space-ios/iOSClient/Utility/CCUtility.m

//
//  CCUtility.m
//  Nextcloud
//
//  Created by Marino Faggiana on 02/02/16.
//  Copyright (c) 2016 Marino Faggiana. All rights reserved.
//
//  Author Marino Faggiana <marino.faggiana@nextcloud.com>
//
//  This program is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
//

#import "CCUtility.h"
#import "NCBridgeSwift.h"
#import "NSNotificationCenter+MainThread.h"
#import <OpenSSL/OpenSSL.h>
#import <CoreLocation/CoreLocation.h>
#include <sys/stat.h>


#define INTRO_MessageType       @"MessageType_"

#define E2E_certificate         @"EndToEndCertificate_"
#define E2E_PrivateKey          @"EndToEndPrivateKey_"
#define E2E_Passphrase          @"EndToEndPassphrase_"
#define E2E_PublicKey           @"EndToEndPublicKeyServer_"

@implementation CCUtility

#pragma --------------------------------------------------------------------------------------------
#pragma mark ======================= KeyChainStore ==================================
#pragma --------------------------------------------------------------------------------------------

+ (void)deleteAllChainStore
{
    [UICKeyChainStore removeAllItems];
    [UICKeyChainStore removeAllItemsForService:NCGlobal.shared.serviceShareKeyChain];
}

#pragma ------------------------------ GET/SET

+ (BOOL)getActivityVerboseHigh
{
    return [[UICKeyChainStore stringForKey:@"activityVerboseHigh" service:NCGlobal.shared.serviceShareKeyChain] boolValue];
}

+ (void)setActivityVerboseHigh:(BOOL)high
{
    NSString *sHigh = (high) ? @"true" : @"false";
    [UICKeyChainStore setString:sHigh forKey:@"activityVerboseHigh" service:NCGlobal.shared.serviceShareKeyChain];
}

+ (BOOL)getShowHiddenFiles
{
    return [[UICKeyChainStore stringForKey:@"showHiddenFiles" service:NCGlobal.shared.serviceShareKeyChain] boolValue];
}

+ (void)setShowHiddenFiles:(BOOL)show
{
    NSString *sShow = (show) ? @"true" : @"false";
    [UICKeyChainStore setString:sShow forKey:@"showHiddenFiles" service:NCGlobal.shared.serviceShareKeyChain];
}

+ (BOOL)getFormatCompatibility
{
    NSString *valueString = [UICKeyChainStore stringForKey:@"formatCompatibility" service:NCGlobal.shared.serviceShareKeyChain];

    // Default TRUE
    if (valueString == nil) {
        [self setFormatCompatibility:YES];
        return true;
    }

    return [valueString boolValue];
}

+ (void)setFormatCompatibility:(BOOL)set
{
    NSString *sSet = (set) ? @"true" : @"false";
    [UICKeyChainStore setString:sSet forKey:@"formatCompatibility" service:NCGlobal.shared.serviceShareKeyChain];
}

+ (NSString *)getEndToEndCertificate:(NSString *)account
{
    NSString *key, *certificate;

    key = [E2E_certificate stringByAppendingString:account];
    certificate = [UICKeyChainStore stringForKey:key service:NCGlobal.shared.serviceShareKeyChain];

    // OLD VERSION
    if (certificate == nil) {
        key = [@"EndToEndPublicKey_" stringByAppendingString:account];
        certificate = [UICKeyChainStore stringForKey:key service:NCGlobal.shared.serviceShareKeyChain];
    }

    return certificate;
}

+ (void)setEndToEndCertificate:(NSString *)account certificate:(NSString *)certificate
{
    NSString *key = [E2E_certificate stringByAppendingString:account];
    [UICKeyChainStore setString:certificate forKey:key service:NCGlobal.shared.serviceShareKeyChain];
}

+ (NSString *)getEndToEndPrivateKey:(NSString *)account
{
    NSString *key = [E2E_PrivateKey stringByAppendingString:account];
    return [UICKeyChainStore stringForKey:key service:NCGlobal.shared.serviceShareKeyChain];
}

+ (void)setEndToEndPrivateKey:(NSString *)account privateKey:(NSString *)privateKey
{
    NSString *key = [E2E_PrivateKey stringByAppendingString:account];
    [UICKeyChainStore setString:privateKey forKey:key service:NCGlobal.shared.serviceShareKeyChain];
}

+ (NSString *)getEndToEndPublicKey:(NSString *)account
{
    NSString *key = [E2E_PublicKey stringByAppendingString:account];
    return [UICKeyChainStore stringForKey:key service:NCGlobal.shared.serviceShareKeyChain];
}

+ (void)setEndToEndPublicKey:(NSString *)account publicKey:(NSString *)publicKey
{
    NSString *key = [E2E_PublicKey stringByAppendingString:account];
    [UICKeyChainStore setString:publicKey forKey:key service:NCGlobal.shared.serviceShareKeyChain];
}

+ (NSString *)getEndToEndPassphrase:(NSString *)account
{
    NSString *key = [E2E_Passphrase stringByAppendingString:account];
    return [UICKeyChainStore stringForKey:key service:NCGlobal.shared.serviceShareKeyChain];
}

+ (void)setEndToEndPassphrase:(NSString *)account passphrase:(NSString *)passphrase
{
    NSString *key = [E2E_Passphrase stringByAppendingString:account];
    [UICKeyChainStore setString:passphrase forKey:key service:NCGlobal.shared.serviceShareKeyChain];
}

+ (BOOL)isEndToEndEnabled:(NSString *)account
{
    NSString* versionE2EE = [[NCGlobal shared] capabilityE2EEApiVersion];

    NSString *certificate = [self getEndToEndCertificate:account];
    NSString *publicKey = [self getEndToEndPublicKey:account];
    NSString *privateKey = [self getEndToEndPrivateKey:account];
    NSString *passphrase = [self getEndToEndPassphrase:account];
            
    if (passphrase.length > 0 && privateKey.length > 0 && certificate.length > 0 && publicKey.length > 0 && [NCGlobal.shared.e2eeVersions containsObject:versionE2EE]) {
        return YES;
    } else {
        return NO;
    }
}

