JUCE NSURL Utilities

NSURLUtils.h

#pragma once
#include <JuceHeader.h>

#if JUCE_IOS

class NSURLUtils
{
public:
    static URL URLfromBookmark (void* bookmark);
    static void* bookmarkFromURL (URL& url);
    static String lastKnownPathFromBookmark (void* bookmark);
};

#endif

NSURLUtils.mm

#import <Foundation/Foundation.h>
#include "NSURLUtils.h"
#define NSURLPathKey @"_NSURLPathKey"

URL NSURLUtils::URLfromBookmark (void* bookmarkData)
{
    NSData* bookmark = static_cast<NSData*> (bookmarkData);
    BOOL isBookmarkStale = false;
    NSError* error = nil;

    auto nsURL = [NSURL URLByResolvingBookmarkData:bookmark
                                           options:0
                                     relativeToURL:nil
                               bookmarkDataIsStale:&isBookmarkStale
                                             error:&error];

    if (error == nil)
    {
        auto urlString = String([[nsURL absoluteString] UTF8String]);
        URL url (urlString);
        return url;
    }

    auto desc = [error localizedDescription];
    ignoreUnused(desc);
    DBG ([desc UTF8String]);
    //jassertfalse;
    return URL();
}

void* NSURLUtils::bookmarkFromURL (URL& url)
{
    if (NSData* bookmark = (NSData*) getURLBookmark (url))
    {
        BOOL isBookmarkStale = false;
        NSError* error = nil;

        auto nsURL = [NSURL URLByResolvingBookmarkData:bookmark
                                               options:0
                                         relativeToURL:nil
                                   bookmarkDataIsStale:&isBookmarkStale
                                                 error:&error];

        if (error == nil)
        {
            bool securityAccessSucceeded = [nsURL startAccessingSecurityScopedResource];

            NSError* error = nil;

            NSData* updatedBookmark = [nsURL bookmarkDataWithOptions:NSURLBookmarkCreationSuitableForBookmarkFile
                                      includingResourceValuesForKeys:nil
                                                       relativeToURL:nil
                                                               error:&error];

            if (securityAccessSucceeded)
                [nsURL stopAccessingSecurityScopedResource];

            if (error == nil)
                return updatedBookmark;
            else
                jassertfalse;

        }
    }
}

String NSURLUtils::lastKnownPathFromBookmark (void* bookmarkData)
{
    NSDictionary *values = [NSURL resourceValuesForKeys:@[NSURLPathKey]
                                       fromBookmarkData:static_cast<NSData*> (bookmarkData)];

    NSString *path = [values objectForKey:NSURLPathKey];
    return String([path UTF8String]);
}