react-native/Libraries/CameraRoll/RCTCameraRollManager.m

210 lines
7.0 KiB
Objective-C

/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
#import "RCTCameraRollManager.h"
#import <CoreLocation/CoreLocation.h>
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import "RCTAssetsLibraryRequestHandler.h"
#import "RCTBridge.h"
#import "RCTConvert.h"
#import "RCTImageLoader.h"
#import "RCTLog.h"
#import "RCTUtils.h"
@implementation RCTConvert (ALAssetGroup)
RCT_ENUM_CONVERTER(ALAssetsGroupType, (@{
// New values
@"album": @(ALAssetsGroupAlbum),
@"all": @(ALAssetsGroupAll),
@"event": @(ALAssetsGroupEvent),
@"faces": @(ALAssetsGroupFaces),
@"library": @(ALAssetsGroupLibrary),
@"photo-stream": @(ALAssetsGroupPhotoStream),
@"saved-photos": @(ALAssetsGroupSavedPhotos),
// Legacy values
@"Album": @(ALAssetsGroupAlbum),
@"All": @(ALAssetsGroupAll),
@"Event": @(ALAssetsGroupEvent),
@"Faces": @(ALAssetsGroupFaces),
@"Library": @(ALAssetsGroupLibrary),
@"PhotoStream": @(ALAssetsGroupPhotoStream),
@"SavedPhotos": @(ALAssetsGroupSavedPhotos),
}), ALAssetsGroupSavedPhotos, integerValue)
+ (ALAssetsFilter *)ALAssetsFilter:(id)json
{
static NSDictionary<NSString *, ALAssetsFilter *> *options;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
options = @{
// New values
@"photos": [ALAssetsFilter allPhotos],
@"videos": [ALAssetsFilter allVideos],
@"all": [ALAssetsFilter allAssets],
// Legacy values
@"Photos": [ALAssetsFilter allPhotos],
@"Videos": [ALAssetsFilter allVideos],
@"All": [ALAssetsFilter allAssets],
};
});
ALAssetsFilter *filter = options[json ?: @"photos"];
if (!filter) {
RCTLogError(@"Invalid filter option: '%@'. Expected one of 'photos',"
"'videos' or 'all'.", json);
}
return filter ?: [ALAssetsFilter allPhotos];
}
@end
@implementation RCTCameraRollManager
RCT_EXPORT_MODULE()
@synthesize bridge = _bridge;
NSString *const RCTErrorUnableToLoad = @"E_UNABLE_TO_LOAD";
NSString *const RCTErrorUnableToSave = @"E_UNABLE_TO_SAVE";
RCT_EXPORT_METHOD(saveImageWithTag:(NSString *)imageTag
resolve:(RCTPromiseResolveBlock)resolve
reject:(RCTPromiseRejectBlock)reject)
{
[_bridge.imageLoader loadImageWithTag:imageTag callback:^(NSError *loadError, UIImage *loadedImage) {
if (loadError) {
reject(RCTErrorUnableToLoad, nil, loadError);
return;
}
// It's unclear if writeImageToSavedPhotosAlbum is thread-safe
dispatch_async(dispatch_get_main_queue(), ^{
[_bridge.assetsLibrary writeImageToSavedPhotosAlbum:loadedImage.CGImage metadata:nil completionBlock:^(NSURL *assetURL, NSError *saveError) {
if (saveError) {
RCTLogWarn(@"Error saving cropped image: %@", saveError);
reject(RCTErrorUnableToSave, nil, saveError);
} else {
resolve(assetURL.absoluteString);
}
}];
});
}];
}
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)
{
NSUInteger first = [RCTConvert NSInteger:params[@"first"]];
NSString *afterCursor = [RCTConvert NSString:params[@"after"]];
NSString *groupName = [RCTConvert NSString:params[@"groupName"]];
ALAssetsFilter *assetType = [RCTConvert ALAssetsFilter:params[@"assetType"]];
ALAssetsGroupType groupTypes = [RCTConvert ALAssetsGroupType:params[@"groupTypes"]];
BOOL __block foundAfter = NO;
BOOL __block hasNextPage = NO;
BOOL __block resolvedPromise = NO;
NSMutableArray<NSDictionary<NSString *, id> *> *assets = [NSMutableArray new];
[_bridge.assetsLibrary enumerateGroupsWithTypes:groupTypes usingBlock:^(ALAssetsGroup *group, BOOL *stopGroups) {
if (group && (groupName == nil || [groupName isEqualToString:[group valueForProperty:ALAssetsGroupPropertyName]])) {
[group setAssetsFilter:assetType];
[group enumerateAssetsWithOptions:NSEnumerationReverse usingBlock:^(ALAsset *result, NSUInteger index, BOOL *stopAssets) {
if (result) {
NSString *uri = ((NSURL *)[result valueForProperty:ALAssetPropertyAssetURL]).absoluteString;
if (afterCursor && !foundAfter) {
if ([afterCursor isEqualToString:uri]) {
foundAfter = YES;
}
return; // Skip until we get to the first one
}
if (first == assets.count) {
*stopAssets = YES;
*stopGroups = YES;
hasNextPage = YES;
RCTAssert(resolvedPromise == NO, @"Resolved the promise before we finished processing the results.");
RCTResolvePromise(resolve, assets, hasNextPage);
resolvedPromise = YES;
return;
}
CGSize dimensions = [result defaultRepresentation].dimensions;
CLLocation *loc = [result valueForProperty:ALAssetPropertyLocation];
NSDate *date = [result valueForProperty:ALAssetPropertyDate];
[assets addObject:@{
@"node": @{
@"type": [result valueForProperty:ALAssetPropertyType],
@"group_name": [group valueForProperty:ALAssetsGroupPropertyName],
@"image": @{
@"uri": uri,
@"height": @(dimensions.height),
@"width": @(dimensions.width),
@"isStored": @YES,
},
@"timestamp": @(date.timeIntervalSince1970),
@"location": loc ? @{
@"latitude": @(loc.coordinate.latitude),
@"longitude": @(loc.coordinate.longitude),
@"altitude": @(loc.altitude),
@"heading": @(loc.course),
@"speed": @(loc.speed),
} : @{},
}
}];
}
}];
} else {
// Sometimes the enumeration continues even if we set stop above, so we guard against resolving the promise
// multiple times here.
if (!resolvedPromise) {
RCTResolvePromise(resolve, assets, hasNextPage);
resolvedPromise = YES;
}
}
} failureBlock:^(NSError *error) {
if (error.code != ALAssetsLibraryAccessUserDeniedError) {
RCTLogError(@"Failure while iterating through asset groups %@", error);
}
reject(RCTErrorUnableToLoad, nil, error);
}];
}
@end