+ (void)clearAllKeysEndToEnd:(NSString *)account
{
    [self setEndToEndCertificate:account certificate:nil];
    [self setEndToEndPrivateKey:account privateKey:nil];
    [self setEndToEndPublicKey:account publicKey:nil];
    [self setEndToEndPassphrase:account passphrase:nil];

    // OLD
    [UICKeyChainStore setString:nil forKey:[@"EndToEndPublicKey_" stringByAppendingString:account] service:NCGlobal.shared.serviceShareKeyChain];
}

+ (BOOL)getDisableFilesApp
{
    return [[UICKeyChainStore stringForKey:@"disablefilesapp" service:NCGlobal.shared.serviceShareKeyChain] boolValue];
}

+ (void)setDisableFilesApp:(BOOL)disable
{
    NSString *sDisable = (disable) ? @"true" : @"false";
    [UICKeyChainStore setString:sDisable forKey:@"disablefilesapp" service:NCGlobal.shared.serviceShareKeyChain];
}

+ (void)setPushNotificationPublicKey:(NSString *)account data:(NSData *)data
{
    NSString *key = [@"PNPublicKey" stringByAppendingString:account];
    [UICKeyChainStore setData:data forKey:key service:NCGlobal.shared.serviceShareKeyChain];
}

+ (NSData *)getPushNotificationPublicKey:(NSString *)account
{
    NSString *key = [@"PNPublicKey" stringByAppendingString:account];
    return [UICKeyChainStore dataForKey:key service:NCGlobal.shared.serviceShareKeyChain];
}

+ (void)setPushNotificationSubscribingPublicKey:(NSString *)account publicKey:(NSString *)publicKey
{
    NSString *key = [@"PNSubscribingPublicKey" stringByAppendingString:account];
    [UICKeyChainStore setString:publicKey forKey:key service:NCGlobal.shared.serviceShareKeyChain];
}

+ (NSString *)getPushNotificationSubscribingPublicKey:(NSString *)account
{
    NSString *key = [@"PNSubscribingPublicKey" stringByAppendingString:account];
    return [UICKeyChainStore stringForKey:key service:NCGlobal.shared.serviceShareKeyChain];
}

+ (void)setPushNotificationPrivateKey:(NSString *)account data:(NSData *)data
{
    NSString *key = [@"PNPrivateKey" stringByAppendingString:account];
    [UICKeyChainStore setData:data forKey:key service:NCGlobal.shared.serviceShareKeyChain];
}

+ (NSData *)getPushNotificationPrivateKey:(NSString *)account
{
    NSString *key = [@"PNPrivateKey" stringByAppendingString:account];
    return [UICKeyChainStore dataForKey:key service:NCGlobal.shared.serviceShareKeyChain];
}

+ (void)setPushNotificationToken:(NSString *)account token:(NSString *)token
{
    NSString *key = [@"PNToken" stringByAppendingString:account];
    [UICKeyChainStore setString:token forKey:key service:NCGlobal.shared.serviceShareKeyChain];
}

+ (NSString *)getPushNotificationToken:(NSString *)account
{
    NSString *key = [@"PNToken" stringByAppendingString:account];
    return [UICKeyChainStore stringForKey:key service:NCGlobal.shared.serviceShareKeyChain];
}

+ (void)setPushNotificationDeviceIdentifier:(NSString *)account deviceIdentifier:(NSString *)deviceIdentifier
{
    NSString *key = [@"PNDeviceIdentifier" stringByAppendingString:account];
    [UICKeyChainStore setString:deviceIdentifier forKey:key service:NCGlobal.shared.serviceShareKeyChain];
}

+ (NSString *)getPushNotificationDeviceIdentifier:(NSString *)account
{
    NSString *key = [@"PNDeviceIdentifier" stringByAppendingString:account];
    return [UICKeyChainStore stringForKey:key service:NCGlobal.shared.serviceShareKeyChain];
}

+ (void)setPushNotificationDeviceIdentifierSignature:(NSString *)account deviceIdentifierSignature:(NSString *)deviceIdentifierSignature
{
    NSString *key = [@"PNDeviceIdentifierSignature" stringByAppendingString:account];
    [UICKeyChainStore setString:deviceIdentifierSignature forKey:key service:NCGlobal.shared.serviceShareKeyChain];
}

+ (NSString *)getPushNotificationDeviceIdentifierSignature:(NSString *)account
{
    NSString *key = [@"PNDeviceIdentifierSignature" stringByAppendingString:account];
    return [UICKeyChainStore stringForKey:key service:NCGlobal.shared.serviceShareKeyChain];
}

+ (void)clearAllKeysPushNotification:(NSString *)account
{
    [self setPushNotificationPublicKey:account data:nil];
    [self setPushNotificationSubscribingPublicKey:account publicKey:nil];
    [self setPushNotificationPrivateKey:account data:nil];
    [self setPushNotificationToken:account token:nil];
    [self setPushNotificationDeviceIdentifier:account deviceIdentifier:nil];
    [self setPushNotificationDeviceIdentifierSignature:account deviceIdentifierSignature:nil];
}

+ (NSInteger)getMediaWidthImage
{
    NSString *width = [UICKeyChainStore stringForKey:@"mediaWidthImage" service:NCGlobal.shared.serviceShareKeyChain];

    if (width == nil) {
        return 80;
    } else {
        return [width integerValue];
    }
}

+ (void)setMediaWidthImage:(NSInteger)width
{
    NSString *widthString = [@(width) stringValue];
    [UICKeyChainStore setString:widthString forKey:@"mediaWidthImage" service:NCGlobal.shared.serviceShareKeyChain];
}

+ (BOOL)getDisableCrashservice
{
    return [[UICKeyChainStore stringForKey:@"crashservice" service:NCGlobal.shared.serviceShareKeyChain] boolValue];
}

+ (void)setDisableCrashservice:(BOOL)disable
{
    NSString *sDisable = (disable) ? @"true" : @"false";
    [UICKeyChainStore setString:sDisable forKey:@"crashservice" service:NCGlobal.shared.serviceShareKeyChain];
}

