A minimal Unity Native Plugin for iOS.

MinimalUnityIos.mm

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import <CoreTelephony/CTCarrier.h>
#import <CoreTelephony/CTTelephonyNetworkInfo.h>
#import "UnityInterface.h"

// Required to return strings to Unity
char* cStringCopy(const char* string)
{
    if (string == NULL)
    {
        return NULL;
    }
    char* res = (char*)malloc(strlen(string) + 1);
    strcpy(res, string);
    return res;
}

static uint64_t const THIRTY_MEGA_IN_BYTES = 30 * 1048576;

extern "C" {
    
    bool availableFileSystemSpace() {
        uint64_t totalSpace = 0;
        uint64_t totalFreeSpace = THIRTY_MEGA_IN_BYTES;
        
        __autoreleasing NSError *error = nil;
        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSDictionary *dictionary = [[NSFileManager defaultManager] attributesOfFileSystemForPath:[paths lastObject] error: &error];
        
        if (dictionary)
        {
            NSNumber *fileSystemSizeInBytes = [dictionary objectForKey: NSFileSystemSize];
            NSNumber *freeFileSystemSizeInBytes = [dictionary objectForKey:NSFileSystemFreeSize];
            totalSpace = [fileSystemSizeInBytes unsignedLongLongValue];
            totalFreeSpace = [freeFileSystemSizeInBytes unsignedLongLongValue];
        }
        
        return totalFreeSpace > THIRTY_MEGA_IN_BYTES;
    }
      
    char* getDeviceName() {
        NSString* devNameString = [[UIDevice currentDevice] name];
        return cStringCopy([devNameString UTF8String]);
    }

    char* getUserLocationByNetwork() {
        CTTelephonyNetworkInfo* network_Info = [CTTelephonyNetworkInfo new];
        CTCarrier* carrier = network_Info.subscriberCellularProvider;
       
        NSString* userLocationString = carrier.isoCountryCode;
        userLocationString = [userLocationString uppercaseString];
        
        return cStringCopy([userLocationString UTF8String]);
    }
}