react-native-navigation/ios/RCCNavigationController.m

#import "RCCNavigationController.h"
#import "RCCViewController.h"
#import "RCCManager.h"
#import <React/RCTEventDispatcher.h>
#import <React/RCTUIManager.h>
#if __has_include(<React/RCTUIManagerUtils.h>)
#import <React/RCTUIManagerUtils.h>
#endif
#import <React/RCTConvert.h>
#import <React/RCTRootView.h>
#import <objc/runtime.h>
#import "RCCTitleViewHelper.h"
#import "RCCCustomBarButtonItem.h"
#import "UIViewController+Rotation.h"
#import "RCTHelpers.h"
#import "RCTConvert+UIBarButtonSystemItem.h"

@implementation RCCNavigationController {
    BOOL _transitioning;
    NSMutableArray *_queuedViewControllers;
}

NSString const *CALLBACK_ASSOCIATED_KEY = @"RCCNavigationController.CALLBACK_ASSOCIATED_KEY";
NSString const *CALLBACK_ASSOCIATED_ID = @"RCCNavigationController.CALLBACK_ASSOCIATED_ID";


-(UIInterfaceOrientationMask)supportedInterfaceOrientations {
    return [self supportedControllerOrientations];
}

- (instancetype)initWithProps:(NSDictionary *)props children:(NSArray *)children globalProps:(NSDictionary*)globalProps bridge:(RCTBridge *)bridge {
    _queuedViewControllers = [NSMutableArray new];
    
    NSString *component = props[@"component"];
    if (!component) return nil;
    
    NSDictionary *passProps = props[@"passProps"];
    NSDictionary *navigatorStyle = props[@"style"];
    
    RCCViewController *viewController = [[RCCViewController alloc] initWithComponent:component passProps:passProps navigatorStyle:navigatorStyle globalProps:globalProps bridge:bridge];
    if (!viewController) return nil;
    viewController.controllerId = passProps[@"screenInstanceID"];
    
    NSArray *leftButtons = props[@"leftButtons"];
    if (leftButtons) {
        [self setButtons:leftButtons viewController:viewController side:@"left" animated:NO];
    }
    
    NSArray *rightButtons = props[@"rightButtons"];
    if (rightButtons) {
        [self setButtons:rightButtons viewController:viewController side:@"right" animated:NO];
    }
    
    self = [super initWithRootViewController:viewController];
    if (!self) return nil;
    self.delegate = self;
    
    self.navigationBar.translucent = NO; // default
    
    [self processTitleView:viewController
                     props:props
                     style:navigatorStyle];
    
    
    [self setRotation:props];
    
    NSArray* components = props[@"components"];
    if (components.count) {
        for (NSDictionary* component in components) {
            NSMutableDictionary *mutableParams = [[NSMutableDictionary alloc] initWithDictionary:@{@"animated": @(0), @"component": component[@"screen"]}];
            [mutableParams addEntriesFromDictionary:component];
            [self performAction:@"push" actionParams:mutableParams bridge:bridge];
        }
    }
    
    return self;
}


- (void)performAction:(NSString*)performAction actionParams:(NSDictionary*)actionParams bridge:(RCTBridge *)bridge {
    BOOL animated = actionParams[@"animated"] ? [actionParams[@"animated"] boolValue] : YES;
    
    // push
    if ([performAction isEqualToString:@"push"]) {
        NSString *component = actionParams[@"component"];
        if (!component) return;
        
        NSMutableDictionary *passProps = [actionParams[@"passProps"] mutableCopy];
        passProps[GLOBAL_SCREEN_ACTION_COMMAND_TYPE] = COMMAND_TYPE_PUSH;
        passProps[GLOBAL_SCREEN_ACTION_TIMESTAMP] = actionParams[GLOBAL_SCREEN_ACTION_TIMESTAMP];
        NSDictionary *navigatorStyle = actionParams[@"style"] ? actionParams[@"style"] : actionParams[@"navigatorStyle"];
        
        NSNumber *keepStyleAcrossPush = [[RCCManager sharedInstance] getAppStyle][@"keepStyleAcrossPush"];
        BOOL keepStyleAcrossPushBool = keepStyleAcrossPush ? [keepStyleAcrossPush boolValue] : YES;
        
        if (keepStyleAcrossPushBool) {
            
            if ([self.topViewController isKindOfClass:[RCCViewController class]]) {
                RCCViewController *parent = (RCCViewController*)self.topViewController;
                NSMutableDictionary *mergedStyle = [NSMutableDictionary dictionaryWithDictionary:parent.navigatorStyle];
                
