add notify methods to global STREET object

- add succesMessage and errorMessage to notify object
- replace legacy notify methods calls to new ones

src/components/notify.js

@@ -34,6 +34,17 @@ AFRAME.registerComponent('notify', {
       dismissible: this.data.dismissible
     });
     this.types = this.notify.options.types.map(messType => messType.type);
+
+    // add notify methods to STREET global objects
+    if (STREET) {
+      STREET.notify = {};
+      STREET.notify.successMessage = (messageText) => {
+        this.message(messageText, 'success');
+      }
+      STREET.notify.errorMessage = (messageText)=> {
+        this.message(messageText, 'error');
+      }
+    }
   },
   message: function (messageText, messageType = 'info') {
     if (messageText && this.types.includes(messageType)) {

src/json-utils.js

@@ -561,21 +561,15 @@ AFRAME.registerComponent('set-loader-from-hash', {
         console.error(
           '[set-loader-from-hash] Error trying to load scene: Resource not found.'
         );
-        AFRAME.scenes[0].components['notify'].message(
-          'Error trying to load scene: Resource not found.',
-          'error'
-        );
+        STREET.notify.errorMessage('Error trying to load scene: Resource not found.');
       }
     };
     request.onerror = function () {
       // There was a connection error of some sort
       console.error(
         'Loading Error: There was a connection error during JSON loading'
       );
-      AFRAME.scenes[0].components['notify'].message(
-        'Could not fetch scene.',
-        'error'
-      );
+      STREET.notify.errorMessage('Could not fetch scene.');
     };
     request.send();
   }
@@ -646,10 +640,7 @@ function createElementsFromJSON(streetJSON) {
   }
 
   createEntities(streetObject.data, streetContainerEl);
-  AFRAME.scenes[0].components['notify'].message(
-    'Scene loaded from JSON',
-    'success'
-  );
+  STREET.notify.successMessage('Scene loaded from JSON');
 }
 
 // viewer widget click to paste json string of 3dstreet scene