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106 lines (87 loc) · 2.31 KB
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//
// AddressHelper.m
// BitStore
//
// Created by Dylan Marriott on 08.02.14.
// Copyright (c) 2014 Dylan Marriott. All rights reserved.
//
#import "AddressHelper.h"
#import "UserDefaults.h"
#import "Address.h"
#import "AddressHelperListener.h"
#import "AddressListener.h"
#import <DMListener/DMListener.h>
@interface AddressHelper () <AddressListener>
@end
@implementation AddressHelper {
DMListeners* _listeners;
NSMutableArray* _addresses;
}
static AddressHelper* sharedHelper;
+ (void)initialize {
[super initialize];
sharedHelper = [[AddressHelper alloc] init];
}
+ (AddressHelper *)instance {
return sharedHelper;
}
- (id)init {
if (self = [super init]) {
[self loadState];
_listeners = [[DMListeners alloc] init];
}
return self;
}
- (NSArray *)addresses {
return _addresses;
}
- (Address *)defaultAddress {
if (_addresses.count == 0) {
return nil;
}
if ([UserDefaults instance].defaultAddressIndex > _addresses.count - 1) {
[UserDefaults instance].defaultAddressIndex = _addresses.count - 1;
}
return [_addresses objectAtIndex:[UserDefaults instance].defaultAddressIndex];
}
- (void)setDefaultAddress:(NSInteger)index {
[UserDefaults instance].defaultAddressIndex = index;
[self notifyListeners];
}
#pragma mark - Add / Remove
- (void)addAddress:(Address *)address {
[_addresses addObject:address];
[self storeState];
}
- (void)removeAddress:(Address *)address {
[_addresses removeObject:address];
[self storeState];
}
#pragma mark - Listener
- (void)addAddressHelperListener:(id<AddressHelperListener>)listener {
[_listeners addListener:listener];
[listener defaultAddressChanged:[self defaultAddress]];
}
- (NSArray *)listeners {
return _listeners.listeners;
}
- (void)notifyListeners {
[_listeners notifyListeners:^(id<AddressHelperListener> listener) {
[listener defaultAddressChanged:[self defaultAddress]];
}];
}
#pragma mark - Storage
- (void)storeState {
[UserDefaults instance].addresses = _addresses;
}
- (void)loadState {
_addresses = [NSMutableArray arrayWithArray:[UserDefaults instance].addresses];
for (Address* addr in _addresses) {
[addr addAddressListener:self];
}
}
#pragma mark - AddressDelegate
- (void)addressChanged:(Address *)address {
[self storeState];
}
@end