diet-web-ui/projects/admin/src/app/services/http.interceptor.ts

import { Inject, Injectable } from "@angular/core";
import {
	HttpRequest,
	HttpHandler,
	HttpEvent,
	HttpInterceptor,
	HttpErrorResponse,
	HttpResponse,
} from "@angular/common/http";
import { catchError, Observable, switchMap, tap, throwError, timer } from "rxjs";
import { Router } from "@angular/router";
import { NzMessageService } from "ng-zorro-antd/message";
import { ResponseType } from "@cdk/types";

@Injectable({ providedIn: "root" })
export class HTTPInterceptor implements HttpInterceptor {
	constructor(private router: Router, private msg: NzMessageService) {}

	private msgFlag = false;

	private localStroageKey = "catering";

	intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
		const token = localStorage.getItem(this.localStroageKey);

		if (token) {
			req = req.clone({
				// headers: req.headers.set('Authorization', `Bearer ${token}`),
				headers: req.headers.set("Authorization", token),
			});
		}

		return this.handleResult(next, req);
	}

	private handleResult(next: HttpHandler, authReq: HttpRequest<any>): Observable<HttpEvent<any>> {
		return next.handle(authReq).pipe(
			tap((res) => {
				if (res instanceof HttpResponse) {
					const Authorization = res.headers.get("Authorization");
					if (Authorization) {
						localStorage.setItem(this.localStroageKey, Authorization);
					}

					// if (this.decConfig.triggerError) {
					// 	this.decConfig.triggerError(res);
					// }

					if (res.body?.success === false && res.body.desc) {
						throw new HttpErrorResponse({ error: res.body });
					}
				}
			}),

			catchError((err: HttpErrorResponse) => {
				const throwErr = throwError(() => err);
				if (this.msgFlag) {
					return throwErr;
				}

				setTimeout(() => {
					this.msgFlag = false;
				}, 1500);
				const error: ResponseType = err.error;
				this.msgFlag = true;

				if (error.success === false) {
					this.msg.error(error.desc);
					switch (error.code) {
						case 401:
							this.router.navigate(["/", "login"]);
							break;
						default:
							break;
					}
				} else {
					this.msg.error("服务器出错了!");
				}

				return throwErr;
			})
		);
	}
}