angie
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Angie: A Module-Based NodeJS Web Application Framework in ES6
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JavaScript
/**
* @module routes.js
* @author Joe Groseclose <@benderTheCrime>
* @date 8/16/2015
*/
// System Modules
import $LogProvider from 'angie-log';
// Angie Modules
import $Util, { $StringUtil } from '../util/util';
const IGNORE_KEYS = [
'Controller',
'template',
'templatePath',
'serializers',
'renderer',
'flags'
];
let routes = {
'/': {
templatePath: 'index.html'
},
'/404': {
templatePath: '404.html'
},
'/500': {
templatePath: '404.html'
}
},
otherwise;
/**
* @desc $Routes is provided to any service, Controller, directive, Model,
* or view which has included it as an argument as "$Routes".
* @todo use Symbols for RegExp store
* @since 0.0.1
*/
class $Routes {
/**
* @desc Sets up a route as a possible endpoint in an Angie application.
* @since 0.0.1
* @param {string|Object} str String or RegExp to denote the endpoint
* path. Supports RegExp flags
* @param {Object} obj
* @param {?string} obj.templatePath Optional template path
* @param {?string} obj.template Optional template html
* @param {?string} obj.Controller The name of the associated Controller
* @param {?object} obj.* A deep route with another route object
* to associate with a route consisting of the original path added to the
* new key
* @returns {function} Template function, compiles in whatever scope is
* passed
* @access public
* @example $Routes.when('/test', {
* template: '<div>{{{test}}}</div>',
* Controller: 'TestCtrl',
* test2: {
* template: '<div>{{{test2}}}</div>',
* Controller: 'Test2Ctrl'
* }
* });
*/
static when(path, obj) {
let regExpFlag = false;
// Determine if the route is RegExp or not and register the route
if (path.constructor.name === 'RegExp') {
regExpFlag = true;
if (!routes.hasOwnProperty('regExp')) {
routes.regExp = {};
}
// We have to deliberately strip off the flags
// Set a RegExp route
routes.regExp[ path ] = $Util._extend(obj, { flags: path.flags });
} else {
// Set a string route
routes[ path ] = obj;
}
// Find any "deep" routes which we may want to add on to the root route
for (let key in obj) {
let childPath,
childObj = obj[ key ];
// We're talking about a template or a Controller and we don't want
// that
// Serializers and Renderer added for REST Framework
// It's worth noting that return based "if"s in Coffee are pretty
// dope
if (IGNORE_KEYS.indexOf(key) > -1) {
continue;
}
// Child keys that do not have object values are ignored, but we
// still want to delete the object property
if (typeof childObj === 'object') {
if (regExpFlag || /\/.*\//.test(key)) {
// Check to see if we previously had or now have a path with
// RegExp
childPath = this.$$stringsToRegExp(
path,
$StringUtil.removeTrailingLeadingSlashes(key)
);
} else {
// Concatenate two string paths
childPath = [ path, key ].join('/').replace(/\/\//g, '/');
}
// If the child route does not have a Controller, force it to
// it's parent inherit
if (obj.Controller && !childObj.Controller) {
childObj.Controller = obj.Controller;
}
// Set a route child object
this.when(childPath, childObj);
}
// Strip the child from the original route object
delete obj[ key ];
}
return this;
}
/**
* @desc Sets a defaulted path in the event that none of the other routes
* or route patterns are matching. If this is a relative path, it will match
* absolutely. If this is a full path, it will result in a 301 redirect.
*
* @since 0.0.1
* @param {string} path URL string to set as the "otherwise" path
* @returns {string} The same URL string
* @access public
* @example $Route.otherwise('/test');
*/
static otherwise(path) {
if (typeof path === 'string') {
otherwise = path;
} else {
// Redirection can only occur based on this path if path is a string
$LogProvider.warn(
'Cannot set "otherwise" route to anything other than a string'
);
}
return path;
}
/**
* @desc Returns all of the set application routes
* @since 0.0.1
* @returns {object} Routes object (inc. RegExps) and otherwise path objects
* @access public
*/
static fetch() {
let obj = { routes };
if (otherwise) {
obj.otherwise = otherwise;
}
return obj;
}
/**
* @desc $Routes.$$clear is a helper method designated to clear out all
* of the routes in the test environment. Don't call it or you might have a
* bad time.
* @since 0.2.5
* @access private
* @example $Routes.$$clear() // routes = {};
*/
static $$clear() {
routes = {};
otherwise = undefined;
}
/**
* @desc Take RegExp literals or strings and return a new RexExp
* @since 0.2.5
* @param {string|object} str Arguments of strings or RegExp literals
* @returns {object} Concatenated RegExps joined by "/"
* @access private
* @example var regExp = $Routes.$$stringsToRegExp(/test/, test);
* regExp.test('test/test') === true;
*/
static $$stringsToRegExp() {
const args = Array.prototype.slice.call(arguments).map(
v => $StringUtil.removeTrailingLeadingSlashes(v.toString())
),
flags = args.slice(-1)[ 0 ],
// We need to unitize the last matching string pair here
flagArr = flags.split(/(\/)/),
flagStr = flagArr.slice(-1)[ 0 ].match(/([giym]{0,4})/)[ 1 ];
// Replace the clause in the last part of the passed array
args[ args.length - 1 ] = flagArr[ 0 ];
return new RegExp(args.join('\\/'), flagStr);
}
/**
* @desc $Routes.$$parseURLParams is a function that will strip the
* paramters out of RegExp pattern routes
*
* It is a private method
* @since 0.2.3
* @param {string} t Template string to be processed
* @returns {function} Template function, compiles in whatever scope is passed
* @access private
* @example $compile('{{{test}}}')({ test: 1 }) === 1; // true
*/
static $$parseURLParams(pattern, path) {
let obj = {};
// If and only if the pattern and path exist
if (pattern && path) {
// Strip slashes
$StringUtil.removeTrailingLeadingSlashes(
path.replace(pattern, '$1|$2|$3|$4|$5')
).split('|').forEach(
// Pull the paramter from the parsed replace string if there is
// a match
function(v, i) {
if (v.indexOf(`$${i + 1}`) === -1) {
obj[ i ] = v;
}
}
);
}
// Param keys are matched indices and flagged with keys 0-5
return obj;
}
}
export default $Routes;