import {HttpRequest, HttpResponse} from '@angular/common/http';
import {Injectable} from '@angular/core';

abstract class HttpCache {
    abstract get(req: HttpRequest<any>): HttpResponse<any> | null;

    abstract put(req: HttpRequest<any>, resp: HttpResponse<any>): void;

    abstract clearCache(): void;
}

@Injectable()
export class HttpCacheService implements HttpCache {

    private cache = {};
    private previousIdList = {};
    private routeCache = {};
    private routeGroupSelectCache = {};

    get(req: HttpRequest<any>): HttpResponse<any> | null {
        return this.cache[req.urlWithParams];
    }

    put(req: HttpRequest<any>, resp: HttpResponse<any>): void {
        this.cache[req.urlWithParams] = resp;
    }


    getPreviousId(id: string): string | null {
        return this.previousIdList[id];
    }

    setPreviousId(id: string, prev: string): void {
        this.previousIdList[id] = prev;
    }

    getRouteCache(id: string): string | null {
        return this.routeCache[id];
    }

    setRouteCache(id: string, route: string): void {
        this.routeCache[id] = route;
    }

    getRouteGroupCache(id: string): string | null {
        return this.routeGroupSelectCache[id];
    }

    setRouteGroupCache(id: string, group: string): void {
        this.routeGroupSelectCache[id] = group;
    }

    clearCache(): void {
        this.cache = {};
        this.previousIdList = {};
        this.routeCache = {};
        this.routeGroupSelectCache = {};
    }
}