                // there are a few styles that we don't want to remember from our parent (they should be local)
                [mergedStyle removeObjectForKey:@"navBarHidden"];
                [mergedStyle removeObjectForKey:@"statusBarHidden"];
                [mergedStyle removeObjectForKey:@"navBarHideOnScroll"];
                [mergedStyle removeObjectForKey:@"drawUnderNavBar"];
                [mergedStyle removeObjectForKey:@"drawUnderTabBar"];
                [mergedStyle removeObjectForKey:@"statusBarBlur"];
                [mergedStyle removeObjectForKey:@"navBarBlur"];
                [mergedStyle removeObjectForKey:@"navBarTranslucent"];
                [mergedStyle removeObjectForKey:@"statusBarHideWithNavBar"];
                [mergedStyle removeObjectForKey:@"autoAdjustScrollViewInsets"];
                [mergedStyle removeObjectForKey:@"statusBarTextColorSchemeSingleScreen"];
                [mergedStyle removeObjectForKey:@"disabledBackGesture"];
                [mergedStyle removeObjectForKey:@"disabledSimultaneousGesture"];
                [mergedStyle removeObjectForKey:@"navBarCustomView"];
                [mergedStyle removeObjectForKey:@"navBarComponentAlignment"];
                
                [mergedStyle addEntriesFromDictionary:navigatorStyle];
                navigatorStyle = mergedStyle;
            }
        }
        
        NSMutableDictionary *mergedStyle = [NSMutableDictionary dictionaryWithDictionary:navigatorStyle];
        [mergedStyle setValuesForKeysWithDictionary:actionParams];
        
        navigatorStyle = mergedStyle;
        
        RCCViewController *viewController = [[RCCViewController alloc] initWithComponent:component passProps:passProps navigatorStyle:navigatorStyle globalProps:nil bridge:bridge];
        viewController.controllerId = passProps[@"screenInstanceID"];
        
        NSString *backButtonTitle = actionParams[@"backButtonTitle"];
        if (!backButtonTitle) {
            NSNumber *hideBackButtonTitle = [[RCCManager sharedInstance] getAppStyle][@"hideBackButtonTitle"];
            BOOL hideBackButtonTitleBool = hideBackButtonTitle ? [hideBackButtonTitle boolValue] : NO;
            backButtonTitle = hideBackButtonTitleBool ? @"" : backButtonTitle;
        }
        
        if (backButtonTitle) {
            UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithTitle:backButtonTitle
                                                                         style:UIBarButtonItemStylePlain
                                                                        target:nil
                                                                        action:nil];
            
            self.topViewController.navigationItem.backBarButtonItem = backItem;
        } else {
            self.topViewController.navigationItem.backBarButtonItem = nil;
        }
        
        NSNumber *backButtonHidden = actionParams[@"backButtonHidden"];
        BOOL backButtonHiddenBool = backButtonHidden ? [backButtonHidden boolValue] : NO;
        if (backButtonHiddenBool) {
            viewController.navigationItem.hidesBackButton = YES;
        }
        
        NSArray *leftButtons = actionParams[@"leftButtons"];
        if (leftButtons) {
            [self setButtons:leftButtons viewController:viewController side:@"left" animated:NO];
        }
        
        NSArray *rightButtons = actionParams[@"rightButtons"];
        if (rightButtons) {
            [self setButtons:rightButtons viewController:viewController side:@"right" animated:NO];
        }
        
        NSArray *previewActions = actionParams[@"previewActions"];
        NSString *previewViewID = actionParams[@"previewViewID"];
        if (previewViewID) {
            if ([self.topViewController isKindOfClass:[RCCViewController class]]) {
                RCCViewController *topViewController = ((RCCViewController*)self.topViewController);
                topViewController.previewController = nil;
                [topViewController.navigationController unregisterForPreviewingWithContext:topViewController.previewContext];
                viewController.previewActions = previewActions;
                viewController.previewCommit = actionParams[@"previewCommit"] ? [actionParams[@"previewCommit"] boolValue] : YES;
                NSNumber *previewHeight = actionParams[@"previewHeight"];
                if (previewHeight) {
                    viewController.preferredContentSize = CGSizeMake(viewController.view.frame.size.width, [previewHeight floatValue]);
                }
                if (topViewController.traitCollection.forceTouchCapability == UIForceTouchCapabilityAvailable) {
                    dispatch_async(RCTGetUIManagerQueue(), ^{
                        [bridge.uiManager addUIBlock:^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
                            UIView *view = viewRegistry[previewViewID];
                            topViewController.previewView = view;
                            topViewController.previewContext = [topViewController registerForPreviewingWithDelegate:(id)topViewController sourceView:view];
                        }];
                    });
                    topViewController.previewController = viewController;
                }
                return;
            }
        }
        
