build: Add build process for newgui (#7351)

next-gen-gui/src/app/services/request-cache.service.ts

@@ -0,0 +1,50 @@
+import { Injectable } from '@angular/core';
+import { HttpResponse, HttpRequest } from '@angular/common/http';
+
+export interface RequestCacheEntry {
+  url: string;
+  response: HttpResponse<any>;
+  lastRead: number;
+}
+
+const maxAge = 30000; // milliseconds
+
+@Injectable({
+  providedIn: 'root'
+})
+export class RequestCacheService {
+  private cache: Map<string, RequestCacheEntry> = new Map();
+
+  constructor() { }
+
+  get(req: HttpRequest<any>): HttpResponse<any> | undefined {
+    const url = req.urlWithParams;
+    const cached = this.cache.get(url);
+
+    if (!cached) {
+      return undefined;
+    }
+
+    const isExpired = cached.lastRead < (Date.now() - maxAge);
+    return isExpired ? undefined : cached.response;
+  }
+
+  put(req: HttpRequest<any>, response: HttpResponse<any>): void {
+    const url = req.urlWithParams;
+
+    const entry = { url, response, lastRead: Date.now() };
+    this.cache.set(url, entry);
+
+    // Remove expired cache entries
+    const expired = Date.now() - maxAge;
+    this.cache.forEach(entry => {
+      if (entry.lastRead < expired) {
+        this.cache.delete(entry.url);
+      }
+    });
+  }
+
+  clearAll(): void {
+    this.cache = new Map();
+  }
+}