+ (void)setPassword:(NSString *)account password:(NSString *)password
{
    NSString *key = [@"password" stringByAppendingString:account];
    [UICKeyChainStore setString:password forKey:key service:NCGlobal.shared.serviceShareKeyChain];
}

+ (NSString *)getPassword:(NSString *)account
{
    NSString *key = [@"password" stringByAppendingString:account];
    NSString *result = [UICKeyChainStore stringForKey:key service:NCGlobal.shared.serviceShareKeyChain];
    if (result == nil) { result = @""; }
    return result;
}

+ (void)setHCBusinessType:(NSString *)professions
{
    [UICKeyChainStore setString:professions forKey:@"businessType" service:NCGlobal.shared.serviceShareKeyChain];
}

+ (NSString *)getHCBusinessType
{
    return [UICKeyChainStore stringForKey:@"businessType" service:NCGlobal.shared.serviceShareKeyChain];
}

+ (NSData *)getDatabaseEncryptionKey
{
    NSData *key = [UICKeyChainStore dataForKey:@"databaseEncryptionKey" service:NCGlobal.shared.serviceShareKeyChain];
    if (key == nil) {
        NSMutableData *key = [NSMutableData dataWithLength:64];
        (void)SecRandomCopyBytes(kSecRandomDefault, key.length, (uint8_t *)key.mutableBytes);
        [UICKeyChainStore setData:key forKey:@"databaseEncryptionKey" service:NCGlobal.shared.serviceShareKeyChain];
        return key;
    } else {
        return key;
    }
}

+ (void)setDatabaseEncryptionKey:(NSData *)data
{
    [UICKeyChainStore setData:data forKey:@"databaseEncryptionKey" service:NCGlobal.shared.serviceShareKeyChain];
}

+ (BOOL)getLivePhoto
{
    NSString *valueString = [UICKeyChainStore stringForKey:@"livePhoto" service:NCGlobal.shared.serviceShareKeyChain];

    // Default TRUE
    if (valueString == nil) {
        [self setLivePhoto:YES];
        return true;
    }

    return [valueString boolValue];
}

+ (void)setLivePhoto:(BOOL)set
{
    NSString *sSet = (set) ? @"true" : @"false";
    [UICKeyChainStore setString:sSet forKey:@"livePhoto" service:NCGlobal.shared.serviceShareKeyChain];
}

+ (NSString *)getMediaSortDate
{
    NSString *valueString = [UICKeyChainStore stringForKey:@"mediaSortDate" service:NCGlobal.shared.serviceShareKeyChain];

    // Default TRUE
    if (valueString == nil) {
        [self setMediaSortDate:@"date"];
        return @"date";
    }

    return valueString;
}

+ (void)setMediaSortDate:(NSString *)value
{
    [UICKeyChainStore setString:value forKey:@"mediaSortDate" service:NCGlobal.shared.serviceShareKeyChain];
}

+ (BOOL)getTextRecognitionStatus
{
    return [[UICKeyChainStore stringForKey:@"textRecognitionStatus" service:NCGlobal.shared.serviceShareKeyChain] boolValue];
}

+ (void)setTextRecognitionStatus:(BOOL)value
{
    NSString *valueString = (value) ? @"true" : @"false";
    [UICKeyChainStore setString:valueString forKey:@"textRecognitionStatus" service:NCGlobal.shared.serviceShareKeyChain];
}

+ (BOOL)getDeleteAllScanImages
{
    return [[UICKeyChainStore stringForKey:@"deleteAllScanImages" service:NCGlobal.shared.serviceShareKeyChain] boolValue];
}

+ (void)setDeleteAllScanImages:(BOOL)value
{
    NSString *valueString = (value) ? @"true" : @"false";
    [UICKeyChainStore setString:valueString forKey:@"deleteAllScanImages" service:NCGlobal.shared.serviceShareKeyChain];
}

+ (NSString *)getDirectoryScanDocument
{
    return [UICKeyChainStore stringForKey:@"directoryScanDocuments" service:NCGlobal.shared.serviceShareKeyChain];
}

+ (void)setDirectoryScanDocument:(NSString *)value
{
    [UICKeyChainStore setString:value forKey:@"directoryScanDocuments" service:NCGlobal.shared.serviceShareKeyChain];
}

+ (double)getQualityScanDocument
{
    NSString *value = [UICKeyChainStore stringForKey:@"qualityScanDocument" service:NCGlobal.shared.serviceShareKeyChain];

    if (value == nil) {
        return 2;
    } else {
        return [value doubleValue];
    }
}

+ (void)setQualityScanDocument:(double)value
{
    NSString *valueString = [@(value) stringValue];
    [UICKeyChainStore setString:valueString forKey:@"qualityScanDocument" service:NCGlobal.shared.serviceShareKeyChain];
}

+ (NSInteger)getLogLevel
{
    NSString *value = [UICKeyChainStore stringForKey:@"logLevel" service:NCGlobal.shared.serviceShareKeyChain];

    if (value == nil) {
        return 1;
    } else {
        return [value integerValue];
    }
}

+ (void)setLogLevel:(NSInteger)value
{
    NSString *valueString = [@(value) stringValue];
    [UICKeyChainStore setString:valueString forKey:@"logLevel" service:NCGlobal.shared.serviceShareKeyChain];
}

+ (BOOL)getAccountRequest
{
    return [[UICKeyChainStore stringForKey:@"accountRequest" service:NCGlobal.shared.serviceShareKeyChain] boolValue];
}

+ (void)setAccountRequest:(BOOL)set
{
    NSString *sSet = (set) ? @"true" : @"false";
    [UICKeyChainStore setString:sSet forKey:@"accountRequest" service:NCGlobal.shared.serviceShareKeyChain];
}

+ (NSInteger)getCleanUpDay
{
    NSString *size = [UICKeyChainStore stringForKey:@"cleanUpDay" service:NCGlobal.shared.serviceShareKeyChain];

    if (size == nil) {
        NSInteger days = [[NCBrandOptions shared] cleanUpDay];
        return days;
    } else {
        return [size integerValue];
    }
}

