python service managment on client, port configuration

electron-ui/src/main/service.ts

@@ -0,0 +1,79 @@
+import { spawn, ChildProcessWithoutNullStreams } from 'child_process';
+import path from 'path';
+
+export default class PythonSubprocessManager {
+  // eslint-disable-next-line no-use-before-define
+  public static instance: PythonSubprocessManager | null = null;
+
+  private process: ChildProcessWithoutNullStreams | null = null;
+
+  private scriptPath: string;
+
+  private working_dir: string = path.join(
+    __dirname,
+    '..',
+    '..',
+    '..',
+    'audio-service',
+  );
+
+  public portNumber: number | null = null;
+
+  constructor(scriptPath: string) {
+    this.scriptPath = scriptPath;
+    PythonSubprocessManager.instance = this;
+  }
+
+  start(args: string[] = []): void {
+    if (this.process) {
+      throw new Error('Process already running.');
+    }
+    console.log(`Using Python working directory at: ${this.working_dir}`);
+    console.log(`Starting Python subprocess with script: ${this.scriptPath}`);
+    this.process = spawn(
+      'venv/Scripts/python.exe',
+      [this.scriptPath, ...args],
+      {
+        cwd: this.working_dir,
+        detached: false,
+        stdio: 'pipe',
+      },
+    );
+    this.process.stdout.on('data', (data: Buffer) => {
+      console.log(`Python stdout: ${data.toString()}`);
+    });
+    this.process.stderr.on('data', (data: Buffer) => {
+      console.error(`Python stderr: ${data.toString()}`);
+      const lines = data.toString().split('\n');
+      // eslint-disable-next-line no-restricted-syntax
+      for (const line of lines) {
+        const match = line.match(/Running on .*:(\d+)/);
+        if (match) {
+          const port = parseInt(match[1], 10);
+          console.log(`Detected port: ${port}`);
+          this.portNumber = port;
+        }
+      }
+    });
+    this.process.on('exit', () => {
+      console.log('Python subprocess exited.');
+      this.process = null;
+    });
+  }
+
+  stop(): void {
+    if (this.process) {
+      this.process.kill();
+      this.process = null;
+    }
+  }
+
+  restart(args: string[] = []): void {
+    this.stop();
+    this.start(args);
+  }
+
+  isHealthy(): boolean {
+    return !!this.process && !this.process.killed;
+  }
+}