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import { ComponentType, FC, ReactNode, createContext, useContext, useEffect, useState } from 'react';
import type { RouteProps } from 'react-router';
export interface RouterEntry {
props: Omit<RouteProps, 'path' | 'children'>;
component: ComponentType;
}
export type RoutePatch = (route: RouteProps) => RouteProps;
interface PublicDeckyRouterState {
routes: Map<string, RouterEntry>;
routePatches: Map<string, Set<RoutePatch>>;
}
export class DeckyRouterState {
private _routes = new Map<string, RouterEntry>();
private _routePatches = new Map<string, Set<RoutePatch>>();
public eventBus = new EventTarget();
publicState(): PublicDeckyRouterState {
return { routes: this._routes, routePatches: this._routePatches };
}
addRoute(path: string, component: RouterEntry['component'], props: RouterEntry['props'] = {}) {
this._routes.set(path, { props, component });
this.notifyUpdate();
}
addPatch(path: string, patch: RoutePatch) {
let patchList = this._routePatches.get(path);
if (!patchList) {
patchList = new Set();
this._routePatches.set(path, patchList);
}
patchList.add(patch);
this.notifyUpdate();
return patch;
}
removePatch(path: string, patch: RoutePatch) {
const patchList = this._routePatches.get(path);
patchList?.delete(patch);
if (patchList?.size == 0) {
this._routePatches.delete(path);
}
this.notifyUpdate();
}
removeRoute(path: string) {
this._routes.delete(path);
this.notifyUpdate();
}
private notifyUpdate() {
this.eventBus.dispatchEvent(new Event('update'));
}
}
interface DeckyRouterStateContext extends PublicDeckyRouterState {
addRoute(path: string, component: RouterEntry['component'], props: RouterEntry['props']): void;
addPatch(path: string, patch: RoutePatch): RoutePatch;
removePatch(path: string, patch: RoutePatch): void;
removeRoute(path: string): void;
}
const DeckyRouterStateContext = createContext<DeckyRouterStateContext>(null as any);
export const useDeckyRouterState = () => useContext(DeckyRouterStateContext);
interface Props {
deckyRouterState: DeckyRouterState;
children: ReactNode;
}
export const DeckyRouterStateContextProvider: FC<Props> = ({ children, deckyRouterState }) => {
const [publicDeckyRouterState, setPublicDeckyRouterState] = useState<PublicDeckyRouterState>({
...deckyRouterState.publicState(),
});
useEffect(() => {
function onUpdate() {
setPublicDeckyRouterState({ ...deckyRouterState.publicState() });
}
deckyRouterState.eventBus.addEventListener('update', onUpdate);
return () => deckyRouterState.eventBus.removeEventListener('update', onUpdate);
}, []);
const addRoute = deckyRouterState.addRoute.bind(deckyRouterState);
const addPatch = deckyRouterState.addPatch.bind(deckyRouterState);
const removePatch = deckyRouterState.removePatch.bind(deckyRouterState);
const removeRoute = deckyRouterState.removeRoute.bind(deckyRouterState);
return (
<DeckyRouterStateContext.Provider
value={{ ...publicDeckyRouterState, addRoute, addPatch, removePatch, removeRoute }}
>
{children}
</DeckyRouterStateContext.Provider>
);
};
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