2015-03-23 20:28:42 +00:00
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/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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2015-03-09 10:04:44 +00:00
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#import "RCTLocationObserver.h"
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#import <CoreLocation/CLError.h>
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#import <CoreLocation/CLLocationManager.h>
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#import <CoreLocation/CLLocationManagerDelegate.h>
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#import "RCTAssert.h"
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#import "RCTBridge.h"
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#import "RCTConvert.h"
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#import "RCTEventDispatcher.h"
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#import "RCTLog.h"
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typedef NS_ENUM(NSInteger, RCTPositionErrorCode) {
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RCTPositionErrorDenied = 1,
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RCTPositionErrorUnavailable,
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RCTPositionErrorTimeout,
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};
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#define RCT_DEFAULT_LOCATION_ACCURACY kCLLocationAccuracyHundredMeters
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typedef struct {
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2015-05-02 21:11:09 +00:00
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double timeout;
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double maximumAge;
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double accuracy;
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2015-03-09 10:04:44 +00:00
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} RCTLocationOptions;
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2015-04-18 17:43:20 +00:00
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@implementation RCTConvert (RCTLocationOptions)
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+ (RCTLocationOptions)RCTLocationOptions:(id)json
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2015-03-09 10:04:44 +00:00
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{
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NSDictionary *options = [RCTConvert NSDictionary:json];
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return (RCTLocationOptions){
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.timeout = [RCTConvert NSTimeInterval:options[@"timeout"]] ?: INFINITY,
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.maximumAge = [RCTConvert NSTimeInterval:options[@"maximumAge"]] ?: INFINITY,
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.accuracy = [RCTConvert BOOL:options[@"enableHighAccuracy"]] ? kCLLocationAccuracyBest : RCT_DEFAULT_LOCATION_ACCURACY
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};
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}
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2015-04-18 17:43:20 +00:00
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@end
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2015-03-09 10:04:44 +00:00
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static NSDictionary *RCTPositionError(RCTPositionErrorCode code, NSString *msg /* nil for default */)
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{
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if (!msg) {
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switch (code) {
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case RCTPositionErrorDenied:
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msg = @"User denied access to location services.";
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break;
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case RCTPositionErrorUnavailable:
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msg = @"Unable to retrieve location.";
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break;
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case RCTPositionErrorTimeout:
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msg = @"The location request timed out.";
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break;
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}
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}
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return @{
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@"code": @(code),
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@"message": msg,
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@"PERMISSION_DENIED": @(RCTPositionErrorDenied),
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@"POSITION_UNAVAILABLE": @(RCTPositionErrorUnavailable),
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@"TIMEOUT": @(RCTPositionErrorTimeout)
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};
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}
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@interface RCTLocationRequest : NSObject
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@property (nonatomic, copy) RCTResponseSenderBlock successBlock;
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@property (nonatomic, copy) RCTResponseSenderBlock errorBlock;
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@property (nonatomic, assign) RCTLocationOptions options;
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@property (nonatomic, strong) NSTimer *timeoutTimer;
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@end
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@implementation RCTLocationRequest
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- (void)dealloc
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{
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2015-05-26 21:54:32 +00:00
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if (_timeoutTimer.valid) {
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[_timeoutTimer invalidate];
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}
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2015-03-09 10:04:44 +00:00
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}
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@end
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@interface RCTLocationObserver () <CLLocationManagerDelegate>
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@end
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@implementation RCTLocationObserver
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{
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CLLocationManager *_locationManager;
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NSDictionary *_lastLocationEvent;
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NSMutableArray *_pendingRequests;
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BOOL _observingLocation;
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RCTLocationOptions _observerOptions;
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}
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2015-04-08 12:42:43 +00:00
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RCT_EXPORT_MODULE()
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2015-03-09 10:04:44 +00:00
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@synthesize bridge = _bridge;
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#pragma mark - Lifecycle
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- (instancetype)init
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{
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if ((self = [super init])) {
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2015-08-17 14:35:34 +00:00
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_locationManager = [CLLocationManager new];
