//
//  RNGestureHandlerRegistry.m
//  RNGestureHandler
//
//  Created by Krzysztof Magiera on 12/10/2017.
//  Copyright © 2017 Software Mansion. All rights reserved.
//

#import "GestureHandlerRegistry.h"


@implementation GestureHandlerRegistry {
    NSMutableDictionary<NSNumber *, GestureHandler *> *_handlers;
}

- (instancetype)init
{
    if ((self = [super init])) {
        _handlers = [NSMutableDictionary new];
    }
    return self;
}

- (GestureHandler *)handlerWithTag:(NSNumber *)handlerTag
{
    return _handlers[handlerTag];
}

- (void)registerGestureHandler:(GestureHandler *)gestureHandler
{
 if ([_handlers objectForKey:gestureHandler.tag] == nil) { 
    _handlers[gestureHandler.tag] = gestureHandler;
 }
}

- (void)attachHandlerWithTag:(NSNumber *)handlerTag toView:(UIView *)view
{
    GestureHandler *handler = _handlers[handlerTag];
    NSAssert(handler != nil, @"Handler for tag %@ does not exists", handlerTag);
    [handler unbindFromView];
    [handler bindToView:view];
}

- (void)dropHandlerWithTag:(NSNumber *)handlerTag
{
    GestureHandler *handler = _handlers[handlerTag];
    [handler unbindFromView];
    [_handlers removeObjectForKey:handlerTag];
}

@end