feat: add setup/cache page

src/services/cache.service.ts

@@ -0,0 +1,65 @@
+import {Injectable} from '@angular/core';
+
+interface CacheEntry<T> {
+  data: T;
+  expiry: number;
+}
+
+@Injectable({
+  providedIn: 'root'
+})
+export class CacheService {
+  private handleQuotaExceeded(): void {
+    const keys: string[] = [];
+    const expiries: number[] = [];
+
+    for (let i = 0; i < localStorage.length; i++) {
+      const key = localStorage.key(i);
+      if (!key) continue;
+
+      const cacheEntry = JSON.parse(localStorage.getItem(key) as string) as CacheEntry<any>;
+      keys.push(key);
+      expiries.push(cacheEntry.expiry);
+    }
+
+    // Удаляем самый старый элемент
+    const oldestIndex = expiries.indexOf(Math.min(...expiries));
+    localStorage.removeItem(keys[oldestIndex]);
+  }
+
+  private isQuotaExceededError(e: unknown): e is DOMException {
+    return e instanceof DOMException && (
+      e.name === 'QuotaExceededError' ||
+      e.name === 'NS_ERROR_DOM_QUOTA_REACHED'
+    );
+  }
+
+  set<T>(key: string, data: T, ttl: number): void {
+    const expiry = Date.now() + ttl;
+    const cacheEntry: CacheEntry<T> = {data, expiry};
+
+    try {
+      localStorage.setItem(key, JSON.stringify(cacheEntry));
+    } catch (e) {
+      if (this.isQuotaExceededError(e)) {
+        this.handleQuotaExceeded();
+        localStorage.setItem(key, JSON.stringify(cacheEntry));
+      } else {
+        throw e;
+      }
+    }
+  }
+
+  get<T>(key: string): T | null {
+    const cached = localStorage.getItem(key);
+    if (!cached) return null;
+
+    const cacheEntry = JSON.parse(cached) as CacheEntry<T>;
+    if (Date.now() > cacheEntry.expiry) {
+      localStorage.removeItem(key);
+      return null;
+    }
+
+    return cacheEntry.data;
+  }
+}