- Unifies Location Flows and GeoHash Flows into one

- Make them react to changing location permissions
- Adds UI for when the location permission is rejected.

amethyst/src/main/java/com/vitorpamplona/amethyst/model/Account.kt

@@ -20,7 +20,6 @@
  */
 package com.vitorpamplona.amethyst.model
 
-import android.location.Location
 import android.util.Log
 import androidx.compose.runtime.Immutable
 import androidx.compose.runtime.Stable
@@ -29,10 +28,10 @@ import androidx.lifecycle.asLiveData
 import androidx.lifecycle.liveData
 import androidx.lifecycle.switchMap
 import com.fasterxml.jackson.module.kotlin.readValue
-import com.fonfon.kgeohash.toGeoHash
 import com.vitorpamplona.amethyst.Amethyst
 import com.vitorpamplona.amethyst.BuildConfig
 import com.vitorpamplona.amethyst.service.FileHeader
+import com.vitorpamplona.amethyst.service.LocationState
 import com.vitorpamplona.amethyst.service.NostrLnZapPaymentResponseDataSource
 import com.vitorpamplona.amethyst.service.checkNotInMainThread
 import com.vitorpamplona.amethyst.tryAndWait
@@ -170,7 +169,7 @@ class Account(
         val listName: String,
         val peopleList: StateFlow<NoteState> = MutableStateFlow(NoteState(Note(" "))),
         val kind3: StateFlow<Account.LiveFollowList?> = MutableStateFlow(null),
-        val location: StateFlow<Location?> = MutableStateFlow(null),
+        val location: StateFlow<LocationState.LocationResult?> = MutableStateFlow(null),
     )
 
     val connectToRelaysFlow =
@@ -541,7 +540,7 @@ class Account(
             AROUND_ME ->
                 FeedsBaseFlows(
                     listName,
-                    location = Amethyst.instance.locationManager.locationStateFlow,
+                    location = Amethyst.instance.locationManager.geohashStateFlow,
                 )
             else -> {
                 val note = LocalCache.checkGetOrCreateAddressableNote(listName)
@@ -563,19 +562,19 @@ class Account(
         listName: String,
         kind3: LiveFollowList?,
         noteState: NoteState,
-        location: Location?,
+        location: LocationState.LocationResult?,
     ): LiveFollowList? =
         if (listName == GLOBAL_FOLLOWS) {
             null
         } else if (listName == KIND3_FOLLOWS) {
             kind3
         } else if (listName == AROUND_ME) {
-            val hash = location?.toGeoHash(com.vitorpamplona.amethyst.ui.actions.GeohashPrecision.KM_5_X_5.digits)
+            val geohashResult = location ?: Amethyst.instance.locationManager.geohashStateFlow.value
-            if (hash != null) {
+            if (geohashResult is LocationState.LocationResult.Success) {
                 // 2 neighbors deep = 25x25km
                 val hashes =
-                    listOf(hash.toString()) +
+                    listOf(geohashResult.geoHash.toString()) +
-                        hash.adjacent
+                        geohashResult.geoHash.adjacent
                             .map { listOf(it.toString()) + it.adjacent.map { it.toString() } }
                             .flatten()
                             .distinct()

amethyst/src/main/java/com/vitorpamplona/amethyst/service/LocationState.kt

@@ -26,21 +26,28 @@ import android.location.Geocoder
 import android.location.Location
 import android.location.LocationListener
 import android.location.LocationManager
+import android.os.Build
 import android.os.Looper
 import android.util.Log
 import android.util.LruCache
+import com.fonfon.kgeohash.GeoHash
 import com.fonfon.kgeohash.toGeoHash
 import com.vitorpamplona.amethyst.service.LocationState.Companion.MIN_DISTANCE
 import com.vitorpamplona.amethyst.service.LocationState.Companion.MIN_TIME
 import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.channels.awaitClose
 import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.callbackFlow
+import kotlinx.coroutines.flow.catch
+import kotlinx.coroutines.flow.emitAll
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.onEach
 import kotlinx.coroutines.flow.stateIn
+import kotlinx.coroutines.flow.transformLatest
 import kotlinx.coroutines.launch
 
 class LocationFlow(
@@ -90,27 +97,48 @@ class LocationState(
         const val MIN_DISTANCE: Float = 100.0f
     }
 
