/*

     File: MapViewController.m

 Abstract: Controls the map view and manages the reverse geocoder to get the current address.

  Version: 1.4

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 */

#import "MapViewController.h"

#import "PlacemarkViewController.h"

@interface MapViewController ()

@property (nonatomic, weak) IBOutlet MKMapView *mapView;

@property (nonatomic, weak) IBOutlet UIBarButtonItem *getAddressButton;

@property (nonatomic, strong) CLGeocoder *geocoder;

@property (nonatomic, strong) MKPlacemark *placemark;

@end

@implementation MapViewController

- (void)viewDidLoad

{

    [super viewDidLoad];

    // Create a geocoder and save it for later.

    self.geocoder = [[CLGeocoder alloc] init];

}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender

{

    if ([segue.identifier isEqualToString:@"pushToDetail"])

    {

        // Get the destination view controller and set the placemark data that it should display.

        PlacemarkViewController *viewController = segue.destinationViewController;

        viewController.placemark = self.placemark;

    }

}

- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation

{

    // Center the map the first time we get a real location change.

    static dispatch_once_t centerMapFirstTime;

    if ((userLocation.coordinate.latitude != 0.0) && (userLocation.coordinate.longitude != 0.0)) {

        dispatch_once(&centerMapFirstTime, ^{

            [self.mapView setCenterCoordinate:userLocation.coordinate animated:YES];

        });

    }

    // Lookup the information for the current location of the user.

    [self.geocoder reverseGeocodeLocation:self.mapView.userLocation.location completionHandler:^(NSArray *placemarks, NSError *error) {

        if ((placemarks != nil) && (placemarks.count > 0)) {

            // If the placemark is not nil then we have at least one placemark. Typically there will only be one.

            _placemark = [placemarks objectAtIndex:0];

            // we have received our current location, so enable the "Get Current Address" button

            [self.getAddressButton setEnabled:YES];

        }

        else {

            // Handle the nil case if necessary.

        }

    }];

}

@end