@blaasvaer/frmwrk/router.js

My personal Node framework

const url = require('url');

/**
 * This is the router for the fw framework.
 * 
 * @author Sam Blåsvær <sam@blaasvaer.dk>
 * Version 1.0.0
 * Copyright 2018 - present day.
 */
global.routes = [];

global.ROUTE = function ( route, action, params = null ) {
	let _route = route.split('/');

	let r = {
		"controller": _route[1] == '' ? 'index' : _route[1],
		"resource": _route[2] == '' ? '' : _route[2],
		"resource_id": _route[3] == '' ? '' : _route[3],
		"route": route,
		"action": action,
		"params": params,
	}

	global.routes.push( r );
};

/**
 * A route can be either static or dynamic.
 * A static route is defined in the controllers and dynamic routes will be resolved automatically.
 * In order to figure out if we have a static route, we check the pathname and match it against the global.routes object.
 * If we do not find any match we asume the route is dynamic and therefore pass '/api/:resource' on.
 * @param {string} url The url to find
 * @returns object
 */
function findRoute ( url ) {
	let pathname = url.pathname,
		url_array = pathname.split('/').filter( e => e );

	let route = global.routes.find( ( obj ) => obj.route === FW.utils.removeTrailingSlashes( pathname ) );

	if ( route ) {
		return route;
	} else {
		// Check if route is an API call
		let isAPICall = pathname.split('/')[1] === 'api' ? true : false;
		
		if ( isAPICall ) {
			/**
			 * If checking for UUID use:
			 * UUID v1:
			 * /^[0-9A-F]{8}-[0-9A-F]{4}-[1][0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i
			 * UUID v2:
			 * /^[0-9A-F]{8}-[0-9A-F]{4}-[2][0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i
			 * UUID v3:
			 * /^[0-9A-F]{8}-[0-9A-F]{4}-[3][0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i
			 * UUID v4:
			 * /^[0-9A-F]{8}-[0-9A-F]{4}-[4][0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i
			 * UUID v5:
			 * /^[0-9A-F]{8}-[0-9A-F]{4}-[5][0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i
			 */
			
			let regex = /()/;
			
			switch ( url_array.length ) {
			case 2:
				regex = /api\/(?<resource>[a-z_]+)/; // match /api/<resource>
				route = global.routes.find( ( obj ) => obj.route === '/api/:resources' );
				break;
			case 3:
				// Check for static route with dynamic resource_id
				let static_route_path = '/' + url_array[0] + '/' + url_array[1] + '/:id';
				let static_route = global.routes.find( ( obj ) => obj.route === static_route_path );

				// If we don't find a static route we pass on a dynamic
				if ( ! static_route ) {
					regex = /api\/(?<resource>[a-z_]+)\/(?<id>[0-9]+)/; // match /api/<resource>/<id>
					route = global.routes.find( ( obj ) => obj.route === '/api/:resources/:id' );
				} else {
					let resource = url_array[1];
					regex = new RegExp(`\/api\/${resource}\/(?<id>[0-9]+)`); // match /api/resource/<id>
					route = global.routes.find( ( obj ) => obj.route === '/api/' + url_array[1] + '/:id' );
				}
				break;
			}

			let regex_result = pathname.match(regex);

			if ( regex_result ) {
				let regex_groups = regex_result.groups;
				route.resource = regex_groups.resource;
				route.resource_id = regex_groups.id;
			}

			return route;
		} else {
			return global.routes.find( ( obj ) => obj.route === FW.utils.removeTrailingSlashes( pathname ) );
		}
	}
}

module.exports = {
	findRoute
}