MerryPhotoView.m

//  Created by react-native-create-bridge
#import "MerryPhotoView.h"
#import <Foundation/Foundation.h>

@implementation MerryPhotoView {

    __weak RCTBridge* _bridge;
}
//@synthesize bridge = _bridge;

- (instancetype)initWithBridge:(RCTBridge*)bridge
{
    if ((self = [super init])) {
        _bridge = bridge;
    }

    return self;
}
- (void)didMoveToWindow
{
    if (self.data) {
        [self showViewer:self.data];
    }
}
- (void)removeFromSuperview
{
    [self hideViewer];
}
- (void)invalidate
{
    [self hideViewer];
}
- (void)clean
{
    self.nytPhotosViewController = nil;
    self.dataSource = nil;
    self.photos = nil;
    self.data = nil;
    self.reactPhotos = nil;
}
/**
 Get root view

 @param rootViewController <#rootViewController description#>
 @return presented View
 */
- (UIViewController*)visibleViewController:(UIViewController*)rootViewController
{
    if (rootViewController.presentedViewController == nil) {
        return rootViewController;
    }
    if ([rootViewController.presentedViewController isKindOfClass:[UINavigationController class]]) {
        UINavigationController* navigationController = (UINavigationController*)rootViewController.presentedViewController;
        UIViewController* lastViewController = [[navigationController viewControllers] lastObject];

        return [self visibleViewController:lastViewController];
    }
    if ([rootViewController.presentedViewController isKindOfClass:[UITabBarController class]]) {
        UITabBarController* tabBarController = (UITabBarController*)rootViewController.presentedViewController;
        UIViewController* selectedViewController = tabBarController.selectedViewController;

        return [self visibleViewController:selectedViewController];
    }

    UIViewController* presentedViewController = (UIViewController*)rootViewController.presentedViewController;

    return [self visibleViewController:presentedViewController];
}

- (UIViewController*)getRootView
{
    UIViewController* rootView =
        [self visibleViewController:[UIApplication sharedApplication].keyWindow.rootViewController];
    return rootView;
}

- (void)hideViewer
{
    [self.nytPhotosViewController dismissViewControllerAnimated:YES completion:nil];
    [self clean];
}

- (void)showViewer:(NSArray*)data
{

    if (!data) {
        //        reject(@"9527", @"Display photo viewer failed, please config it first", nil);
        return;
    }

    NSMutableArray* msPhotos = [NSMutableArray array];
    NSMutableArray* rsPhotos = [NSMutableArray array];

    for (NSDictionary* dic in data) {

        MerryPhotoData* d = [[MerryPhotoData alloc] initWithDictionary:dic];

        MerryPhoto* merryPhoto = [MerryPhoto new];

        merryPhoto.image = nil;

        if (d.title) {
            merryPhoto.attributedCaptionTitle = [MerryPhotoView attributedTitleFromString:d.title:d.titleColor ? [RCTConvert UIColor:d.titleColor] : [UIColor whiteColor]];
        }
        if (d.summary) {
            merryPhoto.attributedCaptionSummary = [MerryPhotoView attributedSummaryFromString:d.summary:d.summaryColor ? [RCTConvert UIColor:d.summaryColor] : [UIColor lightGrayColor]];
        }

        [msPhotos addObject:merryPhoto];

        [rsPhotos addObject:d];
    }

    self.photos = msPhotos;
    self.reactPhotos = rsPhotos;

    self.dataSource = [NYTPhotoViewerArrayDataSource dataSourceWithPhotos:self.photos];
    NSInteger initialPhoto = self.initial;

    dispatch_async(dispatch_get_main_queue(), ^{

        @try {
            NYTPhotosViewController* photosViewController = [[NYTPhotosViewController alloc]
                initWithDataSource:self.dataSource
                      initialPhoto:[self.photos objectAtIndex:initialPhoto]
                          delegate:self];
            //   TODO add options for:
            // hide left bar button
            if (self.hideCloseButton) {
                photosViewController.leftBarButtonItem = nil;
            }
            // hide right bar button
            if (self.hideShareButton) {
                photosViewController.rightBarButtonItem = nil;
            }

            self.nytPhotosViewController = photosViewController;

            [[self getRootView] presentViewController:photosViewController
                                             animated:YES
                                           completion:nil];
            if (initialPhoto >= 0) {
                [self updatePhotoAtIndex:photosViewController Index:initialPhoto];
            }
            if (self.hideStatusBar) {
                [[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation:YES];
            }
            //            resolve(@"");
        } @catch (NSException* exception) {
            //            reject(@"9527", @"Display photo viewer failed, please check your configurations", nil);
        } @finally {
        }

    });
}
+ (NSString*)contentTypeForImageData:(NSData*)data
{
    uint8_t c;
    [data getBytes:&c length:1];

    switch (c) {
    case 0xFF:
        return @"jpeg";
    case 0x89:
        return @"png";
    case 0x47:
        return @"gif";
    case 0x49:
    case 0x4D:
        return @"tiff";
    }
    return nil;
}
/**
 Update Photo
 @param photosViewController <#photosViewController description#>
 @param photoIndex <#photoIndex description#>
 */
- (void)updatePhotoAtIndex:(NYTPhotosViewController*)photosViewController
                     Index:(NSUInteger)photoIndex
{
    NSInteger current = (unsigned long)photoIndex;
    MerryPhoto* currentPhoto = [self.dataSource.photos objectAtIndex:current];
    MerryPhotoData* d = self.reactPhotos[current];

    //
    //            NSString* url = d.url;
    //            NSURL* imageURL = [NSURL URLWithString:url];

