545563e776
- Complete NestJS TypeScript implementation with WebSocket support - Direct messaging (DM) and group chat functionality - End-to-end encryption with AES encryption and key pairs - Media file support (images, videos, audio, documents) up to 100MB - Push notifications with Firebase Cloud Messaging integration - Mention alerts and real-time typing indicators - User authentication with JWT and Passport - SQLite database with TypeORM entities and relationships - Comprehensive API documentation with Swagger/OpenAPI - File upload handling with secure access control - Online/offline status tracking and presence management - Message editing, deletion, and reply functionality - Notification management with automatic cleanup - Health check endpoint for monitoring - CORS configuration for cross-origin requests - Environment-based configuration management - Structured for Flutter SDK integration Features implemented: ✅ Real-time messaging with Socket.IO ✅ User registration and authentication ✅ Direct messages and group chats ✅ Media file uploads and management ✅ End-to-end encryption ✅ Push notifications ✅ Mention alerts ✅ Typing indicators ✅ Message read receipts ✅ Online status tracking ✅ File access control ✅ Comprehensive API documentation Ready for Flutter SDK development and production deployment.
53 lines
1.4 KiB
Markdown
53 lines
1.4 KiB
Markdown
# path-exists [](https://travis-ci.org/sindresorhus/path-exists)
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> Check if a path exists
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NOTE: `fs.existsSync` has been un-deprecated in Node.js since 6.8.0. If you only need to check synchronously, this module is not needed.
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While [`fs.exists()`](https://nodejs.org/api/fs.html#fs_fs_exists_path_callback) is being [deprecated](https://github.com/iojs/io.js/issues/103), there's still a genuine use-case of being able to check if a path exists for other purposes than doing IO with it.
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Never use this before handling a file though:
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> In particular, checking if a file exists before opening it is an anti-pattern that leaves you vulnerable to race conditions: another process may remove the file between the calls to `fs.exists()` and `fs.open()`. Just open the file and handle the error when it's not there.
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## Install
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```
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$ npm install path-exists
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```
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## Usage
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```js
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// foo.js
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const pathExists = require('path-exists');
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(async () => {
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console.log(await pathExists('foo.js'));
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//=> true
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})();
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```
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## API
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### pathExists(path)
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Returns a `Promise<boolean>` of whether the path exists.
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### pathExists.sync(path)
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Returns a `boolean` of whether the path exists.
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## Related
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- [path-exists-cli](https://github.com/sindresorhus/path-exists-cli) - CLI for this module
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## License
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MIT © [Sindre Sorhus](https://sindresorhus.com)
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