react-native-cameraroll/ios/RNCCameraRollManager.m

349 lines
14 KiB
Objective-C

/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
#import "RNCCameraRollManager.h"
#import <CoreLocation/CoreLocation.h>
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import <Photos/Photos.h>
#import <dlfcn.h>
#import <objc/runtime.h>
#import <MobileCoreServices/UTType.h>
#import <React/RCTBridge.h>
#import <React/RCTConvert.h>
#import <React/RCTImageLoader.h>
#import <React/RCTLog.h>
#import <React/RCTUtils.h>
#import "RNCAssetsLibraryRequestHandler.h"
@implementation RCTConvert (PHAssetCollectionSubtype)
RCT_ENUM_CONVERTER(PHAssetCollectionSubtype, (@{
@"album": @(PHAssetCollectionSubtypeAny),
@"all": @(PHAssetCollectionSubtypeSmartAlbumUserLibrary),
@"event": @(PHAssetCollectionSubtypeAlbumSyncedEvent),
@"faces": @(PHAssetCollectionSubtypeAlbumSyncedFaces),
@"library": @(PHAssetCollectionSubtypeSmartAlbumUserLibrary),
@"photo-stream": @(PHAssetCollectionSubtypeAlbumMyPhotoStream), // incorrect, but legacy
@"photostream": @(PHAssetCollectionSubtypeAlbumMyPhotoStream),
@"saved-photos": @(PHAssetCollectionSubtypeAny), // incorrect, but legacy
@"savedphotos": @(PHAssetCollectionSubtypeAny), // This was ALAssetsGroupSavedPhotos, seems to have no direct correspondence in PHAssetCollectionSubtype
}), PHAssetCollectionSubtypeAny, integerValue)
@end
@implementation RCTConvert (PHFetchOptions)
+ (PHFetchOptions *)PHFetchOptionsFromMediaType:(NSString *)mediaType
{
// This is not exhaustive in terms of supported media type predicates; more can be added in the future
NSString *const lowercase = [mediaType lowercaseString];
if ([lowercase isEqualToString:@"photos"]) {
PHFetchOptions *const options = [PHFetchOptions new];
options.predicate = [NSPredicate predicateWithFormat:@"mediaType = %d", PHAssetMediaTypeImage];
return options;
} else if ([lowercase isEqualToString:@"videos"]) {
PHFetchOptions *const options = [PHFetchOptions new];
options.predicate = [NSPredicate predicateWithFormat:@"mediaType = %d", PHAssetMediaTypeVideo];
return options;
} else {
if (![lowercase isEqualToString:@"all"]) {
RCTLogError(@"Invalid filter option: '%@'. Expected one of 'photos',"
"'videos' or 'all'.", mediaType);
}
// This case includes the "all" mediatype
PHFetchOptions *const options = [PHFetchOptions new];
return options;
}
}
@end
@implementation RNCCameraRollManager
RCT_EXPORT_MODULE(RNCCameraRoll)
@synthesize bridge = _bridge;
static NSString *const kErrorUnableToSave = @"E_UNABLE_TO_SAVE";
static NSString *const kErrorUnableToLoad = @"E_UNABLE_TO_LOAD";
static NSString *const kErrorAuthRestricted = @"E_PHOTO_LIBRARY_AUTH_RESTRICTED";
static NSString *const kErrorAuthDenied = @"E_PHOTO_LIBRARY_AUTH_DENIED";
typedef void (^PhotosAuthorizedBlock)(void);
static void requestPhotoLibraryAccess(RCTPromiseRejectBlock reject, PhotosAuthorizedBlock authorizedBlock) {
PHAuthorizationStatus authStatus = [PHPhotoLibrary authorizationStatus];
if (authStatus == PHAuthorizationStatusRestricted) {
reject(kErrorAuthRestricted, @"Access to photo library is restricted", nil);
} else if (authStatus == PHAuthorizationStatusAuthorized) {
authorizedBlock();
} else if (authStatus == PHAuthorizationStatusNotDetermined) {
[PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {
requestPhotoLibraryAccess(reject, authorizedBlock);
}];
} else {
reject(kErrorAuthDenied, @"Access to photo library was denied", nil);
}
}
RCT_EXPORT_METHOD(saveToCameraRoll:(NSURLRequest *)request
type:(NSString *)type
resolve:(RCTPromiseResolveBlock)resolve
reject:(RCTPromiseRejectBlock)reject)
{
__block PHObjectPlaceholder *placeholder;
// We load images and videos differently.
