react-native-navigation/lib/ios/RNNNavigationButtons.m

#import "RNNNavigationButtons.h"
#import "RNNUIBarButtonItem.h"
#import <React/RCTConvert.h>
#import "RCTHelpers.h"
#import "UIImage+tint.h"
#import "RNNComponentViewController.h"
#import "UIImage+insets.h"
#import "UIViewController+LayoutProtocol.h"
#import "RNNFontAttributesCreator.h"
#import "NSArray+utils.h"

@interface RNNNavigationButtons()

@property (weak, nonatomic) UIViewController<RNNLayoutProtocol>* viewController;
@property (strong, nonatomic) RNNButtonOptions* defaultLeftButtonStyle;
@property (strong, nonatomic) RNNButtonOptions* defaultRightButtonStyle;
@property (strong, nonatomic) RNNReactComponentRegistry* componentRegistry;
@end

@implementation RNNNavigationButtons

-(instancetype)initWithViewController:(UIViewController<RNNLayoutProtocol>*)viewController componentRegistry:(id)componentRegistry {
    self = [super init];
    
    self.viewController = viewController;
    self.componentRegistry = componentRegistry;
    
    return self;
}

- (void)applyLeftButtons:(NSArray *)leftButtons rightButtons:(NSArray *)rightButtons defaultLeftButtonStyle:(RNNButtonOptions *)defaultLeftButtonStyle defaultRightButtonStyle:(RNNButtonOptions *)defaultRightButtonStyle {
    _defaultLeftButtonStyle = defaultLeftButtonStyle;
    _defaultRightButtonStyle = defaultRightButtonStyle;
    if (leftButtons) {
        [self setButtons:leftButtons side:@"left" animated:NO defaultStyle:_defaultLeftButtonStyle insets:[self leftButtonInsets:_defaultLeftButtonStyle.iconInsets]];
    }
    
    if (rightButtons) {
        [self setButtons:rightButtons side:@"right" animated:NO defaultStyle:_defaultRightButtonStyle insets:[self rightButtonInsets:_defaultRightButtonStyle.iconInsets]];
    }
}

-(void)setButtons:(NSArray*)buttons side:(NSString*)side animated:(BOOL)animated defaultStyle:(RNNButtonOptions *)defaultStyle insets:(UIEdgeInsets)insets {
    NSMutableArray *barButtonItems = [NSMutableArray new];
    NSArray* resolvedButtons = [self resolveButtons:buttons];
    for (NSDictionary *button in resolvedButtons) {
        RNNUIBarButtonItem* barButtonItem = [self buildButton:button defaultStyle:defaultStyle insets:insets];
        if(barButtonItem) {
            [barButtonItems addObject:barButtonItem];
        }
        UIColor* color = [self color:[RCTConvert UIColor:button[@"color"]] defaultColor:[defaultStyle.color getWithDefaultValue:nil]];
        if (color) {
            self.viewController.navigationController.navigationBar.tintColor = color;
        }
    }
    
    if ([side isEqualToString:@"left"]) {
        [self clearPreviousButtonViews:barButtonItems oldButtons:self.viewController.navigationItem.leftBarButtonItems];
        [self.viewController.navigationItem setLeftBarButtonItems:barButtonItems animated:animated];
    }
    
    if ([side isEqualToString:@"right"]) {
        [self clearPreviousButtonViews:barButtonItems oldButtons:self.viewController.navigationItem.rightBarButtonItems];
        [self.viewController.navigationItem setRightBarButtonItems:barButtonItems animated:animated];
    }
}

- (void)clearPreviousButtonViews:(NSArray<UIBarButtonItem *> *)newButtons oldButtons:(NSArray<UIBarButtonItem *> *)oldButtons {
    NSArray<UIBarButtonItem *>* removedButtons = [oldButtons difference:newButtons withPropertyName:@"customView"];
    
    for (UIBarButtonItem* buttonItem in removedButtons) {
        RNNReactView* reactView = buttonItem.customView;
        if ([reactView isKindOfClass:[RNNReactView class]]) {
            [_componentRegistry removeChildComponent:reactView.componentId];
        }
    }
}

- (NSArray *)resolveButtons:(id)buttons {
    if ([buttons isKindOfClass:[NSArray class]]) {
        return buttons;
    } else {
        return @[buttons];
    }
}

-(RNNUIBarButtonItem*)buildButton: (NSDictionary*)dictionary defaultStyle:(RNNButtonOptions *)defaultStyle insets:(UIEdgeInsets)insets {
    NSString* buttonId = dictionary[@"id"];
    NSString* title = [self getValue:dictionary[@"text"] withDefault:[defaultStyle.text getWithDefaultValue:nil]];
    NSDictionary* component = dictionary[@"component"];
    NSString* systemItemName = dictionary[@"systemItem"];
    
    UIColor* color = [self color:[RCTConvert UIColor:dictionary[@"color"]] defaultColor:[defaultStyle.color getWithDefaultValue:nil]];
    UIColor* disabledColor = [self color:[RCTConvert UIColor:dictionary[@"disabledColor"]] defaultColor:[defaultStyle.disabledColor getWithDefaultValue:nil]];
    
    if (!buttonId) {
        @throw [NSException exceptionWithName:@"NSInvalidArgumentException" reason:[@"button id is not specified " stringByAppendingString:title] userInfo:nil];
    }
    
