454 lines
11 KiB
TypeScript
454 lines
11 KiB
TypeScript
/*
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* SPDX-FileCopyrightText: syuilo and misskey-project
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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// NIRAX --- A lightweight router
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import { Component, onMounted, shallowRef, ShallowRef } from 'vue';
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import { EventEmitter } from 'eventemitter3';
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import { safeURIDecode } from '@/scripts/safe-uri-decode.js';
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interface RouteDefBase {
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path: string;
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query?: Record<string, string>;
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loginRequired?: boolean;
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name?: string;
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hash?: string;
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globalCacheKey?: string;
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children?: RouteDef[];
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}
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interface RouteDefWithComponent extends RouteDefBase {
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component: Component,
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}
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interface RouteDefWithRedirect extends RouteDefBase {
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redirect: string | ((props: Map<string, string | boolean>) => string);
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}
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export type RouteDef = RouteDefWithComponent | RouteDefWithRedirect;
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type ParsedPath = (string | {
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name: string;
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startsWith?: string;
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wildcard?: boolean;
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optional?: boolean;
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})[];
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export type RouterEvent = {
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change: (ctx: {
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beforePath: string;
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path: string;
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resolved: Resolved;
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key: string;
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}) => void;
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replace: (ctx: {
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path: string;
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key: string;
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}) => void;
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push: (ctx: {
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beforePath: string;
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path: string;
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route: RouteDef | null;
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props: Map<string, string> | null;
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key: string;
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}) => void;
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same: () => void;
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}
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export type Resolved = {
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route: RouteDef;
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props: Map<string, string | boolean>;
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child?: Resolved;
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redirected?: boolean;
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/** @internal */
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_parsedRoute: {
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fullPath: string;
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queryString: string | null;
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hash: string | null;
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};
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};
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function parsePath(path: string): ParsedPath {
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const res = [] as ParsedPath;
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path = path.substring(1);
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for (const part of path.split('/')) {
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if (part.includes(':')) {
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const prefix = part.substring(0, part.indexOf(':'));
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const placeholder = part.substring(part.indexOf(':') + 1);
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const wildcard = placeholder.includes('(*)');
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const optional = placeholder.endsWith('?');
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res.push({
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name: placeholder.replace('(*)', '').replace('?', ''),
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startsWith: prefix !== '' ? prefix : undefined,
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wildcard,
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optional,
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});
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} else if (part.length !== 0) {
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res.push(part);
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}
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}
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return res;
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}
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export interface IRouter extends EventEmitter<RouterEvent> {
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current: Resolved;
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currentRef: ShallowRef<Resolved>;
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currentRoute: ShallowRef<RouteDef>;
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navHook: ((path: string, flag?: any) => boolean) | null;
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/**
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* ルートの初期化（eventListenerの定義後に必ず呼び出すこと）
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*/
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init(): void;
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resolve(path: string): Resolved | null;
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getCurrentPath(): any;
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getCurrentKey(): string;
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push(path: string, flag?: any): void;
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replace(path: string, key?: string | null): void;
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/** @see EventEmitter */
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eventNames(): Array<EventEmitter.EventNames<RouterEvent>>;
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/** @see EventEmitter */
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listeners<T extends EventEmitter.EventNames<RouterEvent>>(
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event: T
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): Array<EventEmitter.EventListener<RouterEvent, T>>;
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/** @see EventEmitter */
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listenerCount(
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event: EventEmitter.EventNames<RouterEvent>
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): number;
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/** @see EventEmitter */
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emit<T extends EventEmitter.EventNames<RouterEvent>>(
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event: T,
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...args: EventEmitter.EventArgs<RouterEvent, T>
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): boolean;
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/** @see EventEmitter */
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on<T extends EventEmitter.EventNames<RouterEvent>>(
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event: T,
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fn: EventEmitter.EventListener<RouterEvent, T>,
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context?: any
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): this;
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/** @see EventEmitter */
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addListener<T extends EventEmitter.EventNames<RouterEvent>>(
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event: T,
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fn: EventEmitter.EventListener<RouterEvent, T>,
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context?: any
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): this;
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/** @see EventEmitter */
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once<T extends EventEmitter.EventNames<RouterEvent>>(
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event: T,
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fn: EventEmitter.EventListener<RouterEvent, T>,
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context?: any
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): this;