// Images have many custom loaders which can load images from ALAssetsLibrary URLs, PHPhotoLibrary
// URLs, `data:` URIs, etc. Video URLs are passed directly through for now; it may be nice to support
// more ways of loading videos in the future.
__block NSURL *inputURI = nil;
__block UIImage *inputImage = nil;
void (^saveBlock)(void) = ^void() {
// performChanges and the completionHandler are called on
// arbitrary threads, not the main thread - this is safe
// for now since all JS is queued and executed on a single thread.
// We should reevaluate this if that assumption changes.
[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
PHAssetChangeRequest *changeRequest;
// Defaults to "photo". `type` is an optional param.
if ([type isEqualToString:@"video"]) {
changeRequest = [PHAssetChangeRequest creationRequestForAssetFromVideoAtFileURL:inputURI];
} else {
changeRequest = [PHAssetChangeRequest creationRequestForAssetFromImage:inputImage];
}
placeholder = [changeRequest placeholderForCreatedAsset];
} completionHandler:^(BOOL success, NSError * _Nullable error) {
if (success) {
NSString *uri = [NSString stringWithFormat:@"ph://%@", [placeholder localIdentifier]];
resolve(uri);
} else {
reject(kErrorUnableToSave, nil, error);
}
}];
};
void (^loadBlock)(void) = ^void() {
if ([type isEqualToString:@"video"]) {
inputURI = request.URL;
saveBlock();
} else {
[self.bridge.imageLoader loadImageWithURLRequest:request callback:^(NSError *error, UIImage *image) {
if (error) {
reject(kErrorUnableToLoad, nil, error);
return;
}
inputImage = image;
saveBlock();
}];
}
};
requestPhotoLibraryAccess(reject, loadBlock);
}
static void RCTResolvePromise(RCTPromiseResolveBlock resolve,
NSArray<NSDictionary<NSString *, id> *> *assets,
BOOL hasNextPage)
{
if (!assets.count) {
resolve(@{
@"edges": assets,
@"page_info": @{
@"has_next_page": @NO,
}
});
return;
}
resolve(@{
@"edges": assets,
@"page_info": @{
@"start_cursor": assets[0][@"node"][@"image"][@"uri"],
@"end_cursor": assets[assets.count - 1][@"node"][@"image"][@"uri"],
@"has_next_page": @(hasNextPage),
}
});
}
RCT_EXPORT_METHOD(getPhotos:(NSDictionary *)params
resolve:(RCTPromiseResolveBlock)resolve
reject:(RCTPromiseRejectBlock)reject)
{
checkPhotoLibraryConfig();
NSUInteger const first = [RCTConvert NSInteger:params[@"first"]];
NSString *const afterCursor = [RCTConvert NSString:params[@"after"]];
NSString *const groupName = [RCTConvert NSString:params[@"groupName"]];
NSString *const groupTypes = [[RCTConvert NSString:params[@"groupTypes"]] lowercaseString];
NSString *const mediaType = [RCTConvert NSString:params[@"assetType"]];
NSArray<NSString *> *const mimeTypes = [RCTConvert NSStringArray:params[@"mimeTypes"]];
// If groupTypes is "all", we want to fetch the SmartAlbum "all photos". Otherwise, all
// other groupTypes values require the "album" collection type.
