Add geofence service preference

app/src/generic/res/values/keys.xml

@@ -8,4 +8,5 @@
   <string name="support_email">support@tasks.org</string>
   <string name="default_reverse_geocoder">1</string> <!-- Nominatim -->
   <string name="default_maps">1</string> <!-- OpenStreetMaps -->
+  <string name="default_geofence_service">1</string> <!-- Android LocationManager -->
 </resources>

app/src/googleplay/res/values/keys.xml

@@ -8,4 +8,5 @@
   <string name="support_email">play-support@tasks.org</string>
   <string name="default_reverse_geocoder">0</string> <!-- Mapbox -->
   <string name="default_maps">0</string> <!-- Google Maps -->
+  <string name="default_geofence_service">0</string> <!-- Google Play Location Services -->
 </resources>

app/src/main/java/org/tasks/location/GeofenceApi.kt

@@ -13,6 +13,8 @@ class GeofenceApi @Inject constructor(
 ) {
     suspend fun registerAll() = locationDao.getPlacesWithGeofences().forEach { update(it) }
 
+    suspend fun cancelAll() = locationDao.getPlacesWithGeofences().forEach { cancel(it) }
+
     suspend fun update(taskId: Long) = update(locationDao.getPlaceForTask(taskId))
 
     suspend fun update(place: String) = update(locationDao.getPlace(place))
@@ -26,9 +28,11 @@ class GeofenceApi @Inject constructor(
                     Timber.d("Adding geofence for %s", it)
                     client.addGeofences(it)
                 }
-                ?: place.let {
-                    Timber.d("Removing geofence for %s", it)
-                    client.removeGeofences(it)
+                ?: cancel(place)
     }
+
+    private fun cancel(place: Place?) = place?.let {
+        Timber.d("Removing geofence for %s", place)
+        client.removeGeofences(place)
     }
 }

app/src/main/java/org/tasks/location/LocationPermissionDialog.kt

@@ -1,7 +1,9 @@
 package org.tasks.location
 
+import android.app.Activity.RESULT_CANCELED
 import android.app.Activity.RESULT_OK
 import android.app.Dialog
+import android.content.DialogInterface
 import android.content.Intent
 import android.net.Uri
 import android.os.Bundle
@@ -52,9 +54,7 @@ class LocationPermissionDialog : DialogFragment() {
 
         return dialogBuilder.newDialog(R.string.missing_permissions)
                 .setView(binding.root)
-                .setNegativeButton(R.string.cancel) { _, _ ->
-                    dismiss()
-                }
+                .setNegativeButton(R.string.cancel) { dialog, _ -> dialog.cancel() }
                 .setNeutralButton(R.string.TLA_menu_settings) { _, _ ->
                     startActivity(Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS).apply {
                         addCategory(Intent.CATEGORY_DEFAULT)
@@ -88,6 +88,10 @@ class LocationPermissionDialog : DialogFragment() {
         }
     }
 
+    override fun onCancel(dialog: DialogInterface) {
+        targetFragment?.onActivityResult(targetRequestCode, RESULT_CANCELED, null)
+    }
+
     companion object {
         fun newLocationPermissionDialog(
                 targetFragment: Fragment,

app/src/main/java/org/tasks/preferences/fragments/LocationPreferences.kt

@@ -1,13 +1,23 @@
 package org.tasks.preferences.fragments
 
+import android.content.Intent
 import android.os.Bundle
+import androidx.lifecycle.lifecycleScope
 import androidx.preference.Preference
+import androidx.preference.SwitchPreference
 import dagger.hilt.android.AndroidEntryPoint
+import kotlinx.coroutines.NonCancellable
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 import org.tasks.R
 import org.tasks.Tasks.Companion.IS_GOOGLE_PLAY
 import org.tasks.billing.Inventory
 import org.tasks.gtasks.PlayServices
 import org.tasks.injection.InjectingPreferenceFragment
+import org.tasks.location.GeofenceApi
+import org.tasks.location.LocationPermissionDialog.Companion.newLocationPermissionDialog
+import org.tasks.preferences.PermissionChecker
+import org.tasks.preferences.Preferences
 import org.tasks.ui.Toaster
 import javax.inject.Inject
 
@@ -17,6 +27,9 @@ class LocationPreferences : InjectingPreferenceFragment() {
     @Inject lateinit var playServices: PlayServices
     @Inject lateinit var inventory: Inventory
     @Inject lateinit var toaster: Toaster
+    @Inject lateinit var geofenceApi: GeofenceApi
+    @Inject lateinit var permissionChecker: PermissionChecker
+    @Inject lateinit var preferences: Preferences
 
     override fun getPreferenceXml() = R.xml.preferences_location
 
@@ -24,14 +37,40 @@ class LocationPreferences : InjectingPreferenceFragment() {
         if (IS_GOOGLE_PLAY) {
             findPreference(R.string.p_place_provider)
                     .setOnPreferenceChangeListener(this::onPlaceSearchChanged)
+            findPreference(R.string.p_geofence_service)
+                    .setOnPreferenceChangeListener(this::onGeofenceServiceChanged)
         } else {
             disable(
                     R.string.p_map_tiles,
                     R.string.p_place_provider,
+                    R.string.p_geofence_service
             )
         }
     }
 
