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react-native-cameraroll/ios/RNCCameraRollManager.m

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/**
* 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/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 correspondence in PHAssetCollectionSubtype
@"savedphotos": @(PHAssetCollectionSubtypeAny), // This was ALAssetsGroupSavedPhotos, seems to have no direct correspondence in PHAssetCollectionSubtype
}), PHAssetCollectionSubtypeAny, integerValue)
@end
@implementation RCTConvert (PHFetchOptions)
+ (PHFetchOptions *)PHFetchOptionsFromMediaType:(NSString *)mediaType
fromTime:(NSUInteger)fromTime
toTime:(NSUInteger)toTime
{
// This is not exhaustive in terms of supported media type predicates; more can be added in the future
NSString *const lowercase = [mediaType lowercaseString];
NSMutableArray *format = [NSMutableArray new];
NSMutableArray *arguments = [NSMutableArray new];
if ([lowercase isEqualToString:@"photos"]) {
[format addObject:@"mediaType = %d"];
[arguments addObject:@(PHAssetMediaTypeImage)];
} else if ([lowercase isEqualToString:@"videos"]) {
[format addObject:@"mediaType = %d"];
[arguments addObject:@(PHAssetMediaTypeVideo)];
} else {
if (![lowercase isEqualToString:@"all"]) {
RCTLogError(@"Invalid filter option: '%@'. Expected one of 'photos',"
"'videos' or 'all'.", mediaType);
}
}
if (fromTime > 0) {
NSDate* fromDate = [NSDate dateWithTimeIntervalSince1970:fromTime/1000];
[format addObject:@"creationDate > %@"];
[arguments addObject:fromDate];
}
if (toTime > 0) {
NSDate* toDate = [NSDate dateWithTimeIntervalSince1970:toTime/1000];
[format addObject:@"creationDate <= %@"];
[arguments addObject:toDate];
}
// This case includes the "all" mediatype
PHFetchOptions *const options = [PHFetchOptions new];
if ([format count] > 0) {
options.predicate = [NSPredicate predicateWithFormat:[format componentsJoinedByString:@" AND "] argumentArray:arguments];
}
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
options:(NSDictionary *)options
resolve:(RCTPromiseResolveBlock)resolve
reject:(RCTPromiseRejectBlock)reject)
{
// 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 PHFetchResult *photosAsset;
__block PHAssetCollection *collection;
__block PHObjectPlaceholder *placeholder;
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 *assetRequest ;
if ([options[@"type"] isEqualToString:@"video"]) {
assetRequest = [PHAssetChangeRequest creationRequestForAssetFromVideoAtFileURL:inputURI];
} else {
NSData *data = [NSData dataWithContentsOfURL:inputURI];
UIImage *image = [UIImage imageWithData:data];
assetRequest = [PHAssetChangeRequest creationRequestForAssetFromImage:image];
}
placeholder = [assetRequest placeholderForCreatedAsset];
if (![options[@"album"] isEqualToString:@""]) {
photosAsset = [PHAsset fetchAssetsInAssetCollection:collection options:nil];
PHAssetCollectionChangeRequest *albumChangeRequest = [PHAssetCollectionChangeRequest changeRequestForAssetCollection:collection assets:photosAsset];
[albumChangeRequest addAssets:@[placeholder]];
}
} completionHandler:^(BOOL success, NSError *error) {
if (success) {
NSString *uri = [NSString stringWithFormat:@"ph://%@", [placeholder localIdentifier]];
resolve(uri);
} else {
reject(kErrorUnableToSave, nil, error);
}
}];
};
void (^saveWithOptions)(void) = ^void() {
if (![options[@"album"] isEqualToString:@""]) {
PHFetchOptions *fetchOptions = [[PHFetchOptions alloc] init];
fetchOptions.predicate = [NSPredicate predicateWithFormat:@"title = %@", options[@"album"] ];
collection = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeAlbum
subtype:PHAssetCollectionSubtypeAny
options:fetchOptions].firstObject;
// Create the album
if (!collection) {
[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
PHAssetCollectionChangeRequest *createAlbum = [PHAssetCollectionChangeRequest creationRequestForAssetCollectionWithTitle:options[@"album"]];
placeholder = [createAlbum placeholderForCreatedAssetCollection];
} completionHandler:^(BOOL success, NSError *error) {
if (success) {
PHFetchResult *collectionFetchResult = [PHAssetCollection fetchAssetCollectionsWithLocalIdentifiers:@[placeholder.localIdentifier]
options:nil];
collection = collectionFetchResult.firstObject;
saveBlock();
} else {
reject(kErrorUnableToSave, nil, error);
}
}];
} else {
saveBlock();
}
} else {
saveBlock();
}
};
void (^loadBlock)(void) = ^void() {
inputURI = request.URL;
saveWithOptions();
};
requestPhotoLibraryAccess(reject, loadBlock);
}
RCT_EXPORT_METHOD(getAlbums:(NSDictionary *)params
resolve:(RCTPromiseResolveBlock)resolve
reject:(RCTPromiseRejectBlock)reject)
{
NSString *const mediaType = [params objectForKey:@"assetType"] ? [RCTConvert NSString:params[@"assetType"]] : @"All";
PHFetchOptions* options = [[PHFetchOptions alloc] init];
PHFetchResult<PHAssetCollection *> *const assetCollectionFetchResult = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeAlbum subtype:PHAssetCollectionSubtypeAny options:options];
NSMutableArray * result = [NSMutableArray new];
[assetCollectionFetchResult enumerateObjectsUsingBlock:^(PHAssetCollection * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
PHFetchOptions *const assetFetchOptions = [RCTConvert PHFetchOptionsFromMediaType:mediaType fromTime:0 toTime:0];
