created db error hanler file

helpers/dbErrorHandler.js

@@ -0,0 +1,47 @@
+"use strict";
+
+/**
+ * Get unique error field name
+ */
+const uniqueMessage = (error) => {
+  let output;
+  try {
+    let fieldName = error.message.substring(
+      error.message.lastIndexOf(".$") + 2,
+      error.message.lastIndexOf("_1")
+    );
+    output =
+      fieldName.charAt(0).toUpperCase() +
+      fieldName.slice(1) +
+      " already exists";
+  } catch (ex) {
+    output = "Unique field already exists";
+  }
+
+  return output;
+};
+
+/**
+ * Get the erroror message from error object
+ */
+exports.errorHandler = (error) => {
+  let message = "";
+
+  if (error.code) {
+    switch (error.code) {
+      case 11000:
+      case 11001:
+        message = uniqueMessage(error);
+        break;
+      default:
+        message = "Something went wrong";
+    }
+  } else {
+    for (let errorName in error.errorors) {
+      if (error.errorors[errorName].message)
+        message = error.errorors[errorName].message;
+    }
+  }
+
+  return message;
+};