Implement hasPermissions API (#201)

* Implement hasPermissions api

* Bump minimum MacOS version to 10.15

* Apply suggestions from code review

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

windows/src/generated/universal_ble.g.cpp

@@ -612,6 +612,34 @@ void UniversalBlePlatformChannel::SetUp(
       channel.SetMessageHandler(nullptr);
     }
   }
+  {
+    BasicMessageChannel<> channel(binary_messenger, "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.hasPermissions" + prepended_suffix, &GetCodec());
+    if (api != nullptr) {
+      channel.SetMessageHandler([api](const EncodableValue& message, const flutter::MessageReply<EncodableValue>& reply) {
+        try {
+          const auto& args = std::get<EncodableList>(message);
+          const auto& encodable_with_android_fine_location_arg = args.at(0);
+          if (encodable_with_android_fine_location_arg.IsNull()) {
+            reply(WrapError("with_android_fine_location_arg unexpectedly null."));
+            return;
+          }
+          const auto& with_android_fine_location_arg = std::get<bool>(encodable_with_android_fine_location_arg);
+          ErrorOr<bool> output = api->HasPermissions(with_android_fine_location_arg);
+          if (output.has_error()) {
+            reply(WrapError(output.error()));
+            return;
+          }
+          EncodableList wrapped;
+          wrapped.push_back(EncodableValue(std::move(output).TakeValue()));
+          reply(EncodableValue(std::move(wrapped)));
+        } catch (const std::exception& exception) {
+          reply(WrapError(exception.what()));
+        }
+      });
+    } else {
+      channel.SetMessageHandler(nullptr);
+    }
+  }
   {
     BasicMessageChannel<> channel(binary_messenger, "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.requestPermissions" + prepended_suffix, &GetCodec());
     if (api != nullptr) {

windows/src/generated/universal_ble.g.h

@@ -387,6 +387,7 @@ class UniversalBlePlatformChannel {
   UniversalBlePlatformChannel& operator=(const UniversalBlePlatformChannel&) = delete;
   virtual ~UniversalBlePlatformChannel() {}
   virtual void GetBluetoothAvailabilityState(std::function<void(ErrorOr<int64_t> reply)> result) = 0;
+  virtual ErrorOr<bool> HasPermissions(bool with_android_fine_location) = 0;
   virtual void RequestPermissions(
     bool with_android_fine_location,
     std::function<void(std::optional<FlutterError> reply)> result) = 0;

windows/src/universal_ble_plugin.cpp

@@ -119,6 +119,11 @@ void UniversalBlePlugin::DisableBluetooth(
       });
 }
 
+ErrorOr<bool> UniversalBlePlugin::HasPermissions(bool with_android_fine_location) {
+  // Windows does not require runtime permissions for Bluetooth
+  return true;
+}
+
 void UniversalBlePlugin::RequestPermissions(
     bool with_android_fine_location,
     std::function<void(std::optional<FlutterError> reply)> result) {

windows/src/universal_ble_plugin.h

@@ -177,6 +177,7 @@ private:
   ErrorOr<bool> IsScanning() override;
   std::optional<FlutterError> Connect(const std::string &device_id) override;
   std::optional<FlutterError> Disconnect(const std::string &device_id) override;
+  ErrorOr<bool> HasPermissions(bool with_android_fine_location) override;
   void RequestPermissions(
       bool with_android_fine_location,
       std::function<void(std::optional<FlutterError> reply)> result) override;