Expands the Around me filter to 50km

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

@@ -28,6 +28,7 @@ import androidx.lifecycle.asLiveData
 import androidx.lifecycle.liveData
 import androidx.lifecycle.switchMap
 import com.fasterxml.jackson.module.kotlin.readValue
+import com.fonfon.kgeohash.GeoHash
 import com.vitorpamplona.amethyst.Amethyst
 import com.vitorpamplona.amethyst.BuildConfig
 import com.vitorpamplona.amethyst.commons.richtext.RichTextParser
@@ -579,6 +580,46 @@ class Account(
             }
         }
 
+    fun compute50kmLine(geoHash: GeoHash): List<String> {
+        val hashes = mutableListOf<String>()
+
+        hashes.add(geoHash.toString())
+
+        var currentGeoHash = geoHash
+        repeat(5) {
+            currentGeoHash = currentGeoHash.westernNeighbour
+            hashes.add(currentGeoHash.toString())
+        }
+
+        currentGeoHash = geoHash
+        repeat(5) {
+            currentGeoHash = currentGeoHash.easternNeighbour
+            hashes.add(currentGeoHash.toString())
+        }
+
+        return hashes
+    }
+
+    fun compute50kmRange(geoHash: GeoHash): List<String> {
+        val hashes = mutableListOf<String>()
+
+        hashes.addAll(compute50kmLine(geoHash))
+
+        var currentGeoHash = geoHash
+        repeat(5) {
+            currentGeoHash = currentGeoHash.northernNeighbour
+            hashes.addAll(compute50kmLine(currentGeoHash))
+        }
+
+        currentGeoHash = geoHash
+        repeat(5) {
+            currentGeoHash = currentGeoHash.southernNeighbour
+            hashes.addAll(compute50kmLine(currentGeoHash))
+        }
+
+        return hashes
+    }
+
     suspend fun mapIntoFollowLists(
         listName: String,
         kind3: LiveFollowList?,
@@ -593,16 +634,9 @@ class Account(
             val geohashResult = location ?: Amethyst.instance.locationManager.geohashStateFlow.value
             if (geohashResult is LocationState.LocationResult.Success) {
                 // 2 neighbors deep = 25x25km
-                val hashes =
-                    listOf(geohashResult.geoHash.toString()) +
-                        geohashResult.geoHash.adjacent
-                            .map { listOf(it.toString()) + it.adjacent.map { it.toString() } }
-                            .flatten()
-                            .distinct()
-
                 LiveFollowList(
                     authorsPlusMe = setOf(signer.pubKey),
-                    geotags = hashes.toSet(),
+                    geotags = compute50kmRange(geohashResult.geoHash).toSet(),
                 )
             } else {
                 LiveFollowList(authorsPlusMe = setOf(signer.pubKey))

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

@@ -124,10 +124,7 @@ object NostrDiscoveryDataSource : AmethystNostrDataSource("DiscoveryFeed") {
                             kinds = listOf(ClassifiedsEvent.KIND),
                             tags =
                                 mapOf(
-                                    "g" to
+                                    "g" to it,
-                                        it
-                                            .map { listOf(it, it.lowercase(), it.uppercase(), it.capitalize()) }
-                                            .flatten(),
                                 ),
                             limit = 300,
                             since =
@@ -304,13 +301,7 @@ object NostrDiscoveryDataSource : AmethystNostrDataSource("DiscoveryFeed") {
             filter =
                 SincePerRelayFilter(
                     kinds = listOf(LiveActivitiesChatMessageEvent.KIND, LiveActivitiesEvent.KIND),
-                    tags =
+                    tags = mapOf("g" to hashToLoad),
-                        mapOf(
-                            "g" to
-                                hashToLoad
-                                    .map { listOf(it, it.lowercase(), it.uppercase(), it.capitalize()) }
-                                    .flatten(),
-                        ),
                     limit = 300,
                     since =
                         latestEOSEs.users[account.userProfile()]
@@ -367,12 +358,7 @@ object NostrDiscoveryDataSource : AmethystNostrDataSource("DiscoveryFeed") {
                     kinds =
                         listOf(ChannelCreateEvent.KIND, ChannelMetadataEvent.KIND, ChannelMessageEvent.KIND),
                     tags =
-                        mapOf(
+                        mapOf("g" to hashToLoad),
-                            "g" to
-                                hashToLoad
-                                    .map { listOf(it, it.lowercase(), it.uppercase(), it.capitalize()) }
-                                    .flatten(),
-                        ),
                     limit = 300,
                     since =
                         latestEOSEs.users[account.userProfile()]
@@ -426,13 +412,7 @@ object NostrDiscoveryDataSource : AmethystNostrDataSource("DiscoveryFeed") {
             filter =
                 SincePerRelayFilter(
                     kinds = listOf(CommunityDefinitionEvent.KIND, CommunityPostApprovalEvent.KIND),
-                    tags =
+                    tags = mapOf("g" to hashToLoad),
-                        mapOf(
-                            "g" to
-                                hashToLoad
-                                    .map { listOf(it, it.lowercase(), it.uppercase(), it.capitalize()) }
-                                    .flatten(),
-                        ),
                     limit = 300,
                     since =
                         latestEOSEs.users[account.userProfile()]

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

@@ -229,10 +229,7 @@ object NostrHomeDataSource : AmethystNostrDataSource("HomeFeed") {
                         ),
                     tags =
                         mapOf(
-                            "g" to
+                            "g" to hashToLoad.toList(),
-                                hashToLoad
-                                    .map { listOf(it.lowercase()) }
-                                    .flatten(),
                         ),
                     limit = 100,
                     since =

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

@@ -160,10 +160,7 @@ object NostrVideoDataSource : AmethystNostrDataSource("VideoFeed") {
 
         if (hashToLoad.isEmpty()) return emptyList()
 
-        val geoHashes =
+        val geoHashes = hashToLoad
-            hashToLoad
-                .map { listOf(it, it.lowercase(), it.uppercase(), it.capitalize()) }
-                .flatten()
 
         return listOf(
             TypedFilter(

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

@@ -46,7 +46,7 @@ class FilterByListParams(
 
     fun isEventInList(noteEvent: Event): Boolean {
         if (followLists == null) return false
-        if (isAroundMe && followLists.geotags.isEmpty() == true) return false
+        if (isAroundMe && followLists.geotags.isEmpty()) return false
 
         return if (noteEvent is LiveActivitiesEvent) {
             noteEvent.participantsIntersect(followLists.authors) ||