-    private var latestLocation: Location = Location(LocationManager.NETWORK_PROVIDER)
+    sealed class LocationResult {
+        data class Success(
+            val geoHash: GeoHash,
+        ) : LocationResult()
 
-    val locationStateFlow =
+        object LackPermission : LocationResult()
-        LocationFlow(context)
+
-            .get(MIN_TIME, MIN_DISTANCE)
+        object Loading : LocationResult()
-            .onEach {
+    }
-                latestLocation = it
+
+    private var hasLocationPermission = MutableStateFlow<Boolean>(false)
+    private var latestLocation: LocationResult = LocationResult.Loading
+
+    fun setLocationPermission(newValue: Boolean) {
+        if (newValue != hasLocationPermission.value) {
+            hasLocationPermission.tryEmit(newValue)
+        }
+    }
+
+    @OptIn(ExperimentalCoroutinesApi::class)
+    val geohashStateFlow =
+        hasLocationPermission
+            .transformLatest {
+                emitAll(
+                    LocationFlow
+                        (context)
+                        .get(MIN_TIME, MIN_DISTANCE)
+                        .map {
+                            LocationResult.Success(it.toGeoHash(com.vitorpamplona.amethyst.ui.actions.GeohashPrecision.KM_5_X_5.digits)) as LocationResult
+                        }.onEach {
+                            latestLocation = it
+                        }.catch { e ->
+                            e.printStackTrace()
+                            latestLocation = LocationResult.LackPermission
+                            emit(LocationResult.LackPermission)
+                        },
+                )
             }.stateIn(
                 scope,
                 SharingStarted.WhileSubscribed(5000),
                 latestLocation,
             )
-
-    val geohashStateFlow =
-        locationStateFlow
-            .map { it.toGeoHash(com.vitorpamplona.amethyst.ui.actions.GeohashPrecision.KM_5_X_5.digits).toString() }
-            .stateIn(
-                scope,
-                SharingStarted.WhileSubscribed(5000),
-                "",
-            )
 }
 
 object CachedGeoLocations {
@@ -144,8 +172,11 @@ private class ReverseGeoLocationUtil {
     ): String? {
         return try {
             Geocoder(context)
-                .getFromLocation(location.latitude, location.longitude, 1)
+                .getFromLocation(
-                ?.firstOrNull()
+                    location.latitude,
+                    location.longitude,
+                    1,
+                )?.firstOrNull()
                 ?.let { address ->
                     listOfNotNull(address.locality ?: address.subAdminArea, address.countryCode)
                         .joinToString(", ")
@@ -157,3 +188,52 @@ private class ReverseGeoLocationUtil {
         }
     }
 }
+
+class ReverseGeoLocationFlow(
+    private val context: Context,
+) {
+    @SuppressLint("MissingPermission")
+    fun get(location: Location): Flow<String?> =
+        callbackFlow {
+            val locationManager = Geocoder(context)
+
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+                val locationCallback =
+                    (
+                        Geocoder.GeocodeListener { addresses ->
+                            launch {
+                                send(
+                                    addresses.firstOrNull()?.let {
+                                        listOfNotNull(it.locality ?: it.subAdminArea, it.countryCode).joinToString(", ")
+                                    },
+                                )
+                            }
+                        }
+                    )
+                Log.d("GeoLocation Service", "LocationState Start")
+
+                locationManager
+                    .getFromLocation(
+                        location.latitude,
+                        location.longitude,
+                        1,
+                        locationCallback,
+                    )
+            } else {
+                launch {
+                    send(
+                        Geocoder(context)
+                            .getFromLocation(
+                                location.latitude,
+                                location.longitude,
+                                1,
+                            )?.firstOrNull()
+                            ?.let { address ->
+                                listOfNotNull(address.locality ?: address.subAdminArea, address.countryCode)
+                                    .joinToString(", ")
+                            },
+                    )
+                }
+            }
+        }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/actions/NewPostViewModel.kt

