Add factory reset button

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

@@ -349,6 +349,17 @@ class UIViewModel @Inject constructor(
         meshService?.requestReboot(DataPacket.ID_LOCAL)
     }
 
+    fun requestFactoryReset() {
+        val config = _localConfig.value
+        if (config != null) {
+            val builder = config.device.toBuilder()
+            builder.factoryReset = true
+            val newConfig = ConfigProtos.Config.newBuilder()
+            newConfig.device = builder.build()
+            setDeviceConfig(newConfig.build())
+        }
+    }
+
     /**
      * Write the persisted packet data out to a CSV file in the specified location.
      */

app/src/main/java/com/geeksville/mesh/ui/AdvancedSettingsFragment.kt

@@ -55,6 +55,7 @@ class AdvancedSettingsFragment : ScreenFragment("Advanced Settings"), Logging {
             binding.lsSleepSwitch.isEnabled = connected && model.isESP32()
             binding.shutdownButton.isEnabled = connected && model.hasAXP()
             binding.rebootButton.isEnabled = connected
+            binding.factoryResetButton.isEnabled = connected
         }
 
         binding.positionBroadcastPeriodEditText.on(EditorInfo.IME_ACTION_DONE) {
@@ -130,5 +131,17 @@ class AdvancedSettingsFragment : ScreenFragment("Advanced Settings"), Logging {
                 }
                 .show()
         }
+
+        binding.factoryResetButton.setOnClickListener {
+            MaterialAlertDialogBuilder(requireContext())
+                .setTitle(R.string.are_you_sure_factory_reset)
+                .setMessage(R.string.factory_reset_description)
+                .setNeutralButton(R.string.cancel) { _, _ ->
+                }
+                .setPositiveButton(R.string.okay) { _, _ ->
+                    model.requestFactoryReset()
+                }
+                .show()
+        }
     }
 }

app/src/main/res/layout/advanced_settings.xml

@@ -88,4 +88,16 @@
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toEndOf="@id/shutdownButton"
         app:layout_constraintTop_toTopOf="@id/shutdownButton" />
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/factoryResetButton"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="16dp"
+        android:layout_marginEnd="16dp"
+        android:text="@string/factory_reset"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/shutdownButton" />
+
 </androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/values/strings.xml

@@ -155,4 +155,7 @@
     <string name="message">Message</string>
     <string name="mode_append">Append to message</string>
     <string name="mode_instant">Instantly send</string>
+    <string name="factory_reset">Factory reset</string>
+    <string name="are_you_sure_factory_reset">Are you sure you want to factory reset?</string>
+    <string name="factory_reset_description">This will clear all device configuration you have done.</string>
 </resources>