added delete button to uploaded presets

Author: oliver-lebaigue-bright-bench

app/src/main/java/com/better/nothing/music/vizualizer/logic/CommunityRepository.kt

@@ -53,6 +53,17 @@ class CommunityRepository {
             throw e
         }
     }
+
+    suspend fun deletePreset(presetId: String) {
+        try {
+            Log.d("CommunityRepo", "Deleting preset: $presetId")
+            database.child(presetId).removeValue().await()
+            Log.d("CommunityRepo", "Delete successful")
+        } catch (e: Exception) {
+            Log.e("CommunityRepo", "Delete failed", e)
+            throw e
+        }
+    }
 
     suspend fun incrementDownloadCount(presetId: String) {
         val ref = database.child(presetId).child("downloads")

app/src/main/java/com/better/nothing/music/vizualizer/model/CommunityPreset.kt

@@ -8,6 +8,7 @@ data class CommunityPreset(
     val id: String = "",
     val name: String = "",
     val author: String = "Anonymous",
+    val authorId: String = "",
     val phoneModel: String = "",
     val zones: List<ZoneData> = emptyList(),
     val timestamp: Long = System.currentTimeMillis(),

app/src/main/java/com/better/nothing/music/vizualizer/ui/CommunityPresetsScreen.kt

@@ -9,6 +9,7 @@ import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.Delete
 import androidx.compose.material.icons.filled.Download
 import androidx.compose.material3.*
 import androidx.compose.runtime.*
@@ -24,8 +25,10 @@ import java.util.*
 @Composable
 fun CommunityPresetsScreen(
     presets: List<CommunityPreset>?,
+    currentUserId: String?,
     error: String?,
     onDownload: (CommunityPreset) -> Unit,
+    onDelete: (CommunityPreset) -> Unit,
     onDismiss: () -> Unit
 ) {
     Scaffold(
@@ -68,7 +71,12 @@ fun CommunityPresetsScreen(
                     verticalArrangement = Arrangement.spacedBy(12.dp)
                 ) {
                     items(presets) { preset ->
-                        PresetCard(preset, onDownload)
+                        PresetCard(
+                            preset = preset, 
+                            onDownload = onDownload,
+                            onDelete = onDelete,
+                            isOwner = currentUserId != null && preset.authorId == currentUserId
+                        )
                     }
                 }
             }
@@ -77,7 +85,12 @@ fun CommunityPresetsScreen(
 }
 
 @Composable
-fun PresetCard(preset: CommunityPreset, onDownload: (CommunityPreset) -> Unit) {
+fun PresetCard(
+    preset: CommunityPreset, 
+    onDownload: (CommunityPreset) -> Unit,
+    onDelete: (CommunityPreset) -> Unit,
+    isOwner: Boolean
+) {
     Card(
         shape = RoundedCornerShape(24.dp),
         colors = CardDefaults.cardColors(containerColor = Color(0xFF1A1A1A)),
@@ -97,6 +110,38 @@ fun PresetCard(preset: CommunityPreset, onDownload: (CommunityPreset) -> Unit) {
                 Text(stringResource(R.string.downloads_count, date, preset.downloads), fontSize = 12.sp, color = Color.DarkGray)
             }
 
+            if (isOwner) {
+                var showConfirm by remember { mutableStateOf(false) }
+                
+                if (showConfirm) {
+                    AlertDialog(
+                        onDismissRequest = { showConfirm = false },
+                        title = { Text("Delete Preset?") },
+                        text = { Text("Are you sure you want to delete this preset from the community?") },
+                        confirmButton = {
+                            TextButton(onClick = { 
+                                onDelete(preset)
+                                showConfirm = false
+                            }) {
+                                Text("Delete", color = Color.Red)
+                            }
+                        },
+                        dismissButton = {
+                            TextButton(onClick = { showConfirm = false }) {
+                                Text("Cancel")
+                            }
+                        }
+                    )
+                }
+
+                IconButton(
+                    onClick = { showConfirm = true },
+                    modifier = Modifier.padding(end = 8.dp)
+                ) {
+                    Icon(Icons.Default.Delete, contentDescription = "Delete", tint = Color.Gray)
+                }
+            }
+
             IconButton(
                 onClick = { onDownload(preset) },
                 colors = IconButtonDefaults.iconButtonColors(

app/src/main/java/com/better/nothing/music/vizualizer/ui/MainActivity.kt

@@ -178,6 +178,9 @@ internal class MainViewModel(application: Application) : AndroidViewModel(applic
     private val _userNickname = MutableStateFlow("Anonymous")
     val userNickname = _userNickname.asStateFlow()
 
