@tunframework/tun/lib/esm/TunComposable.js

tun framework for node with typescript

export function compose(composables) {
    return async (ctx, next) => {
        let index = -1;
        return (function dispatch(i) {
            if (i <= index) {
                return Promise.reject(new Error(`error: attempt to call composables[${i}], but current is composables[${index}], they migint called, or was given incorrect composables[${i}].`));
            }
            index = i;
            let fn = i === composables.length ? next : composables[i];
            if (!fn)
                return Promise.resolve();
            try {
                // make `next` point to next composable
                return Promise.resolve(fn(ctx, dispatch.bind(null, i + 1)));
            }
            catch (e) {
                return Promise.reject(e);
            }
        })(0);
    };
}