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/**
* @license
* Copyright 2024 Google Inc.
* SPDX-License-Identifier: Apache-2.0
*/
import {EventEmitter} from '../../common/EventEmitter.js';
import {inertIfDisposed} from '../../util/decorators.js';
import {Deferred} from '../../util/Deferred.js';
import {DisposableStack, disposeSymbol} from '../../util/disposable.js';
import type {BrowsingContext} from './BrowsingContext.js';
import type {Request} from './Request.js';
/**
* @internal
*/
export interface NavigationInfo {
url: string;
timestamp: Date;
}
/**
* @internal
*/
export class Navigation extends EventEmitter<{
/** Emitted when navigation has a request associated with it. */
request: Request;
/** Emitted when fragment navigation occurred. */
fragment: NavigationInfo;
/** Emitted when navigation failed. */
failed: NavigationInfo;
/** Emitted when navigation was aborted. */
aborted: NavigationInfo;
}> {
static from(context: BrowsingContext): Navigation {
const navigation = new Navigation(context);
navigation.#initialize();
return navigation;
}
// keep-sorted start
#request: Request | undefined;
readonly #browsingContext: BrowsingContext;
readonly #disposables = new DisposableStack();
readonly #id = new Deferred<string>();
// keep-sorted end
private constructor(context: BrowsingContext) {
super();
// keep-sorted start
this.#browsingContext = context;
// keep-sorted end
}
#initialize() {
const browsingContextEmitter = this.#disposables.use(
new EventEmitter(this.#browsingContext)
);
browsingContextEmitter.once('closed', () => {
this.emit('failed', {
url: this.#browsingContext.url,
timestamp: new Date(),
});
this.dispose();
});
this.#browsingContext.on('request', ({request}) => {
if (request.navigation === this.#id.value()) {
this.#request = request;
this.emit('request', request);
}
});
const sessionEmitter = this.#disposables.use(
new EventEmitter(this.#session)
);
// To get the navigation ID if any.
for (const eventName of [
'browsingContext.domContentLoaded',
'browsingContext.load',
] as const) {
sessionEmitter.on(eventName, info => {
if (info.context !== this.#browsingContext.id) {
return;
}
if (!info.navigation) {
return;
}
if (!this.#id.resolved()) {
this.#id.resolve(info.navigation);
}
});
}
for (const [eventName, event] of [
['browsingContext.fragmentNavigated', 'fragment'],
['browsingContext.navigationFailed', 'failed'],
['browsingContext.navigationAborted', 'aborted'],
] as const) {
sessionEmitter.on(eventName, info => {
if (info.context !== this.#browsingContext.id) {
return;
}
if (!info.navigation) {
return;
}
if (!this.#id.resolved()) {
this.#id.resolve(info.navigation);
}
if (this.#id.value() !== info.navigation) {
return;
}
this.emit(event, {
url: info.url,
timestamp: new Date(info.timestamp),
});
this.dispose();
});
}
}
// keep-sorted start block=yes
get #session() {
return this.#browsingContext.userContext.browser.session;
}
get disposed(): boolean {
return this.#disposables.disposed;
}
get request(): Request | undefined {
return this.#request;
}
// keep-sorted end
@inertIfDisposed
private dispose(): void {
this[disposeSymbol]();
}
[disposeSymbol](): void {
this.#disposables.dispose();
super[disposeSymbol]();
}
}
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