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KnobStore.ts
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KnobStore.ts
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import { Knob } from './type-defs';
type Callback = () => any;
export type KnobStoreKnob = Knob & {
name: string;
label: string;
used?: boolean;
defaultValue?: any;
hideLabel?: boolean;
callback?: () => any;
};
const callArg = (fn: Callback) => fn();
const callAll = (fns: Callback[]) => fns.forEach(callArg);
export default class KnobStore {
store: Record<string, KnobStoreKnob> = {};
callbacks: Callback[] = [];
timer: number | undefined;
has(key: string) {
return this.store[key] !== undefined;
}
set(key: string, value: KnobStoreKnob) {
this.store[key] = {
...value,
used: true,
groupId: value.groupId,
};
// debounce the execution of the callbacks for 50 milliseconds
if (this.timer) {
clearTimeout(this.timer);
}
this.timer = setTimeout(callAll, 50, this.callbacks) as unknown as number;
}
update(key: string, options: Partial<KnobStoreKnob>) {
this.store[key] = {
...this.store[key],
...options,
} as KnobStoreKnob;
}
get(key: string) {
const knob = this.store[key];
if (knob) {
knob.used = true;
}
return knob;
}
getAll() {
return this.store;
}
reset() {
this.store = {};
}
markAllUnused() {
Object.keys(this.store).forEach((knobName) => {
this.store[knobName].used = false;
});
}
subscribe(cb: Callback) {
this.callbacks.push(cb);
}
unsubscribe(cb: Callback) {
const index = this.callbacks.indexOf(cb);
this.callbacks.splice(index, 1);
}
}