add option for debugging of auth

config/locales/server.en.yml

@@ -12,4 +12,5 @@ en:
     oauth2_json_email_path: "Path in the OAuth2 User JSON to the user's email: user.email.primary"
     oauth2_email_verified: "Check this if the OAuth2 site has verified the email"
     oauth2_send_auth_header: "Send the token as an HTTP Authorization header"
+    oauth2_debug_auth: "Include rich debugging information in your logs"
 

config/settings.yml

@@ -13,6 +13,7 @@ login:
   oauth2_json_email_path: ''
   oauth2_email_verified: false
   oauth2_send_auth_header: true
+  oauth2_debug_auth: false
   oauth2_button_title:
     default: 'with OAuth2'
     client: true

plugin.rb

@@ -48,10 +48,17 @@ class OAuth2BasicAuthenticator < ::Auth::OAuth2Authenticator
     end
   end
 
+  def debug(info)
+    Rails.logger.warn("OAuth2 Debugging: #{info}") if SiteSetting.oauth2_debug_auth
+  end
+
   def fetch_user_details(token)
     user_json_url = SiteSetting.oauth2_user_json_url.sub(':token', token)
+    debug("user_json_url: #{user_json_url}")
     user_json = JSON.parse(open(user_json_url, 'Authorization' => "Bearer #{token}" ).read)
 
+    debug("user_json: #{user_json}")
+
     result = {}
     if user_json.present?
       json_walk(result, user_json, :user_id)
@@ -64,6 +71,7 @@ class OAuth2BasicAuthenticator < ::Auth::OAuth2Authenticator
   end
 
   def after_authenticate(auth)
+    debug("auth response \n\n#{auth}")
     result = Auth::Result.new
     token = auth['credentials']['token']
     user_details = fetch_user_details(token)