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.
28 lines
978 B
JavaScript
28 lines
978 B
JavaScript
import isArrayLike from './_isArrayLike.js';
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import values from './values.js';
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import getLength from './_getLength.js';
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import random from './random.js';
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import toArray from './toArray.js';
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// Sample **n** random values from a collection using the modern version of the
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// [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher–Yates_shuffle).
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// If **n** is not specified, returns a single random element.
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// The internal `guard` argument allows it to work with `_.map`.
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export default function sample(obj, n, guard) {
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if (n == null || guard) {
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if (!isArrayLike(obj)) obj = values(obj);
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return obj[random(obj.length - 1)];
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}
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var sample = toArray(obj);
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var length = getLength(sample);
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n = Math.max(Math.min(n, length), 0);
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var last = length - 1;
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for (var index = 0; index < n; index++) {
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var rand = random(index, last);
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var temp = sample[index];
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sample[index] = sample[rand];
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sample[rand] = temp;
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}
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return sample.slice(0, n);
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}
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