var-proxy/src/module/get-user-app.ts

import path from 'path';
import { redis, subscriber } from './redis/redis.ts';
import { useFileStore } from '@abearxiong/use-file-store';
import { useConfig } from '@abearxiong/use-config';
import fs from 'fs';
import crypto from 'crypto';
import { nanoid } from 'nanoid';
import { pipeline } from 'stream';
import { promisify } from 'util';
const pipelineAsync = promisify(pipeline);

const { resources } = useConfig<{ resources: string }>();
const fileStore = useFileStore('upload');

const demoData = {
  user: 'root',
  key: 'codeflow',
  appType: 'web-single', //
  version: '1.0.0',
  domain: null,
  type: 'local',
  data: {
    files: [
      {
        name: 'index.html',
        path: 'codeflow/index.html',
      },
      {
        name: 'assets/index-14y4J8dP.js',
        path: 'codeflow/assets/index-14y4J8dP.js',
      },
      {
        name: 'assets/index-C-libw4a.css',
        path: 'codeflow/assets/index-C-libw4a.css',
      },
    ],
  },
};
const demoData2 = {
  user: 'root',
  key: 'codeflow',
  appType: 'web-single', //
  version: '0.0.1',
  domain: null,
  type: 'oss', // 是否使用oss
  data: {
    files: [
      {
        name: 'index.html',
        path: 'root/codeflow/0.0.1/index.html',
      },
      {
        name: 'assets/index-14y4J8dP.js',
        path: 'root/codeflow/0.0.1/assets/index-14y4J8dP.js',
      },
      {
        name: 'assets/index-C-libw4a.css',
        path: 'root/codeflow/0.0.1/assets/index-C-libw4a.css',
      },
    ],
  },
};
type UserAppOptions = {
  user: string;
  app: string;
};
export class UserApp {
  user: string;
  app: string;
  constructor(options: UserAppOptions) {
    this.user = options.user;
    this.app = options.app;
  }
  async getExist() {
    const app = this.app;
    const user = this.user;
    const key = 'user:app:exist:' + app + ':' + user;
    const value = await redis.get(key);
    return value;
  }
  async getCache() {
    const app = this.app;
    const user = this.user;
    const key = 'user:app:' + app + ':' + user;
    const value = await redis.get(key);
    if (!value) {
      return null;
    }
  }
  async getFile(appFileUrl: string) {
    const app = this.app;
    const user = this.user;
    const key = 'user:app:set:' + app + ':' + user;
    const value = await redis.hget(key, appFileUrl);
    return value;
  }
  async setCacheData() {
    const app = this.app;
    const user = this.user;
    const key = 'user:app:' + app + ':' + user;
    // 如果demoData 不存在则返回
    if (!demoData2) {
      return false;
    }
    const value = await downloadUserAppFiles(user, app, demoData2);
    const valueIndexHtml = value.data.files.find((file) => file.name === 'index.html');
    await redis.set(key, JSON.stringify(value));
    await redis.set('user:app:exist:' + app + ':' + user, valueIndexHtml.path, 'EX', 60 * 60 * 24 * 7); // 24小时
    const files = value.data.files;
    // await redis.hset(key, 'files', JSON.stringify(files));
    const data = {};

    // 将文件名和路径添加到 `data` 对象中
    files.forEach((file) => {
      data[file.name] = file.path;
    });
    await redis.hset('user:app:set:' + app + ':' + user, data);