        NSString *animationType = actionParams[@"animationType"];
        if ([animationType isEqualToString:@"fade"]) {
            CATransition *transition = [CATransition animation];
            transition.duration = 0.25;
            transition.type = kCATransitionFade;
            
            [self.view.layer addAnimation:transition forKey:kCATransition];
            [self pushViewController:viewController animated:NO];
        } else {
            [self pushViewController:viewController animated:animated];
        }
        return;
    }
    
    // pop
    if ([performAction isEqualToString:@"pop"]) {
        NSString *animationType = actionParams[@"animationType"];
        if ([animationType isEqualToString:@"fade"]) {
            CATransition *transition = [CATransition animation];
            transition.duration = 0.25;
            transition.type = kCATransitionFade;
            
            [self.view.layer addAnimation:transition forKey:kCATransition];
            [self popViewControllerAnimated:NO];
        } else {
            [self popViewControllerAnimated:animated];
        }
        return;
    }
    
    // popToRoot
    if ([performAction isEqualToString:@"popToRoot"]) {
        NSString *animationType = actionParams[@"animationType"];
        if ([animationType isEqualToString:@"fade"]) {
            CATransition *transition = [CATransition animation];
            transition.duration = 0.25;
            transition.type = kCATransitionFade;
            
            [self.view.layer addAnimation:transition forKey:kCATransition];
            [self popToRootViewControllerAnimated:NO];
        } else {
            [self popToRootViewControllerAnimated:animated];
        }
        return;
    }
    
    // resetTo
    if ([performAction isEqualToString:@"resetTo"]) {
        NSArray<UIViewController *> *viewControllers;
        
        NSString *component = actionParams[@"component"];
        NSArray<NSDictionary *> *componentConfigs = actionParams[@"components"];
        if (component) {
            NSMutableDictionary *passProps = [actionParams[@"passProps"] mutableCopy];
            passProps[@"commandType"] = @"resetTo";
            NSDictionary *style = actionParams[@"style"];
            NSArray *leftButtons = actionParams[@"leftButtons"];
            NSArray *rightButtons = actionParams[@"rightButtons"];
            
            UIViewController *viewController = [self viewControllerWithComponent:component
                                                                           props:[passProps copy]
                                                                           style:style
                                                                     leftButtons:leftButtons
                                                                    rightButtons:rightButtons
                                                                          bridge:bridge];
            
            NSDictionary *navigatorStyle = actionParams[@"style"];
            [self processTitleView:viewController
                             props:actionParams
                             style:navigatorStyle];
            
            viewControllers = @[viewController];
        } else if (componentConfigs) {
            NSMutableArray *mutableViewControllers = [NSMutableArray arrayWithCapacity:[componentConfigs count]];
            [componentConfigs enumerateObjectsUsingBlock:^(NSDictionary * _Nonnull config, NSUInteger idx, BOOL * _Nonnull stop) {
                NSString *component = config[@"component"];
                
                NSMutableDictionary *props = [config[@"passProps"] mutableCopy];
                props[@"commandType"] = @"resetTo";
                NSDictionary *style = config[@"style"];
                NSArray *leftButtons = config[@"leftButtons"];
                NSArray *rightButtons = config[@"rightButtons"];
                
                UIViewController *viewController = [self viewControllerWithComponent:component
                                                                               props:[props copy]
                                                                               style:style
                                                                         leftButtons:leftButtons
                                                                        rightButtons:rightButtons
                                                                              bridge:bridge];
                
                [self processTitleView:viewController
                                 props:actionParams
                                 style:style];
                
                [mutableViewControllers addObject:viewController];
            }];
            viewControllers = [mutableViewControllers copy];
        }
        
        if (!viewControllers) return;
        
        BOOL animated = actionParams[@"animated"] ? [actionParams[@"animated"] boolValue] : YES;
        
        NSString *animationType = actionParams[@"animationType"];
        if ([animationType isEqualToString:@"fade"]) {
            CATransition *transition = [CATransition animation];
            transition.duration = 0.25;
            transition.type = kCATransitionFade;
            
            [self.view.layer addAnimation:transition forKey:kCATransition];
            [self setViewControllers:viewControllers animated:NO];
        } else {
            [self setViewControllers:viewControllers animated:animated];
        }
        return;
    }
    
    // setButtons
    if ([performAction isEqualToString:@"setButtons"]) {
        NSArray *buttons = actionParams[@"buttons"];
        BOOL animated = actionParams[@"animated"] ? [actionParams[@"animated"] boolValue] : YES;
        NSString *side = actionParams[@"side"] ? actionParams[@"side"] : @"left";
        
