tuktakjs is a collection utility functions

The word tuktak means tiny things that resembles the meaning of the library.

applyMiddleware

You can pass many middleware as arguments to the function. Every middleware in the chain will receive your request arguments or graphql resolver arguments and a next callback function as the last argument. You may call it to forward the execution to the next middleware or to your actual resolver or controller function.

Example:

1. graphql resolver level middleware

import { applyMiddleware } from 'tuktakjs';

const resolvers = {
    site: applyMiddleware(
        authMiddleware,
        permissionMiddleware,
        async (root, args, ctx, info) => {
            // your business logic
        }
    ),
    // .... 
};

function authMiddleware(root, args, ctx, info, next) {
    // your middleware logic
    // call next() to forward it to the next middleware or to your resolver
}

function permissionMiddleware(root, args, ctx, info, next) {
    // your middleware logic
    // call next() to forward it to the next middleware or to your resolver
}

2. Express level middleware

import { applyMiddleware } from 'tuktakjs';

site: applyMiddleware(
    authMiddleware,
    permissionMiddleware({ action: 'delete', resource: 'site' }),
    async (req, res) => {
        // your business logic
    }
);

function permissionMiddleware({ action, resource }) {
    return (req, res, next) => {
        // invoke next() after the permission check
    };
}

function authMiddleware(req, res, next, ourNext) {
    // your middleware logic
    // call ourNext() to forward it to the next middleware or to your controller
}