RocketChat/Rocket.Chat

import debounce from 'lodash.debounce';
import mem from 'mem';

interface IMemoizeDebouncedFunction<F extends (...args: any[]) => any> {
    (...args: Parameters<F>): void;
    flush: (...args: Parameters<F>) => void;
}

// Debounce `func` based on passed parameters
// ref: https://github.com/lodash/lodash/issues/2403#issuecomment-816137402
export function memoizeDebounce<F extends (...args: any[]) => any>(func: F, wait = 0, options: any = {}): IMemoizeDebouncedFunction<F> {
    const debounceMemo = mem(
        // eslint-disable-next-line @typescript-eslint/no-unused-vars
        (..._args: Parameters<F>) => debounce(func, wait, options),
    );

    function wrappedFunction(this: IMemoizeDebouncedFunction<F>, ...args: Parameters<F>): ReturnType<F> | undefined {
        return debounceMemo(...args)(...args);
    }

    wrappedFunction.flush = (...args: Parameters<F>): void => {
        debounceMemo(...args).flush();
    };

    return wrappedFunction as unknown as IMemoizeDebouncedFunction<F>;
}