Implement deletion of asset-library files

Summary:
WIP: Starting point insofar as I'm not sure if there should be an Android equivalent.

My application needs me to delete photos from the photos in iOS.

I have tested this in my application and it works, have a screenshot from iOS asking as well and it does successfully delete the photos from the global Photos app.

Related to facebook#15253, it kind of continues using the deprecated assets-library framework, but that does need (and will be an bigger and bigger issue coming up) of assets-library URLs being used.

I also assume RN prefers error handling at the JS level? Are the URLs starting with `asset-library`, etc.
Closes facebook#15481

Differential Revision: D6438016

Pulled By: hramos

fbshipit-source-id: 47512140f62f458c14ad2ade2b358846e168c964

Libraries/CameraRoll/CameraRoll.js

@@ -133,6 +133,10 @@ class CameraRoll {
  return this.saveToCameraRoll(tag, 'photo');
  }
 
+ static deletePhotos(photos: Array<string>) {
+ return RCTCameraRollManager.deletePhotos(photos);
+ }
+
  /**
  * Saves the photo or video to the camera roll / gallery.
  *

Libraries/CameraRoll/RCTCameraRollManager.m

@@ -12,6 +12,7 @@
 #import <CoreLocation/CoreLocation.h>
 #import <Foundation/Foundation.h>
 #import <UIKit/UIKit.h>
+#import <Photos/Photos.h>
 
 #import <React/RCTBridge.h>
 #import <React/RCTConvert.h>
@@ -234,6 +235,27 @@ static void RCTResolvePromise(RCTPromiseResolveBlock resolve,
  }];
 }
 
+RCT_EXPORT_METHOD(deletePhotos:(NSArray<NSString *>*)assets
+ resolve:(RCTPromiseResolveBlock)resolve
+ reject:(RCTPromiseRejectBlock)reject)
+{
+ NSArray<NSURL *> *assets_ = [RCTConvert NSURLArray:assets];
+ [[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
+ PHFetchResult<PHAsset *> *fetched =
+ [PHAsset fetchAssetsWithALAssetURLs:assets_ options:nil];
+ [PHAssetChangeRequest deleteAssets:fetched];
+ }
+ completionHandler:^(BOOL success, NSError *error) {
+ if (success == YES) {
+ resolve(@(success));
+ }
+ else {
+ reject(@"Couldn't delete", @"Couldn't delete assets", error);
+ }
+ }
+ ];
+}
+
 static void checkPhotoLibraryConfig()
 {
 #if RCT_DEV