date/ios.mm

//
//  ios.cpp
//  DateTimeLib
//
// The MIT License (MIT)
//
// Copyright (c) 2016 Alexander Kormanovsky
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

#if HAS_IOS

#include "ios.h"
#include "NVHTarGzip.h"

namespace date
{
namespace iOSUtils
{
    
std::string
get_tzdata_path()
{
    static NSString *result = @"";
    NSFileManager *manager = [NSFileManager defaultManager];
    static dispatch_once_t onceToken;
    
    dispatch_once(&onceToken,
    ^{
        NSArray *paths = [NSBundle pathsForResourcesOfType:@"tar.gz"
                                          inDirectory:[[NSBundle mainBundle] bundlePath]];
        
        if (paths.count != 0)
        {
            NSString *archivePath = paths[0];
            NSURL *docsURL = [[[NSFileManager defaultManager]
                               URLsForDirectory:NSDocumentDirectory
                               inDomains:NSUserDomainMask] lastObject];
            
            NSString *path = [[docsURL URLByAppendingPathComponent:@"tzdata"] path];
            
            if ([manager fileExistsAtPath:path])
            {
                result = path;
                return;
            }
            
            [manager createDirectoryAtPath:path withIntermediateDirectories:NO
                     attributes:nil error:nil];
            
            NSError *error;
            
            [[NVHTarGzip sharedInstance] unTarGzipFileAtPath:archivePath
                                         toPath:path error:&error];
            
            if (error != nil)
            {
                NSLog(@"%s Error extracting %@", __func__, error);
            }
            else
            {
                result = path;
            }
            
        }
    });
    
    return [result UTF8String];
}

}  // namespace iOSUtils
}  // namespace date

#endif