132 lines
3.5 KiB
TypeScript
132 lines
3.5 KiB
TypeScript
"use client";
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import { useCallback, useEffect, useRef } from "react";
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import {
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type CatalogSelection,
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readCatalogSelection,
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writeCatalogSelection,
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} from "./catalog-selection-url";
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export function requestCatalogNavigation() {
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return window.dispatchEvent(
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new Event("catalog:before-navigation", { cancelable: true }),
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);
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}
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/** Selection history stays local: changing category does not reload the server page. */
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export function useCatalogNavigation({
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enabled,
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restore,
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mayLeave,
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}: {
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enabled: boolean;
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restore: (selection: CatalogSelection) => void;
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mayLeave: () => boolean;
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}) {
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const current = useRef({ restore, mayLeave });
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useEffect(() => {
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current.current = { restore, mayLeave };
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}, [restore, mayLeave]);
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const previousUrl = useRef("");
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const position = useRef(0);
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const restoringHistory = useRef(false);
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useEffect(() => {
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if (!enabled) return;
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previousUrl.current = window.location.href;
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position.current = window.history.state?.catalogSelectionPosition ?? 0;
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window.history.replaceState(
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{ ...window.history.state, catalogSelectionPosition: position.current },
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"",
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);
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current.current.restore(
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readCatalogSelection(new URL(window.location.href)),
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);
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const onPopState = () => {
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if (restoringHistory.current) {
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restoringHistory.current = false;
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return;
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}
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const targetPosition = window.history.state?.catalogSelectionPosition;
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if (!current.current.mayLeave()) {
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if (
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typeof targetPosition === "number" &&
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targetPosition !== position.current
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) {
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restoringHistory.current = true;
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window.history.go(position.current - targetPosition);
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return;
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}
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window.history.replaceState(
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window.history.state,
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"",
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previousUrl.current,
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);
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return;
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}
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position.current =
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typeof targetPosition === "number" ? targetPosition : position.current;
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previousUrl.current = window.location.href;
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current.current.restore(
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readCatalogSelection(new URL(window.location.href)),
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);
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};
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const onLink = (event: MouseEvent) => {
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if (
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event.defaultPrevented ||
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event.button !== 0 ||
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event.ctrlKey ||
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event.metaKey ||
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event.shiftKey ||
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event.altKey
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)
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return;
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const link = (event.target as Element).closest?.(
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"a[href]",
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) as HTMLAnchorElement | null;
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if (
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!link ||
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link.target === "_blank" ||
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link.hasAttribute("download") ||
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link.href === window.location.href
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)
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return;
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if (!current.current.mayLeave()) {
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event.preventDefault();
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event.stopPropagation();
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}
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};
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const onNavigation = (event: Event) => {
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if (!current.current.mayLeave()) event.preventDefault();
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};
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window.addEventListener("catalog:before-navigation", onNavigation);
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window.addEventListener("popstate", onPopState);
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document.addEventListener("click", onLink, true);
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return () => {
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window.removeEventListener("catalog:before-navigation", onNavigation);
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window.removeEventListener("popstate", onPopState);
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document.removeEventListener("click", onLink, true);
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};
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}, [enabled]);
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return useCallback(
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(selection: CatalogSelection) => {
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if (!enabled) return;
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const url = writeCatalogSelection(
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new URL(window.location.href),
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selection,
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);
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if (url.href !== window.location.href) {
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position.current += 1;
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window.history.pushState(
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{
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...window.history.state,
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catalogSelectionPosition: position.current,
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},
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"",
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url,
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);
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}
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previousUrl.current = url.href;
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},
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[enabled],
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);
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}
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