+    private val _userId = MutableStateFlow<String?>(null)
+    val userId = _userId.asStateFlow()
+
     private var lastStatsSyncMs = 0L
 
     private val _isShowingLeaderboard = MutableStateFlow(false)
@@ -310,22 +313,23 @@ internal class MainViewModel(application: Application) : AndroidViewModel(applic
         _totalFlashlightTime.value = prefs.getLong("total_flashlight_time", 0L)
         _userNickname.value = prefs.getString("user_nickname", "Anonymous") ?: "Anonymous"
 
-        var userId = prefs.getString("user_id", null)
-        if (userId == null) {
-            userId = java.util.UUID.randomUUID().toString()
-            prefs.edit().putString("user_id", userId).apply()
+        var uId = prefs.getString("user_id", null)
+        if (uId == null) {
+            uId = java.util.UUID.randomUUID().toString()
+            prefs.edit().putString("user_id", uId).apply()
         }
+        _userId.value = uId
 
         viewModelScope.launch {
             try {
-                val profile = userRepository.getUserProfile(userId)
+                val profile = userRepository.getUserProfile(uId)
                 if (profile != null) {
                     _userProfile.value = profile
                     _userNickname.value = profile.displayName
                 } else {
                     // Create initial profile
                     val newProfile = UserProfile(
-                        userId = userId,
+                        userId = uId,
                         displayName = _userNickname.value,
                         totalVisualizedTime = _totalVisualizedTime.value
                     )
@@ -1217,6 +1221,7 @@ internal class MainViewModel(application: Application) : AndroidViewModel(applic
                 val preset = CommunityPreset(
                     name = name,
                     author = author,
+                    authorId = _userId.value ?: "",
                     phoneModel = phoneModelForDevice(selectedDevice.value),
                     zones = zones.map { ZoneData.fromZoneSpec(it) }
                 )
@@ -1234,6 +1239,22 @@ internal class MainViewModel(application: Application) : AndroidViewModel(applic
         }
     }
 
+    fun deleteCommunityPreset(preset: CommunityPreset) {
+        viewModelScope.launch {
+            try {
+                communityRepository.deletePreset(preset.id)
+                withContext(Dispatchers.Main) {
+                    Toast.makeText(ctx, "Preset deleted", Toast.LENGTH_SHORT).show()
+                }
+            } catch (e: Exception) {
+                Log.e("MainViewModel", "Failed to delete preset", e)
+                withContext(Dispatchers.Main) {
+                    Toast.makeText(ctx, "Failed to delete: ${e.message}", Toast.LENGTH_SHORT).show()
+                }
+            }
+        }
+    }
+
     fun downloadPreset(preset: CommunityPreset) {
         saveCustomPreset(preset.name, preset.zones.map { it.toZoneSpec() }, preset.author)
         analytics.logCommunityPresetDownloaded(preset.name, preset.author)
@@ -2390,6 +2411,7 @@ class MainActivity : ComponentActivity() {
                 val leaderboardEntries by viewModel.leaderboardEntries.collectAsStateWithLifecycle()
                 val communityPresets by viewModel.communityPresets.collectAsStateWithLifecycle()
                 val communityError by viewModel.communityError.collectAsStateWithLifecycle()
+                val userId by viewModel.userId.collectAsStateWithLifecycle()
                 val thanksMessage by viewModel.thanksMessage.collectAsStateWithLifecycle()
                 val latestAnnouncement by viewModel.latestAnnouncement.collectAsStateWithLifecycle()
                 val showAnnouncementModal by viewModel.showAnnouncementModal.collectAsStateWithLifecycle()
@@ -2518,8 +2540,10 @@ class MainActivity : ComponentActivity() {
                     ) {
                         CommunityPresetsScreen(
                             presets = communityPresets,
+                            currentUserId = userId,
                             error = communityError,
                             onDownload = viewModel::downloadPreset,
+                            onDelete = viewModel::deleteCommunityPreset,
                             onDismiss = viewModel::hideCommunity
                         )
                     }