        [self setButtons:buttons viewController:self.topViewController side:side animated:animated];
        return;
    }
    
    // setTitle
    if ([performAction isEqualToString:@"setTitle"] || [performAction isEqualToString:@"setTitleImage"]) {
        NSDictionary *navigatorStyle = actionParams[@"style"];
        [self processTitleView:self.topViewController
                         props:actionParams
                         style:navigatorStyle];
        return;
    }
    
    // toggleNavBar
    if ([performAction isEqualToString:@"setHidden"]) {
        NSNumber *animated = actionParams[@"animated"];
        BOOL animatedBool = animated ? [animated boolValue] : YES;
        
        NSNumber *setHidden = actionParams[@"hidden"];
        BOOL isHiddenBool = setHidden ? [setHidden boolValue] : NO;
        
        RCCViewController *topViewController = ((RCCViewController*)self.topViewController);
        topViewController.navigatorStyle[@"navBarHidden"] = setHidden;
        [topViewController setNavBarVisibilityChange:animatedBool];
        
    }
    
    // setStyle
    if ([performAction isEqualToString:@"setStyle"]) {
        
        NSDictionary *navigatorStyle = actionParams;
        
        // merge the navigatorStyle of our parent
        if ([self.topViewController isKindOfClass:[RCCViewController class]]) {
            RCCViewController *parent = (RCCViewController*)self.topViewController;
            NSMutableDictionary *mergedStyle = [NSMutableDictionary dictionaryWithDictionary:parent.navigatorStyle];
            
            // there are a few styles that we don't want to remember from our parent (they should be local)
            [mergedStyle setValuesForKeysWithDictionary:navigatorStyle];
            navigatorStyle = mergedStyle;
            
            parent.navigatorStyle = navigatorStyle;
            
            [parent setStyleOnInit];
            [parent updateStyle];
        }
    }
}

- (UIViewController *)viewControllerWithComponent:(NSString *)component
                                            props:(NSDictionary *)props
                                            style:(NSDictionary *)style
                                      leftButtons:(NSArray<NSDictionary *> *)leftButtons
                                     rightButtons:(NSArray<NSDictionary *> *)rightButtons
                                           bridge:(RCTBridge *)bridge {
    RCCViewController *viewController = [[RCCViewController alloc] initWithComponent:component
                                                                           passProps:props
                                                                      navigatorStyle:style
                                                                         globalProps:nil
                                                                              bridge:bridge];
    viewController.controllerId = props[@"screenInstanceID"];
    
    viewController.navigationItem.hidesBackButton = YES;
    
    [self processTitleView:viewController
                     props:props
                     style:style];
    
    if (leftButtons) {
        [self setButtons:leftButtons viewController:viewController side:@"left" animated:NO];
    }
    
    if (rightButtons) {
        [self setButtons:rightButtons viewController:viewController side:@"right" animated:NO];
    }
    
    return viewController;
}

-(void)onButtonPress:(UIBarButtonItem*)barButtonItem {
    NSString *callbackId = objc_getAssociatedObject(barButtonItem, &CALLBACK_ASSOCIATED_KEY);
    if (!callbackId) return;
    NSString *buttonId = objc_getAssociatedObject(barButtonItem, &CALLBACK_ASSOCIATED_ID);
    [[[RCCManager sharedInstance] getBridge].eventDispatcher sendAppEventWithName:callbackId body:@
     {
         @"type": @"NavBarButtonPress",
         @"id": buttonId ? buttonId : [NSNull null]
     }];
}

-(void)setButtons:(NSArray*)buttons viewController:(UIViewController*)viewController side:(NSString*)side animated:(BOOL)animated {
    NSMutableArray *barButtonItems = [NSMutableArray new];
    for (NSDictionary *button in buttons) {
        NSString *title = button[@"title"];
        UIImage *iconImage = nil;
        id icon = button[@"icon"];
        if (icon) iconImage = [RCTConvert UIImage:icon];
        NSString *__nullable component = button[@"component"];
        NSString *__nullable systemItemName = button[@"systemItem"];
        UIBarButtonSystemItem systemItem = [RCTConvert UIBarButtonSystemItem:systemItemName];
        
        UIBarButtonItem *barButtonItem;
        if (iconImage) {
            barButtonItem = [[UIBarButtonItem alloc] initWithImage:iconImage style:UIBarButtonItemStylePlain target:self action:@selector(onButtonPress:)];
        }
        else if (title) {
            barButtonItem = [[UIBarButtonItem alloc] initWithTitle:title style:UIBarButtonItemStylePlain target:self action:@selector(onButtonPress:)];
            
