♻️ Splitting up ipc servers in unix and windows

lib/pods/activity/ipc_server.unix.dart

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+import 'dart:async';
+import 'dart:developer' as developer;
+import 'dart:io';
+import 'package:path/path.dart' as path;
+import 'ipc_server.dart';
+
+class UnixIpcServer extends IpcServer {
+  ServerSocket? _ipcServer;
+
+  @override
+  Future<void> start() async {
+    final ipcPath = await _findAvailableIpcPath();
+    _ipcServer = await ServerSocket.bind(
+      InternetAddress(ipcPath, type: InternetAddressType.unix),
+      0,
+    );
+    developer.log('IPC listening at $ipcPath', name: kRpcIpcLogPrefix);
+
+    _ipcServer!.listen((Socket socket) {
+      _onIpcConnection(socket);
+    });
+  }
+
+  @override
+  Future<void> stop() async {
+    for (var socket in sockets) {
+      try {
+        socket.close();
+      } catch (e) {
+        developer.log('Error closing IPC socket: $e', name: kRpcIpcLogPrefix);
+      }
+    }
+    sockets.clear();
+    await _ipcServer?.close();
+  }
+
+  // Handle new IPC connection
+  void _onIpcConnection(Socket socket) {
+    developer.log('New IPC connection!', name: kRpcIpcLogPrefix);
+
+    final socketWrapper = UnixIpcSocketWrapper(socket);
+    addSocket(socketWrapper);
+
+    socket.listen(
+      (data) => _onIpcData(socketWrapper, data),
+      onError: (e) {
+        developer.log('IPC socket error: $e', name: kRpcIpcLogPrefix);
+        socket.close();
+      },
+      onDone: () {
+        developer.log('IPC socket closed', name: kRpcIpcLogPrefix);
+        removeSocket(socketWrapper);
+      },
+    );
+  }
+
+  // Handle incoming IPC data
+  void _onIpcData(UnixIpcSocketWrapper socket, List<int> data) {
+    try {
+      socket.addData(data);
+      final packets = socket.readPackets();
+      for (final packet in packets) {
+        handlePacket?.call(socket, packet, {});
+      }
+    } catch (e) {
+      developer.log('IPC data error: $e', name: kRpcIpcLogPrefix);
+      socket.closeWithCode(IpcCloseCodes.closeUnsupported, e.toString());
+    }
+  }
+
+  // Handle IPC handshake
+  void _onIpcHandshake(
+    IpcSocketWrapper socket,
+    Map<String, dynamic> params,
+    Map<String, Function> handlers,
+  ) {
+    developer.log('IPC handshake: $params', name: kRpcIpcLogPrefix);
+
+    final ver = int.tryParse(params['v']?.toString() ?? '1') ?? 1;
+    final clientId = params['client_id']?.toString() ?? '';
+
+    if (ver != 1) {
+      developer.log(
+        'IPC unsupported version requested: $ver',
+        name: kRpcIpcLogPrefix,
+      );
+      socket.closeWithCode(IpcErrorCodes.invalidVersion);
+      return;
+    }
+
+    if (clientId.isEmpty) {
+      developer.log('IPC client ID required', name: kRpcIpcLogPrefix);
+      socket.closeWithCode(IpcErrorCodes.invalidClientId);
+      return;
+    }
+
+    socket.clientId = clientId;
+
+    handlers['connection']?.call(socket);
+  }
+
+  Future<String> _getMacOsSystemTmpDir() async {
+    final result = await Process.run('getconf', ['DARWIN_USER_TEMP_DIR']);
+    return (result.stdout as String).trim();
+  }
+
+  // Find available IPC socket path
+  Future<String> _findAvailableIpcPath() async {
+    // Build list of directories to try, with macOS-specific handling
+    final baseDirs = <String>[];
+
+    if (Platform.isMacOS) {
+      try {
+        final macTempDir = await _getMacOsSystemTmpDir();
+        if (macTempDir.isNotEmpty) {
+          baseDirs.add(macTempDir);
+        }
+      } catch (e) {
+        developer.log(
+          'Failed to get macOS system temp dir: $e',
+          name: kRpcIpcLogPrefix,
+        );
+      }
+    }
+
+    // Add other standard directories
+    final otherDirs = [
+      Platform.environment['XDG_RUNTIME_DIR'],
+      Platform.environment['TMPDIR'],
+      Platform.environment['TMP'],
+      Platform.environment['TEMP'],
+      '/tmp',
+    ];
+
+    baseDirs.addAll(
+      otherDirs.where((dir) => dir != null && dir.isNotEmpty).cast<String>(),
+    );
+
+    for (final baseDir in baseDirs) {
+      for (int i = 0; i < 10; i++) {
+        final socketPath = path.join(baseDir, 'discord-ipc-$i');
+        try {
+          final socket = await ServerSocket.bind(
+            InternetAddress(socketPath, type: InternetAddressType.unix),
+            0,
+          );
+          socket.close();
+          try {
+            await File(socketPath).delete();
+          } catch (_) {}
+          developer.log(
+            'IPC socket will be created at: $socketPath',
+            name: kRpcIpcLogPrefix,
+          );
+          return socketPath;
+        } catch (e) {
+          if (i == 0) {
+            developer.log(
+              'IPC path $socketPath not available: $e',
+              name: kRpcIpcLogPrefix,
+            );
+          }
+          continue;
+        }
+      }
+    }
+    throw Exception(
+      'No available IPC socket paths found in any temp directory',
+    );
+  }
+}
+
+class UnixIpcSocketWrapper extends IpcSocketWrapper {
+  final Socket socket;
+
+  UnixIpcSocketWrapper(this.socket);
+
+  @override
+  void send(Map<String, dynamic> msg) {
+    developer.log('IPC sending: $msg', name: kRpcIpcLogPrefix);
+    final packet = IpcServer.encodeIpcPacket(IpcTypes.frame, msg);
+    socket.add(packet);
+  }
+
+  @override
+  void sendPong(dynamic data) {
+    final packet = IpcServer.encodeIpcPacket(IpcTypes.pong, data ?? {});
+    socket.add(packet);
+  }
+
+  @override
+  void close() {
+    socket.close();
+  }
+
+  @override
+  void closeWithCode(int code, [String message = '']) {
+    final closeData = {'code': code, 'message': message};
+    final packet = IpcServer.encodeIpcPacket(IpcTypes.close, closeData);
+    socket.add(packet);
+    socket.close();
+  }
+}