    UIImage* defaultIcon = [defaultStyle.icon getWithDefaultValue:nil];
    UIImage* iconImage = [self getValue:dictionary[@"icon"] withDefault:defaultIcon];
    if (![iconImage isKindOfClass:[UIImage class]]) {
        iconImage = [RCTConvert UIImage:iconImage];
    }
    
    if (iconImage) {
        iconImage = [iconImage imageWithInsets:insets];
        if (color) {
            iconImage = [iconImage withTintColor:color];
        }
    }
    
    
    RNNUIBarButtonItem *barButtonItem;
    if (component) {
        RNNComponentOptions* componentOptions = [RNNComponentOptions new];
        componentOptions.componentId = [[Text alloc] initWithValue:component[@"componentId"]];
        componentOptions.name = [[Text alloc] initWithValue:component[@"name"]];
        
        RNNReactView *view = [_componentRegistry createComponentIfNotExists:componentOptions parentComponentId:self.viewController.layoutInfo.componentId reactViewReadyBlock:nil];
        barButtonItem = [[RNNUIBarButtonItem alloc] init:buttonId withCustomView:view];
    } else if (iconImage) {
        barButtonItem = [[RNNUIBarButtonItem alloc] init:buttonId withIcon:iconImage];
    } else if (title) {
        barButtonItem = [[RNNUIBarButtonItem alloc] init:buttonId withTitle:title];
        
        NSMutableDictionary *buttonTextAttributes = [RCTHelpers textAttributesFromDictionary:dictionary withPrefix:@"button"];
        if (buttonTextAttributes.allKeys.count > 0) {
            [barButtonItem setTitleTextAttributes:buttonTextAttributes forState:UIControlStateNormal];
        }
    } else if (systemItemName) {
        barButtonItem = [[RNNUIBarButtonItem alloc] init:buttonId withSystemItem:systemItemName];
    } else {
        return nil;
    }
    
    barButtonItem.target = self.viewController;
    barButtonItem.action = @selector(onButtonPress:);
    
    NSNumber *enabled = [self getValue:dictionary[@"enabled"] withDefault:defaultStyle.enabled.getValue];
    BOOL enabledBool = enabled ? [enabled boolValue] : YES;
    [barButtonItem setEnabled:enabledBool];
    
    NSMutableDictionary* textAttributes = [NSMutableDictionary dictionaryWithDictionary:[RNNFontAttributesCreator createWithFontFamily:dictionary[@"fontFamily"] ?: [defaultStyle.fontFamily getWithDefaultValue:nil] fontSize:dictionary[@"fontSize"] defaultFontSize:[defaultStyle.fontSize getWithDefaultValue:@(17)] fontWeight:dictionary[@"fontWeight"] color:nil defaultColor:nil]];
    NSMutableDictionary* disabledTextAttributes = [NSMutableDictionary dictionaryWithDictionary:[RNNFontAttributesCreator createWithFontFamily:dictionary[@"fontFamily"] ?: [defaultStyle.fontFamily getWithDefaultValue:nil] fontSize:dictionary[@"fontSize"] defaultFontSize:[defaultStyle.fontSize getWithDefaultValue:@(17)] fontWeight:dictionary[@"fontWeight"] color:nil defaultColor:nil]];
    
    if (!enabledBool && disabledColor) {
        color = disabledColor;
        [disabledTextAttributes setObject:disabledColor forKey:NSForegroundColorAttributeName];
    }
    
    if (color) {
        [textAttributes setObject:color forKey:NSForegroundColorAttributeName];
        [barButtonItem setImage:[[iconImage withTintColor:color] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
        barButtonItem.tintColor = color;
    }
    
    [barButtonItem setTitleTextAttributes:textAttributes forState:UIControlStateNormal];
    [barButtonItem setTitleTextAttributes:textAttributes forState:UIControlStateHighlighted];
    [barButtonItem setTitleTextAttributes:disabledTextAttributes forState:UIControlStateDisabled];
    
    NSString *testID = dictionary[@"testID"];
    if (testID)
    {
        barButtonItem.accessibilityIdentifier = testID;
    }
    
    return barButtonItem;
}

- (UIColor *)color:(UIColor *)color defaultColor:(UIColor *)defaultColor {
    if (color) {
        return color;
    } else if (defaultColor) {
        return defaultColor;
    }
    
    return nil;
}

- (id)getValue:(id)value withDefault:(id)defaultValue {
    return value ? value : defaultValue;
}

- (UIEdgeInsets)leftButtonInsets:(RNNInsetsOptions *)defaultInsets {
    return UIEdgeInsetsMake([defaultInsets.top getWithDefaultValue:0],
                            [defaultInsets.left getWithDefaultValue:0],
                            [defaultInsets.bottom getWithDefaultValue:0],
                            [defaultInsets.right getWithDefaultValue:15]);
}

- (UIEdgeInsets)rightButtonInsets:(RNNInsetsOptions *)defaultInsets {
    return UIEdgeInsetsMake([defaultInsets.top getWithDefaultValue:0],
                            [defaultInsets.left getWithDefaultValue:15],
                            [defaultInsets.bottom getWithDefaultValue:0],
                            [defaultInsets.right getWithDefaultValue:0]);
}

@end