+ (void)setCleanUpDay:(NSInteger)days
{
    NSString *daysString = [@(days) stringValue];
    [UICKeyChainStore setString:daysString forKey:@"cleanUpDay" service:NCGlobal.shared.serviceShareKeyChain];
}

+ (BOOL)getPrivacyScreenEnabled
{
    return [[UICKeyChainStore stringForKey:@"privacyScreen" service:NCGlobal.shared.serviceShareKeyChain] boolValue];
}

+ (void)setPrivacyScreenEnabled:(BOOL)set
{
    NSString *sSet = (set) ? @"true" : @"false";
    [UICKeyChainStore setString:sSet forKey:@"privacyScreen" service:NCGlobal.shared.serviceShareKeyChain];
}

+ (BOOL)getRemovePhotoCameraRoll
{
    return [[UICKeyChainStore stringForKey:@"removePhotoCameraRoll" service:NCGlobal.shared.serviceShareKeyChain] boolValue];
}

+ (void)setRemovePhotoCameraRoll:(BOOL)set
{
    NSString *sSet = (set) ? @"true" : @"false";
    [UICKeyChainStore setString:sSet forKey:@"removePhotoCameraRoll" service:NCGlobal.shared.serviceShareKeyChain];
}

#pragma --------------------------------------------------------------------------------------------
#pragma mark ===== Various =====
#pragma --------------------------------------------------------------------------------------------

+ (BOOL)addSkipBackupAttributeToItemAtURL:(NSURL *)URL
{
    NSError *error = nil;
    BOOL success = [URL setResourceValue:[NSNumber numberWithBool: YES] forKey: NSURLIsExcludedFromBackupKey error: &error];
    if(success) {
        NSLog(@"Excluding %@ from backup", [URL lastPathComponent]);
    } else {
        NSLog(@"Error excluding %@ from backup %@", [URL lastPathComponent], error);
    }

    return success;
}

+ (NSString *)dateDiff:(NSDate *) convertedDate
{
    NSDate *todayDate = [NSDate date];
    double ti = [convertedDate timeIntervalSinceDate:todayDate];
    ti = ti * -1;
    if (ti < 60) {
        return NSLocalizedString(@"_less_a_minute_", nil);
    } else if (ti < 3600) {
        int diff = round(ti / 60);
        if (diff == 1) {
            return NSLocalizedString(@"_a_minute_ago_", nil);
        } else {
            return [NSString stringWithFormat:NSLocalizedString(@"_minutes_ago_", nil), diff];
        }
    } else if (ti < 86400) {
        int diff = round(ti / 60 / 60);
        if (diff == 1) {
            return NSLocalizedString(@"_an_hour_ago_", nil);
        } else {
            return[NSString stringWithFormat:NSLocalizedString(@"_hours_ago_", nil), diff];
        }
    } else if (ti < 86400 * 30) {
        int diff = round(ti / 60 / 60 / 24);
        if (diff == 1) {
            return NSLocalizedString(@"_a_day_ago_", nil);
        } else {
            return[NSString stringWithFormat:NSLocalizedString(@"_days_ago_", nil), diff];
        }
    } else {
        // Older than one month
        NSDateFormatter *df = [[NSDateFormatter alloc] init];
        [df setFormatterBehavior:NSDateFormatterBehavior10_4];
        [df setDateStyle:NSDateFormatterMediumStyle];
        return [df stringFromDate:convertedDate];
    }
}

+ (NSString *)transformedSize:(int64_t)value
{
    NSString *string = [NSByteCountFormatter stringFromByteCount:value countStyle:NSByteCountFormatterCountStyleBinary];
    return string;
}

// Remove do not forbidden characters for Nextcloud Server
+ (NSString *)removeForbiddenCharactersServer:(NSString *)fileName
{
    NSArray *arrayForbiddenCharacters = [NSArray arrayWithObjects:@"/", nil];

    for (NSString *currentCharacter in arrayForbiddenCharacters) {
        fileName = [fileName stringByReplacingOccurrencesOfString:currentCharacter withString:@""];
    }

    return fileName;
}

// Remove do not forbidden characters for File System Server
+ (NSString *)removeForbiddenCharactersFileSystem:(NSString *)fileName
{
    NSArray *arrayForbiddenCharacters = [NSArray arrayWithObjects:@"\\",@"<",@">",@":",@"\"",@"|",@"?",@"*",@"/", nil];

    for (NSString *currentCharacter in arrayForbiddenCharacters) {
        fileName = [fileName stringByReplacingOccurrencesOfString:currentCharacter withString:@""];
    }

    return fileName;
}

+ (NSString*)stringAppendServerUrl:(NSString *)serverUrl addFileName:(NSString *)addFileName
{
    NSString *result;

    if (serverUrl == nil || addFileName == nil) return nil;
    if ([addFileName isEqualToString:@""]) return serverUrl;

    if ([serverUrl isEqualToString:@"/"]) result = [serverUrl stringByAppendingString:addFileName];
    else result = [NSString stringWithFormat:@"%@/%@", serverUrl, addFileName];

    return result;
}

+ (NSString *)createFileNameDate:(NSString *)fileName extension:(NSString *)extension
{
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"yy-MM-dd HH-mm-ss"];
    NSString *fileNameDate = [formatter stringFromDate:[NSDate date]];
    NSString *returnFileName;

    if ([fileName isEqualToString:@""] && ![extension isEqualToString:@""]) {
        returnFileName = [NSString stringWithFormat:@"%@.%@", fileNameDate, extension];
    }

    if (![fileName isEqualToString:@""] && [extension isEqualToString:@""]) {
        returnFileName = [NSString stringWithFormat:@"%@ %@", fileName, fileNameDate];
    }

    if ([fileName isEqualToString:@""] && [extension isEqualToString:@""]) {
        returnFileName = fileNameDate;
    }

    if (![fileName isEqualToString:@""] && ![extension isEqualToString:@""]) {
        returnFileName = [NSString stringWithFormat:@"%@ %@.%@", fileName, fileNameDate, extension];
    }

    return returnFileName;
}

+ (NSString *)createFileName:(NSString *)fileName fileDate:(NSDate *)fileDate fileType:(PHAssetMediaType)fileType keyFileName:(NSString *)keyFileName keyFileNameType:(NSString *)keyFileNameType keyFileNameOriginal:(NSString *)keyFileNameOriginal forcedNewFileName:(BOOL)forcedNewFileName
{
    BOOL addFileNameType = NO;