@@ -34,7 +34,6 @@ import androidx.compose.ui.text.TextRange
 import androidx.compose.ui.text.input.TextFieldValue
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
-import com.fonfon.kgeohash.toGeoHash
 import com.vitorpamplona.amethyst.Amethyst
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.commons.compose.insertUrlAtCursor
@@ -44,6 +43,7 @@ import com.vitorpamplona.amethyst.model.LocalCache
 import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.model.User
 import com.vitorpamplona.amethyst.service.FileHeader
+import com.vitorpamplona.amethyst.service.LocationState
 import com.vitorpamplona.amethyst.service.Nip96Uploader
 import com.vitorpamplona.amethyst.service.NostrSearchEventOrUserDataSource
 import com.vitorpamplona.amethyst.ui.components.MediaCompressor
@@ -75,13 +75,8 @@ import com.vitorpamplona.quartz.events.ZapSplitSetup
 import com.vitorpamplona.quartz.events.findURLs
 import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.channels.Channel
-import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.StateFlow
-import kotlinx.coroutines.flow.mapLatest
-import kotlinx.coroutines.flow.stateIn
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import java.util.UUID
@@ -166,7 +161,7 @@ open class NewPostViewModel : ViewModel() {
 
     // GeoHash
     var wantsToAddGeoHash by mutableStateOf(false)
-    var location: StateFlow<String?>? = null
+    var location: StateFlow<LocationState.LocationResult>? = null
 
     // ZapRaiser
     var canAddZapRaiser by mutableStateOf(false)
@@ -535,7 +530,7 @@ open class NewPostViewModel : ViewModel() {
                 null
             }
 
-        val geoHash = location?.value
+        val geoHash = (location?.value as? LocationState.LocationResult.Success)?.geoHash?.toString()
         val localZapRaiserAmount = if (wantsZapraiser) zapRaiserAmount else null
 
         nip95attachments.forEach {
@@ -1259,13 +1254,9 @@ open class NewPostViewModel : ViewModel() {
         contentToAddUrl = uri
     }
 
-    @OptIn(ExperimentalCoroutinesApi::class)
+    fun locationFlow(): StateFlow<LocationState.LocationResult> {
-    fun locationFlow(): Flow<String?> {
         if (location == null) {
-            location =
+            location = Amethyst.instance.locationManager.geohashStateFlow
-                Amethyst.instance.locationManager.locationStateFlow
-                    .mapLatest { it.toGeoHash(GeohashPrecision.KM_5_X_5.digits).toString() }
-                    .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5000), null)
         }
 
         return location!!

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/dal/FilterByListParams.kt

@@ -20,6 +20,7 @@
  */
 package com.vitorpamplona.amethyst.ui.dal
 
+import com.vitorpamplona.amethyst.model.AROUND_ME
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.GLOBAL_FOLLOWS
 import com.vitorpamplona.quartz.encoders.ATag
@@ -33,6 +34,7 @@ import com.vitorpamplona.quartz.utils.TimeUtils
 class FilterByListParams(
     val isGlobal: Boolean,
     val isHiddenList: Boolean,
+    val isAroundMe: Boolean,
     val followLists: Account.LiveFollowList?,
     val hiddenLists: Account.LiveHiddenUsers,
     val now: Long = TimeUtils.oneMinuteFromNow(),
@@ -43,6 +45,7 @@ class FilterByListParams(
 
     fun isEventInList(noteEvent: Event): Boolean {
         if (followLists == null) return false
+        if (isAroundMe && followLists.geotags.isEmpty() == true) return false
 
         return if (noteEvent is LiveActivitiesEvent) {
             noteEvent.participantsIntersect(followLists.authors) ||
@@ -95,6 +98,7 @@ class FilterByListParams(
             FilterByListParams(
                 isGlobal = selectedListName == GLOBAL_FOLLOWS,
                 isHiddenList = showHiddenKey(selectedListName, userHex),
+                isAroundMe = selectedListName == AROUND_ME,
                 followLists = followLists,
                 hiddenLists = hiddenUsers,
             )

