fix: Ensure reject on loadImage failed (fix #116) (#128)

* fix: Check oImage existence before use fixes #116

* fix: Add rejectMessage for 'loadingImageFailed'

* chore: Add missing message and order messages

src/js/component/imageLoader.js

@@ -72,7 +72,7 @@ class ImageLoader extends Component {
  canvas.setBackgroundImage(img, () => {
  const oImage = canvas.backgroundImage;
 
- if (oImage.getElement()) {
+ if (oImage && oImage.getElement()) {
  resolve(oImage);
  } else {
  reject(rejectMessages.loadingImageFailed);

src/js/consts.js

@@ -119,18 +119,20 @@ module.exports = {
  * @type {Object.<string, string>}
  */
  rejectMessages: {
+ addedObject: 'The object is already added.',
  flip: 'The flipX and flipY setting values are not changed.',
- rotation: 'The current angle is same the old angle.',
- loadImage: 'The background image is empty.',
+ invalidDrawingMode: 'This operation is not supported in the drawing mode.',
+ invalidParameters: 'Invalid parameters.',
  isLock: 'The executing command state is locked.',
- undo: 'The promise of undo command is reject.',
- redo: 'The promise of redo command is reject.',
- invalidDrawingMode: 'This operation is not supported in the drawing mode',
- invalidParameters: 'Invalid parameters',
+ loadImage: 'The background image is empty.',
+ loadingImageFailed: 'Invalid image loaded.',
  noActiveObject: 'There is no active object.',
- unsupportedType: 'Unsupported object type',
  noObject: 'The object is not in canvas.',
- addedObject: 'The object is already added.'
+ redo: 'The promise of redo command is reject.',
+ rotation: 'The current angle is same the old angle.',
+ undo: 'The promise of undo command is reject.',
+ unsupportedOperation: 'Unsupported operation.',
+ unsupportedType: 'Unsupported object type.'
  },
 
  /**