svelte-guardian/dist/features/rate-limiting/index.js

Batteries included authentication for SvelteKit applications.

import { RedisRateLimiter } from './redis';
import { UpstashRedisRateLimiter } from './upstash-redis';
import { InMemoryRateLimiter } from './in-memory';
export class RateLimiterFactory {
    static instance;
    static create(config) {
        // Check if rate limiting is disabled
        if (config.enabled === false) {
            return {
                limit: async () => ({
                    allowed: true,
                    remaining: Number.MAX_SAFE_INTEGER,
                    resetTime: Date.now()
                })
            };
        }
        // Convert requestsPerMinute to existing configuration
        if (config.requestsPerMinute !== undefined) {
            config.maxRequests = config.requestsPerMinute;
            config.windowMs = 60 * 1000; // 1 minute
        }
        // Ensure maxRequests is set
        config.maxRequests = config.maxRequests || 10;
        config.windowMs = config.windowMs || 60 * 1000;
        // Use singleton pattern to reuse rate limiter
        if (this.instance)
            return this.instance;
        switch (config.strategy || 'memory') {
            case 'redis':
                if (!config.redisConfig) {
                    throw new Error('Redis configuration is required for Redis strategy');
                }
                this.instance = new RedisRateLimiter(config.redisConfig);
                break;
            case 'upstash-redis':
                if (!config.redisConfig) {
                    throw new Error('Redis configuration is required for Uostash Redis strategy');
                }
                this.instance = new UpstashRedisRateLimiter(config.redisConfig.url, config.redisConfig.token);
                break;
            case 'memory':
            default:
                this.instance = new InMemoryRateLimiter();
                break;
        }
        return this.instance;
    }
}