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/navigation/FeedFilterSpinner.kt

@@ -54,6 +54,7 @@ import com.google.accompanist.permissions.rememberPermissionState
 import com.vitorpamplona.amethyst.Amethyst
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.model.AddressableNote
+import com.vitorpamplona.amethyst.service.LocationState
 import com.vitorpamplona.amethyst.ui.actions.LoadingAnimation
 import com.vitorpamplona.amethyst.ui.note.LoadCityName
 import com.vitorpamplona.amethyst.ui.screen.AroundMeFeedDefinition
@@ -71,7 +72,6 @@ import com.vitorpamplona.amethyst.ui.theme.StdHorzSpacer
 import com.vitorpamplona.amethyst.ui.theme.placeholderText
 import com.vitorpamplona.quartz.events.PeopleListEvent
 import kotlinx.collections.immutable.ImmutableList
-import kotlinx.coroutines.flow.map
 
 @OptIn(ExperimentalPermissionsApi::class)
 @Composable
@@ -104,6 +104,12 @@ fun FeedFilterSpinner(
             }
         }
 
+    val locationPermissionState = rememberPermissionState(Manifest.permission.ACCESS_COARSE_LOCATION)
+
+    LaunchedEffect(locationPermissionState.status.isGranted) {
+        Amethyst.instance.locationManager.setLocationPermission(locationPermissionState.status.isGranted)
+    }
+
     Box(
         modifier = modifier,
         contentAlignment = Alignment.Center,
@@ -115,27 +121,45 @@ fun FeedFilterSpinner(
                 Text(currentText)
 
                 if (selected is AroundMeFeedDefinition) {
-                    val locationPermissionState =
-                        rememberPermissionState(
-                            Manifest.permission.ACCESS_COARSE_LOCATION,
-                        )
-
                     if (!locationPermissionState.status.isGranted) {
                         LaunchedEffect(locationPermissionState) { locationPermissionState.launchPermissionRequest() }
+
+                        Text(
+                            text = stringRes(R.string.lack_location_permissions),
+                            fontSize = 12.sp,
+                            lineHeight = 12.sp,
+                        )
                     } else {
                         val location by Amethyst.instance.locationManager.geohashStateFlow
-                            .collectAsStateWithLifecycle(null)
+                            .collectAsStateWithLifecycle()
 
-                        location?.let {
+                        when (val myLocation = location) {
-                            LoadCityName(
+                            is LocationState.LocationResult.Success -> {
-                                geohashStr = it,
+                                LoadCityName(
-                                onLoading = {
+                                    geohashStr = myLocation.geoHash.toString(),
-                                    Spacer(modifier = StdHorzSpacer)
+                                    onLoading = {
-                                    LoadingAnimation()
+                                        Spacer(modifier = StdHorzSpacer)
-                                },
+                                        LoadingAnimation()
-                            ) { cityName ->
+                                    },
+                                ) { cityName ->
+                                    Text(
+                                        text = "($cityName)",
+                                        fontSize = 12.sp,
+                                        lineHeight = 12.sp,
+                                    )
+                                }
+                            }
+
+                            LocationState.LocationResult.LackPermission -> {
                                 Text(
-                                    text = "($cityName)",
+                                    text = stringRes(R.string.lack_location_permissions),
+                                    fontSize = 12.sp,
+                                    lineHeight = 12.sp,
+                                )
+                            }
+                            LocationState.LocationResult.Loading -> {
+                                Text(
+                                    text = stringRes(R.string.loading_location),
                                     fontSize = 12.sp,
                                     lineHeight = 12.sp,
                                 )

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/Loaders.kt

@@ -215,6 +215,7 @@ fun LoadCityName(
                         CachedGeoLocations
                             .geoLocate(geohashStr, geoHash.toLocation(), context)
                             ?.ifBlank { null }
+
                     if (newCityName != null && newCityName != cityName) {
                         cityName = newCityName
                     }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/FollowListState.kt