    // Original FileName ?
    if ([[NCKeychain init] getOriginalFileNameWithKey:keyFileNameOriginal] && !forcedNewFileName) {
        return fileName;
    }

    NSString *numberFileName;
    if ([fileName length] > 8) numberFileName = [fileName substringWithRange:NSMakeRange(04, 04)];
    else numberFileName = [NCKeychain alloc].incrementalNumber;

    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"]];
    [formatter setDateFormat:@"yy-MM-dd HH-mm-ss"];
    NSString *fileNameDate = [formatter stringFromDate:fileDate];

    NSString *fileNameType = @"";
    if (fileType == PHAssetMediaTypeImage)
        fileNameType = NSLocalizedString(@"_photo_", nil);
    if (fileType == PHAssetMediaTypeVideo)
        fileNameType = NSLocalizedString(@"_video_", nil);
    if (fileType == PHAssetMediaTypeAudio)
        fileNameType = NSLocalizedString(@"_audio_", nil);
    if (fileType == PHAssetMediaTypeUnknown)
        fileNameType = NSLocalizedString(@"_unknown_", nil);

    // Use File Name Type
    if (keyFileNameType)
        addFileNameType = [[NCKeychain init] getFileNameTypeWithKey:keyFileNameType];

    NSString *fileNameExt = [[fileName pathExtension] lowercaseString];

    if (keyFileName) {

        fileName = [[NCKeychain init] getFileNameMaskWithKey:keyFileName];

        if ([fileName length] > 0) {

            [formatter setDateFormat:@"dd"];
            NSString *dayNumber = [formatter stringFromDate:fileDate];
            [formatter setDateFormat:@"MMM"];
            NSString *month = [formatter stringFromDate:fileDate];
            [formatter setDateFormat:@"MM"];
            NSString *monthNumber = [formatter stringFromDate:fileDate];
            [formatter setDateFormat:@"yyyy"];
            NSString *year = [formatter stringFromDate:fileDate];
            [formatter setDateFormat:@"yy"];
            NSString *yearNumber = [formatter stringFromDate:fileDate];
            [formatter setDateFormat:@"HH"];
            NSString *hour24 = [formatter stringFromDate:fileDate];
            [formatter setDateFormat:@"hh"];
            NSString *hour12 = [formatter stringFromDate:fileDate];
            [formatter setDateFormat:@"mm"];
            NSString *minute = [formatter stringFromDate:fileDate];
            [formatter setDateFormat:@"ss"];
            NSString *second = [formatter stringFromDate:fileDate];
            [formatter setDateFormat:@"a"];
            NSString *ampm = [formatter stringFromDate:fileDate];

            // Replace string with date

            fileName = [fileName stringByReplacingOccurrencesOfString:@"DD" withString:dayNumber];
            fileName = [fileName stringByReplacingOccurrencesOfString:@"MMM" withString:month];
            fileName = [fileName stringByReplacingOccurrencesOfString:@"MM" withString:monthNumber];
            fileName = [fileName stringByReplacingOccurrencesOfString:@"YYYY" withString:year];
            fileName = [fileName stringByReplacingOccurrencesOfString:@"YY" withString:yearNumber];

            fileName = [fileName stringByReplacingOccurrencesOfString:@"HH" withString:hour24];
            fileName = [fileName stringByReplacingOccurrencesOfString:@"hh" withString:hour12];
            fileName = [fileName stringByReplacingOccurrencesOfString:@"mm" withString:minute];
            fileName = [fileName stringByReplacingOccurrencesOfString:@"ss" withString:second];
            fileName = [fileName stringByReplacingOccurrencesOfString:@"ampm" withString:ampm];

            if (addFileNameType)
                fileName = [NSString stringWithFormat:@"%@%@%@.%@", fileNameType, fileName, numberFileName, fileNameExt];
            else
                fileName = [NSString stringWithFormat:@"%@%@.%@", fileName, numberFileName, fileNameExt];

            fileName = [fileName stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

        } else {

            if (addFileNameType)
                fileName = [NSString stringWithFormat:@"%@ %@ %@.%@", fileNameType, fileNameDate, numberFileName, fileNameExt];
            else
                fileName = [NSString stringWithFormat:@"%@ %@.%@", fileNameDate, numberFileName, fileNameExt];
        }

    } else {

        if (addFileNameType)
            fileName = [NSString stringWithFormat:@"%@ %@ %@.%@", fileNameType, fileNameDate, numberFileName, fileNameExt];
        else
            fileName = [NSString stringWithFormat:@"%@ %@.%@", fileNameDate, numberFileName, fileNameExt];

    }

    return fileName;
}

+ (void)createDirectoryStandard
{
    NSString *path;
    NSURL *dirGroup = [CCUtility getDirectoryGroup];

    NSLog(@"[LOG] Dir Group");
    NSLog(@"%@", [dirGroup path]);
    NSLog(@"[LOG] Program application ");
    NSLog(@"%@", [[CCUtility getDirectoryDocuments] stringByDeletingLastPathComponent]);

    // create Directory Documents
    path = [CCUtility getDirectoryDocuments];
    if (![[NSFileManager defaultManager] fileExistsAtPath: path])
        [[NSFileManager defaultManager] createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:nil];

    // create Directory audio => Library, Application Support, audio
    path = [CCUtility getDirectoryAudio];
    if (![[NSFileManager defaultManager] fileExistsAtPath: path])
        [[NSFileManager defaultManager] createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:nil];

    // create Directory database Nextcloud
    path = [[dirGroup URLByAppendingPathComponent:[[NCGlobal shared] appDatabaseNextcloud]] path];
    if (![[NSFileManager defaultManager] fileExistsAtPath:path])
        [[NSFileManager defaultManager] createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:nil];

