RCTHelpers.m

#import "RCTHelpers.h"
#import <React/RCTFont.h>
#import <React/RCTScrollView.h>
#import <React/RCTView.h>

@implementation RCTHelpers

+ (NSMutableDictionary *)textAttributesFromDictionary:(NSDictionary *)dictionary
                                           withPrefix:(NSString *)prefix
                                             baseFont:(UIFont *)baseFont {
    NSMutableDictionary *textAttributes = [NSMutableDictionary new];

    NSString *colorKey = @"color";
    NSString *familyKey = @"fontFamily";
    NSString *weightKey = @"fontWeight";
    NSString *sizeKey = @"fontSize";
    NSString *styleKey = @"fontStyle";
    NSString *shadowColourKey = @"shadowColor";
    NSString *shadowOffsetKey = @"shadowOffset";
    NSString *shadowBlurRadiusKey = @"shadowBlurRadius";
    NSString *showShadowKey = @"showShadow";

    if (prefix) {

        colorKey = [colorKey
            stringByReplacingCharactersInRange:NSMakeRange(0, 1)
                                    withString:[colorKey substringToIndex:1].capitalizedString];
        colorKey = [NSString stringWithFormat:@"%@%@", prefix, colorKey];

        familyKey = [familyKey
            stringByReplacingCharactersInRange:NSMakeRange(0, 1)
                                    withString:[familyKey substringToIndex:1].capitalizedString];
        familyKey = [NSString stringWithFormat:@"%@%@", prefix, familyKey];

        weightKey = [weightKey
            stringByReplacingCharactersInRange:NSMakeRange(0, 1)
                                    withString:[weightKey substringToIndex:1].capitalizedString];
        weightKey = [NSString stringWithFormat:@"%@%@", prefix, weightKey];

        sizeKey = [sizeKey
            stringByReplacingCharactersInRange:NSMakeRange(0, 1)
                                    withString:[sizeKey substringToIndex:1].capitalizedString];
        sizeKey = [NSString stringWithFormat:@"%@%@", prefix, sizeKey];

        styleKey = [styleKey
            stringByReplacingCharactersInRange:NSMakeRange(0, 1)
                                    withString:[styleKey substringToIndex:1].capitalizedString];
        styleKey = [NSString stringWithFormat:@"%@%@", prefix, styleKey];

        shadowColourKey =
            [shadowColourKey stringByReplacingCharactersInRange:NSMakeRange(0, 1)
                                                     withString:[shadowColourKey substringToIndex:1]
                                                                    .capitalizedString];
        shadowColourKey = [NSString stringWithFormat:@"%@%@", prefix, shadowColourKey];

        shadowOffsetKey =
            [shadowOffsetKey stringByReplacingCharactersInRange:NSMakeRange(0, 1)
                                                     withString:[shadowOffsetKey substringToIndex:1]
                                                                    .capitalizedString];
        shadowOffsetKey = [NSString stringWithFormat:@"%@%@", prefix, shadowOffsetKey];

        shadowBlurRadiusKey = [shadowBlurRadiusKey
            stringByReplacingCharactersInRange:NSMakeRange(0, 1)
                                    withString:[shadowBlurRadiusKey substringToIndex:1]
                                                   .capitalizedString];
        shadowBlurRadiusKey = [NSString stringWithFormat:@"%@%@", prefix, shadowBlurRadiusKey];

        showShadowKey =
            [showShadowKey stringByReplacingCharactersInRange:NSMakeRange(0, 1)
                                                   withString:[showShadowKey substringToIndex:1]
                                                                  .capitalizedString];
        showShadowKey = [NSString stringWithFormat:@"%@%@", prefix, showShadowKey];
    }

    NSShadow *shadow;

    NSNumber *shadowColor = dictionary[shadowColourKey];
    if (shadowColor && [shadowColor isKindOfClass:[NSNumber class]]) {
        if (!shadow) {
            shadow = [NSShadow new];
        }
        shadow.shadowColor = [RCTConvert UIColor:shadowColor];
    }

    NSDictionary *shadowOffsetDict = dictionary[shadowOffsetKey];
    if (shadowOffsetDict && [shadowOffsetDict isKindOfClass:[NSDictionary class]]) {
        CGSize shadowOffset = [RCTConvert CGSize:shadowOffsetDict];
        if (!shadow) {
            shadow = [NSShadow new];
        }
        shadow.shadowOffset = shadowOffset;
    }

