import {Injectable} from '@angular/core';
import {CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot, UrlTree} from '@angular/router';
import {Observable} from 'rxjs';
import {User} from '../../class/User';

@Injectable({
    providedIn: 'root'
})
export class AuthGuard implements CanActivate {

    constructor() {
    }

    userInfo: User;

    canActivate(
        next: ActivatedRouteSnapshot,
        state: RouterStateSnapshot): Observable<boolean | UrlTree> | Promise<boolean | UrlTree> | boolean | UrlTree {
        const path = state.url.indexOf('?') > 0 ? state.url.substr(0, state.url.indexOf('?')) : state.url;
        switch (path) {
            case '/admin/article':
            case '/admin/category':
            case '/admin/link':
            case '/admin/tag':
            case '/admin/update':
            case '/admin/user':
            case '/admin/visitor':
                if (!this.userInfo || this.userInfo.role !== 'admin') return false;
        }
        return true;
    }

}