hy-push-state/lib/fetch.js

Turn static web sites into dynamic web apps

import { of, zip } from "rxjs";
import { catchError, map, take, switchMap } from "rxjs/operators";
import { fetchRx } from "./common";
;
export class FetchManager {
    constructor(parent) {
        this.parent = parent;
    }
    get animPromise() {
        return this.parent.animPromise;
    }
    fetchPage(context) {
        return fetchRx(context.url.href, {
            method: "GET",
            mode: 'cors',
            headers: { Accept: "text/html" },
        })
            .pipe(switchMap(response => response.text()), map(response => ({ ...context, response })), catchError(error => {
            console.log(error);
            return of({ ...context, error, response: null });
        }));
    }
    selectPrefetch({ href }, latestPrefetch, prefetch$) {
        return href === latestPrefetch.url.href && latestPrefetch.error == null
            ? of(latestPrefetch)
            : prefetch$.pipe(take(1));
    }
    // Returns an observable that emits exactly one notice, which contains the response.
    // It will not emit until an (optional) page transition animation completes.
    getResponse(prefetch$, context, latestPrefetch) {
        return zip(this.selectPrefetch(context.url, latestPrefetch, prefetch$), this.animPromise, prefetch => ({ ...prefetch, ...context }));
    }
}
;