    return true;
  }
  async getAllCacheData() {
    const app = this.app;
    const user = this.user;
    const key = 'user:app:' + app + ':' + user;
    const value = await redis.get(key);
    console.log('getAllCacheData', JSON.parse(value));
    const exist = await redis.get('user:app:exist:' + app + ':' + user);
    console.log('getAllCacheData:exist', exist);
    const files = await redis.hgetall('user:app:set:' + app + ':' + user);
    console.log('getAllCacheData:files', files);
  }
  async clearCacheData() {
    const app = this.app;
    const user = this.user;
    const key = 'user:app:' + app + ':' + user;
    await redis.del(key);
    await redis.del('user:app:exist:' + app + ':' + user);
    await redis.del('user:app:set:' + app + ':' + user);
    console.log('clear user data', key);
    // 删除所有文件
    deleteUserAppFiles(user, app);
  }
  async getData() {
    return demoData;
  }
  async close() {
    // 关闭连接
    await redis.quit();
  }
}
export const downloadUserAppFiles = async (user: string, app: string, data: typeof demoData) => {
  const {
    data: { files, ...dataRest },
    ...rest
  } = data;
  const uploadFiles = path.join(fileStore, user, app);
  if (!checkFileExistsSync(uploadFiles)) {
    fs.mkdirSync(uploadFiles, { recursive: true });
  }
  const newFiles = [];
  if (data.type === 'local') {
    // local copy file
    for (let i = 0; i < files.length; i++) {
      const file = files[i];
      const copyFile = path.join(fileStore, file.path);
      const destFile = path.join(uploadFiles, file.name);
      const destDir = path.dirname(destFile); // 获取目标文件所在的目录路径
      // 检查目录是否存在，如果不存在则创建
      if (!checkFileExistsSync(destDir)) {
        fs.mkdirSync(destDir, { recursive: true }); // 递归创建目录
      }
      fs.copyFileSync(copyFile, destFile);
      // const etag = await setEtag(fs.readFileSync(destFile, 'utf-8'));
      const etag = nanoid();
      newFiles.push({
        name: file.name,
        path: destFile.replace(fileStore, '') + '||' + etag,
      });
    }
  }
  if (data.type === 'oss') {
    const serverPath = 'https://' + resources + '/';
    // server download file
    for (let i = 0; i < files.length; i++) {
      const file = files[i];
      const destFile = path.join(uploadFiles, file.name);
      const destDir = path.dirname(destFile); // 获取目标文件所在的目录路径
      // 检查目录是否存在，如果不存在则创建
      if (!checkFileExistsSync(destDir)) {
        fs.mkdirSync(destDir, { recursive: true }); // 递归创建目录
      }
      // 下载文件到 destFile
      await downloadFile(serverPath + file.path, destFile);
      const etag = nanoid();
      newFiles.push({
        name: file.name,
        path: destFile.replace(fileStore, '') + '||' + etag,
      });
    }
  }

  return {
    ...rest,
    data: {
      ...dataRest,
      files: newFiles,
    },
  };
};
export const checkFileExistsSync = (filePath: string) => {
  try {
    // 使用 F_OK 检查文件或目录是否存在
    fs.accessSync(filePath, fs.constants.F_OK);
    return true;
  } catch (err) {
    return false;
  }
};
export const deleteUserAppFiles = async (user: string, app: string) => {
  const uploadFiles = path.join(fileStore, user, app);
  try {
    fs.rmSync(uploadFiles, { recursive: true });
  } catch (err) {
    console.error('deleteUserAppFiles', err);
  }
  // console.log('deleteUserAppFiles', res);
};
async function downloadFile(fileUrl: string, destFile: string) {
  const res = await fetch(fileUrl);

  if (!res.ok) {
    throw new Error(`Failed to fetch ${fileUrl}: ${res.statusText}`);
  }
  console.log('destFile', destFile);
  const destStream = fs.createWriteStream(destFile);

  // 使用 `pipeline` 将 `res.body` 中的数据传递给 `destStream`
  await pipelineAsync(res.body, destStream);

  console.log(`File downloaded to ${destFile}`);
}

export const clearAllUserApp = async () => {
  // redis 删除 所有的 user:app:*
  const keys = await redis.keys('user:app:*');
  console.log('clearAllUserApp', keys);
  if (keys.length > 0) {
    const pipeline = redis.pipeline();
    keys.forEach((key) => pipeline.del(key)); // 将每个键的删除操作添加到 pipeline 中
    await pipeline.exec(); // 执行 pipeline 中的所有命令
    console.log('All keys deleted successfully using pipeline');
  }
};
export const setEtag = async (fileContent: string) => {
  const eTag = crypto.createHash('md5').update(fileContent).digest('hex');
  return eTag;
};

// redis 监听 user:app:exist:*的过期
subscriber.on('ready', () => {
  console.log('Subscriber is ready and connected.');
});

// 订阅 Redis 频道
subscriber.subscribe('__keyevent@0__:expired', (err, count) => {
  if (err) {
    console.error('Failed to subscribe: ', err);
  } else {
    console.log(`Subscribed to ${count} channel(s). Waiting for expired events...`);
  }
});

// 监听消息事件
subscriber.on('message', (channel, message) => {
  // 检查是否匹配 user:app:exist:* 模式
  if (message.startsWith('user:app:exist:')) {
    const [_user, _app, _exist, app, user] = message.split(':');
    // 在这里执行你的逻辑，例如清理缓存或通知用户
    console.log('User app exist key expired:', app, user);
    const userApp = new UserApp({ user, app });
    userApp.clearCacheData();
  }
});