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2015-03-09 10:04:44 +00:00
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_locationManager.distanceFilter = RCT_DEFAULT_LOCATION_ACCURACY;
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_locationManager.delegate = self;
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2015-08-17 14:35:34 +00:00
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_pendingRequests = [NSMutableArray new];
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2015-03-09 10:04:44 +00:00
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}
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return self;
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}
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- (void)dealloc
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{
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[_locationManager stopUpdatingLocation];
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2015-04-18 17:43:20 +00:00
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_locationManager.delegate = nil;
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2015-03-09 10:04:44 +00:00
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}
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2015-04-20 19:06:02 +00:00
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- (dispatch_queue_t)methodQueue
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{
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return dispatch_get_main_queue();
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}
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2015-03-09 10:04:44 +00:00
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#pragma mark - Private API
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- (void)beginLocationUpdates
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{
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// Request location access permission
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if ([_locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]) {
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[_locationManager requestWhenInUseAuthorization];
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}
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// Start observing location
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[_locationManager startUpdatingLocation];
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}
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#pragma mark - Timeout handler
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- (void)timeout:(NSTimer *)timer
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{
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RCTLocationRequest *request = timer.userInfo;
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NSString *message = [NSString stringWithFormat: @"Unable to fetch location within %zds.", (NSInteger)(timer.timeInterval * 1000.0)];
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request.errorBlock(@[RCTPositionError(RCTPositionErrorTimeout, message)]);
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[_pendingRequests removeObject:request];
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// Stop updating if no pending requests
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if (_pendingRequests.count == 0 && !_observingLocation) {
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[_locationManager stopUpdatingLocation];
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}
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}
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#pragma mark - Public API
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2015-04-27 10:58:30 +00:00
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RCT_EXPORT_METHOD(startObserving:(RCTLocationOptions)options)
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2015-03-09 10:04:44 +00:00
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{
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2015-04-09 04:47:06 +00:00
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[self checkLocationConfig];
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2015-04-18 17:43:20 +00:00
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// Select best options
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2015-04-27 10:58:30 +00:00
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_observerOptions = options;
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2015-04-18 17:43:20 +00:00
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for (RCTLocationRequest *request in _pendingRequests) {
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_observerOptions.accuracy = MIN(_observerOptions.accuracy, request.options.accuracy);
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}
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2015-03-09 10:04:44 +00:00
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2015-04-18 17:43:20 +00:00
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_locationManager.desiredAccuracy = _observerOptions.accuracy;
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[self beginLocationUpdates];
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_observingLocation = YES;
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2015-03-09 10:04:44 +00:00
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}
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2015-04-08 15:52:48 +00:00
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RCT_EXPORT_METHOD(stopObserving)
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2015-03-09 10:04:44 +00:00
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{
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// Stop observing
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_observingLocation = NO;
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2015-03-09 10:04:44 +00:00
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2015-04-18 17:43:20 +00:00
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// Stop updating if no pending requests
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if (_pendingRequests.count == 0) {
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[_locationManager stopUpdatingLocation];
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}
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2015-03-09 10:04:44 +00:00
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}
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2015-04-27 10:58:30 +00:00
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RCT_EXPORT_METHOD(getCurrentPosition:(RCTLocationOptions)options
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withSuccessCallback:(RCTResponseSenderBlock)successBlock
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errorCallback:(RCTResponseSenderBlock)errorBlock)
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{
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2015-04-09 04:47:06 +00:00
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[self checkLocationConfig];
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2015-03-09 10:04:44 +00:00
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if (!successBlock) {
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RCTLogError(@"%@.getCurrentPosition called with nil success parameter.", [self class]);
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return;
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}
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2015-04-18 17:43:20 +00:00
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if (![CLLocationManager locationServicesEnabled]) {
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if (errorBlock) {
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errorBlock(@[
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RCTPositionError(RCTPositionErrorUnavailable, @"Location services disabled.")
