refactor: move DebugFragment to separate ViewModel

app/src/main/java/com/geeksville/mesh/model/DebugViewModel.kt

@@ -0,0 +1,39 @@
+package com.geeksville.mesh.model
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.geeksville.mesh.android.Logging
+import com.geeksville.mesh.database.MeshLogRepository
+import com.geeksville.mesh.database.entity.MeshLog
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+@HiltViewModel
+class DebugViewModel @Inject constructor(
+    private val meshLogRepository: MeshLogRepository,
+) : ViewModel(), Logging {
+
+    private val _meshLog = MutableStateFlow<List<MeshLog>>(emptyList())
+    val meshLog: StateFlow<List<MeshLog>> = _meshLog
+
+    init {
+        viewModelScope.launch {
+            meshLogRepository.getAllLogs().collect { _meshLog.value = it }
+        }
+
+        debug("DebugViewModel created")
+    }
+
+    override fun onCleared() {
+        super.onCleared()
+        debug("DebugViewModel cleared")
+    }
+
+    fun deleteAllLogs() = viewModelScope.launch(Dispatchers.IO) {
+        meshLogRepository.deleteAll()
+    }
+}