Update OAuth inflection to match spec (#35160)

app/controllers/oauth/authorizations_controller.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-class Oauth::AuthorizationsController < Doorkeeper::AuthorizationsController
+class OAuth::AuthorizationsController < Doorkeeper::AuthorizationsController
   skip_before_action :authenticate_resource_owner!
 
   before_action :store_current_location

app/controllers/oauth/authorized_applications_controller.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-class Oauth::AuthorizedApplicationsController < Doorkeeper::AuthorizedApplicationsController
+class OAuth::AuthorizedApplicationsController < Doorkeeper::AuthorizedApplicationsController
   skip_before_action :authenticate_resource_owner!
 
   before_action :store_current_location

app/controllers/oauth/tokens_controller.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-class Oauth::TokensController < Doorkeeper::TokensController
+class OAuth::TokensController < Doorkeeper::TokensController
   def revoke
     unsubscribe_for_token if token.present? && authorized? && token.accessible?
 

app/controllers/oauth/userinfo_controller.rb

@@ -1,11 +1,11 @@
 # frozen_string_literal: true
 
-class Oauth::UserinfoController < Api::BaseController
+class OAuth::UserinfoController < Api::BaseController
   before_action -> { doorkeeper_authorize! :profile }, only: [:show]
   before_action :require_user!
 
   def show
     @account = current_account
-    render json: @account, serializer: OauthUserinfoSerializer
+    render json: @account, serializer: OAuthUserinfoSerializer
   end
 end

app/controllers/well_known/oauth_metadata_controller.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 module WellKnown
-  class OauthMetadataController < ActionController::Base # rubocop:disable Rails/ApplicationController
+  class OAuthMetadataController < ActionController::Base # rubocop:disable Rails/ApplicationController
     include CacheConcern
 
     # Prevent `active_model_serializer`'s `ActionController::Serialization` from calling `current_user`
@@ -13,8 +13,8 @@ module WellKnown
       # new OAuth scopes are added), we don't use expires_in to cache upstream,
       # instead just caching in the rails cache:
       render_with_cache(
-        json: ::OauthMetadataPresenter.new,
-        serializer: ::OauthMetadataSerializer,
+        json: ::OAuthMetadataPresenter.new,
+        serializer: ::OAuthMetadataSerializer,
         content_type: 'application/json',
         expires_in: 15.minutes
       )

app/presenters/oauth_metadata_presenter.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-class OauthMetadataPresenter < ActiveModelSerializers::Model
+class OAuthMetadataPresenter < ActiveModelSerializers::Model
   include RoutingHelper
 
   attributes :issuer, :authorization_endpoint, :token_endpoint,

app/serializers/oauth_metadata_serializer.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-class OauthMetadataSerializer < ActiveModel::Serializer
+class OAuthMetadataSerializer < ActiveModel::Serializer
   attributes :issuer, :authorization_endpoint, :token_endpoint,
              :revocation_endpoint, :userinfo_endpoint, :scopes_supported,
              :response_types_supported, :response_modes_supported,

app/serializers/oauth_userinfo_serializer.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-class OauthUserinfoSerializer < ActiveModel::Serializer
+class OAuthUserinfoSerializer < ActiveModel::Serializer
   include RoutingHelper
 
   attributes :iss, :sub, :name, :preferred_username, :profile, :picture