PHAssetCollectionType const collectionType = ([groupTypes isEqualToString:@"all"]
? PHAssetCollectionTypeSmartAlbum
: PHAssetCollectionTypeAlbum);
PHAssetCollectionSubtype const collectionSubtype = [RCTConvert PHAssetCollectionSubtype:groupTypes];
// Predicate for fetching assets within a collection
PHFetchOptions *const assetFetchOptions = [RCTConvert PHFetchOptionsFromMediaType:mediaType];
assetFetchOptions.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"creationDate" ascending:NO]];
BOOL __block foundAfter = NO;
BOOL __block hasNextPage = NO;
BOOL __block resolvedPromise = NO;
NSMutableArray<NSDictionary<NSString *, id> *> *assets = [NSMutableArray new];
// Filter collection name ("group")
PHFetchOptions *const collectionFetchOptions = [PHFetchOptions new];
collectionFetchOptions.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"endDate" ascending:NO]];
if (groupName != nil) {
collectionFetchOptions.predicate = [NSPredicate predicateWithFormat:[NSString stringWithFormat:@"localizedTitle == '%@'", groupName]];
}
requestPhotoLibraryAccess(reject, ^{
PHFetchResult<PHAssetCollection *> *const assetCollectionFetchResult = [PHAssetCollection fetchAssetCollectionsWithType:collectionType subtype:collectionSubtype options:collectionFetchOptions];
[assetCollectionFetchResult enumerateObjectsUsingBlock:^(PHAssetCollection * _Nonnull assetCollection, NSUInteger collectionIdx, BOOL * _Nonnull stopCollections) {
// Enumerate assets within the collection
PHFetchResult<PHAsset *> *const assetsFetchResult = [PHAsset fetchAssetsInAssetCollection:assetCollection options:assetFetchOptions];
[assetsFetchResult enumerateObjectsUsingBlock:^(PHAsset * _Nonnull asset, NSUInteger assetIdx, BOOL * _Nonnull stopAssets) {
NSString *const uri = [NSString stringWithFormat:@"ph://%@", [asset localIdentifier]];
if (afterCursor && !foundAfter) {
if ([afterCursor isEqualToString:uri]) {
foundAfter = YES;
}
return; // skip until we get to the first one
}
// Get underlying resources of an asset - this includes files as well as details about edited PHAssets
if ([mimeTypes count] > 0) {
NSArray<PHAssetResource *> *const assetResources = [PHAssetResource assetResourcesForAsset:asset];
if (![assetResources firstObject]) {
return;
}
PHAssetResource *const _Nonnull resource = [assetResources firstObject];
CFStringRef const uti = (__bridge CFStringRef _Nonnull)(resource.uniformTypeIdentifier);
NSString *const mimeType = (NSString *)CFBridgingRelease(UTTypeCopyPreferredTagWithClass(uti, kUTTagClassMIMEType));
BOOL __block mimeTypeFound = NO;
[mimeTypes enumerateObjectsUsingBlock:^(NSString * _Nonnull mimeTypeFilter, NSUInteger idx, BOOL * _Nonnull stop) {
if ([mimeType isEqualToString:mimeTypeFilter]) {
mimeTypeFound = YES;
*stop = YES;
}
}];
if (!mimeTypeFound) {
return;
}
}
// If we've accumulated enough results to resolve a single promise
if (first == assets.count) {
*stopAssets = YES;
*stopCollections = YES;
hasNextPage = YES;
RCTAssert(resolvedPromise == NO, @"Resolved the promise before we finished processing the results.");
RCTResolvePromise(resolve, assets, hasNextPage);
resolvedPromise = YES;
return;
}
NSString *const assetMediaTypeLabel = (asset.mediaType == PHAssetMediaTypeVideo
? @"video"
: (asset.mediaType == PHAssetMediaTypeImage
? @"image"
: (asset.mediaType == PHAssetMediaTypeAudio
? @"audio"
: @"unknown")));
CLLocation *const loc = asset.location;
// A note on isStored: in the previous code that used ALAssets, isStored
// was always set to YES, probably because iCloud-synced images were never returned (?).
// To get the "isStored" information and filename, we would need to actually request the
// image data from the image manager. Those operations could get really expensive and
// would definitely utilize the disk too much.
// Thus, this field is actually not reliable.
// Note that Android also does not return the `isStored` field at all.
[assets addObject:@{
@"node": @{
@"type": assetMediaTypeLabel, // TODO: switch to mimeType?
@"group_name": [assetCollection localizedTitle],
@"image": @{
@"uri": uri,
@"height": @([asset pixelHeight]),
@"width": @([asset pixelWidth]),
@"isStored": @YES, // this field doesn't seem to exist on android
@"playableDuration": @([asset duration]) // fractional seconds
},
@"timestamp": @(asset.creationDate.timeIntervalSince1970),
@"location": (loc ? @{
@"latitude": @(loc.coordinate.latitude),
@"longitude": @(loc.coordinate.longitude),
@"altitude": @(loc.altitude),
@"heading": @(loc.course),
@"speed": @(loc.speed), // speed in m/s
} : @{})
}
}];
}];
}];
// If we get this far and haven't resolved the promise yet, we reached the end of the list of photos
if (!resolvedPromise) {
hasNextPage = NO;
RCTResolvePromise(resolve, assets, hasNextPage);
resolvedPromise = YES;
}
});
}
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
if (![[NSBundle mainBundle] objectForInfoDictionaryKey:@"NSPhotoLibraryUsageDescription"]) {
RCTLogError(@"NSPhotoLibraryUsageDescription key must be present in Info.plist to use camera roll.");
}
#endif
}
@end