AJAX function to update a model endpoint

- Grabs the CSRF token cookie (required!)
- If final mode, adds '_is_final' parameter to request

InvenTree/static/script/inventree/api.js

@@ -1,7 +1,26 @@
+var jQuery = window.$;
+
+// using jQuery
+function getCookie(name) {
+    var cookieValue = null;
+    if (document.cookie && document.cookie != '') {
+        var cookies = document.cookie.split(';');
+        for (var i = 0; i < cookies.length; i++) {
+            var cookie = jQuery.trim(cookies[i]);
+            // Does this cookie string begin with the name we want?
+            if (cookie.substring(0, name.length + 1) == (name + '=')) {
+                cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
+                break;
+            }
+        }
+    }
+    return cookieValue;
+}
+
 function inventreeGet(url, filters={}) {
     $.ajax({
         url: url,
-        type: 'get',
+        type: 'GET',
         data: filters,
         dataType: 'json',
         success: function(response) {
@@ -16,6 +35,36 @@ function inventreeGet(url, filters={}) {
     })
 }
 
+function inventreeUpdate(url, data, final=false) {
+    if (final) {
+        data["_is_final"] = true;
+    }
+
+    // Middleware token required for data update
+    //var csrftoken = jQuery("[name=csrfmiddlewaretoken]").val();
+    var csrftoken = getCookie('csrftoken');
+
+    $.ajax({
+        beforeSend: function(xhr, settings) {
+            xhr.setRequestHeader('X-CSRFToken', csrftoken);
+        },
+        url: url,
+        type: 'put',
+        data: data,
+        dataType: 'json',
+        success: function(response, status) {
+            response['_status_code'] = status;
+            console.log('UPDATE object to ' + url + ' - result = ' + status);
+            return response;
+        },
+        error: function(xhr, ajaxOptions, thrownError) {
+            console.error('Error on UPDATE to ' + url);
+            console.error(thrownError);
+            return {error: thrownError};
+        }
+    })
+}
+
 // Return list of parts with optional filters
 function getParts(filters={}) {
     return inventreeGet('/api/part/', filters);