133 lines
3.8 KiB
Objective-C
133 lines
3.8 KiB
Objective-C
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#import "RCTImageStoreManager.h"
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#import "RCTAssert.h"
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#import "RCTUtils.h"
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@implementation RCTImageStoreManager
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{
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NSMutableDictionary *_store;
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}
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@synthesize methodQueue = _methodQueue;
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RCT_EXPORT_MODULE()
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- (instancetype)init
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{
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if ((self = [super init])) {
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// TODO: need a way to clear this store
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_store = [NSMutableDictionary new];
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}
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return self;
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}
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- (NSString *)storeImage:(UIImage *)image
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{
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RCTAssertMainThread();
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NSString *tag = [NSString stringWithFormat:@"rct-image-store://%tu", _store.count];
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_store[tag] = image;
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return tag;
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}
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- (UIImage *)imageForTag:(NSString *)imageTag
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{
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RCTAssertMainThread();
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return _store[imageTag];
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}
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- (void)storeImage:(UIImage *)image withBlock:(void (^)(NSString *imageTag))block
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{
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dispatch_async(dispatch_get_main_queue(), ^{
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NSString *imageTag = [self storeImage:image];
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if (block) {
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block(imageTag);
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}
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});
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}
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- (void)getImageForTag:(NSString *)imageTag withBlock:(void (^)(UIImage *image))block
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{
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RCTAssert(block != nil, @"block must not be nil");
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dispatch_async(dispatch_get_main_queue(), ^{
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block([self imageForTag:imageTag]);
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});
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}
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// TODO (#5906496): Name could be more explicit - something like getBase64EncodedJPEGDataForTag:?
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RCT_EXPORT_METHOD(getBase64ForTag:(NSString *)imageTag
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successCallback:(RCTResponseSenderBlock)successCallback
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errorCallback:(RCTResponseErrorBlock)errorCallback)
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{
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[self getImageForTag:imageTag withBlock:^(UIImage *image) {
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if (!image) {
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errorCallback(RCTErrorWithMessage([NSString stringWithFormat:@"Invalid imageTag: %@", imageTag]));
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return;
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}
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dispatch_async(_methodQueue, ^{
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NSData *imageData = UIImageJPEGRepresentation(image, 1.0);
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NSString *base64 = [imageData base64EncodedStringWithOptions:NSDataBase64EncodingEndLineWithLineFeed];
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successCallback(@[[base64 stringByReplacingOccurrencesOfString:@"\n" withString:@""]]);
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});
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}];
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}
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RCT_EXPORT_METHOD(addImageFromBase64:(NSString *)base64String
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successCallback:(RCTResponseSenderBlock)successCallback
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errorCallback:(RCTResponseErrorBlock)errorCallback)
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{
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NSData *imageData = [[NSData alloc] initWithBase64EncodedString:base64String options:0];
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if (imageData) {
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UIImage *image = [[UIImage alloc] initWithData:imageData];
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[self storeImage:image withBlock:^(NSString *imageTag) {
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successCallback(@[imageTag]);
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}];
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} else {
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errorCallback(RCTErrorWithMessage(@"Failed to add image from base64String"));
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}
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}
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#pragma mark - RCTImageLoader
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- (BOOL)canLoadImageURL:(NSURL *)requestURL
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{
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return [requestURL.scheme.lowercaseString isEqualToString:@"rct-image-store"];
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}
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- (RCTImageLoaderCancellationBlock)loadImageForURL:(NSURL *)imageURL size:(CGSize)size scale:(CGFloat)scale resizeMode:(UIViewContentMode)resizeMode progressHandler:(RCTImageLoaderProgressBlock)progressHandler completionHandler:(RCTImageLoaderCompletionBlock)completionHandler
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{
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NSString *imageTag = imageURL.absoluteString;
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[self getImageForTag:imageTag withBlock:^(UIImage *image) {
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if (image) {
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completionHandler(nil, image);
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} else {
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NSString *errorMessage = [NSString stringWithFormat:@"Unable to load image from image store: %@", imageTag];
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NSError *error = RCTErrorWithMessage(errorMessage);
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completionHandler(error, nil);
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}
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}];
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return nil;
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}
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@end
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@implementation RCTBridge (RCTImageStoreManager)
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- (RCTImageStoreManager *)imageStoreManager
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{
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return self.modules[RCTBridgeModuleNameForClass([RCTImageStoreManager class])];
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}
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@end
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