chore(agent_connect): update code to work with newer openid connect

remove AGENT_CONNECT_JWKS env key

config/env.example

@@ -56,7 +56,6 @@ FC_PARTICULIER_BASE_URL=""
 AGENT_CONNECT_ID=""
 AGENT_CONNECT_SECRET=""
 AGENT_CONNECT_BASE_URL=""
-AGENT_CONNECT_JWKS=""
 AGENT_CONNECT_REDIRECT=""
 
 # External service: integration with HelpScout (optional)

config/initializers/open_id_connect.rb

@@ -1,61 +1,3 @@
-OpenIDConnect.debug!
-OpenIDConnect.logger = Rails.logger
-Rack::OAuth2.logger = Rails.logger
-# Webfinger.logger = Rails.logger
-SWD.logger = Rails.logger
-
-# the openid_connect gem does not support
-# jwt format in the userinfo call.
-# A PR is open to improve the situation
-# https://github.com/nov/openid_connect/pull/54
-module OpenIDConnect
-  class AccessToken < Rack::OAuth2::AccessToken::Bearer
-    private
-
-    def jwk_loader
-      JSON.parse(URI.parse(ENV['AGENT_CONNECT_JWKS']).read).deep_symbolize_keys
-    end
-
-    def decode_jwt(requested_host, jwt)
-      agent_connect_host = URI.parse(ENV['AGENT_CONNECT_BASE_URL']).host
-
-      if requested_host == agent_connect_host
-        # rubocop:disable Lint/UselessAssignment
-        JWT.decode(jwt, key = nil, verify = true, { algorithms: ['ES256'], jwks: jwk_loader })[0]
-        # rubocop:enable Lint/UselessAssignment
-      else
-        raise "unknwon host : #{requested_host}"
-      end
-    end
-
-    def resource_request
-      res = yield
-      case res.status
-      when 200
-        hash = case parse_type_and_subtype(res.content_type)
-        when 'application/jwt'
-          requested_host = URI.parse(client.userinfo_endpoint).host
-          decode_jwt(requested_host, res.body)
-        when 'application/json'
-          JSON.parse(res.body)
-        end
-        hash&.with_indifferent_access
-      when 400
-        raise BadRequest.new('API Access Faild', res)
-      when 401
-        raise Unauthorized.new('Access Token Invalid or Expired', res)
-      when 403
-        raise Forbidden.new('Insufficient Scope', res)
-      else
-        raise HttpError.new(res.status, 'Unknown HttpError', res)
-      end
-    end
-
-    # https://datatracker.ietf.org/doc/html/rfc2045#section-5.1
-    # - type and subtype are the first member
-    # they are case insensitive
-    def parse_type_and_subtype(content_type)
-      content_type.split(';')[0].strip.downcase
-    end
-  end
+OpenIDConnect.http_config do |config|
+  config.response :jwt
 end