From 0798d069f362ba89d49ce8eb5df5038366a6653b Mon Sep 17 00:00:00 2001
From: Ronnie Winter <32260852+ro2ni3@users.noreply.github.com>
Date: Wed, 24 Oct 2018 13:51:02 +0100
Subject: [PATCH] Makes list on repeated fieldnames

This change allows repeated fieldnames to not override the previous one.
Instead, if it checks that the fieldname was already parsed, it will make it into a list, and push the new value
This would be a solution for this issue: https://github.com/myshenin/aws-lambda-multipart-parser/issues/23
---
 index.js | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/index.js b/index.js
index aa5c684..c3db3f2 100644
--- a/index.js
+++ b/index.js
@@ -24,7 +24,17 @@ module.exports.parse = (event, spotText) => {
                         item.slice(item.search(/Content-Type:\s.+/g) + item.match(/Content-Type:\s.+/g)[0].length + 4, -4),
                 };
             } else if (/name=".+"/g.test(item)){
-                result[item.match(/name=".+"/g)[0].slice(6, -1)] = item.slice(item.search(/name=".+"/g) + item.match(/name=".+"/g)[0].length + 4, -4);
+                const fieldname = item.match(/name=".+"/g)[0].slice(6, -1);
+                const val = item.slice(item.search(/name=".+"/g) + item.match(/name=".+"/g)[0].length + 4, -4);              
+
+                if (fieldname in result) {
+                    if (!Array.isArray(result[fieldname])) {
+                        result[fieldname] = [result[fieldname]]
+                    }
+                    result[fieldname].push(val)
+                } else {
+                    result[fieldname] = val
+                }
             }
         });
     return result;