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@@ -1,9 +1,105 @@
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-//
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-// LocationManager.swift
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-// deltachat-ios
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-//
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-// Created by Macci on 09.03.20.
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-// Copyright © 2020 Jonas Reinsch. All rights reserved.
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-//
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-
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import Foundation
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+import CoreLocation
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+
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+class LocationManager: NSObject, CLLocationManagerDelegate {
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+
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+ let locationManager: CLLocationManager
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+ let dcContext: DcContext
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+ var lastLocation: CLLocation?
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+
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+ init(context: DcContext) {
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+ dcContext = context
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+ locationManager = CLLocationManager()
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+ locationManager.distanceFilter = 50
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+ locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters
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+ //locationManager.allowsBackgroundLocationUpdates = true
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+ locationManager.pausesLocationUpdatesAutomatically = true
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+ //TODO: check which activity Type is needed
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+ locationManager.activityType = CLActivityType.other
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+ super.init()
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+ locationManager.delegate = self
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+
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+ }
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+
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+ func shareLocation(chatId: Int, duration: Int) {
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+ dcContext.sendLocationsToChat(chatId: chatId, seconds: duration)
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+ if duration > 0 {
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+ startLocationTracking()
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+ } else {
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+ stopLocationTracking()
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+ }
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+ }
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+
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+ func startLocationTracking() {
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+ locationManager.requestAlwaysAuthorization()
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+ locationManager.startUpdatingLocation()
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+
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+ }
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+
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+ func stopLocationTracking() {
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+ locationManager.stopUpdatingLocation()
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+
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+ }
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+
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+ func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
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+ logger.debug("LOCATION: didUpdateLocations")
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+
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+ guard let newLocation = locations.last else {
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+ logger.debug("LOCATION: new location is emtpy")
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+ return
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+ }
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+
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+ let isBetter = isBetterLocation(newLocation: newLocation, lastLocation: lastLocation)
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+ logger.debug("LOCATION: isBetterLocation: \(isBetter)")
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+ if isBetter {
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+ dcContext.setLocation(latitude: newLocation.coordinate.latitude, longitude: newLocation.coordinate.longitude, accuracy: newLocation.horizontalAccuracy)
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+ lastLocation = newLocation
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+ }
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+ }
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+
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+ func isBetterLocation(newLocation: CLLocation, lastLocation: CLLocation?) -> Bool {
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+ guard let lastLocation = lastLocation else {
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+ return !isNewLocationOutdated(newLocation: newLocation) && hasValidAccuracy(newLocation: newLocation)
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+ }
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+
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+ return !isNewLocationOutdated(newLocation: newLocation) &&
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+ hasValidAccuracy(newLocation: newLocation) &&
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+ (isSignificantlyMoreAccurate(newLocation: newLocation, lastLocation: lastLocation) ||
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+ isMoreAccurate(newLocation: newLocation, lastLocation: lastLocation) && hasLocationChanged(newLocation: newLocation, lastLocation: lastLocation) ||
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+ hasLocationSignificantlyChanged(newLocation: newLocation, lastLocation: lastLocation))
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+ }
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+
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+ func hasValidAccuracy(newLocation: CLLocation) -> Bool {
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+ logger.debug("LOCATION: hasValidAccuracy: \(newLocation.horizontalAccuracy > 0)")
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+ return newLocation.horizontalAccuracy > 0
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+ }
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+
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+ func isSignificantlyMoreAccurate(newLocation: CLLocation, lastLocation: CLLocation) -> Bool {
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+ logger.debug("LOCATION isSignificantlyMoreAccurate: \(lastLocation.horizontalAccuracy - newLocation.horizontalAccuracy > 25)")
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+ return lastLocation.horizontalAccuracy - newLocation.horizontalAccuracy > 25
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+ }
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+
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+ func isMoreAccurate(newLocation: CLLocation, lastLocation: CLLocation) -> Bool {
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+ logger.debug("LOCATION: isMoreAccurate \(lastLocation.horizontalAccuracy - newLocation.horizontalAccuracy > 0)")
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+ return lastLocation.horizontalAccuracy - newLocation.horizontalAccuracy > 0
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+ }
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+
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+ func hasLocationChanged(newLocation: CLLocation, lastLocation: CLLocation) -> Bool {
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+ logger.debug("LOCATION: hasLocationChanged \(newLocation.distance(from: lastLocation) > 10)")
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+ return newLocation.distance(from: lastLocation) > 10
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+ }
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+
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+ func hasLocationSignificantlyChanged(newLocation: CLLocation, lastLocation: CLLocation) -> Bool {
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+ logger.debug("LOCATION: hasLocationSignificantlyChanged \(newLocation.distance(from: lastLocation) > 30)")
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+ return newLocation.distance(from: lastLocation) > 30
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+ }
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+
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+ /**
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+ Locations can be cached by iOS, timestamp comparison checks if the location has been tracked within the last 5 minutes
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+ */
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+ func isNewLocationOutdated(newLocation: CLLocation) -> Bool{
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+ let timeDelta = DateUtils.getRelativeTimeInSeconds(timeStamp: Double(newLocation.timestamp.timeIntervalSince1970))
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+ return timeDelta < Double(Time.fiveMinutes)
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+ }
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+
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+}
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cyberta