//
//  NGAConditionalExecutor.m
//  P4Menu
//
//  Created by Michael Bishop on 9/29/11.
//  Copyright 2011 __MyCompanyName__. All rights reserved.
//

#import "NGAConditionalExecutor.h"
#import "NGAUtilities.h"

@interface NGAConditionalExecutor ()

-(NSDictionary*)currentDictionaryWithValues;

@end

@implementation NGAConditionalExecutor

+(id)executorWithConditionalKeyPaths:(NSArray*)keypaths object:(id)object
{
    return AUTORELEASE([[NGAConditionalExecutor alloc] initWithConditionalKeyPaths:keypaths object:object]);
}

-(id)init
{
    return [self initWithConditionalKeyPaths:nil object:nil];
}

- (id)initWithConditionalKeyPaths:(NSArray*)keypaths object:(id)object
{
    if ((self = [super init]) == nil)
        return nil;
    
    _keypaths = [keypaths copy];
    _object = object;
    _values = [[self currentDictionaryWithValues] copy];  

    return self;
}

#if !__has_feature(objc_arc)

-(void)dealloc
{
    [_values release];
    [_keypaths release];
    [super dealloc];
}
#endif

-(NSDictionary*)currentDictionaryWithValues
{
    return [_object dictionaryWithValuesForKeys:_keypaths];
}

-(BOOL)conditionallyExecuteBlock:(void(^)())block
{
    if ( ![_values isEqualToDictionary:[self currentDictionaryWithValues]] )
        return NO;
    block();
    return YES;
}

@end