Innovenergy_trunk/csharp/App/BmsTunnel/BatteryConnection.cs

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using CliWrap;
using CliWrap.Buffered;
using InnovEnergy.Lib.Utils;
using static InnovEnergy.App.BmsTunnel.CliPrograms;
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namespace InnovEnergy.App.BmsTunnel;
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using Nodes = IReadOnlyList<Byte>;
public readonly struct BatteryConnection
{
public String Tty { get; }
public Nodes Nodes { get; }
private BatteryConnection(String tty, Nodes nodes)
{
Tty = tty;
Nodes = nodes;
}
private BatteryConnection(String tty, params Byte[] nodes) : this(tty, (Nodes) nodes)
{
}
public static async Task<BatteryConnection?> Connect(SshHost? host = null)
{
Console.WriteLine("searching battery connection...");
return await GetConnectionFromDBus(host)
?? await GetConnectionFromDevTty(host);
}
private static async Task<BatteryConnection?> GetConnectionFromDevTty(SshHost? host)
{
var fs = FileSystem.OnHost(host);
var ttys = await fs.GetFiles("/dev", FileType.CharacterDevice);
var candidateTtys = ttys
.Where(f => f.Contains("ttyUSB"))
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.Select(t => t.Split("/").LastOrDefault())
.NotNull()
.ToList();
if (!candidateTtys.Any())
{
Console.WriteLine("no USB converter cable attached!");
return null;
}
var userSelectedTty = "Select TTY:".ChooseFrom(candidateTtys);
return userSelectedTty != null
? new BatteryConnection(userSelectedTty)
: null;
}
private static async Task<BatteryConnection?> GetConnectionFromDBus(SshHost? host)
{
var tty = await LsDBus
.OnHost(host)
.ExecuteBufferedAsync()
.Select(ParseBatteryTty);
if (tty == null)
return null;
Console.WriteLine("found battery on DBus");
var availableNodes = await GetNodes(tty, host);
return new BatteryConnection(tty, availableNodes);
}
private static CommandTask<Nodes> GetNodes(String tty, SshHost? host = null)
{
const String defaultArgs = "--system --print-reply --type=method_call / com.victronenergy.BusItem.GetValue";
return DBusSend
.OnHost(host)
.AppendArgument($"--dest=com.victronenergy.battery.{tty}")
.AppendArgument(defaultArgs)
.ExecuteBufferedAsync()
.Select(ParseBatteryNodes);
}
private static Nodes ParseBatteryNodes(BufferedCommandResult result)
{
return result
.StandardOutput
.Split(Environment.NewLine)
.Where(l => l.Contains("_Battery/"))
.Select(l => l.Split('/')[1])
.Where(n => Byte.TryParse(n, out _))
.Select(Byte.Parse)
.Distinct()
.OrderBy(n => n)
.ToList();
}
private static String? ParseBatteryTty(BufferedCommandResult result)
{
return result
.StandardOutput
.Split(Environment.NewLine)
.Where(l => l.Contains("com.victronenergy.battery."))
.SelectMany(l => l.Split('.'))
.LastOrDefault();
}
}