WR-404: Refresh local printers

Author: dev-Fabi

src/main/kotlin/org/datepollsystems/waiterrobot/mediator/ui/configurePrinters/ConfigurePrintersScreen.kt

@@ -7,6 +7,7 @@ import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.ArrowForward
 import androidx.compose.material.icons.filled.Delete
 import androidx.compose.material.icons.filled.Logout
+import androidx.compose.material.icons.filled.Refresh
 import androidx.compose.material3.*
 import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
@@ -60,11 +61,15 @@ fun ConfigurePrintersScreen(vm: ConfigurePrintersViewModel) {
                     Spacer(modifier = Modifier.weight(1f))
                 }
 
+                IconButton(onClick = { vm.refreshLocalPrinters() }) {
+                    Icon(Icons.Filled.Refresh, contentDescription = null)
+                }
+
                 IconButton(onClick = { App.logout() }) {
                     Icon(Icons.Filled.Logout, contentDescription = null)
                 }
             }
-            Divider(modifier = Modifier.fillMaxWidth())
+            HorizontalDivider(modifier = Modifier.fillMaxWidth())
 
             if (state.unPairedBackendPrinters != null) {
                 // TODO small infotext for user
@@ -85,7 +90,7 @@ fun ConfigurePrintersScreen(vm: ConfigurePrintersViewModel) {
                     }
                 }
 
-                Divider(modifier = Modifier.fillMaxWidth())
+                HorizontalDivider(modifier = Modifier.fillMaxWidth())
 
                 Column(
                     modifier = Modifier.fillMaxHeight(),

src/main/kotlin/org/datepollsystems/waiterrobot/mediator/ui/configurePrinters/ConfigurePrintersViewModel.kt

@@ -183,6 +183,28 @@ class ConfigurePrintersViewModel(
         }
     }
 
+    fun refreshLocalPrinters() = inVmScope {
+        PrinterDiscoverService.refreshPrinters()
+        reduce {
+            val localPrinters = PrinterDiscoverService.localPrinterMap.toList().dropLast(1).toMap()
+            val unpairedBackendPrinters = unPairedBackendPrinters?.toMutableList() ?: mutableListOf()
+            val newPairings = pairings.mapNotNull { pairing ->
+                val loPrinter = localPrinters[pairing.loPrinter.localId]
+                if (loPrinter != null) {
+                    ConfigurePrintersState.PrinterPairing(pairing.bePrinter, loPrinter)
+                } else {
+                    unpairedBackendPrinters.add(pairing.bePrinter)
+                    null // Remove pairing if local printer is not present anymore
+                }
+            }
+            copy(
+                localPrinters = localPrinters.values.toList(),
+                pairings = newPairings,
+                unPairedBackendPrinters = unpairedBackendPrinters
+            )
+        }
+    }
+
     override fun onKeyEvent(event: KeyEvent): Boolean {
         return when {
             (event.isCtrlPressed || event.isMetaPressed) && event.key == Key.D -> {