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/** @see EventEmitter */
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removeListener<T extends EventEmitter.EventNames<RouterEvent>>(
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event: T,
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fn?: EventEmitter.EventListener<RouterEvent, T>,
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context?: any,
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once?: boolean | undefined
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): this;
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/** @see EventEmitter */
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off<T extends EventEmitter.EventNames<RouterEvent>>(
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event: T,
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fn?: EventEmitter.EventListener<RouterEvent, T>,
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context?: any,
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once?: boolean | undefined
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): this;
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/** @see EventEmitter */
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removeAllListeners(
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event?: EventEmitter.EventNames<RouterEvent>
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): this;
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}
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export class Router extends EventEmitter<RouterEvent> implements IRouter {
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private routes: RouteDef[];
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public current: Resolved;
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public currentRef: ShallowRef<Resolved>;
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public currentRoute: ShallowRef<RouteDef>;
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private currentPath: string;
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private isLoggedIn: boolean;
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private notFoundPageComponent: Component;
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private currentKey = Date.now().toString();
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private redirectCount = 0;
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public navHook: ((path: string, flag?: any) => boolean) | null = null;
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constructor(routes: Router['routes'], currentPath: Router['currentPath'], isLoggedIn: boolean, notFoundPageComponent: Component) {
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super();
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this.routes = routes;
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this.current = this.resolve(currentPath)!;
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this.currentRef = shallowRef(this.current);
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this.currentRoute = shallowRef(this.current.route);
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this.currentPath = currentPath;
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this.isLoggedIn = isLoggedIn;
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this.notFoundPageComponent = notFoundPageComponent;
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}
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public init() {
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const res = this.navigate(this.currentPath, null, false);
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this.emit('replace', {
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path: res._parsedRoute.fullPath,
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key: this.currentKey,
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});
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}
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public resolve(path: string): Resolved | null {
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const fullPath = path;
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let queryString: string | null = null;
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let hash: string | null = null;
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if (path[0] === '/') path = path.substring(1);
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if (path.includes('#')) {
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hash = path.substring(path.indexOf('#') + 1);
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path = path.substring(0, path.indexOf('#'));
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}
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if (path.includes('?')) {
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queryString = path.substring(path.indexOf('?') + 1);
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path = path.substring(0, path.indexOf('?'));
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}
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const _parsedRoute = {
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fullPath,
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queryString,
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hash,
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};
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if (_DEV_) console.log('Routing: ', path, queryString);
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function check(routes: RouteDef[], _parts: string[]): Resolved | null {
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forEachRouteLoop:
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for (const route of routes) {
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let parts = [..._parts];
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const props = new Map<string, string>();
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pathMatchLoop:
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for (const p of parsePath(route.path)) {
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if (typeof p === 'string') {
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if (p === parts[0]) {
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parts.shift();
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} else {
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continue forEachRouteLoop;
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}
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} else {
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if (parts[0] == null && !p.optional) {
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continue forEachRouteLoop;
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}
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if (p.wildcard) {
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if (parts.length !== 0) {
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props.set(p.name, safeURIDecode(parts.join('/')));
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parts = [];
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}
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break pathMatchLoop;
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} else {
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if (p.startsWith) {
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if (parts[0] == null || !parts[0].startsWith(p.startsWith)) continue forEachRouteLoop;
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props.set(p.name, safeURIDecode(parts[0].substring(p.startsWith.length)));
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parts.shift();
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} else {
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if (parts[0]) {
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props.set(p.name, safeURIDecode(parts[0]));
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}
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parts.shift();
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}
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}
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}
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}
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if (parts.length === 0) {
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if (route.children) {
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const child = check(route.children, []);
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if (child) {
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return {
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route,
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props,
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child,
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_parsedRoute,
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};
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} else {
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continue forEachRouteLoop;
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}
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}
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if (route.hash != null && hash != null) {
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props.set(route.hash, safeURIDecode(hash));
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}
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if (route.query != null && queryString != null) {
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const queryObject = [...new URLSearchParams(queryString).entries()]
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.reduce((obj, entry) => ({ ...obj, [entry[0]]: entry[1] }), {});
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for (const q in route.query) {
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const as = route.query[q];
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if (queryObject[q]) {
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props.set(as, safeURIDecode(queryObject[q]));