+    override fun onResume() {
+        super.onResume()
+
+        updatePermissions()
+    }
+
+    private fun updatePermissions() {
+        val hasPermissions = permissionChecker.canAccessBackgroundLocation()
+        preferences.setBoolean(R.string.p_location_based_reminders, hasPermissions)
+        with((findPreference(R.string.p_location_based_reminders) as SwitchPreference)) {
+            isChecked = hasPermissions
+            isEnabled = !hasPermissions
+            setOnPreferenceClickListener {
+                if (!permissionChecker.canAccessBackgroundLocation()) {
+                    newLocationPermissionDialog(this@LocationPreferences, REQUEST_BACKGROUND_LOCATION)
+                            .show(parentFragmentManager, FRAG_TAG_LOCATION_PERMISSION)
+                }
+                false
+            }
+        }
+        findPreference(R.string.p_geofence_service).isEnabled = hasPermissions && IS_GOOGLE_PLAY
+    }
+
     private fun onPlaceSearchChanged(preference: Preference, newValue: Any): Boolean =
             if (newValue.toString().toIntOrNull() ?: 0 == 1) {
                 if (!playServices.refreshAndCheck()) {
@@ -46,4 +85,37 @@ class LocationPreferences : InjectingPreferenceFragment() {
             } else {
                 true
             }
+
+    private fun onGeofenceServiceChanged(preference: Preference, newValue: Any): Boolean =
+            if (newValue.toString().toIntOrNull() ?: 0 == 1) {
+                if (!playServices.refreshAndCheck()) {
+                    playServices.resolve(activity)
+                    false
+                } else {
+                    geofenceChanged()
+                }
+            } else {
+                geofenceChanged()
+            }
+
+    private fun geofenceChanged(): Boolean {
+        lifecycleScope.launch {
+            withContext(NonCancellable) {
+                geofenceApi.cancelAll()
+            }
+            showRestartDialog()
+        }
+        return true
+    }
+
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) =
+            when (requestCode) {
+                REQUEST_BACKGROUND_LOCATION -> updatePermissions()
+                else -> super.onActivityResult(requestCode, resultCode, data)
+            }
+
+    companion object {
+        private const val FRAG_TAG_LOCATION_PERMISSION = "frag_tag_location_permissions"
+        private const val REQUEST_BACKGROUND_LOCATION = 10101
+    }
 }

app/src/main/res/values/arrays.xml

@@ -301,4 +301,14 @@
     <item>0</item>
     <item>1</item>
   </string-array>
+
+  <string-array name="geofence_service_names">
+    <item>@string/google_play_location_service</item>
+    <item>@string/android_location_services</item>
+  </string-array>
+
+  <string-array name="geofence_service_values">
+    <item>0</item>
+    <item>1</item>
+  </string-array>
 </resources>

app/src/main/res/values/keys.xml

@@ -403,6 +403,8 @@
   <string name="openstreetmap">OpenStreetMap</string>
   <string name="android">Android</string>
   <string name="p_place_provider">place_provider_v2</string>
+  <string name="p_location_based_reminders">location_based_reminders</string>
+  <string name="p_geofence_service">geofence_service</string>
   <string name="preference_screen">preference_screen</string>
   <string name="p_add_to_top">google_tasks_add_to_top</string>
   <string name="p_google_tasks_position_hack">google_tasks_position_hack</string>

app/src/main/res/values/strings.xml

@@ -703,4 +703,8 @@ File %1$s contained %2$s.\n\n
   <string name="maps">Maps</string>
   <string name="map_tiles">Map tiles</string>
   <string name="map_theme_use_app_theme">Use app theme</string>
+  <string name="location_based_reminders">Location-based reminders</string>
+  <string name="geofence_service">Geofence service</string>
+  <string name="google_play_location_service">Google Play location service</string>
+  <string name="android_location_services">Android location service</string>
 </resources>

app/src/main/res/xml/preferences_location.xml

@@ -2,6 +2,24 @@
 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
   android:key="@string/preference_screen">
 
+  <PreferenceCategory
+    android:title="@string/location_based_reminders">
+
+    <SwitchPreference
+      android:defaultValue="false"
+      android:key="@string/p_location_based_reminders"
+      android:title="@string/enabled" />
+
+    <ListPreference
+      android:defaultValue="@string/default_geofence_service"
+      android:key="@string/p_geofence_service"
+      android:title="@string/geofence_service"
+      android:entries="@array/geofence_service_names"
+      android:entryValues="@array/geofence_service_values"
+      android:summary="%s" />
+
+  </PreferenceCategory>
+
   <PreferenceCategory
     android:key="@string/maps"
     android:title="@string/maps">