Add power on button to disabled banner (#275)

* Add power on button to disabled banner

* lintage

Author: davertay-j

Topaz/TopazMain.swift

@@ -15,6 +15,7 @@ struct TopazMain: App {
     @State var appModel: AppModel
 
     init() {
+        BluetoothSystemState.shared.requestPowerOn = liveBluetoothPowerRequest
         let deviceSelector = DeviceSelector()
         self.appModel = AppModel(
             appDomainProcessors: appDomainProcessors(deviceSelector: deviceSelector),

lib/Sources/App/BluetoothErrorView.swift

@@ -5,9 +5,18 @@ import UIHelpers
 struct BluetoothErrorView: View {
 
     let state: SystemState
+    let onPowerUp: () -> Void
 
     @Environment(\.openURL) private var openURL
 
+    init(
+        state: SystemState,
+        onPowerUp: @escaping () -> Void = { }
+    ) {
+        self.state = state
+        self.onPowerUp = onPowerUp
+    }
+
     var body: some View {
         HStack(spacing: 16) {
             HStack(spacing: 8) {
@@ -29,6 +38,17 @@ struct BluetoothErrorView: View {
                 .frame(maxWidth: 88, minHeight: 40)
                 .background(Color.buttonDefault)
                 .cornerRadius(24)
+            } else if state == .poweredOff {
+                Button {
+                    onPowerUp()
+                } label: {
+                    Image(systemName: "power")
+                        .foregroundStyle(Color.textPrimaryInverse)
+                        .font(.headline)
+                }
+                .frame(maxWidth: 68, minHeight: 40)
+                .background(Color.buttonDefault)
+                .cornerRadius(24)
             }
         }
         .padding(.leading, 16)

lib/Sources/App/WebContainerModel.swift

@@ -44,4 +44,8 @@ public final class WebContainerModel {
         self.virtualKeyboard = virtualKeyboard
         self.bluetoothSystem = bluetoothSystem
     }
+
+    func requestPowerOn() {
+        bluetoothSystem.requestPowerOn()
+    }
 }

lib/Sources/App/WebContainerView.swift

@@ -30,7 +30,8 @@ struct WebContainerView: View {
                 VStack(spacing: 16) {
                     if webContainerModel.shouldShowErrorState {
                         BluetoothErrorView(
-                            state: webContainerModel.bluetoothSystem.systemState
+                            state: webContainerModel.bluetoothSystem.systemState,
+                            onPowerUp: webContainerModel.requestPowerOn
                         )
                     }
                     if webContainerModel.shouldShowNavBar {

lib/Sources/BluetoothEngine/BluetoothSystemState.swift

@@ -19,6 +19,8 @@ public final class BluetoothSystemState {
         guard newValue != .unknown else { return }
         self.systemState = newValue
     }
+
+    public var requestPowerOn: () -> Void = { }
 }
 
 public extension BluetoothSystemState {

lib/Sources/BluetoothNative/BluetoothPower.swift

@@ -0,0 +1,8 @@
+import CoreBluetooth
+
+public func liveBluetoothPowerRequest() {
+    let options: [String: Any] = [
+        CBCentralManagerOptionShowPowerAlertKey: true as NSNumber
+    ]
+    _ = CBCentralManager(delegate: nil, queue: nil, options: options)
+}