NMDefaults.h

//
//  NMDefaults.h
//  nmlib
//
//  Created by Nicholas Moore on 21/12/2023.
//

#import <Foundation/Foundation.h>

NS_ASSUME_NONNULL_BEGIN

@interface NMDefaults : NSObject
+ (NSUserDefaults *)defaults;
+ (NSUserDefaultsController *)defaultsController;
@end

NS_ASSUME_NONNULL_END

NMDefaults.m

//
//  NMDefaults.m
//  nmlib
//
//  Created by Nicholas Moore on 21/12/2023.
//

#import "NMDefaults.h"

static NSUserDefaults *_defaults=nil;
static NSUserDefaultsController *_defaultsController=nil;

@implementation NMDefaults

+ (void)initialize
{
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        // suite name is typically the "parent" (non-setapp) bundle id e.g. com.pilotmoon.popclip
        NSString *suiteName=[[NSBundle mainBundle] objectForInfoDictionaryKey:@"NMDefaultsSuiteName"]; 
        NSString *bundleId=[[NSBundle mainBundle] objectForInfoDictionaryKey:(NSString *)kCFBundleIdentifierKey];
        if (![suiteName isKindOfClass:[NSString class]]||[suiteName isEqualToString:bundleId]) {
            _defaults=[[NSUserDefaults alloc] initWithSuiteName:nil];
        }
        else {
            _defaults=[[NSUserDefaults alloc] initWithSuiteName:suiteName];
        }
        _defaultsController=[[NSUserDefaultsController alloc] initWithDefaults:_defaults initialValues:nil];
    });
}

+ (NSUserDefaults *)defaults {
    return _defaults;
}

+ (NSUserDefaultsController *)defaultsController {
    return _defaultsController;
}

@end