call-hooks/dist/index.js

Function for adding before/after/call/arguments/result hooks to another function.

/* IMPORT */
/* MAIN */
const callHooks = (fn, hooks) => {
    /* HELPERS */
    const onCall = (args, thisArg) => {
        if (hooks.call)
            return hooks.call.call(thisArg, args);
        return fn.apply(thisArg, args);
    };
    const onResult = (args, result) => {
        result = hooks.result ? hooks.result(args, result) : result;
        if (hooks.after)
            hooks.after(args, result);
        return result;
    };
    const onError = (args, error) => {
        if (hooks.after)
            hooks.after(args, error);
        throw error;
    };
    /* WRAPPER */
    return function callHooksWrapper() {
        const argsv = Array.from(arguments);
        const args = hooks.args ? hooks.args(argsv) : argsv;
        if (hooks.before)
            hooks.before(args);
        if (!hooks.after && !hooks.result)
            return onCall(args, this);
        try {
            const result = onCall(args, this);
            if (result instanceof Promise) {
                const onResolve = (result) => onResult(args, result);
                const onReject = (error) => onError(args, error);
                return result.then(onResolve, onReject);
            }
            else {
                return onResult(args, result);
            }
        }
        catch (error) {
            onError(args, error);
        }
    }; //TSC
};
/* EXPORT */
export default callHooks;