reuse existing custom profile file in editing session by passing id in URL

js/control/RoutingOptions.js

@@ -52,6 +52,17 @@ BR.RoutingOptions = BR.Control.extend({
         }
     },
 
+    getCustomProfile: function() {
+        var select = L.DomUtil.get('profile'),
+            option = select.options[0],
+            profile = null;
+
+        if (!option.disabled) {
+            profile = option.value;
+        }
+        return profile;
+    },
+
     _getChangeHandler: function() {
         return L.bind(function(evt) {
             this.fire('update', {options: this.getOptions()});

js/index.js

@@ -114,7 +114,8 @@
         elevation = new BR.Elevation();
         profile = new BR.Profile();
         profile.on('update', function(evt) {
-            router.uploadProfile(evt.profileText, function(profile) {
+            var profileId = routingOptions.getCustomProfile();
+            router.uploadProfile(profileId, evt.profileText, function(profile) {
                 routingOptions.setCustomProfile(profile);
             });
         });

js/router/BRouter.js

@@ -92,9 +92,16 @@ L.BRouter = L.Class.extend({
         return this.getRoute([l1, l2], cb);
     },
 
-    uploadProfile: function(profileText, cb) {
-        var xhr = new XMLHttpRequest();
-        xhr.open('POST', L.BRouter.URL_PROFILE_UPLOAD, true);
+    uploadProfile: function(profileId, profileText, cb) {
+        var url = L.BRouter.URL_PROFILE_UPLOAD;
+            xhr = new XMLHttpRequest();
+
+        // reuse existing profile file
+        if (profileId) {
+            url += '/' + profileId;
+        }
+
+        xhr.open('POST', url, true);
         xhr.onload = L.bind(this._handleProfileResponse, this, xhr, cb);
 
         // send profile text only, as text/plain;charset=UTF-8