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237 lines
5.7 KiB
TypeScript
237 lines
5.7 KiB
TypeScript
// NIRAX --- A lightweight router
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import { EventEmitter } from 'eventemitter3';
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import { Component, shallowRef, ShallowRef } from 'vue';
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import { pleaseLogin } from '@/scripts/please-login';
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import { safeURIDecode } from '@/scripts/safe-uri-decode';
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type RouteDef = {
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path: string;
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component: Component;
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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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};
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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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function parsePath(path: string): ParsedPath {
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const res = [] as ParsedPath;
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for (const part of path.substring(1).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 class Router extends EventEmitter<{
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change: (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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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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private routes: RouteDef[];
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private currentPath: string;
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private currentComponent: Component | null = null;
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private currentProps: Map<string, string> | null = null;
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private currentKey = Date.now().toString();
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public currentRoute: ShallowRef<RouteDef | null> = shallowRef(null);
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public navHook: ((path: string) => boolean) | null = null;
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constructor(routes: Router['routes'], currentPath: Router['currentPath']) {
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super();
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this.routes = routes;
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this.currentPath = currentPath;
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this.navigate(currentPath, null, true);
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}
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public resolve(_path: string): { route: RouteDef; props: Map<string, string>; } | null {
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let queryString: string | null = null;
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let hash: string | null = null;
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let path: string = _path;
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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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if (_DEV_) console.log('Routing: ', path, queryString);
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const _parts = path.split('/').filter(part => part.length !== 0);
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forEachRouteLoop:
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for (const route of this.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) continue forEachRouteLoop;
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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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};
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}
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return null;
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}
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private navigate(path: string, key: string | null | undefined, initial = false): void {
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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 (res.route.loginRequired) {
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pleaseLogin('/');
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}
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const isSamePath = beforePath === path;
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this.currentComponent = res.route.component;
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this.currentProps = res.props;
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this.currentRoute.value = res.route;
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this.currentKey = this.currentRoute.value.globalCacheKey ?? key ?? (isSamePath ? this.currentKey : null) ?? Date.now().toString();
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if (!initial) {
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this.emit('change', {
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beforePath,
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path,
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route: this.currentRoute.value,
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props: this.currentProps,
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key: this.currentKey,
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});
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}
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}
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public getCurrentComponent(): Component | null {
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return this.currentComponent;
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}
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public getCurrentProps(): Map<string, string> | null {
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return this.currentProps;
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}
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public getCurrentPath(): string {
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return this.currentPath;
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}
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public getCurrentKey(): string {
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return this.currentKey;
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}
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public push(path: string): void {
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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);
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if (cancel) return;
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}
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this.navigate(path, null);
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this.emit('push', {
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beforePath,
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path,
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route: this.currentRoute.value,
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props: this.currentProps,
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key: this.currentKey,
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});
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}
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public change(path: string, key?: string | null): void {
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this.navigate(path, key);
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}
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}
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