Cache Service

## Source Code File: `src/utils/services/cache.service.ts` ```typescript import { Injectable } from '@angular/core'; interface CacheEntry { data: T; timestamp: number; } const cacheDuration = 60 * 1000 * 60; @Injectable({ providedIn: 'root' }) export class CacheService { private cache = new Map(); setCache(id: string, data: T) { const entry: CacheEntry = { data, timestamp: Date.now(), }; this.cache.set(id, entry); } getCache(id: string) { const cachedResponse = this.cache.get(id); if (cachedResponse && this.isCacheValid(cachedResponse)) { return cachedResponse.data as T; } return; } private isCacheValid(cacheEntry: CacheEntry): boolean { return Date.now() - cacheEntry.timestamp < cacheDuration; } } ``` ## Description The `CacheService` is an Angular service that provides simple in-memory caching with automatic expiration. ### Features - **Generic Type Support**: Methods use TypeScript generics for type-safe cache storage and retrieval - **Automatic Expiration**: Cached entries expire after 60 minutes (3,600,000 milliseconds) - **Simple API**: Two main methods for setting and getting cached data - **Singleton Service**: Provided in root, ensuring single instance across the application ### Methods **setCache(id: string, data: T)**: Stores data in cache with a unique identifier and current timestamp **getCache(id: string)**: Retrieves cached data if it exists and hasn't expired, returns undefined otherwise ### Cache Duration Default cache duration is set to 60 minutes. Expired entries are automatically ignored during retrieval.