inabox/InABox.Avalonia.Platform.Android/Bluetooth.Android.cs

using InABox.Avalonia.Platform;
using InABox.Core;
using Microsoft.Maui.ApplicationModel;
using Plugin.BLE;
using Plugin.BLE.Abstractions;
using Plugin.BLE.Abstractions.Contracts;

namespace InABox.Avalonia.Platform.Android;

public class Android_Bluetooth : IBluetooth
{
    public Logger? Logger { get; set; }
    
    public async Task<bool> IsAvailable()
    {
        try
        {
            PermissionStatus status = await Permissions.CheckStatusAsync<Permissions.Bluetooth>();
            if (status != PermissionStatus.Granted)
                status = await Permissions.RequestAsync<Permissions.Bluetooth>();
            return status == PermissionStatus.Granted;
        }
        catch (Exception e)
        {
            Console.WriteLine(e);
        }

        return false;


    }

    public async Task<bool> WriteAsync(string macaddress, Guid serviceid, Guid characteristicid, byte[] data)
    {
        if (await IsAvailable() != true)
            return false;
        
        IDevice? _device = null;
        var adapter = CrossBluetoothLE.Current.Adapter;
        adapter.DeviceDiscovered += (s, e) => _device = e.Device;
        try
        {
            var options = new ScanFilterOptions();
            options.DeviceAddresses = [macaddress];
            options.ServiceUuids = [serviceid];
            await adapter.StartScanningForDevicesAsync(options, x=> true, false);
        }
        catch (Exception e)
        {
            Console.WriteLine(e);
            Logger?.Error(e.Message);
        }
        
        if (_device != null)
        {
            try
            {
                //await adapter.StopScanningForDevicesAsync();
                //ConnectParameters connectParameters = new ConnectParameters(true, true);
                await adapter.ConnectToDeviceAsync(_device);
                try
                {
                    var service = await _device.GetServiceAsync(serviceid);
                    var characteristic = await service.GetCharacteristicAsync(characteristicid);
                    var bytes = await characteristic.ReadAsync();
                    await characteristic.WriteAsync(data);
                }
                catch (Exception e)
                {
                    Logger?.Error(e.Message);
                    return false;
                }
                await adapter.DisconnectDeviceAsync(_device);
                return true;
            }
            catch (Exception e)
            {
                Logger?.Error(e.Message);
                return false;
            }
           
            
        }
        return false;
    }
}