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]);
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return;
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2015-03-09 10:04:44 +00:00
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}
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}
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2015-03-09 10:04:44 +00:00
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2015-04-18 17:43:20 +00:00
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if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusDenied) {
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if (errorBlock) {
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errorBlock(@[
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RCTPositionError(RCTPositionErrorDenied, nil)
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]);
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return;
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2015-03-09 10:04:44 +00:00
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}
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2015-04-18 17:43:20 +00:00
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}
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2015-03-09 10:04:44 +00:00
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2015-04-18 17:43:20 +00:00
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// Check if previous recorded location exists and is good enough
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if (_lastLocationEvent &&
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CFAbsoluteTimeGetCurrent() - [RCTConvert NSTimeInterval:_lastLocationEvent[@"timestamp"]] < options.maximumAge &&
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[_lastLocationEvent[@"coords"][@"accuracy"] doubleValue] >= options.accuracy) {
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2015-03-09 10:04:44 +00:00
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2015-04-18 17:43:20 +00:00
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// Call success block with most recent known location
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successBlock(@[_lastLocationEvent]);
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return;
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}
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2015-03-09 10:04:44 +00:00
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2015-04-18 17:43:20 +00:00
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// Create request
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RCTLocationRequest *request = [RCTLocationRequest new];
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2015-04-18 17:43:20 +00:00
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request.successBlock = successBlock;
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request.errorBlock = errorBlock ?: ^(NSArray *args){};
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request.options = options;
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request.timeoutTimer = [NSTimer scheduledTimerWithTimeInterval:options.timeout
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target:self
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selector:@selector(timeout:)
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userInfo:request
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repeats:NO];
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[_pendingRequests addObject:request];
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// Configure location manager and begin updating location
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_locationManager.desiredAccuracy = MIN(_locationManager.desiredAccuracy, options.accuracy);
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[self beginLocationUpdates];
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2015-03-09 10:04:44 +00:00
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}
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#pragma mark - CLLocationManagerDelegate
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- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
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{
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// Create event
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CLLocation *location = [locations lastObject];
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_lastLocationEvent = @{
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@"coords": @{
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@"latitude": @(location.coordinate.latitude),
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@"longitude": @(location.coordinate.longitude),
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@"altitude": @(location.altitude),
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@"accuracy": @(location.horizontalAccuracy),
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@"altitudeAccuracy": @(location.verticalAccuracy),
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@"heading": @(location.course),
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@"speed": @(location.speed),
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},
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@"timestamp": @(CFAbsoluteTimeGetCurrent() * 1000.0) // in ms
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};
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// Send event
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if (_observingLocation) {
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[_bridge.eventDispatcher sendDeviceEventWithName:@"geolocationDidChange"
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body:_lastLocationEvent];
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}
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// Fire all queued callbacks
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for (RCTLocationRequest *request in _pendingRequests) {
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request.successBlock(@[_lastLocationEvent]);
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2015-05-26 21:54:32 +00:00
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[request.timeoutTimer invalidate];
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2015-03-09 10:04:44 +00:00
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}
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[_pendingRequests removeAllObjects];
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// Stop updating if not not observing
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if (!_observingLocation) {
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[_locationManager stopUpdatingLocation];
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}
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// Reset location accuracy
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_locationManager.desiredAccuracy = RCT_DEFAULT_LOCATION_ACCURACY;
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}
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- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
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{
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// Check error type
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NSDictionary *jsError = nil;
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switch (error.code) {
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case kCLErrorDenied:
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jsError = RCTPositionError(RCTPositionErrorDenied, nil);
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break;
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case kCLErrorNetwork:
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jsError = RCTPositionError(RCTPositionErrorUnavailable, @"Unable to retrieve location due to a network failure");
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break;
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case kCLErrorLocationUnknown:
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default:
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jsError = RCTPositionError(RCTPositionErrorUnavailable, nil);
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break;
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}
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// Send event
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if (_observingLocation) {
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[_bridge.eventDispatcher sendDeviceEventWithName:@"geolocationError"
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body:jsError];
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}
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// Fire all queued error callbacks
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for (RCTLocationRequest *request in _pendingRequests) {
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request.errorBlock(@[jsError]);
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2015-05-26 21:54:32 +00:00
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[request.timeoutTimer invalidate];
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2015-03-09 10:04:44 +00:00
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}
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[_pendingRequests removeAllObjects];
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// Reset location accuracy
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_locationManager.desiredAccuracy = RCT_DEFAULT_LOCATION_ACCURACY;
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}
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2015-04-09 04:47:06 +00:00
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- (void)checkLocationConfig
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{
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if (![[NSBundle mainBundle] objectForInfoDictionaryKey:@"NSLocationWhenInUseUsageDescription"]) {
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RCTLogError(@"NSLocationWhenInUseUsageDescription key must be present in Info.plist to use geolocation.");
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}
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}
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2015-03-09 10:04:44 +00:00
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@end
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