feat: log additionally axios error (#6)

* feat: log additionally axios error

lib/responseBuilder.js

@@ -51,6 +51,43 @@ module.exports = function ResponseBuilder() {
     return response;
   };
 
+  /**
+   * Return error object with only necessary props according to axios docs https://github.com/axios/axios#handling-errors
+   * @param {Error} axiosError axios error object
+   * @return {number} http code
+   * @private
+   */
+  self._getAxiosError = (axiosError) => {
+    const errorInfo = {
+      config: axiosError.config,
+    };
+
+    if (axiosError.response) {
+      // The request was made and the server responded with a status code
+      // that falls out of the range of 2xx
+      return {
+        ...errorInfo,
+        data: axiosError.response.data,
+        status: axiosError.response.status,
+        headers: axiosError.response.headers,
+      };
+    }
+    if (axiosError.request) {
+      // The request was made but no response was received
+      // `error.request` is an instance of http.ClientRequest in node.js
+      return {
+        ...errorInfo,
+        request: axiosError.request,
+      };
+    }
+
+    // Something happened in setting up the request that triggered an Error
+    return {
+      ...errorInfo,
+      message: axiosError.message,
+    };
+  };
+
   /**
    * Handle error response
    * @param {Error} error error object or something and inheirits from it
@@ -60,6 +97,10 @@ module.exports = function ResponseBuilder() {
    * @private
    */
   self._errorResponse = (error, codeOverride, req) => {
+    if (error && error.isAxiosError) {
+      log.error(`@backend-utils:errorResponse - error:axios:${JSON.stringify(self._getAxiosError(error))}`);
+    }
+
     if (!(error instanceof Error)) {
       if (error instanceof String) {
         return self._errorResponse(new VError(error), codeOverride);