    // create Directory User Data
    path = [[dirGroup URLByAppendingPathComponent:NCGlobal.shared.appUserData] path];
    if (![[NSFileManager defaultManager] fileExistsAtPath:path])
        [[NSFileManager defaultManager] createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:nil];

    // create Directory Provider Storage
    path = [CCUtility getDirectoryProviderStorage];
    if (![[NSFileManager defaultManager] fileExistsAtPath: path])
        [[NSFileManager defaultManager] createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:nil];

    // create Directory Scan
    path = [[dirGroup URLByAppendingPathComponent:NCGlobal.shared.appScan] path];
    if (![[NSFileManager defaultManager] fileExistsAtPath:path])
        [[NSFileManager defaultManager] createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:nil];

    // create Directory Temp
    path = NSTemporaryDirectory();
    if (![[NSFileManager defaultManager] fileExistsAtPath:path])
        [[NSFileManager defaultManager] createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:nil];

    // Directory Excluded From Backup
    [CCUtility addSkipBackupAttributeToItemAtURL:[[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject]];
    [CCUtility addSkipBackupAttributeToItemAtURL:[[CCUtility getDirectoryGroup] URLByAppendingPathComponent:NCGlobal.shared.directoryProviderStorage]];
    [CCUtility addSkipBackupAttributeToItemAtURL:[[CCUtility getDirectoryGroup] URLByAppendingPathComponent:NCGlobal.shared.appApplicationSupport]];

    [CCUtility addSkipBackupAttributeToItemAtURL:[[CCUtility getDirectoryGroup] URLByAppendingPathComponent:NCGlobal.shared.appCertificates]];
    [CCUtility addSkipBackupAttributeToItemAtURL:[[CCUtility getDirectoryGroup] URLByAppendingPathComponent:NCGlobal.shared.appDatabaseNextcloud]];
    [CCUtility addSkipBackupAttributeToItemAtURL:[[CCUtility getDirectoryGroup] URLByAppendingPathComponent:NCGlobal.shared.appScan]];
    [CCUtility addSkipBackupAttributeToItemAtURL:[[CCUtility getDirectoryGroup] URLByAppendingPathComponent:NCGlobal.shared.appUserData]];
}

+ (NSURL *)getDirectoryGroup
{
    NSURL *path = [[NSFileManager defaultManager] containerURLForSecurityApplicationGroupIdentifier:[NCBrandOptions shared].capabilitiesGroups];
    return path;
}

// Return the path of directory Documents -> NSDocumentDirectory
+ (NSString *)getDirectoryDocuments
{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

    return [paths objectAtIndex:0];
}

+ (NSString *)getDirectoryReaderMetadata
{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES);

    return [NSString stringWithFormat:@"%@/Reader Metadata", [paths objectAtIndex:0]];
}

// Return the path of directory Audio
+ (NSString *)getDirectoryAudio
{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES);

    return [NSString stringWithFormat:@"%@/%@", [paths objectAtIndex:0], @"audio"];
}

// Return the path of directory Cetificates
+ (NSString *)getDirectoryCerificates
{
    NSString *path = [[[CCUtility getDirectoryGroup] URLByAppendingPathComponent:NCGlobal.shared.appCertificates] path];

    if (![[NSFileManager defaultManager] fileExistsAtPath:path])
        [[NSFileManager defaultManager] createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:nil];

    return path;
}

+ (NSString *)getDirectoryUserData
{
    NSString *path = [[[CCUtility getDirectoryGroup] URLByAppendingPathComponent:NCGlobal.shared.appUserData] path];

    if (![[NSFileManager defaultManager] fileExistsAtPath:path])
        [[NSFileManager defaultManager] createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:nil];

    return path;
}

+ (NSString *)getDirectoryProviderStorage
{
    NSString *path = [[[CCUtility getDirectoryGroup] URLByAppendingPathComponent:NCGlobal.shared.directoryProviderStorage] path];

    if (![[NSFileManager defaultManager] fileExistsAtPath:path])
        [[NSFileManager defaultManager] createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:nil];

    return path;
}

+ (NSString *)getDirectoryProviderStorageOcId:(NSString *)ocId
{
    NSString *path = [NSString stringWithFormat:@"%@/%@", [self getDirectoryProviderStorage], ocId];

    if (![[NSFileManager defaultManager] fileExistsAtPath:path])
        [[NSFileManager defaultManager] createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:nil];

    return path;
}

+ (NSString *)getDirectoryProviderStorageOcId:(NSString *)ocId fileNameView:(NSString *)fileNameView
{
    NSString *fileNamePath = [NSString stringWithFormat:@"%@/%@", [self getDirectoryProviderStorageOcId:ocId], fileNameView];

    // if do not exists create file 0 length
    // causes files with lenth 0 to never be downloaded, because already exist
    // also makes it impossible to delete any file with length 0 (from cache)
    if ([[NSFileManager defaultManager] fileExistsAtPath:fileNamePath] == NO) {
        [[NSFileManager defaultManager] createFileAtPath:fileNamePath contents:nil attributes:nil];
    }

    return fileNamePath;
}

+ (NSString *)getDirectoryProviderStorageIconOcId:(NSString *)ocId etag:(NSString *)etag
{
    return [NSString stringWithFormat:@"%@/%@.small.%@", [self getDirectoryProviderStorageOcId:ocId], etag, [NCGlobal shared].extensionPreview];
}

+ (NSString *)getDirectoryProviderStoragePreviewOcId:(NSString *)ocId etag:(NSString *)etag
{
    return [NSString stringWithFormat:@"%@/%@.preview.%@", [self getDirectoryProviderStorageOcId:ocId], etag, [NCGlobal shared].extensionPreview];
}

+ (BOOL)fileProviderStorageExists:(tableMetadata *)metadata
{
    NSString *fileNameViewPath = [self getDirectoryProviderStorageOcId:metadata.ocId fileNameView:metadata.fileNameView];
    NSString *fileNamePath = [self getDirectoryProviderStorageOcId:metadata.ocId fileNameView:metadata.fileName];

    unsigned long long fileNameViewSize = [[[NSFileManager defaultManager] attributesOfItemAtPath:fileNameViewPath error:nil] fileSize];
    unsigned long long fileNameSize = [[[NSFileManager defaultManager] attributesOfItemAtPath:fileNamePath error:nil] fileSize];

    if (metadata.isDirectoryE2EE == true) {
        if ((fileNameSize == metadata.size || fileNameViewSize == metadata.size) && fileNameViewSize > 0) {
            return true;
        } else {
            return false;
        }
    } else {
        return fileNameViewSize == metadata.size;
    }
}

