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136 lines
4.4 KiB
Objective-C
136 lines
4.4 KiB
Objective-C
//
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// LocationModel.m
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// ASDKgram
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//
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// Created by Hannah Troisi on 2/26/16.
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// Copyright © 2016 Hannah Troisi. All rights reserved.
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//
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#import "LocationModel.h"
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#import <CoreLocation/CLGeocoder.h>
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@implementation LocationModel
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{
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BOOL _placemarkFetchInProgress;
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void (^_placemarkCallbackBlock)(LocationModel *);
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}
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#pragma mark - Lifecycle
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- (nullable instancetype)initWith500pxPhoto:(NSDictionary *)dictionary
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{
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NSNumber *latitude = [dictionary objectForKey:@"latitude"];
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NSNumber *longitude = [dictionary objectForKey:@"longitude"];
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// early return if location is "<null>"
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if (![latitude isKindOfClass:[NSNumber class]] || ![longitude isKindOfClass:[NSNumber class]]) {
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return nil;
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}
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self = [super init];
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if (self) {
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// set coordiantes
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_coordinates = CLLocationCoordinate2DMake([latitude floatValue], [longitude floatValue]);
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// get CLPlacemark with MKReverseGeocoder
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[self beginReverseGeocodingLocationFromCoordinates];
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}
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return self;
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}
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#pragma mark - Instance Methods
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// return location placemark if fetched, else set completion block for fetch finish
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- (void)reverseGeocodedLocationWithCompletionBlock:(void (^)(LocationModel *))blockName
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{
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if (_placemark) {
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// call block if placemark already fetched
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if (blockName) {
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blockName(self);
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}
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} else {
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// set placemark reverse geocoding completion block
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_placemarkCallbackBlock = blockName;
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// if fetch not in progress, begin
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if (!_placemarkFetchInProgress) {
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[self beginReverseGeocodingLocationFromCoordinates];
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}
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}
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}
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#pragma mark - Helper Methods
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- (void)beginReverseGeocodingLocationFromCoordinates
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{
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if (_placemarkFetchInProgress) {
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return;
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}
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_placemarkFetchInProgress = YES;
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CLLocation *location = [[CLLocation alloc] initWithLatitude:_coordinates.latitude longitude:_coordinates.longitude];
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CLGeocoder *geocoder = [[CLGeocoder alloc] init];
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[geocoder reverseGeocodeLocation:location completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {
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// completion handler gets called on main thread
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_placemark = [placemarks lastObject];
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_locationString = [self locationStringFromCLPlacemark];
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// check if completion block set, call it - DO NOT CALL A NIL BLOCK!
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if (_placemarkCallbackBlock) {
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// call the block with arguments
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_placemarkCallbackBlock(self);
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}
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}];
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}
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- (nullable NSString *)locationStringFromCLPlacemark
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{
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// early return if no location info
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if (!_placemark)
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{
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return nil;
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}
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// @property (nonatomic, readonly, copy, nullable) NSString *name; // eg. Apple Inc.
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// @property (nonatomic, readonly, copy, nullable) NSString *thoroughfare; // street name, eg. Infinite Loop
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// @property (nonatomic, readonly, copy, nullable) NSString *subThoroughfare; // eg. 1
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// @property (nonatomic, readonly, copy, nullable) NSString *locality; // city, eg. Cupertino
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// @property (nonatomic, readonly, copy, nullable) NSString *subLocality; // neighborhood, common name, eg. Mission District
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// @property (nonatomic, readonly, copy, nullable) NSString *administrativeArea; // state, eg. CA
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// @property (nonatomic, readonly, copy, nullable) NSString *subAdministrativeArea; // county, eg. Santa Clara
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// @property (nonatomic, readonly, copy, nullable) NSString *postalCode; // zip code, eg. 95014
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// @property (nonatomic, readonly, copy, nullable) NSString *ISOcountryCode; // eg. US
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// @property (nonatomic, readonly, copy, nullable) NSString *country; // eg. United States
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// @property (nonatomic, readonly, copy, nullable) NSString *inlandWater; // eg. Lake Tahoe
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// @property (nonatomic, readonly, copy, nullable) NSString *ocean; // eg. Pacific Ocean
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// @property (nonatomic, readonly, copy, nullable) NSArray<NSString *> *areasOfInterest; // eg. Golden Gate Park
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NSString *locationString;
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if (_placemark.inlandWater) {
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locationString = _placemark.inlandWater;
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} else if (_placemark.subLocality && _placemark.locality) {
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locationString = [NSString stringWithFormat:@"%@, %@", _placemark.subLocality, _placemark.locality];
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} else if (_placemark.administrativeArea && _placemark.subAdministrativeArea) {
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locationString = [NSString stringWithFormat:@"%@, %@", _placemark.subAdministrativeArea, _placemark.administrativeArea];
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} else if (_placemark.country) {
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locationString = _placemark.country;
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} else {
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locationString = @"ERROR";
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}
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return locationString;
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}
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@end
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