angular-demo/node_modules/@angular/router/fesm2022/upgrade.mjs

/**
 * @license Angular v19.2.4
 * (c) 2010-2025 Google LLC. https://angular.io/
 * License: MIT
 */

import { Location } from '@angular/common';
import { APP_BOOTSTRAP_LISTENER } from '@angular/core';
import { Router } from '@angular/router';
import { UpgradeModule } from '@angular/upgrade/static';

/**
 * Creates an initializer that sets up `ngRoute` integration
 * along with setting up the Angular router.
 *
 * @usageNotes
 *
 * <code-example language="typescript">
 * @NgModule({
 *  imports: [
 *   RouterModule.forRoot(SOME_ROUTES),
 *   UpgradeModule
 * ],
 * providers: [
 *   RouterUpgradeInitializer
 * ]
 * })
 * export class AppModule {
 *   ngDoBootstrap() {}
 * }
 * </code-example>
 *
 * @publicApi
 */
const RouterUpgradeInitializer = {
    provide: APP_BOOTSTRAP_LISTENER,
    multi: true,
    useFactory: locationSyncBootstrapListener,
    deps: [UpgradeModule],
};
/**
 * @internal
 */
function locationSyncBootstrapListener(ngUpgrade) {
    return () => {
        setUpLocationSync(ngUpgrade);
    };
}
/**
 * Sets up a location change listener to trigger `history.pushState`.
 * Works around the problem that `onPopState` does not trigger `history.pushState`.
 * Must be called *after* calling `UpgradeModule.bootstrap`.
 *
 * @param ngUpgrade The upgrade NgModule.
 * @param urlType The location strategy.
 * @see {@link /api/common/HashLocationStrategy HashLocationStrategy}
 * @see {@link /api/common/PathLocationStrategy PathLocationStrategy}
 *
 * @publicApi
 */
function setUpLocationSync(ngUpgrade, urlType = 'path') {
    if (!ngUpgrade.$injector) {
        throw new Error(`
        RouterUpgradeInitializer can be used only after UpgradeModule.bootstrap has been called.
        Remove RouterUpgradeInitializer and call setUpLocationSync after UpgradeModule.bootstrap.
      `);
    }
    const router = ngUpgrade.injector.get(Router);
    const location = ngUpgrade.injector.get(Location);
    ngUpgrade.$injector
        .get('$rootScope')
        .$on('$locationChangeStart', (event, newUrl, oldUrl, newState, oldState) => {
        // Navigations coming from Angular router have a navigationId state
        // property. Don't trigger Angular router navigation again if it is
        // caused by a URL change from the current Angular router
        // navigation.
        const currentNavigationId = router.getCurrentNavigation()?.id;
        const newStateNavigationId = newState?.navigationId;
        if (newStateNavigationId !== undefined && newStateNavigationId === currentNavigationId) {
            return;
        }
        let url;
        if (urlType === 'path') {
            url = resolveUrl(newUrl);
        }
        else if (urlType === 'hash') {
            // Remove the first hash from the URL
            const hashIdx = newUrl.indexOf('#');
            url = resolveUrl(newUrl.substring(0, hashIdx) + newUrl.substring(hashIdx + 1));
        }
        else {
            throw 'Invalid URLType passed to setUpLocationSync: ' + urlType;
        }
        const path = location.normalize(url.pathname);
        router.navigateByUrl(path + url.search + url.hash);
    });
}
/**
 * Normalizes and parses a URL.
 *
 * - Normalizing means that a relative URL will be resolved into an absolute URL in the context of
 *   the application document.
 * - Parsing means that the anchor's `protocol`, `hostname`, `port`, `pathname` and related
 *   properties are all populated to reflect the normalized URL.
 *
 * While this approach has wide compatibility, it doesn't work as expected on IE. On IE, normalizing
 * happens similar to other browsers, but the parsed components will not be set. (E.g. if you assign
 * `a.href = 'foo'`, then `a.protocol`, `a.host`, etc. will not be correctly updated.)
 * We work around that by performing the parsing in a 2nd step by taking a previously normalized URL
 * and assigning it again. This correctly populates all properties.
 *
 * See
 * https://github.com/angular/angular.js/blob/2c7400e7d07b0f6cec1817dab40b9250ce8ebce6/src/ng/urlUtils.js#L26-L33
 * for more info.
 */
let anchor;
function resolveUrl(url) {
    anchor ??= document.createElement('a');
    anchor.setAttribute('href', url);
    anchor.setAttribute('href', anchor.href);
    return {
        // IE does not start `pathname` with `/` like other browsers.
        pathname: `/${anchor.pathname.replace(/^\//, '')}`,
        search: anchor.search,
        hash: anchor.hash,
    };
}

export { RouterUpgradeInitializer, locationSyncBootstrapListener, setUpLocationSync };
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