+ (int64_t)fileProviderStorageSize:(NSString *)ocId fileNameView:(NSString *)fileNameView
{
    NSString *fileNamePath = [self getDirectoryProviderStorageOcId:ocId fileNameView:fileNameView];

    int64_t fileSize = [[[NSFileManager defaultManager] attributesOfItemAtPath:fileNamePath error:nil] fileSize];

    return fileSize;
}

+ (BOOL)fileProviderStoragePreviewIconExists:(NSString *)ocId etag:(NSString *)etag
{
    NSString *fileNamePathPreview = [self getDirectoryProviderStoragePreviewOcId:ocId etag:etag];
    NSString *fileNamePathIcon = [self getDirectoryProviderStorageIconOcId:ocId etag:etag];

    unsigned long long fileSizePreview = [[[NSFileManager defaultManager] attributesOfItemAtPath:fileNamePathPreview error:nil] fileSize];
    unsigned long long fileSizeIcon = [[[NSFileManager defaultManager] attributesOfItemAtPath:fileNamePathIcon error:nil] fileSize];

    if (fileSizePreview > 0 && fileSizeIcon > 0) return true;
    else return false;
}

+ (void)removeGroupApplicationSupport
{
    NSURL *dirGroup = [CCUtility getDirectoryGroup];
    NSString *path = [[dirGroup URLByAppendingPathComponent:NCGlobal.shared.appApplicationSupport] path];

    [[NSFileManager defaultManager] removeItemAtPath:path error:nil];
}

+ (void)removeGroupLibraryDirectory
{
    [[NSFileManager defaultManager] removeItemAtPath:[CCUtility getDirectoryScan] error:nil];
    [[NSFileManager defaultManager] removeItemAtPath:[CCUtility getDirectoryUserData] error:nil];
}

+ (void)removeGroupDirectoryProviderStorage
{
    [[NSFileManager defaultManager] removeItemAtPath:[CCUtility getDirectoryProviderStorage] error:nil];
}

+ (void)removeDocumentsDirectory
{
    [[NSFileManager defaultManager] removeItemAtPath:[CCUtility getDirectoryDocuments] error:nil];
}

+ (void)removeTemporaryDirectory
{
    [[NSFileManager defaultManager] removeItemAtPath:NSTemporaryDirectory() error:nil];
}

+ (void)emptyTemporaryDirectory
{
    NSArray* tmpDirectory = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:NSTemporaryDirectory() error:NULL];
    for (NSString *file in tmpDirectory) {
        [[NSFileManager defaultManager] removeItemAtPath:[NSString stringWithFormat:@"%@%@", NSTemporaryDirectory(), file] error:NULL];
    }
}

+ (NSString *)getTitleSectionDate:(NSDate *)date
{
    NSString *title;
    NSDate *today = [NSDate date];
    NSDate *yesterday = [today dateByAddingTimeInterval: -86400.0];

    if ([date isEqualToDate:[CCUtility datetimeWithOutTime:[NSDate distantPast]]]) {

        title =  NSLocalizedString(@"_no_date_", nil);

    } else {

        title = [NSDateFormatter localizedStringFromDate:date dateStyle:NSDateFormatterLongStyle timeStyle:0];

        if ([date isEqualToDate:[CCUtility datetimeWithOutTime:today]])
            title = [NSString stringWithFormat:NSLocalizedString(@"_today_", nil)];

        if ([date isEqualToDate:[CCUtility datetimeWithOutTime:yesterday]])
            title = [NSString stringWithFormat:NSLocalizedString(@"_yesterday_", nil)];
    }

    return title;
}

+ (void)moveFileAtPath:(NSString *)atPath toPath:(NSString *)toPath
{
    [[NSFileManager defaultManager] removeItemAtPath:toPath error:nil];
    [[NSFileManager defaultManager] copyItemAtPath:atPath toPath:toPath error:nil];
    [[NSFileManager defaultManager] removeItemAtPath:atPath error:nil];
}

+ (void)copyFileAtPath:(NSString *)atPath toPath:(NSString *)toPath
{
    [[NSFileManager defaultManager] removeItemAtPath:toPath error:nil];
    [[NSFileManager defaultManager] copyItemAtPath:atPath toPath:toPath error:nil];
}

+ (void)removeFileAtPath:(NSString *)atPath
{
    [[NSFileManager defaultManager] removeItemAtPath:atPath error:nil];
}

+ (void)createDirectoryAtPath:(NSString *)atPath
{
    [[NSFileManager defaultManager] createDirectoryAtPath:atPath withIntermediateDirectories:true attributes:nil error:nil];
}

+ (NSString *)returnPathfromServerUrl:(NSString *)serverUrl urlBase:(NSString *)urlBase userId:(NSString *)userId account:(NSString *)account
{
    NSString *homeServer = [[NCUtilityFileSystem shared] getHomeServerWithUrlBase:urlBase userId:userId];
    NSString *path = [serverUrl stringByReplacingOccurrencesOfString:homeServer withString:@""];
    return path;
}

+ (NSString *)returnFileNamePathFromFileName:(NSString *)metadataFileName serverUrl:(NSString *)serverUrl urlBase:(NSString *)urlBase userId:(NSString *)userId account:(NSString *)account
{
    if (metadataFileName == nil || serverUrl == nil || urlBase == nil) {
        return @"";
    }

    NSString *homeServer = [[NCUtilityFileSystem shared] getHomeServerWithUrlBase:urlBase userId:userId];
    NSString *fileName = [NSString stringWithFormat:@"%@/%@", [serverUrl stringByReplacingOccurrencesOfString:homeServer withString:@""], metadataFileName];

    if ([fileName hasPrefix:@"/"]) fileName = [fileName substringFromIndex:1];

    return fileName;
}

+ (NSString *)getMimeType:(NSString *)fileNameView
{
    CFStringRef fileUTI = nil;
    NSString *returnFileUTI = nil;

    if ([fileNameView isEqualToString:@"."]) {

        return returnFileUTI;

