massinput js util cleanup

static/js/utils/massInput.js

@@ -37,7 +37,7 @@
         throw new Error('Mass Input utility cannot be setup without being wrapped in a <form>!');
       }
 
-      massInputFormSubmitHandler = makeSubmitHandler(massInputForm);
+      massInputFormSubmitHandler = makeSubmitHandler();
       massInputForm.addEventListener('submit', massInputFormSubmitHandler);
 
       // mark initialized
@@ -50,7 +50,7 @@
       };
     }
 
-    function makeSubmitHandler(massInputForm) {
+    function makeSubmitHandler() {
       if (!HttpClient) {
         throw new Error('HttpClient not found!');
       }
@@ -73,16 +73,7 @@
         }
 
         event.preventDefault();
-        var formData = new FormData(massInputForm);
-
-        var formBody = [];
-
-        for(var formField of formData) {
-          var encodedKey = encodeURIComponent(formField[0]);
-          var encodedValue = encodeURIComponent(formField[1]);
-          formBody.push(encodedKey + "=" + encodedValue);
-        }
-        var requestBody = formBody.join("&");
+        var requestBody = serializeForm();
 
         if (requestFn) {
           requestFn(
@@ -93,7 +84,7 @@
             },
             requestBody,
           ).then(function(response) {
-            return response.text()
+            return response.text();
           }).then(function(response) {
             processResponse(response);
           });
@@ -114,6 +105,19 @@
       }
     }
 
+    function serializeForm() {
+      var formData = new FormData(massInputForm);
+      var formBody = [];
+
+      for(var formField of formData) {
+        var encodedKey = encodeURIComponent(formField[0]);
+        var encodedValue = encodeURIComponent(formField[1]);
+        formBody.push(encodedKey + "=" + encodedValue);
+      }
+
+      return formBody.join("&");
+    }
+
     function reset() {
       element.classList.remove(MASS_INPUT_INITIALIZED_CLASS);
       massInputForm.removeEventListener('submit', massInputFormSubmitHandler)