client/src/app/+search/shared/abstract-lazy-load.resolver.ts

   1 import { Observable } from 'rxjs'
   2 import { map } from 'rxjs/operators'
   3 import { ActivatedRouteSnapshot, Resolve, Router } from '@angular/router'
   4 import { ResultList } from '@shared/models'
   5
   6 export abstract class AbstractLazyLoadResolver <T> implements Resolve<any> {
   7   protected router: Router
   8
   9   resolve (route: ActivatedRouteSnapshot) {
  10     const url = route.params.url
  11
  12     if (!url) {
  13       console.error('Could not find url param.', { params: route.params })
  14       return this.router.navigateByUrl('/404')
  15     }
  16
  17     return this.finder(url)
  18       .pipe(
  19         map(result => {
  20           if (result.data.length !== 1) {
  21             console.error('Cannot find result for this URL')
  22             return this.router.navigateByUrl('/404')
  23           }
  24
  25           const redirectUrl = this.buildUrl(result.data[0])
  26
  27           return this.router.navigateByUrl(redirectUrl)
  28         })
  29       )
  30   }
  31
  32   protected abstract finder (url: string): Observable<ResultList<T>>
  33   protected abstract buildUrl (e: T): string
  34 }