    NSNumber *shadowRadius = dictionary[shadowBlurRadiusKey];
    if (shadowRadius) {
        CGFloat radius = [RCTConvert CGFloat:shadowRadius];
        if (!shadow) {
            shadow = [NSShadow new];
        }
        shadow.shadowBlurRadius = radius;
    }

    NSNumber *showShadow = dictionary[showShadowKey];
    if (showShadow) {
        BOOL show = [RCTConvert BOOL:showShadow];
        if (!show) {
            shadow = nil;
        }
    }

    if (shadow) {
        [textAttributes setObject:shadow forKey:NSShadowAttributeName];
    }

    NSNumber *textColor = dictionary[colorKey];
    if (textColor && [textColor isKindOfClass:[NSNumber class]]) {
        UIColor *color = [RCTConvert UIColor:textColor];
        [textAttributes setObject:color forKey:NSForegroundColorAttributeName];
    }

    NSString *fontFamily = dictionary[familyKey];
    if (![fontFamily isKindOfClass:[NSString class]]) {
        fontFamily = nil;
    }

    NSString *fontWeight = dictionary[weightKey];
    if (![fontWeight isKindOfClass:[NSString class]]) {
        fontWeight = nil;
    }

    NSNumber *fontSize = dictionary[sizeKey];
    if (![fontSize isKindOfClass:[NSNumber class]]) {
        fontSize = nil;
    }

    NSString *fontStyle = dictionary[styleKey];
    if (![fontStyle isKindOfClass:[NSString class]]) {
        fontStyle = nil;
    }

    UIFont *font = [RCTFont updateFont:baseFont
                            withFamily:fontFamily
                                  size:fontSize
                                weight:fontWeight
                                 style:fontStyle
                               variant:nil
                       scaleMultiplier:1];

    if (font && (fontStyle || fontWeight || fontSize || fontFamily)) {
        [textAttributes setObject:font forKey:NSFontAttributeName];
    }

    return textAttributes;
}

+ (NSMutableDictionary *)textAttributesFromDictionary:(NSDictionary *)dictionary
                                           withPrefix:(NSString *)prefix {
    return [self textAttributesFromDictionary:dictionary
                                   withPrefix:prefix
                                     baseFont:[UIFont systemFontOfSize:[UIFont systemFontSize]]];
}

+ (NSString *)getTimestampString {
    long long milliseconds = (long long)([[NSDate date] timeIntervalSince1970] * 1000.0);
    return [NSString stringWithFormat:@"%lld", milliseconds];
}

+ (NSArray *)getAllSubviewsForView:(UIView *)view {
    NSMutableArray *allSubviews = [NSMutableArray new];
    for (UIView *subview in view.subviews) {
        [allSubviews addObject:subview];
        [allSubviews addObjectsFromArray:[self getAllSubviewsForView:subview]];
    }
    return allSubviews;
}

/*
 The YellowBox is added to each RCTRootView. Regardless if there are warnings or
 not, if there's a warning anywhere in the app - it is added Since it is always
 appears on the top, it blocks interactions with other components. It is most
 noticeable in RCCLightBox and RCCNotification where button (for example) are
 not clickable if placed at the bottom part of the view
 */

+ (BOOL)removeYellowBox:(RCTRootView *)reactRootView {
#ifndef DEBUG
    return YES;
#endif

    BOOL removed = NO;

    NSArray *subviews = [self getAllSubviewsForView:reactRootView];
    for (UIView *view in subviews) {
        if ([view isKindOfClass:[RCTView class]]) {
            CGFloat r, g, b, a;
            [view.backgroundColor getRed:&r green:&g blue:&b alpha:&a];

            // identify the yellow view by its hard-coded color and height
            if ((lrint(r * 255) == 250) && (lrint(g * 255) == 186) && (lrint(b * 255) == 48) &&
                (lrint(a * 100) == 95) && (view.frame.size.height == 48)) {
                UIView *yelloboxParentView = view;
                while (view.superview != nil) {
                    yelloboxParentView = yelloboxParentView.superview;
                    if ([yelloboxParentView isKindOfClass:[RCTScrollView class]]) {
                        yelloboxParentView = yelloboxParentView.superview;
                        break;
                    }
                }

                [yelloboxParentView removeFromSuperview];
                removed = YES;
                break;
            }
        }

        if (removed) {
            break;
        }
    }

    return removed;
}

@end