@@ -105,7 +105,7 @@ class FollowListState(
             unpackList = listOf(MuteListEvent.blockListFor(account.userProfile().pubkeyHex)),
         )
 
-    val defaultLists = persistentListOf(kind3Follow, globalFollow, aroundMe, muteListFollow)
+    val defaultLists = persistentListOf(kind3Follow, aroundMe, globalFollow, muteListFollow)
 
     fun getPeopleLists(): List<FeedDefinition> =
         account

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/NewPostScreen.kt

@@ -128,10 +128,12 @@ import coil3.compose.AsyncImage
 import com.google.accompanist.permissions.ExperimentalPermissionsApi
 import com.google.accompanist.permissions.isGranted
 import com.google.accompanist.permissions.rememberPermissionState
+import com.vitorpamplona.amethyst.Amethyst
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.commons.richtext.RichTextParser
 import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.model.User
+import com.vitorpamplona.amethyst.service.LocationState
 import com.vitorpamplona.amethyst.service.Nip96MediaServers
 import com.vitorpamplona.amethyst.service.NostrSearchEventOrUserDataSource
 import com.vitorpamplona.amethyst.ui.actions.LoadingAnimation
@@ -1285,6 +1287,10 @@ fun LocationAsHash(postViewModel: NewPostViewModel) {
             Manifest.permission.ACCESS_COARSE_LOCATION,
         )
 
+    LaunchedEffect(locationPermissionState.status.isGranted) {
+        Amethyst.instance.locationManager.setLocationPermission(locationPermissionState.status.isGranted)
+    }
+
     if (locationPermissionState.status.isGranted) {
         Column(
             modifier = Modifier.fillMaxWidth(),
@@ -1334,9 +1340,28 @@ fun LocationAsHash(postViewModel: NewPostViewModel) {
 
 @Composable
 fun DisplayLocationObserver(postViewModel: NewPostViewModel) {
-    val location by postViewModel.locationFlow().collectAsStateWithLifecycle(null)
+    val location by postViewModel.locationFlow().collectAsStateWithLifecycle()
 
-    location?.let { DisplayLocationInTitle(geohash = it) }
+    when (val myLocation = location) {
+        is LocationState.LocationResult.Success -> {
+            DisplayLocationInTitle(geohash = myLocation.geoHash.toString())
+        }
+
+        LocationState.LocationResult.LackPermission -> {
+            Text(
+                text = stringRes(R.string.lack_location_permissions),
+                fontSize = 12.sp,
+                lineHeight = 12.sp,
+            )
+        }
+        LocationState.LocationResult.Loading -> {
+            Text(
+                text = stringRes(R.string.loading_location),
+                fontSize = 12.sp,
+                lineHeight = 12.sp,
+            )
+        }
+    }
 }
 
 @Composable

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

@@ -645,6 +645,9 @@
     <string name="geohash_title">Expose Location as </string>
     <string name="geohash_explainer">Adds a Geohash of your location to the post. The public will know you are within 5km (3mi) of the current location</string>
 
+    <string name="loading_location">Loading location</string>
+    <string name="lack_location_permissions">No Location Permissions</string>
+
     <string name="add_sensitive_content_explainer">Adds sensitive content warning before showing your content. This is ideal for any NSFW content or content some people may find offensive or disturbing</string>
 
     <string name="new_feature_nip17_might_not_be_available_title">New Feature</string>

quartz/src/main/java/com/vitorpamplona/quartz/events/Event.kt

@@ -280,7 +280,13 @@ open class Event(
         return PoWRank.getCommited(id, commitedPoW)
     }
 
-    override fun getGeoHash(): String? = tags.firstOrNull { it.size > 1 && it[0] == "g" }?.get(1)?.ifBlank { null }
+    override fun getGeoHash(): String? =
+        tags
+            .filter { it.size > 1 && it[0] == "g" }
+            .maxByOrNull {
+                it[1].length
+            }?.get(1)
+            ?.ifBlank { null }
 
     override fun getReward(): BigDecimal? =
         try {