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import { FC, createContext, useContext, useEffect, useState } from 'react';
import { Plugin } from '../plugin';
interface PublicDeckyState {
plugins: Plugin[];
activePlugin: Plugin | null;
}
export class DeckyState {
private _plugins: Plugin[] = [];
private _activePlugin: Plugin | null = null;
public eventBus = new EventTarget();
publicState(): PublicDeckyState {
return { plugins: this._plugins, activePlugin: this._activePlugin };
}
setPlugins(plugins: Plugin[]) {
this._plugins = plugins;
this.notifyUpdate();
}
setActivePlugin(name: string) {
this._activePlugin = this._plugins.find((plugin) => plugin.name === name) ?? null;
this.notifyUpdate();
}
closeActivePlugin() {
this._activePlugin = null;
this.notifyUpdate();
}
private notifyUpdate() {
this.eventBus.dispatchEvent(new Event('update'));
}
}
interface DeckyStateContext extends PublicDeckyState {
setActivePlugin(name: string): void;
closeActivePlugin(): void;
}
const DeckyStateContext = createContext<DeckyStateContext>(null as any);
export const useDeckyState = () => useContext(DeckyStateContext);
interface Props {
deckyState: DeckyState;
}
export const DeckyStateContextProvider: FC<Props> = ({ children, deckyState }) => {
const [publicDeckyState, setPublicDeckyState] = useState<PublicDeckyState>({ ...deckyState.publicState() });
useEffect(() => {
function onUpdate() {
setPublicDeckyState({ ...deckyState.publicState() });
}
deckyState.eventBus.addEventListener('update', onUpdate);
return () => deckyState.eventBus.removeEventListener('update', onUpdate);
}, []);
const setActivePlugin = (name: string) => deckyState.setActivePlugin(name);
const closeActivePlugin = () => deckyState.closeActivePlugin();
return (
<DeckyStateContext.Provider value={{ ...publicDeckyState, setActivePlugin, closeActivePlugin }}>
{children}
</DeckyStateContext.Provider>
);
};
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