// Enumerate assets within the collection
PHFetchResult<PHAsset *> *const assetsFetchResult = [PHAsset fetchAssetsInAssetCollection:obj options:assetFetchOptions];
if (assetsFetchResult.count > 0) {
[result addObject:@{
@"title": [obj localizedTitle],
@"count": @(assetsFetchResult.count)
}];
}
}];
resolve(result);
}
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"]];
NSUInteger const fromTime = [RCTConvert NSInteger:params[@"fromTime"]];
NSUInteger const toTime = [RCTConvert NSInteger:params[@"toTime"]];
NSArray<NSString *> *const mimeTypes = [RCTConvert NSStringArray:params[@"mimeTypes"]];
NSArray<NSString *> *const include = [RCTConvert NSStringArray:params[@"include"]];
BOOL __block includeFilename = [include indexOfObject:@"filename"] != NSNotFound;
BOOL __block includeFileSize = [include indexOfObject:@"fileSize"] != NSNotFound;
BOOL __block includeLocation = [include indexOfObject:@"location"] != NSNotFound;
BOOL __block includeImageSize = [include indexOfObject:@"imageSize"] != NSNotFound;
BOOL __block includePlayableDuration = [include indexOfObject:@"playableDuration"] != NSNotFound;
// 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 fromTime:fromTime toTime:toTime];
// We can directly set the limit if we guarantee every image fetched will be
// added to the output array within the `collectAsset` block
BOOL collectAssetMayOmitAsset = !!afterCursor || [mimeTypes count] > 0;
if (!collectAssetMayOmitAsset) {
// We set the fetchLimit to first + 1 so that `hasNextPage` will be set
// correctly:
// - If the user set `first: 10` and there are 11 photos, `hasNextPage`
// will be set to true below inside of `collectAsset`
// - If the user set `first: 10` and there are 10 photos, `hasNextPage`
// will not be set, as expected
assetFetchOptions.fetchLimit = first + 1;
}
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:@"localizedTitle = %@", groupName];
}
BOOL __block stopCollections_;
NSString __block *currentCollectionName;
requestPhotoLibraryAccess(reject, ^{
void (^collectAsset)(PHAsset*, NSUInteger, BOOL*) = ^(PHAsset * _Nonnull asset, NSUInteger assetIdx, BOOL * _Nonnull stopAssets) {
NSString *const uri = [NSString stringWithFormat:@"ph://%@", [asset localIdentifier]];
NSString *_Nullable originalFilename = NULL;
PHAssetResource *_Nullable resource = NULL;
NSNumber* fileSize = [NSNumber numberWithInt:0];
if (includeFilename || includeFileSize || [mimeTypes count] > 0) {
// Get underlying resources of an asset - this includes files as well as details about edited PHAssets
// This is required for the filename and mimeType filtering
NSArray<PHAssetResource *> *const assetResources = [PHAssetResource assetResourcesForAsset:asset];
resource = [assetResources firstObject];
originalFilename = resource.originalFilename;
fileSize = [resource valueForKey:@"fileSize"];
}
// WARNING: If you add any code to `collectAsset` that may skip adding an
// asset to the `assets` output array, you should do it inside this
// block and ensure the logic for `collectAssetMayOmitAsset` above is
// updated
if (collectAssetMayOmitAsset) {
if (afterCursor && !foundAfter) {
if ([afterCursor isEqualToString:uri]) {
foundAfter = YES;
}
return; // skip until we get to the first one
}
if ([mimeTypes count] > 0 && resource) {
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;
[assets addObject:@{
@"node": @{
@"type": assetMediaTypeLabel, // TODO: switch to mimeType?
@"group_name": currentCollectionName,
@"image": @{
@"uri": uri,
@"filename": (includeFilename && originalFilename ? originalFilename : [NSNull null]),
@"height": (includeImageSize ? @([asset pixelHeight]) : [NSNull null]),
@"width": (includeImageSize ? @([asset pixelWidth]) : [NSNull null]),
@"fileSize": (includeFileSize ? fileSize : [NSNull null]),
@"playableDuration": (includePlayableDuration && asset.mediaType != PHAssetMediaTypeImage
? @([asset duration]) // fractional seconds
: [NSNull null])
},
@"timestamp": @(asset.creationDate.timeIntervalSince1970),
@"location": (includeLocation && loc ? @{
@"latitude": @(loc.coordinate.latitude),
@"longitude": @(loc.coordinate.longitude),
@"altitude": @(loc.altitude),
@"heading": @(loc.course),
@"speed": @(loc.speed), // speed in m/s
} : [NSNull null])
}
}];
};
if ([groupTypes isEqualToString:@"all"]) {
PHFetchResult <PHAsset *> *const assetFetchResult = [PHAsset fetchAssetsWithOptions: assetFetchOptions];
currentCollectionName = @"All Photos";
[assetFetchResult enumerateObjectsUsingBlock:collectAsset];
} else {
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];
currentCollectionName = [assetCollection localizedTitle];
[assetsFetchResult enumerateObjectsUsingBlock:collectAsset];
*stopCollections = stopCollections_;
}];
}
// 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)
{
NSMutableArray *convertedAssets = [NSMutableArray array];
for (NSString *asset in assets) {
[convertedAssets addObject: [asset stringByReplacingOccurrencesOfString:@"ph://" withString:@""]];
}
[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
PHFetchResult<PHAsset *> *fetched =
[PHAsset fetchAssetsWithLocalIdentifiers:convertedAssets 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
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