            NSMutableDictionary *buttonTextAttributes = [RCTHelpers textAttributesFromDictionary:button withPrefix:@"button"];
            if (buttonTextAttributes.allKeys.count > 0) {
                [barButtonItem setTitleTextAttributes:buttonTextAttributes forState:UIControlStateNormal];
                [barButtonItem setTitleTextAttributes:buttonTextAttributes forState:UIControlStateHighlighted];
            }
        } else if (component) {
            RCTBridge *bridge = [[RCCManager sharedInstance] getBridge];
            barButtonItem = [[RCCCustomBarButtonItem alloc] initWithComponentName:component passProps:button[@"passProps"] bridge:bridge];
        } else if (systemItemName) {
            barButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:systemItem target:self action:@selector(onButtonPress:)];
        } else continue;
        objc_setAssociatedObject(barButtonItem, &CALLBACK_ASSOCIATED_KEY, button[@"onPress"], OBJC_ASSOCIATION_RETAIN_NONATOMIC);
        [barButtonItems addObject:barButtonItem];
        
        NSString *buttonId = button[@"id"];
        if (buttonId) {
            objc_setAssociatedObject(barButtonItem, &CALLBACK_ASSOCIATED_ID, buttonId, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
        }
        
        NSNumber *disabled = button[@"disabled"];
        BOOL disabledBool = disabled ? [disabled boolValue] : NO;
        if (disabledBool) {
            [barButtonItem setEnabled:NO];
        }
        
        NSNumber *disableIconTintString = button[@"disableIconTint"];
        BOOL disableIconTint = disableIconTintString ? [disableIconTintString boolValue] : NO;
        if (disableIconTint) {
            [barButtonItem setImage:[barButtonItem.image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
        }
        
        if ([viewController isKindOfClass:[RCCViewController class]]) {
            RCCViewController *rccViewController = ((RCCViewController*)viewController);
            NSDictionary *navigatorStyle = rccViewController.navigatorStyle;
            id disabledButtonColor = navigatorStyle[@"disabledButtonColor"];
            if (disabledButtonColor) {
                UIColor *color = [RCTConvert UIColor:disabledButtonColor];
                [barButtonItem setTitleTextAttributes:@{NSForegroundColorAttributeName : color} forState:UIControlStateDisabled];
            }
        }
        
        NSString *testID = button[@"testID"];
        if (testID) {
            barButtonItem.accessibilityIdentifier = testID;
        }
    }
    
    if ([side isEqualToString:@"left"]) {
        [viewController.navigationItem setLeftBarButtonItems:barButtonItems animated:animated];
    }
    
    if ([side isEqualToString:@"right"]) {
        [viewController.navigationItem setRightBarButtonItems:barButtonItems animated:animated];
    }
}


-(void)processTitleView:(UIViewController*)viewController
                  props:(NSDictionary*)props
                  style:(NSDictionary*)style {
    BOOL isSetSubtitleBool = props[@"isSetSubtitle"] ? [props[@"isSetSubtitle"] boolValue] : NO;
    RCCTitleViewHelper *titleViewHelper = [[RCCTitleViewHelper alloc] init:viewController
                                                      navigationController:self
                                                                     title:props[@"title"]
                                                                  subtitle:props[@"subtitle"]
                                                            titleImageData:props[@"titleImage"]
                                                             isSetSubtitle:isSetSubtitleBool];
    
    [titleViewHelper setup:style];
    
}

- (UIStatusBarStyle)preferredStatusBarStyle {
    return [self.topViewController preferredStatusBarStyle];
}

- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated {
    if (_transitioning) {
        NSDictionary *pushDetails =@{ @"viewController": viewController, @"animated": @(animated) };
        [_queuedViewControllers addObject:pushDetails];
        
        return;
    }
    
    _transitioning = YES;
    
    [super pushViewController:viewController animated:animated];
}


#pragma mark - UINavigationControllerDelegate


-(void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated {
    [viewController setNeedsStatusBarAppearanceUpdate];
}

- (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated {
    dispatch_async(dispatch_get_main_queue(), ^{
        _transitioning = NO;
        if ([_queuedViewControllers count] > 0) {
            NSDictionary *toPushDetails = [_queuedViewControllers firstObject];
            [_queuedViewControllers removeObjectAtIndex:0];
            [self pushViewController:toPushDetails[@"viewController"] animated:[toPushDetails[@"animated"] boolValue]];
        }
    });
}


@end