Created
January 27, 2022 11:34
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RouterLink with support for external links
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| /* eslint-disable @angular-eslint/directive-selector */ | |
| import { isPlatformBrowser, LocationStrategy } from '@angular/common'; | |
| import { | |
| Directive, | |
| HostBinding, | |
| HostListener, | |
| Inject, | |
| Input, | |
| OnChanges, | |
| OnDestroy, | |
| PLATFORM_ID, | |
| } from '@angular/core'; | |
| import { | |
| ActivatedRoute, | |
| Event, | |
| NavigationEnd, | |
| Params, | |
| QueryParamsHandling, | |
| Router, | |
| UrlTree, | |
| } from '@angular/router'; | |
| import { Subject, Subscription } from 'rxjs'; | |
| @Directive({ selector: 'a[myRouterLink],area[myRouterLink]' }) | |
| export class MyRouterLinkWithHrefDirective implements OnChanges, OnDestroy { | |
| @HostBinding('attr.target') @Input() target!: string; | |
| @Input() queryParams?: Params | null; | |
| @Input() fragment?: string; | |
| @Input() queryParamsHandling?: QueryParamsHandling | null; | |
| @Input() preserveFragment!: boolean; | |
| @Input() skipLocationChange!: boolean; | |
| @Input() replaceUrl!: boolean; | |
| @Input() state?: { [k: string]: any }; | |
| @Input() relativeTo?: ActivatedRoute | null; | |
| private commands: any[] | null = null; | |
| private subscription: Subscription; | |
| @HostBinding('attr.href') href: string | null = null; | |
| /** @internal */ | |
| onChanges = new Subject<MyRouterLinkWithHrefDirective>(); | |
| constructor( | |
| private router: Router, | |
| private route: ActivatedRoute, | |
| private locationStrategy: LocationStrategy, | |
| @Inject(PLATFORM_ID) private platformId: string, | |
| ) { | |
| this.subscription = router.events.subscribe((s: Event) => { | |
| if (s instanceof NavigationEnd) { | |
| this.updateTargetUrlAndHref(); | |
| } | |
| }); | |
| } | |
| @Input() | |
| set myRouterLink(commands: any[] | string | null | undefined) { | |
| if (commands != null) { | |
| this.commands = Array.isArray(commands) ? commands : [commands]; | |
| } else { | |
| this.commands = null; | |
| } | |
| } | |
| ngOnChanges(): any { | |
| this.updateTargetUrlAndHref(); | |
| this.onChanges.next(this); | |
| } | |
| ngOnDestroy(): any { | |
| this.subscription.unsubscribe(); | |
| } | |
| @HostListener('click', [ | |
| '$event.button', | |
| '$event.ctrlKey', | |
| '$event.shiftKey', | |
| '$event.altKey', | |
| '$event.metaKey', | |
| ]) | |
| onClick( | |
| button: number, | |
| ctrlKey: boolean, | |
| shiftKey: boolean, | |
| altKey: boolean, | |
| metaKey: boolean, | |
| ): boolean { | |
| if (button !== 0 || ctrlKey || shiftKey || altKey || metaKey) { | |
| return true; | |
| } | |
| if ( | |
| (typeof this.target === 'string' && this.target != '_self') || | |
| this.urlTree === null | |
| ) { | |
| return true; | |
| } | |
| if ( | |
| isPlatformBrowser(this.platformId) && | |
| this.isExternalLink() && | |
| this.href | |
| ) { | |
| window.open(this.href, this.target); | |
| return false; | |
| } | |
| const extras = { | |
| skipLocationChange: attrBoolValue(this.skipLocationChange), | |
| replaceUrl: attrBoolValue(this.replaceUrl), | |
| state: this.state, | |
| }; | |
| this.router.navigateByUrl(this.urlTree, extras); | |
| return false; | |
| } | |
| private updateTargetUrlAndHref(): void { | |
| if (this.isExternalLink()) { | |
| this.href = this.commands ? this.commands.join('') : null; | |
| return; | |
| } | |
| this.href = | |
| this.urlTree !== null | |
| ? this.locationStrategy.prepareExternalUrl( | |
| this.router.serializeUrl(this.urlTree), | |
| ) | |
| : null; | |
| } | |
| private isExternalLink(): boolean { | |
| if (this.commands === null || !isPlatformBrowser(this.platformId)) | |
| return false; | |
| try { | |
| const url = new URL(this.commands.join('')); | |
| console.log(url.toString().replace(url.origin, '')); | |
| if (url.origin === location.origin) { | |
| this.commands = [url.toString().replace(url.origin, '')]; | |
| return false; | |
| } | |
| return true; | |
| } catch { | |
| return false; | |
| } | |
| } | |
| get urlTree(): UrlTree | null { | |
| if (this.commands === null) { | |
| return null; | |
| } | |
| return this.router.createUrlTree(this.commands, { | |
| relativeTo: this.relativeTo !== undefined ? this.relativeTo : this.route, | |
| queryParams: this.queryParams, | |
| fragment: this.fragment, | |
| queryParamsHandling: this.queryParamsHandling, | |
| preserveFragment: attrBoolValue(this.preserveFragment), | |
| }); | |
| } | |
| } | |
| function attrBoolValue(s: any): boolean { | |
| return s === '' || !!s; | |
| } |
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