Short links to the App Store for your apps and company

NSString+AppStore.h

//
//  NSString+AppStore.h
//  NSString+Additions
//
//  Created by Darcy Liu on 11/5/14.
//  Copyright (c) 2014 Darcy Liu. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface NSString (AppStore)
+ (NSString *)standardAppStoreLinkByAppleID:(NSString *)appleID;
+ (NSString *)appStoreLinkByAppleID:(NSString *)appleID;
+ (NSString *)appStoreLinkByCompanyName:(NSString *)companyName;
+ (NSString *)appStoreLinkByAppName:(NSString *)appName;
+ (NSString *)appStoreLinkApp:(NSString *)appName byCompany:(NSString *)companyName;

+ (void)appStoreLinksTest;
@end

NSString+AppStore.m

//
//  NSString+AppStore.m
//  NSString+Additions
//
//  Created by Darcy Liu on 11/5/14.
//  Copyright (c) 2014 Darcy Liu. All rights reserved.
//

#import "NSString+AppStore.h"

// via https://developer.apple.com/library/ios/qa/qa1633/_index.html

#define IOS_APP_STORE_URL @"http://appstore.com/%@"
#define MAC_APP_STORE_URL @"http://appstore.com/mac/%@"

@implementation NSString (AppStore)
- (NSString *)as_stringByAccentRemoved
{
    NSData *asciiEncoded = [self dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
    
    return [[NSString alloc] initWithData:asciiEncoded encoding:NSASCIIStringEncoding];
}

- (NSString *)as_cleanStringForAppStore
{
    NSMutableCharacterSet *mutableCharacterSet = [NSMutableCharacterSet whitespaceAndNewlineCharacterSet];
    [mutableCharacterSet formUnionWithCharacterSet:[NSCharacterSet punctuationCharacterSet]];
    [mutableCharacterSet formUnionWithCharacterSet:[NSCharacterSet characterSetWithCharactersInString:@"©™®"]];
    NSString *cleanString = [[self lowercaseString] stringByReplacingOccurrencesOfString:@"&" withString:@"and"];
    NSArray *components =[[cleanString lowercaseString] componentsSeparatedByCharactersInSet:mutableCharacterSet];
    cleanString = [[components componentsJoinedByString:@""] as_stringByAccentRemoved];
    return cleanString;
}

// via https://linkmaker.itunes.apple.com/us/
+ (NSString *)standardAppStoreLinkByAppleID:(NSString *)appleID
{
    NSParameterAssert(appleID);
    return [NSString stringWithFormat:@"https://itunes.apple.com/us/app/id%@?mt=8",appleID];
}

+ (NSString *)appStoreLinkByAppleID:(NSString *)appleID
{
    NSParameterAssert(appleID);
    return [NSString stringWithFormat:@"https://itunes.apple.com/app/id%@",appleID];
}

+ (NSString *)appStoreLinkByCompanyName:(NSString *)companyName
{
    NSParameterAssert(companyName);
#if TARGET_OS_IPHONE
    return [NSString stringWithFormat:IOS_APP_STORE_URL,[companyName as_cleanStringForAppStore]];
#else
    return [NSString stringWithFormat:MAC_APP_STORE_URL,[companyName as_cleanStringForAppStore]];
#endif
}

+ (NSString *)appStoreLinkByAppName:(NSString *)appName
{
    NSParameterAssert(appName);
#if TARGET_OS_IPHONE
    return [NSString stringWithFormat:IOS_APP_STORE_URL,[appName as_cleanStringForAppStore]];
#else
    return [NSString stringWithFormat:MAC_APP_STORE_URL,[appName as_cleanStringForAppStore]];
#endif
}

+ (NSString *)appStoreLinkApp:(NSString *)appName byCompany:(NSString *)companyName
{
    NSParameterAssert(appName);
    NSParameterAssert(companyName);
#if TARGET_OS_IPHONE
    return [NSString stringWithFormat:@"http://appstore.com/%@/%@",[companyName as_cleanStringForAppStore],[appName as_cleanStringForAppStore]];
#else
    return [NSString stringWithFormat:@"http://appstore.com/mac/%@/%@",[companyName as_cleanStringForAppStore],[appName as_cleanStringForAppStore]];
#endif
}

+ (void)appStoreLinksTest
{
#if TARGET_OS_IPHONE
    NSAssert([[NSString standardAppStoreLinkByAppleID:@"361285480"] isEqualToString:@"https://itunes.apple.com/us/app/id361285480?mt=8"],@"https://itunes.apple.com/us/app/id361285480?mt=8");
    NSAssert([[NSString appStoreLinkByAppleID:@"361285480"] isEqualToString:@"https://itunes.apple.com/app/id361285480"],@"https://itunes.apple.com/app/id361285480");
    NSAssert([[NSString appStoreLinkByCompanyName:@"Gameloft"] isEqualToString:@"http://appstore.com/gameloft"], @"Gameloft");
    NSAssert([[NSString appStoreLinkByCompanyName:@"Activision Publishing, Inc."] isEqualToString:@"http://appstore.com/activisionpublishinginc"], @"Activision Publishing, Inc.");
    NSAssert([[NSString appStoreLinkByCompanyName:@"Chen's Photography & Software"] isEqualToString:@"http://appstore.com/chensphotographyandsoftware"], @"Chen's Photography & Software");

    NSAssert([[NSString appStoreLinkByAppName:@"Ocarina"] isEqualToString:@"http://appstore.com/ocarina"], @"Ocarina");
    NSAssert([[NSString appStoreLinkByAppName:@"Where’s My Perry?"] isEqualToString:@"http://appstore.com/wheresmyperry"], @"Where’s My Perry?");
    NSAssert([[NSString appStoreLinkByAppName:@"Brain Challenge™"] isEqualToString:@"http://appstore.com/brainchallenge"], @"Brain Challenge™");
#endif
}

@end