feat(install): added basis install process

Now it is able to install apps from the render process and properly display logs on the app detial page.

electron/main/backend/download-manager.ts

@@ -0,0 +1,168 @@
+import { ipcMain, WebContents } from 'electron';
+import { spawn, ChildProcess, exec } from 'node:child_process';
+import readline from 'node:readline';
+import { promisify } from 'node:util';
+import pino from 'pino';
+
+const logger = pino({ 'name': 'download-manager' });
+
+type DownloadTask = {
+  id: number;
+  execCommand: string;
+  execParams: string[];
+  process: ChildProcess | null;
+  webContents: WebContents | null;
+};
+
+const tasks = new Map<number, DownloadTask>();
+
+let idle = true; // Indicates if the installation manager is idle
+
+// Listen for download requests from renderer process
+ipcMain.on('queue-install', async (event, download) => {
+  const { id, pkgname } = download || {};
+
+  if (!id || !pkgname) {
+    logger.warn('passed arguments missing id or pkgname');
+    return;
+  }
+
+  logger.info(`收到下载任务: ${id},  软件包名称: ${pkgname}`);
+  
+  // 避免重复添加同一任务
+  if (tasks.has(id)) {
+    tasks.get(id)?.webContents.send('install-log', {
+      id,
+      time: Date.now(),
+      message: `任务id： ${id} 已在列表中，忽略重复添加`
+    });
+    tasks.get(id)?.webContents.send('install-complete', {
+      id: id,
+      success: false,
+      time: Date.now(),
+      exitCode: -1,
+      message: `{"message":"任务id： ${id} 已在列表中，忽略重复添加","stdout":"","stderr":""}`
+    });
+    return;
+  }
+
+  const webContents = event.sender;
+
+  // 开始组装安装命令
+  const execAsync = promisify(exec);
+  let superUserCmd = '';
+  if (process.getuid && process.getuid() !== 0) {
+    const { stdout, stderr } = await execAsync('which pkexec');
+    if (stderr) {
+      logger.error('没有找到 pkexec 命令');
+      return;
+    }
+    logger.info(`找到提升权限命令: ${stdout.trim()}`);
+    superUserCmd = stdout.trim();
+
+    if (superUserCmd.length === 0) {
+      logger.error('没有找到提升权限的命令 pkexec, 无法继续安装');
+      webContents.send('install-error', {
+        id,
+        time: Date.now(),
+        message: '无法找到提升权限的命令 pkexec，请手动安装'
+      });
+      return;
+    }
+  }
+
+  let execCommand = '';
+  let execParams = [];
+  if (superUserCmd.length > 0) {
+    execCommand = superUserCmd;
+    execParams.push('/usr/bin/apm');
+  } else {
+    execCommand = '/usr/bin/apm';
+  }
+  execParams.push('install', '-y', pkgname);
+
+  const task: DownloadTask = {
+    id,
+    execCommand,
+    execParams,
+    process: null,
+    webContents
+  };
+  tasks.set(id, task);
+  if (idle) processNextInQueue(0);
+});
+
+function processNextInQueue(index: number) {
+  if (!idle) return;
+
+  idle = false;
+  const task = Array.from(tasks.values())[index];
+  const webContents = task.webContents;
+  let stdoutData = '';
+  let stderrData = '';
+
+  webContents.send('install-status', {
+    id: task.id,
+    time: Date.now(),
+    message: 'installing'
+  })
+  webContents.send('install-log', {
+    id: task.id,
+    time: Date.now(),
+    message: `开始执行: ${task.execCommand} ${task.execParams.join(' ')}`
+  });
+  logger.info(`启动安装命令: ${task.execCommand} ${task.execParams.join(' ')}`);
+
+  const child = spawn(task.execCommand, task.execParams, {
+    shell: true,
+    env: process.env
+  });
+  task.process = child;
+
+  // 监听 stdout
+  child.stdout.on('data', (data) => {
+    stdoutData += data.toString();
+    webContents.send('install-log', {
+      id: task.id,
+      time: Date.now(),
+      message: data.toString()
+    });
+  });
+
+  // 监听 stderr
+  child.stderr.on('data', (data) => {
+    stderrData += data.toString();
+    webContents.send('install-log', {
+      id: task.id,
+      time: Date.now(),
+      message: data.toString()
+    });
+  });
+  child.on('close', (code) => {
+    const success = code === 0;
+    // 拼接json消息
+    const messageJSONObj = {
+      message: success ? '安装完成' : `安装失败，退出码 ${code}`,
+      stdout: stdoutData,
+      stderr: stderrData
+    };
+
+    if (success) {
+      logger.info(messageJSONObj);
+    } else {
+      logger.error(messageJSONObj);
+    }
+
+    webContents.send('install-complete', {
+      id: task.id,
+      success: success,
+      time: Date.now(),
+      exitCode: code,
+      message: JSON.stringify(messageJSONObj)
+    });
+    tasks.delete(task.id);
+    idle = true;
+    if (tasks.size > 0)
+      processNextInQueue(0);
+  });
+}