mes-engine/src/cache/LRU.ts

A powerful and flexible video processing framework for Node.js with support for multiple processing engines, adaptive streaming, and intelligent caching.

// cache/LRU.ts
export class LRU<T> {
    private maxSize: number;
    private cache: Map<string, T>;

    constructor(maxSize: number) {
        this.maxSize = maxSize;
        this.cache = new Map();
    }

    set(key: string, value: T): void {
        if (this.cache.has(key)) {
            this.cache.delete(key);
        } else if (this.cache.size >= this.maxSize) {
            const oldestKey = this.cache.keys().next().value;
            if (oldestKey !== undefined) {
                this.cache.delete(oldestKey);
            }
        }
        this.cache.set(key, value);
    }

    get(key: string): T | undefined {
        if (!this.cache.has(key)) return undefined;
        const value = this.cache.get(key)!;
        this.cache.delete(key);
        this.cache.set(key, value);
        return value;
    }

    clear(): void {
        this.cache.clear();
    }
}