From 00289eca09d8815df6d3fc83bfba2ff15c73c1d7 Mon Sep 17 00:00:00 2001
From: Edgar Aroutiounian <edgar.factorial@gmail.com>
Date: Wed, 29 Nov 2017 12:07:49 -0800
Subject: [PATCH] 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 https://github.com/facebook/react-native/issues/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 https://github.com/facebook/react-native/pull/15481

Differential Revision: D6438016

Pulled By: hramos

fbshipit-source-id: 47512140f62f458c14ad2ade2b358846e168c964
---
 Libraries/CameraRoll/CameraRoll.js          |  4 ++++
 Libraries/CameraRoll/RCTCameraRollManager.m | 22 +++++++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/Libraries/CameraRoll/CameraRoll.js b/Libraries/CameraRoll/CameraRoll.js
index 596aec7e3b2f4b..eccad7d5265a92 100644
--- a/Libraries/CameraRoll/CameraRoll.js
+++ b/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.
    *
diff --git a/Libraries/CameraRoll/RCTCameraRollManager.m b/Libraries/CameraRoll/RCTCameraRollManager.m
index 64cf734b1ac3cd..4b6a78bde2c21b 100644
--- a/Libraries/CameraRoll/RCTCameraRollManager.m
+++ b/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