en-route

Routing for static site generators, build systems and task runners, heavily based on express.js routes but works with file objects. Used by Assemble, Verb, and Template.

Please consider following this project’s author, Jon Schlinkert, and consider starring the project to show your ❤️ and support.

Install

Install with npm:

$ npm install --save en-route

How it works

en-route is a different, but similar concept to routes you might be familiar with, like express routes. The general idea is, you can:

1. Use middleware to modify file objects
2. Define routes, to determine whether or not a middleware function should run on a given file.
3. Define handlers for running specific middleware at specific points in your application or build.

See the examples folder for a number of different examples of how en-route works.

Usage

const Router = require('en-route');
const router = new Router();

API

Router

Create a new Router with the given options.

Params

• options {object}

Example

// initialize a router with handler methdods
const router = new Router({ handlers: ['preWrite', 'postWrite'] });

.handlers

Register one or more middleware handler methods. Handler methods may also be added by passing an array of handler names to the constructor on the handlers option.

Params

• methods {string}: Method names
• options {object}
• returns {object}: Returns the instance for chaining.

Example

router.handlers(['onLoad', 'preRender']);

.handler

Register a middleware handler method.

Params

• method {string}: Method name
• options {object}
• returns {object}: Returns the instance for chaining.

Example

router.handler('onLoad');

.route

Create a new router instance with all handler methods bound to the given pattern.

Params

• pattern {string}
• options {object}: Options to pass to new router.
• returns {object}: Returns a new router instance with handler methods bound to the given pattern.

Example

const router = new Router({ handlers: ['before', 'after'] });
const file = { path: '/foo', content: '' };

router.route('/foo')
  .before(function(file) {
    file.content += 'foo';
  })
  .after(function(file) {
    file.content += 'bar';
  });

router.handle(file)
  .then(() => {
    assert.equal(file.content, 'foobar');
  });

.handle

Run a middleware methods on the given file.

Params

• method {string|file}: The handler method to call on file. If the first argument is a file object, all handlers will be called on the file.
• file {object}: File object
• returns {Promise}

Example

// run a specific method
router.handle('onLoad', file)
  .then(file => console.log('File:', file))
  .catch(console.error);

// run multiple methods
router.handle('onLoad', file)
  .then(file => router.handle('preRender', file))
  .catch(console.error);

// run all methods
router.handle(file)
  .then(file => console.log('File:', file))
  .catch(console.error);

.all

Runs all handler methods on the given file, in series.

Params

• file {object}: File object
• returns {Promise}

Example

router.all(file => {
  file.data.title = 'Home';
});

.mixin

Mix router methods onto the given object.

Params

• target {object}
• returns {undefined}

Example

const router = new Router();
const obj = {};
router.handlers(['before', 'after']);
router.mixin(obj);
console.log(obj.before) //=> [function]

Route

Create a new Route with the given pattern, handler functions and options.

Params

• pattern {string|regex}
• fns {function|array}: One or more middleware functions.
• options {object}

Example

const fn = file => file.count++;
const Route = require('en-route').Route;
const route = new Route('/(.*)', [fn, fn, fn]);
const file = { path: '/foo', count: 0 };

route.handle(file)
  .then(file => {
    console.log(file.count); // 3
  });

.all

Register one or more handler functions to be called on all layers on the route.

Params

• fns {function|array}: Handler function or array of handler functions.
• returns {object}: Route instance for chaining

Example

route.all(function(file) {
  file.data.title = 'Home';
});
route.all([
  function(file) {},
  function(file) {}
]);

.handle

Run a middleware stack on the given file.

Params

• file {object}: File object
• returns {object}: Callback that exposes err and file
• returns {object}: Returns a promise with the file object.

Example

route.handle(file)
  .then(file => console.log('File:', file))
  .catch(console.error);

.layer

Push a layer onto the stack for a middleware functions.

Params

• pattern {string|regex}: The pattern to use for matching files to determin if they should be handled.
• fn {function|array}: Middleware functions
• returns {object}: Route instance for chaining

Example

route.layer(/foo/, file => {
  // do stuff to file
  file.layout = 'default';
});

.layers

Push a layer onto the stack for one or more middleware functions.

Params

• pattern {string|regex}
• fns {function|array}: One or more middleware functions
• returns {object}: Route instance for chaining

Example

route.layers(/foo/, function);
route.layers(/bar/, [function, function]);

Layer

Create a new Layer with the given pattern, handler function and options.

Params

• pattern {string}
• handler {function}
• options {object}

Example

const layer = new Layer('/', file => {
  // do stuff to file
  file.extname = '.html';
});

.handle

Calls the layer handler on the given file if the file.path matches the layer pattern.

Params

• file {object}: File object
• returns {Promise}

Example

layer.handle(file)
  .then(() => console.log('Done:', file))
  .then(console.error)

.match

Attempts to match a file path with the layer pattern. If the path matches, an object of params is returned (see path-to-regexp for details), otherwise null is returned.

Params

• filepath {string}
• returns {object|null}

Example

const layer = new Layer('/:name');
console.log(layer.match('/foo')) //=> { name: 'foo' }

Release history

v2.0.0

Breaking changes

• en-route was completely refactored from the ground-up.

v1.0.0

Breaking changes

• en-route no longer supports error middleware (middleware with three arguments). This was done to simplify debugging, eliminate code debt that makes en-route harder to maintain and improve, to make en-route and middleware run faster, and to make certain that errors are always passed to the final done function.

About

$ npm install && npm test

$ npm install -g verbose/verb#dev verb-generate-readme && verb

Related projects

You might also be interested in these projects:

• assemble: Get the rocks out of your socks! Assemble makes you fast at creating web projects… more | homepage
• base-routes: Plugin for adding routes support to your base application. Requires templates support to work. | homepage
• base: Framework for rapidly creating high quality, server-side node.js applications, using plugins like building blocks | homepage
• gulp-routes: Add middleware to run for specified routes in your gulp pipeline. | homepage

Contributors

Author

Brian Woodward

• GitHub Profile
• Twitter Profile
• LinkedIn Profile

Jon Schlinkert

• GitHub Profile
• Twitter Profile
• LinkedIn Profile

License

Copyright © 2018, Jon Schlinkert.
Released under the MIT License.

This file was generated by verb-generate-readme, v0.8.0, on November 11, 2018.