagram_screen_name],
-      instagram_user_id: data[:instagram_user_id]
-    )
-  end
-
   def register_middleware(omniauth)
     omniauth.provider :instagram,
            setup: lambda { |env|
@@ -77,5 +15,4 @@ class Auth::InstagramAuthenticator < Auth::Authenticator
               strategy.options[:client_secret] = SiteSetting.instagram_consumer_secret
            }
   end
-
 end