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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | 1x 1x 1x 1x 1x 1x 1x 9x 9x 1x 8x 8x 4x 4x 3x 1x 2x 1x | import { PictureService } from '../../../services/pictures/picture.service';
import { HttpErrorResponse } from '@angular/common/http';
import { inject } from '@angular/core';
import { ActivatedRouteSnapshot, ResolveFn } from '@angular/router';
import { Picture } from '@drevo-web/shared';
import { Observable, of } from 'rxjs';
import { catchError } from 'rxjs/operators';
const NOT_FOUND_STATUS = 404;
export type PictureResolveResult = Picture | 'not-found' | 'load-error';
/**
* Pure function for resolving picture data from route params.
* Extracted for testability without injection context.
*/
export function resolvePicture(
pictureService: PictureService,
route: ActivatedRouteSnapshot,
): Observable<PictureResolveResult> {
const idParam = route.paramMap.get('id');
if (!idParam) {
return of('not-found' as const);
}
const id = Number(idParam);
if (isNaN(id) || id <= 0 || !Number.isInteger(id)) {
return of('not-found' as const);
}
return pictureService.getPicture(id).pipe(
catchError((error: unknown) => {
if (error instanceof HttpErrorResponse && error.status === NOT_FOUND_STATUS) {
return of('not-found' as const);
}
return of('load-error' as const);
}),
);
}
export const pictureResolver: ResolveFn<PictureResolveResult> = route => resolvePicture(inject(PictureService), route);
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