From 8c9f4ce1a3b87dd9060887b4b596d8f371ccba8b Mon Sep 17 00:00:00 2001
From: Carlos Justiniano <carlos.justiniano@gmail.com>
Date: Mon, 16 Oct 2017 14:15:27 -0400
Subject: [PATCH]  Improved safeJSONStringfy that serializes Error objects.
 (#154)

* Ensure that services include web routes to they can potentialy serve websites.

* Improved safeJSONStringfy that serializes Error objects.
---
 lib/utils.js      | 17 +++++++++++++----
 package-lock.json |  2 +-
 package.json      |  2 +-
 3 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/lib/utils.js b/lib/utils.js
index 78661e0..c790a42 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -23,14 +23,23 @@ class Utils {
   /**
    * @name safeJSONStringify
    * @summary Safe JSON stringify
-   * @description Note, that this function if very different from the
-   *  JSON.stringify function in that it won't accept non objects.
    * @param {object} obj - object to stringify
    * @return {string} string - stringified object.
-   *   Returns undefined if the object isn't a valid object or can't be stringified
    */
   static safeJSONStringify(obj) {
-    return JSON.stringify(obj);
+    // replaceErrors below credited to Jonathan Lonowski via Stackoverflow:
+    // https://stackoverflow.com/questions/18391212/is-it-not-possible-to-stringify-an-error-using-json-stringify
+    let replaceErrors = (key, value) => {
+      if (value instanceof Error) {
+        let error = {};
+        Object.getOwnPropertyNames(value).forEach((key) => {
+          error[key] = value[key];
+        });
+        return error;
+      }
+      return value;
+    };
+    return JSON.stringify(obj, replaceErrors);
   }
 
   /**
diff --git a/package-lock.json b/package-lock.json
index aee29f2..87d2985 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "hydra",
-  "version": "1.4.18",
+  "version": "1.4.20",
   "lockfileVersion": 1,
   "dependencies": {
     "acorn": {
diff --git a/package.json b/package.json
index 775b2a4..0f16415 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "hydra",
-  "version": "1.4.18",
+  "version": "1.4.20",
   "license": "MIT",
   "author": "Carlos Justiniano",
   "contributors": "https://github.com/flywheelsports/hydra/graphs/contributors",