IAPHelper.m

//
//  IAPHelper.m
//  zen180
//
//  Created by iosninjamaster on 8/7/14.
//  Copyright (c) 2014 urbndna. All rights reserved.
//

// 1
#import "IAPHelper.h"
#import <StoreKit/StoreKit.h>
#import "Zen180_IAP_Helper.h"
#import "IAPHelper.h"
// 2
@interface IAPHelper () <SKProductsRequestDelegate>
@end

NSString *const IAPHelperProductPurchasedNotification = @"IAPHelperProductPurchasedNotification";

@implementation IAPHelper

{
    
}


- (id)initWithProductIdentifiers:(NSSet *)productIdentifiers {
    
    if ((self = [super init])) {
        __typeof(self) __weak weakSelf = self;
        
        [[SKPaymentQueue defaultQueue] addTransactionObserver:weakSelf];
        
        // Store product identifiers
        _productIdentifiers = productIdentifiers;
        
        // Check for previously purchased products
        _purchasedProductIdentifiers = [NSMutableSet set];
        for (NSString * productIdentifier in _productIdentifiers)
        {
            BOOL productPurchased = [[NSUserDefaults standardUserDefaults] boolForKey:productIdentifier];
            if (productPurchased)
            {
                [_purchasedProductIdentifiers addObject:productIdentifier];
                NSLog(@"Previously purchased: %@", productIdentifier);
            } else {
                NSLog(@"Not purchased: %@", productIdentifier);
            }
        }
        
    }
    return self;
}

- (void)requestProductsWithCompletionHandler:(RequestProductsCompletionHandler)completionHandler {
    
    //__typeof(completionHandler) __weak weakCompletionHandler = completionHandler;
    //_completionHandler = weakCompletionHandler;
    
    _completionHandler = [completionHandler copy];
    // 2
    _productsRequest = [[SKProductsRequest alloc] initWithProductIdentifiers:_productIdentifiers];
    NSLog(@"_productIdentifiers = %@", _productIdentifiers);
    _productsRequest.delegate = self;
    [_productsRequest start];

}

#pragma mark - SKProductsRequestDelegate

- (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response {
    
    NSLog(@"Loaded list of products...");
    _productsRequest = nil;
    
    NSArray * skProducts = response.products;
    for (SKProduct * skProduct in skProducts)
    {
        NSLog(@"Found product: %@ %@ %0.2f",
              skProduct.productIdentifier,
              skProduct.localizedTitle,
              skProduct.price.floatValue);
    }
    
    _completionHandler(YES, skProducts);
    _completionHandler = nil;
}

- (void)request:(SKRequest *)request didFailWithError:(NSError *)error {
    
    NSLog(@"Failed to load list of products.");
    NSLog(@"Error = %@", error);
    _productsRequest = nil;
    
    _completionHandler(NO, nil);
    _completionHandler = nil;
    NSLog(@"hellor");
    
}

- (BOOL)productPurchased:(NSString *)productIdentifier
{
    return [_purchasedProductIdentifiers containsObject:productIdentifier];
}

- (void)buyProduct:(SKProduct *)product
{
    NSLog(@"Buying %@...", product.productIdentifier);
    
    SKPayment *payment = [SKPayment paymentWithProduct:product];
    [[SKPaymentQueue defaultQueue] addPayment:payment];
}

- (void)completeTransaction:(SKPaymentTransaction *)transaction {
    NSLog(@"completeTransaction...");
    
    [self provideContentForProductIdentifier:transaction.payment.productIdentifier];
    [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
}

- (void)restoreTransaction:(SKPaymentTransaction *)transaction {
    NSLog(@"restoreTransaction...");
    
    [self provideContentForProductIdentifier:transaction.originalTransaction.payment.productIdentifier];
    [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
}

- (void)failedTransaction:(SKPaymentTransaction *)transaction {
    
    NSLog(@"failedTransaction...");
    if (transaction.error.code != SKErrorPaymentCancelled)
    {
        NSLog(@"Transaction error: %@", transaction.error.localizedDescription);
    }
    
    [[SKPaymentQueue defaultQueue] finishTransaction: transaction];
}

- (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions
{
    for (SKPaymentTransaction * transaction in transactions) {
        NSLog(@"transactions = %@", transactions);
        switch (transaction.transactionState)
        {
            case SKPaymentTransactionStatePurchased:
                [self completeTransaction:transaction];
                break;
            case SKPaymentTransactionStateFailed:
                [self failedTransaction:transaction];
                break;
            case SKPaymentTransactionStateRestored:
                [self restoreTransaction:transaction];
                
            default:
                break;
        }
    };
}

- (void)provideContentForProductIdentifier:(NSString *)productIdentifier {
    
    [_purchasedProductIdentifiers addObject:productIdentifier];
    [[NSUserDefaults standardUserDefaults] setBool:YES forKey:productIdentifier];
    [[NSUserDefaults standardUserDefaults] synchronize];
    [[NSNotificationCenter defaultCenter] postNotificationName:IAPHelperProductPurchasedNotification object:productIdentifier userInfo:nil];
    
}

- (void)paymentQueue:(SKPaymentQueue *)queue restoreCompletedTransactionsFailedWithError:(NSError *)error
{
    NSLog(@"queue = %@", queue);
    NSLog(@"error = %@", error);
}

- (void)paymentQueueRestoreCompletedTransactionsFinished:(SKPaymentQueue *)queue
{
    NSLog(@"queue = %@", queue);
}

- (void)restoreCompletedTransactions
{
    [[SKPaymentQueue defaultQueue] restoreCompletedTransactions];
}

- (void)dealloc
{
    _productIdentifiers = nil;
    _productsRequest.delegate = nil;
    _purchasedProductIdentifiers = nil;
    [[SKPaymentQueue defaultQueue] removeTransactionObserver:self];
}

@end