    } else {
        CFStringRef fileExtension = (__bridge CFStringRef)[fileNameView pathExtension];
        NSString *ext = (__bridge NSString *)fileExtension;
        ext = ext.uppercaseString;
        fileUTI = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, fileExtension, NULL);

        if (fileUTI != nil) {
            returnFileUTI = (__bridge NSString *)fileUTI;
            CFRelease(fileUTI);
        }
    }

    return returnFileUTI;
}

+ (NSString *)getDirectoryScan
{
    NSString *path = [[[CCUtility getDirectoryGroup] URLByAppendingPathComponent:NCGlobal.shared.appScan] path];

    if (![[NSFileManager defaultManager] fileExistsAtPath:path])
        [[NSFileManager defaultManager] createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:nil];

    return path;
}

#pragma --------------------------------------------------------------------------------------------
#pragma mark ===== Share Permissions =====
#pragma --------------------------------------------------------------------------------------------

+ (NSInteger) getPermissionsValueByCanEdit:(BOOL)canEdit andCanCreate:(BOOL)canCreate andCanChange:(BOOL)canChange andCanDelete:(BOOL)canDelete andCanShare:(BOOL)canShare andIsFolder:(BOOL) isFolder
{
    NSInteger permissionsValue = NCGlobal.shared.permissionReadShare;

    if (canEdit && !isFolder) {
        permissionsValue = permissionsValue + NCGlobal.shared.permissionUpdateShare;
    }
    if (canCreate & isFolder) {
        permissionsValue = permissionsValue + NCGlobal.shared.permissionCreateShare;
    }
    if (canChange && isFolder) {
        permissionsValue = permissionsValue + NCGlobal.shared.permissionUpdateShare;
    }
    if (canDelete & isFolder) {
        permissionsValue = permissionsValue + NCGlobal.shared.permissionDeleteShare;
    }
    if (canShare) {
        permissionsValue = permissionsValue + NCGlobal.shared.permissionShareShare;
    }

    return permissionsValue;
}

+ (BOOL) isPermissionToCanCreate:(NSInteger) permissionValue {
    BOOL canCreate = ((permissionValue & NCGlobal.shared.permissionCreateShare) > 0);
    return canCreate;
}

+ (BOOL) isPermissionToCanChange:(NSInteger) permissionValue {
    BOOL canChange = ((permissionValue & NCGlobal.shared.permissionUpdateShare) > 0);
    return canChange;
}

+ (BOOL) isPermissionToCanDelete:(NSInteger) permissionValue {
    BOOL canDelete = ((permissionValue & NCGlobal.shared.permissionDeleteShare) > 0);
    return canDelete;
}

+ (BOOL) isPermissionToCanShare:(NSInteger) permissionValue {
    BOOL canShare = ((permissionValue & NCGlobal.shared.permissionShareShare) > 0);
    return canShare;
}

+ (BOOL) isAnyPermissionToEdit:(NSInteger) permissionValue {

    BOOL canCreate = [self isPermissionToCanCreate:permissionValue];
    BOOL canChange = [self isPermissionToCanChange:permissionValue];
    BOOL canDelete = [self isPermissionToCanDelete:permissionValue];


    BOOL canEdit = (canCreate || canChange || canDelete);

    return canEdit;

}

+ (BOOL) isPermissionToRead:(NSInteger) permissionValue {
    BOOL canRead = ((permissionValue & NCGlobal.shared.permissionReadShare) > 0);
    return canRead;
}

+ (BOOL) isPermissionToReadCreateUpdate:(NSInteger) permissionValue {

    BOOL canRead   = [self isPermissionToRead:permissionValue];
    BOOL canCreate = [self isPermissionToCanCreate:permissionValue];
    BOOL canChange = [self isPermissionToCanChange:permissionValue];


    BOOL canEdit = (canCreate && canChange && canRead);

    return canEdit;

}

#pragma --------------------------------------------------------------------------------------------
#pragma mark ===== Third parts =====
#pragma --------------------------------------------------------------------------------------------

+ (NSString *)getExtension:(NSString*)fileName
{
    NSMutableArray *fileNameArray =[[NSMutableArray alloc] initWithArray: [fileName componentsSeparatedByCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"."]]];
    NSString *extension = [NSString stringWithFormat:@"%@",[fileNameArray lastObject]];
    extension = [extension uppercaseString];
    //If the file has a ZIP extension obtain the previous one for check if it is a .pages.zip / .numbers.zip / .key.zip extension
    if ([extension isEqualToString:@"ZIP"]) {
        [fileNameArray removeLastObject];
        NSString *secondExtension = [NSString stringWithFormat:@"%@",[fileNameArray lastObject]];
        secondExtension = [secondExtension uppercaseString];
        if ([secondExtension isEqualToString:@"PAGES"] || [secondExtension isEqualToString:@"NUMBERS"] || [secondExtension isEqualToString:@"KEY"]) {
            extension = [NSString stringWithFormat:@"%@.%@",secondExtension,extension];
            return extension;
        }
    }
    return extension;
}

+ (NSDate *)datetimeWithOutTime:(NSDate *)datDate
{
    if (datDate == nil) return nil;

    NSDateComponents* comps = [[NSCalendar currentCalendar] components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay fromDate:datDate];
    datDate = [[NSCalendar currentCalendar] dateFromComponents:comps];

    return datDate;
}

+ (NSString *)valueForKey:(NSString *)key fromQueryItems:(NSArray *)queryItems
{
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"name=%@", key];
    NSURLQueryItem *queryItem = [[queryItems filteredArrayUsingPredicate:predicate] firstObject];
    return queryItem.value;
}

+ (NSDate *)getATime:(const char *)path
{
    struct stat st;
    stat(path, &st);
    time_t accessed = st.st_atime;
    NSDate *date = [NSDate dateWithTimeIntervalSince1970:accessed];
    return date;
}
@end