    // check an url is a gif image.
    // NOTE: this check require your url have an extension.
    //            BOOL isGif = [[imageURL pathExtension] isEqual:@"gif"];

    [_bridge.imageLoader loadImageWithURLRequest:d.source.request
        size:d.source.size
        scale:d.source.scale
        clipped:YES
        resizeMode:RCTResizeModeStretch
        progressBlock:^(int64_t progress, int64_t total) {
//            NSLog(@"%lld %lld", progress, total);
        }
        partialLoadBlock:nil
        completionBlock:^(NSError* error, UIImage* image) {
            if (image) {
                dispatch_async(dispatch_get_main_queue(), ^{

                    //                    NSData *data = UIImagePNGRepresentation(image);
                    //                    NSString* ext = [MerryPhotoView contentTypeForImageData:data];
                    //                    BOOL isGif = ext && [ext isEqualToString:@"gif"];

                    //                    if(isGif){
                    //                        currentPhoto.imageData = data;
                    //                    }else{
                    //                        currentPhoto.image = image;
                    //                    }
                    //
                    currentPhoto.image = image;

                    [photosViewController updatePhoto:currentPhoto];

                });
            }
        }];
}

#pragma mark - NYTPhotosViewControllerDelegate
- (UIView*)photosViewController:(NYTPhotosViewController*)photosViewController loadingViewForPhoto:(id<NYTPhoto>)photo
{
    return nil;
}
- (UIView*)photosViewController:(NYTPhotosViewController*)photosViewController
          referenceViewForPhoto:(id<NYTPhoto>)photo
{
    return nil;
}

/**
 Customize title display

 @param photosViewController <#photosViewController description#>
 @param photo <#photo description#>
 @param photoIndex <#photoIndex description#>
 @param totalPhotoCount <#totalPhotoCount description#>
 @return <#return value description#>
 */
- (NSString*)photosViewController:(NYTPhotosViewController*)photosViewController
                    titleForPhoto:(id<NYTPhoto>)photo
                          atIndex:(NSInteger)photoIndex
                  totalPhotoCount:(nullable NSNumber*)totalPhotoCount
{
    return [NSString stringWithFormat:@"%lu / %lu", (unsigned long)photoIndex + 1,
                     (unsigned long)totalPhotoCount.integerValue];
}

/**
 Download current photo if its nil

 @param photosViewController <#photosViewController description#>
 @param photo <#photo description#>
 @param photoIndex <#photoIndex description#>
 */
- (void)photosViewController:(NYTPhotosViewController*)photosViewController
          didNavigateToPhoto:(id<NYTPhoto>)photo
                     atIndex:(NSUInteger)photoIndex
{
    if (!photo.image || !photo.imageData) {
        [self updatePhotoAtIndex:photosViewController Index:photoIndex];
    }
    // NOTE: onChange are useless so we don't plan to implementing it.
    //    MerryPhotoData* current = [self.reactPhotos objectAtIndex:photoIndex];
    //
    //    if (self.onNavigateToPhoto) {
    //        self.onNavigateToPhoto(@{
    //            @"currentPhoto" : current
    //        });
    //    }
}

- (void)displayActivityViewController:(UIActivityViewController*)controller animated:(BOOL)animated
{

    [[self getRootView] presentViewController:controller animated:animated completion:nil];
}
- (BOOL)photosViewController:(NYTPhotosViewController*)photosViewController handleLongPressForPhoto:(id<NYTPhoto>)photo withGestureRecognizer:(UILongPressGestureRecognizer*)longPressGestureRecognizer
{

    if ((photosViewController.currentlyDisplayedPhoto.image || photosViewController.currentlyDisplayedPhoto.imageData)) {
        UIImage* image = photosViewController.currentlyDisplayedPhoto.image ? photosViewController.currentlyDisplayedPhoto.image : [UIImage imageWithData:photosViewController.currentlyDisplayedPhoto.imageData];
        UIActivityViewController* activityViewController = [[UIActivityViewController alloc] initWithActivityItems:@[ image ] applicationActivities:nil];

        activityViewController.completionWithItemsHandler = ^(NSString* __nullable activityType, BOOL completed, NSArray* __nullable returnedItems, NSError* __nullable activityError) {
            if (completed && [photosViewController.delegate respondsToSelector:@selector(photosViewController:actionCompletedWithActivityType:)]) {
                [photosViewController.delegate photosViewController:photosViewController actionCompletedWithActivityType:activityType];
            }
        };

        [self displayActivityViewController:activityViewController animated:YES];
    }
    return YES;
}
- (void)photosViewControllerDidDismiss:(NYTPhotosViewController*)photosViewController
{

    if (self.hideStatusBar) {
        [[UIApplication sharedApplication] setStatusBarHidden:NO withAnimation:NO];
    }

    if (self.onDismiss) {
        self.onDismiss(nil);
    }
    [self clean];
}

+ (NSAttributedString*)attributedTitleFromString:(NSString*)caption
                                                :(UIColor*)color
{
    return [[NSAttributedString alloc]
        initWithString:caption
            attributes:@{
                NSForegroundColorAttributeName : color,
                NSFontAttributeName : [UIFont preferredFontForTextStyle:UIFontTextStyleBody]
            }];
}

+ (NSAttributedString*)attributedSummaryFromString:(NSString*)summary
                                                  :(UIColor*)color
{
    return [[NSAttributedString alloc]
        initWithString:summary
            attributes:@{
                NSForegroundColorAttributeName : color,
                NSFontAttributeName : [UIFont preferredFontForTextStyle:UIFontTextStyleBody]
            }];
}

@end