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using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Threading;
namespace GodotTools.IdeConnection
{
public abstract class GodotIdeClient : GodotIdeBase
{
protected GodotIdeMetadata GodotIdeMetadata;
private readonly FileSystemWatcher fsWatcher;
protected GodotIdeClient(string projectMetadataDir) : base(projectMetadataDir)
{
messageHandlers = InitializeMessageHandlers();
// FileSystemWatcher requires an existing directory
if (!File.Exists(projectMetadataDir))
Directory.CreateDirectory(projectMetadataDir);
fsWatcher = new FileSystemWatcher(projectMetadataDir, MetaFileName);
}
private void OnMetaFileChanged(object sender, FileSystemEventArgs e)
{
if (IsDisposed)
return;
lock (ConnectionLock)
{
if (IsDisposed)
return;
if (!File.Exists(MetaFilePath))
return;
var metadata = ReadMetadataFile();
if (metadata != null && metadata != GodotIdeMetadata)
{
GodotIdeMetadata = metadata.Value;
ConnectToServer();
}
}
}
private void OnMetaFileDeleted(object sender, FileSystemEventArgs e)
{
if (IsDisposed)
return;
if (IsConnected)
DisposeConnection();
// The file may have been re-created
lock (ConnectionLock)
{
if (IsDisposed)
return;
if (IsConnected || !File.Exists(MetaFilePath))
return;
var metadata = ReadMetadataFile();
if (metadata != null)
{
GodotIdeMetadata = metadata.Value;
ConnectToServer();
}
}
}
private GodotIdeMetadata? ReadMetadataFile()
{
using (var reader = File.OpenText(MetaFilePath))
{
string portStr = reader.ReadLine();
if (portStr == null)
return null;
string editorExecutablePath = reader.ReadLine();
if (editorExecutablePath == null)
return null;
if (!int.TryParse(portStr, out int port))
return null;
return new GodotIdeMetadata(port, editorExecutablePath);
}
}
private void ConnectToServer()
{
var tcpClient = new TcpClient();
Connection = new GodotIdeConnectionClient(tcpClient, HandleMessage);
Connection.Logger = Logger;
try
{
Logger.LogInfo("Connecting to Godot Ide Server");
tcpClient.Connect(IPAddress.Loopback, GodotIdeMetadata.Port);
Logger.LogInfo("Connection open with Godot Ide Server");
var clientThread = new Thread(Connection.Start)
{
IsBackground = true,
Name = "Godot Ide Connection Client"
};
clientThread.Start();
}
catch (SocketException e)
{
if (e.SocketErrorCode == SocketError.ConnectionRefused)
Logger.LogError("The connection to the Godot Ide Server was refused");
else
throw;
}
}
public void Start()
{
Logger.LogInfo("Starting Godot Ide Client");
fsWatcher.Changed += OnMetaFileChanged;
fsWatcher.Deleted += OnMetaFileDeleted;
fsWatcher.EnableRaisingEvents = true;
lock (ConnectionLock)
{
if (IsDisposed)
return;
if (!File.Exists(MetaFilePath))
{
Logger.LogInfo("There is no Godot Ide Server running");
return;
}
var metadata = ReadMetadataFile();
if (metadata != null)
{
GodotIdeMetadata = metadata.Value;
ConnectToServer();
}
else
{
Logger.LogError("Failed to read Godot Ide metadata file");
}
}
}
public bool WriteMessage(Message message)
{
return Connection.WriteMessage(message);
}
protected override void Dispose(bool disposing)
{
base.Dispose(disposing);
if (disposing)
{
fsWatcher?.Dispose();
}
}
protected virtual bool HandleMessage(Message message)
{
if (messageHandlers.TryGetValue(message.Id, out var action))
{
action(message.Arguments);
return true;
}
return false;
}
private readonly Dictionary<string, Action<string[]>> messageHandlers;
private Dictionary<string, Action<string[]>> InitializeMessageHandlers()
{
return new Dictionary<string, Action<string[]>>
{
["OpenFile"] = args =>
{
switch (args.Length)
{
case 1:
OpenFile(file: args[0]);
return;
case 2:
OpenFile(file: args[0], line: int.Parse(args[1]));
return;
case 3:
OpenFile(file: args[0], line: int.Parse(args[1]), column: int.Parse(args[2]));
return;
default:
throw new ArgumentException();
}
}
};
}
protected abstract void OpenFile(string file);
protected abstract void OpenFile(string file, int line);
protected abstract void OpenFile(string file, int line, int column);
}
}
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