space-ios/iOSClient/Utility/CCExifGeo.m

//
//  CCExifGeo.m
//  Nextcloud
//
//  Created by Marino Faggiana on 03/02/16.
//  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 "CCExifGeo.h"
#import "CCUtility.h"
#import "NCBridgeSwift.h"

@implementation CCExifGeo

+ (CCExifGeo *)sharedInstance {
    
    static CCExifGeo *sharedInstance;
    
    @synchronized(self)
    {
        if (!sharedInstance) {
            
            sharedInstance = [CCExifGeo new];
        }
        return sharedInstance;
    }
}

- (void)setExifLocalTableEtag:(tableMetadata *)metadata
{
    NSString *dateTime;
    NSString *latitudeRef;
    NSString *longitudeRef;
    NSString *stringLatitude = @"0";
    NSString *stringLongitude = @"0";
    
    double latitude = 0;
    double longitude = 0;
    
    NSDate *date = [NSDate new];
    
    if (![CCUtility fileProviderStorageExists:metadata.ocId fileNameView:metadata.fileNameView])
        return;

    NSURL *url = [NSURL fileURLWithPath:[CCUtility getDirectoryProviderStorageOcId:metadata.ocId fileNameView:metadata.fileNameView]];

    CGImageSourceRef originalSource =  CGImageSourceCreateWithURL((CFURLRef) url, NULL);
    if (!originalSource)
        return;
    
    CFDictionaryRef imageProperties = CGImageSourceCopyPropertiesAtIndex(originalSource, 0, NULL);
    if (!imageProperties)
        return;
    
    CFDictionaryRef tiff = CFDictionaryGetValue(imageProperties, kCGImagePropertyTIFFDictionary);
    CFDictionaryRef gps = CFDictionaryGetValue(imageProperties, kCGImagePropertyGPSDictionary);

    if (tiff) {
        
        dateTime = (NSString *)CFDictionaryGetValue(tiff, kCGImagePropertyTIFFDateTime);
        
        NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
        [dateFormatter setDateFormat:@"yyyy:MM:dd HH:mm:ss"];
    
        date = [dateFormatter dateFromString:dateTime];
        if (!date) date = metadata.date;
    }
    
    if (gps) {
        
        latitude = [(NSString *)CFDictionaryGetValue(gps, kCGImagePropertyGPSLatitude) doubleValue];
        longitude = [(NSString *)CFDictionaryGetValue(gps, kCGImagePropertyGPSLongitude) doubleValue];
        
        latitudeRef = (NSString *)CFDictionaryGetValue(gps, kCGImagePropertyGPSLatitudeRef);
        longitudeRef = (NSString *)CFDictionaryGetValue(gps, kCGImagePropertyGPSLongitudeRef);
        
        // conversion 4 decimal +N -S
        // The latitude in degrees. Positive values indicate latitudes north of the equator. Negative values indicate latitudes south of the equator.
        if ([latitudeRef isEqualToString:@"N"])
            stringLatitude = [NSString stringWithFormat:@"+%.4f", latitude];
        else
            stringLatitude = [NSString stringWithFormat:@"-%.4f", latitude];
        
        // conversion 4 decimal +E -W
        // The longitude in degrees. Measurements are relative to the zero meridian, with positive values extending east of the meridian
        // and negative values extending west of the meridian.
        if ([longitudeRef isEqualToString:@"E"])
            stringLongitude = [NSString stringWithFormat:@"+%.4f", longitude];
        else
            stringLongitude = [NSString stringWithFormat:@"-%.4f", longitude];
        
        if (latitude == 0 || longitude == 0){
            
            stringLatitude = @"0";
            stringLongitude = @"0";
        }
    }

    // Wite data EXIF in TableLocalFile
    if (tiff || gps)
        [[NCManageDatabase sharedInstance] setLocalFileWithOcId:metadata.ocId date:nil exifDate:date exifLatitude:stringLatitude exifLongitude:stringLongitude fileName:nil etag:nil];
    
    CFRelease(originalSource);
    CFRelease(imageProperties);
}

- (void)setGeocoderEtag:(NSString *)ocId exifDate:(NSDate *)exifDate latitude:(NSString*)latitude longitude:(NSString*)longitude
{
    // If exists already geocoder data in TableGPS exit
    if ([[NCManageDatabase sharedInstance] getLocationFromGeoLatitude:latitude longitude:longitude])
        return;
    
    CLGeocoder *geocoder = [[CLGeocoder alloc] init];
    CLLocation *location = [[CLLocation alloc] initWithLatitude:[latitude doubleValue] longitude:[longitude doubleValue]];
    
    [geocoder reverseGeocodeLocation:location completionHandler:^(NSArray *placemarks, NSError *error) {
        
        //DDLogInfo(@"[LOG] Found placemarks: %@, error: %@", placemarks, error);
        
        if (error == nil && [placemarks count] > 0) {
            
            CLPlacemark *placemark = [placemarks lastObject];
            
            NSString *thoroughfare = @"";
            NSString *postalCode = @"";
            NSString *locality = @"";
            NSString *administrativeArea = @"";
            NSString *country = @"";
            
            if (placemark.thoroughfare) thoroughfare = placemark.thoroughfare;
            if (placemark.postalCode) postalCode = placemark.postalCode;
            if (placemark.locality) locality = placemark.locality;
            if (placemark.administrativeArea) administrativeArea = placemark.administrativeArea;
            if (placemark.country) country = placemark.country;
            
            NSString *location = [NSString stringWithFormat:@"%@ %@ %@ %@ %@", thoroughfare, postalCode, locality, administrativeArea, country];
            location = [location stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
            
            // GPS
            if ([location length] > 0) {
                
                [[NCManageDatabase sharedInstance] addGeocoderLocation:location placemarkAdministrativeArea:placemark.administrativeArea placemarkCountry:placemark.country placemarkLocality:placemark.locality placemarkPostalCode:placemark.postalCode placemarkThoroughfare:placemark.thoroughfare latitude:latitude longitude:longitude];
                
                NSDictionary *dictionary = [[NSDictionary alloc] initWithObjectsAndKeys:exifDate, ocId, nil];
                
                // Notify for CCDetail
                [[NSNotificationCenter defaultCenter] postNotificationOnMainThreadName:@"insertGeocoderLocation" object:nil userInfo:dictionary];
            }
        } else {
            //NSLog(@"[LOG] setGeocoderocId : %@", error.debugDescription);
        }
    }];
}

@end