init project

app/libs/wechat_oauth/error.rb

@@ -0,0 +1,14 @@
+class WechatOauth::Error < StandardError
+  attr_reader :code
+
+  def initialize(code, msg)
+    super(msg)
+    @code = code
+  end
+
+  def message
+    I18n.t("oauth.wechat.#{code}")
+  rescue I18n::MissingTranslationData
+    super
+  end
+end