Protect events (#444)

ios/RCTVideo.m

@@ -184,7 +184,7 @@ static NSString *const playbackRate = @"rate";
    CMTime currentTime = _player.currentTime;
    const Float64 duration = CMTimeGetSeconds(playerDuration);
    const Float64 currentTimeSecs = CMTimeGetSeconds(currentTime);
-   if( currentTimeSecs >= 0) {
+   if( currentTimeSecs >= 0 && self.onVideoProgress) {
       self.onVideoProgress(@{
                              @"currentTime": [NSNumber numberWithFloat:CMTimeGetSeconds(currentTime)],
                              @"playableDuration": [self calculatePlayableDuration],
@@ -277,12 +277,15 @@ static NSString *const playbackRate = @"rate";
 
   dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
     //Perform on next run loop, otherwise onVideoLoadStart is nil
+      if(self.onVideoLoadStart) {
           self.onVideoLoadStart(@{@"src": @{
                                           @"uri": [source objectForKey:@"uri"],
                                           @"type": [source objectForKey:@"type"],
                                           @"isNetwork": [NSNumber numberWithBool:(bool)[source objectForKey:@"isNetwork"]]},
                                   @"target": self.reactTag
                                   });
+      }
+
   });
 }
 
@@ -342,6 +345,7 @@ static NSString *const playbackRate = @"rate";
             orientation = @"portrait";
         }
           
+      if(self.onVideoLoad) {
           self.onVideoLoad(@{@"duration": [NSNumber numberWithFloat:duration],
                              @"currentTime": [NSNumber numberWithFloat:CMTimeGetSeconds(_playerItem.currentTime)],
                              @"canPlayReverse": [NSNumber numberWithBool:_playerItem.canPlayReverse],
@@ -356,10 +360,12 @@ static NSString *const playbackRate = @"rate";
                                      @"orientation": orientation
                                      },
                              @"target": self.reactTag});
+      }
+
 
         [self attachListeners];
         [self applyModifiers];
-      } else if(_playerItem.status == AVPlayerItemStatusFailed) {
+      } else if(_playerItem.status == AVPlayerItemStatusFailed && self.onVideoError) {
         self.onVideoError(@{@"error": @{@"code": [NSNumber numberWithInteger: _playerItem.error.code],
                                         @"domain": _playerItem.error.domain},
                                         @"target": self.reactTag});
@@ -377,17 +383,21 @@ static NSString *const playbackRate = @"rate";
     }
    } else if (object == _playerLayer) {
       if([keyPath isEqualToString:readyForDisplayKeyPath] && [change objectForKey:NSKeyValueChangeNewKey]) {
-        if([change objectForKey:NSKeyValueChangeNewKey]) {
+        if([change objectForKey:NSKeyValueChangeNewKey] && self.onReadyForDisplay) {
           self.onReadyForDisplay(@{@"target": self.reactTag});
         }
     }
   } else if (object == _player) {
       if([keyPath isEqualToString:playbackRate]) {
+          if(self.onPlaybackRateChange) {
               self.onPlaybackRateChange(@{@"playbackRate": [NSNumber numberWithFloat:_player.rate],
                                           @"target": self.reactTag});
+          }
           if(_playbackStalled && _player.rate > 0) {
+              if(self.onPlaybackResume) {
                   self.onPlaybackResume(@{@"playbackRate": [NSNumber numberWithFloat:_player.rate],
                                           @"target": self.reactTag});
+              }
               _playbackStalled = NO;
           }
       }
@@ -411,13 +421,17 @@ static NSString *const playbackRate = @"rate";
 
 - (void)playbackStalled:(NSNotification *)notification
 {
+  if(self.onPlaybackStalled) {
     self.onPlaybackStalled(@{@"target": self.reactTag});
+  }
   _playbackStalled = YES;
 }
 
 - (void)playerItemDidReachEnd:(NSNotification *)notification
 {
+  if(self.onVideoEnd) {
       self.onVideoEnd(@{@"target": self.reactTag});
+  }
 
   if (_repeat) {
     AVPlayerItem *item = [notification object];
@@ -489,9 +503,11 @@ static NSString *const playbackRate = @"rate";
 
     if (CMTimeCompare(current, cmSeekTime) != 0) {
       [_player seekToTime:cmSeekTime toleranceBefore:tolerance toleranceAfter:tolerance completionHandler:^(BOOL finished) {
+        if(self.onVideoSeek) {
             self.onVideoSeek(@{@"currentTime": [NSNumber numberWithFloat:CMTimeGetSeconds(item.currentTime)],
                                @"seekTime": [NSNumber numberWithFloat:seekTime],
                                @"target": self.reactTag});
+        }
       }];
 
       _pendingSeek = false;
@@ -573,11 +589,15 @@ static NSString *const playbackRate = @"rate";
         if( viewController )
         {
             _presentingViewController = viewController;
+            if(self.onVideoFullscreenPlayerWillPresent) {
                 self.onVideoFullscreenPlayerWillPresent(@{@"target": self.reactTag});
+            }
             [viewController presentViewController:_playerViewController animated:true completion:^{
                 _playerViewController.showsPlaybackControls = YES;
                 _fullscreenPlayerPresented = fullscreen;
+                if(self.onVideoFullscreenPlayerDidPresent) {
                     self.onVideoFullscreenPlayerDidPresent(@{@"target": self.reactTag});
+                }
             }];
         }
     }
@@ -655,7 +675,7 @@ static NSString *const playbackRate = @"rate";
 
 - (void)videoPlayerViewControllerWillDismiss:(AVPlayerViewController *)playerViewController
 {
-    if (_playerViewController == playerViewController && _fullscreenPlayerPresented)
+    if (_playerViewController == playerViewController && _fullscreenPlayerPresented && self.onVideoFullscreenPlayerWillDismiss)
     {
         self.onVideoFullscreenPlayerWillDismiss(@{@"target": self.reactTag});
     }
@@ -668,8 +688,10 @@ static NSString *const playbackRate = @"rate";
         _fullscreenPlayerPresented = false;
         _presentingViewController = nil;
         [self applyModifiers];
+        if(self.onVideoFullscreenPlayerDidDismiss) {
             self.onVideoFullscreenPlayerDidDismiss(@{@"target": self.reactTag});
         }
+    }
 }
 
 #pragma mark - React View Management