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}
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}
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}
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return {
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route,
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props,
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_parsedRoute,
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};
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} else {
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if (route.children) {
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const child = check(route.children, parts);
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if (child) {
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return {
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route,
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props,
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child,
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_parsedRoute,
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};
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} else {
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continue forEachRouteLoop;
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}
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} else {
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continue forEachRouteLoop;
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}
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}
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}
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return null;
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}
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const _parts = path.split('/').filter(part => part.length !== 0);
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return check(this.routes, _parts);
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}
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private navigate(path: string, key: string | null | undefined, emitChange = true, _redirected = false): Resolved {
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const beforePath = this.currentPath;
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this.currentPath = path;
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const res = this.resolve(this.currentPath);
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if (res == null) {
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throw new Error('no route found for: ' + path);
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}
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if ('redirect' in res.route) {
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let redirectPath: string;
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if (typeof res.route.redirect === 'function') {
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redirectPath = res.route.redirect(res.props);
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} else {
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redirectPath = res.route.redirect + (res._parsedRoute.queryString ? '?' + res._parsedRoute.queryString : '') + (res._parsedRoute.hash ? '#' + res._parsedRoute.hash : '');
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}
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if (_DEV_) console.log('Redirecting to: ', redirectPath);
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if (_redirected && this.redirectCount++ > 10) {
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throw new Error('redirect loop detected');
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}
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return this.navigate(redirectPath, null, emitChange, true);
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}
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if (res.route.loginRequired && !this.isLoggedIn) {
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res.route.component = this.notFoundPageComponent;
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res.props.set('showLoginPopup', true);
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}
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const isSamePath = beforePath === path;
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if (isSamePath && key == null) key = this.currentKey;
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this.current = res;
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this.currentRef.value = res;
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this.currentRoute.value = res.route;
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this.currentKey = res.route.globalCacheKey ?? key ?? path;
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if (emitChange) {
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this.emit('change', {
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beforePath,
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path,
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resolved: res,
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key: this.currentKey,
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});
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}
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this.redirectCount = 0;
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return {
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...res,
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redirected: _redirected,
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};
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}
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public getCurrentPath() {
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return this.currentPath;
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}
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public getCurrentKey() {
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return this.currentKey;
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}
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public push(path: string, flag?: any) {
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const beforePath = this.currentPath;
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if (path === beforePath) {
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this.emit('same');
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return;
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}
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if (this.navHook) {
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const cancel = this.navHook(path, flag);
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if (cancel) return;
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}
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const res = this.navigate(path, null);
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this.emit('push', {
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beforePath,
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path: res._parsedRoute.fullPath,
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route: res.route,
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props: res.props,
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key: this.currentKey,
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});
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}
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public replace(path: string, key?: string | null) {
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const res = this.navigate(path, key);
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this.emit('replace', {
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path: res._parsedRoute.fullPath,
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key: this.currentKey,
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});
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}
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}
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export function useScrollPositionManager(getScrollContainer: () => HTMLElement | null, router: IRouter) {
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const scrollPosStore = new Map<string, number>();
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onMounted(() => {
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const scrollContainer = getScrollContainer();
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if (scrollContainer == null) return;
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scrollContainer.addEventListener('scroll', () => {
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scrollPosStore.set(router.getCurrentKey(), scrollContainer.scrollTop);
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}, { passive: true });
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router.addListener('change', ctx => {
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const scrollPos = scrollPosStore.get(ctx.key) ?? 0;
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scrollContainer.scroll({ top: scrollPos, behavior: 'instant' });
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if (scrollPos !== 0) {
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window.setTimeout(() => { // 遷移直後はタイミングによってはコンポーネントが復元し切ってない可能性も考えられるため少し時間を空けて再度スクロール
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scrollContainer.scroll({ top: scrollPos, behavior: 'instant' });
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}, 100);
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}
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});
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router.addListener('same', () => {
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scrollContainer.scroll({ top: 0, behavior: 'smooth' });
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});
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});
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}
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