refactor: unified `getUser` repository call for convention

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

@@ -2,6 +2,8 @@ package com.geeksville.mesh.model
 
 import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.coroutineScope
+import com.geeksville.mesh.DataPacket
+import com.geeksville.mesh.MeshProtos
 import com.geeksville.mesh.database.dao.NodeInfoDao
 import com.geeksville.mesh.database.entity.MyNodeEntity
 import com.geeksville.mesh.database.entity.NodeEntity
@@ -35,9 +37,15 @@ class NodeDB @Inject constructor(
     private val _nodeDBbyNum = MutableStateFlow<Map<Int, NodeEntity>>(mapOf())
     val nodeDBbyNum: StateFlow<Map<Int, NodeEntity>> get() = _nodeDBbyNum
 
-    fun getUser(userId: String?) = userId?.let { id ->
-        nodeDBbyNum.value.values.find { it.user.id == id }?.user
-    }
+    fun getUser(nodeNum: Int): MeshProtos.User = getUser(DataPacket.nodeNumToDefaultId(nodeNum))
+
+    fun getUser(userId: String): MeshProtos.User =
+        nodeDBbyNum.value.values.find { it.user.id == userId }?.user
+            ?: MeshProtos.User.newBuilder()
+                .setLongName("Meshtastic ${userId.takeLast(n = 4)}")
+                .setShortName(userId.takeLast(n = 4))
+                .setHwModel(MeshProtos.HardwareModel.UNSET)
+                .build()
 
     init {
         nodeInfoDao.getMyNodeInfo().onEach { _myNodeInfo.value = it }

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

@@ -251,12 +251,7 @@ class UIViewModel @Inject constructor(
     fun updateMapCenterAndZoom(center: GeoPoint, zoom: Double) =
         _mapState.update { it.copy(center = center, zoom = zoom) }
 
-    fun getUser(userId: String?) = nodeDB.getUser(userId) ?: user {
-        id = userId.orEmpty()
-        longName = app.getString(R.string.unknown_username)
-        shortName = app.getString(R.string.unknown_node_short_name)
-        hwModel = MeshProtos.HardwareModel.UNSET
-    }
+    fun getUser(userId: String?) = nodeDB.getUser(userId ?: DataPacket.ID_BROADCAST)
 
     private val _snackbarText = MutableLiveData<Any?>(null)
     val snackbarText: LiveData<Any?> get() = _snackbarText

app/src/main/java/com/geeksville/mesh/repository/datastore/RadioConfigRepository.kt

@@ -56,6 +56,8 @@ class RadioConfigRepository @Inject constructor(
      */
     val nodeDBbyNum: StateFlow<Map<Int, NodeEntity>> get() = nodeDB.nodeDBbyNum
 
+    fun getUser(nodeNum: Int) = nodeDB.getUser(nodeNum)
+
     suspend fun upsert(node: NodeEntity) = nodeDB.upsert(node)
     suspend fun installNodeDB(mi: MyNodeEntity, nodes: List<NodeEntity>) {
         nodeDB.installNodeDB(mi, nodes)

app/src/main/java/com/geeksville/mesh/service/MeshService.kt

@@ -440,12 +440,8 @@ class MeshService : Service(), Logging {
         }
     }
 
-    private fun getUserName(num: Int): String {
-        val user = nodeDBbyNodeNum[num]?.user
-        val longName = user?.longName ?: getString(R.string.unknown_username)
-        val shortName = user?.shortName ?: DataPacket.nodeNumToDefaultId(num)
-        return "$longName ($shortName)"
-    }
+    private fun getUserName(num: Int): String =
+        with(radioConfigRepository.getUser(num)) { "$longName ($shortName)" }
 
     private val numNodes get() = nodeDBbyNodeNum.size