| | |
| | | |
| | | 'use strict'; |
| | | |
| | | /** |
| | | * Cached loaded submodules. |
| | | * @private |
| | | */ |
| | | |
| | | var modules = Object.create(null); |
| | | var preferredCharsets = require('./lib/charset') |
| | | var preferredEncodings = require('./lib/encoding') |
| | | var preferredLanguages = require('./lib/language') |
| | | var preferredMediaTypes = require('./lib/mediaType') |
| | | |
| | | /** |
| | | * Module exports. |
| | |
| | | }; |
| | | |
| | | Negotiator.prototype.charsets = function charsets(available) { |
| | | var preferredCharsets = loadModule('charset').preferredCharsets; |
| | | return preferredCharsets(this.request.headers['accept-charset'], available); |
| | | }; |
| | | |
| | |
| | | }; |
| | | |
| | | Negotiator.prototype.encodings = function encodings(available) { |
| | | var preferredEncodings = loadModule('encoding').preferredEncodings; |
| | | return preferredEncodings(this.request.headers['accept-encoding'], available); |
| | | }; |
| | | |
| | |
| | | }; |
| | | |
| | | Negotiator.prototype.languages = function languages(available) { |
| | | var preferredLanguages = loadModule('language').preferredLanguages; |
| | | return preferredLanguages(this.request.headers['accept-language'], available); |
| | | }; |
| | | |
| | |
| | | }; |
| | | |
| | | Negotiator.prototype.mediaTypes = function mediaTypes(available) { |
| | | var preferredMediaTypes = loadModule('mediaType').preferredMediaTypes; |
| | | return preferredMediaTypes(this.request.headers.accept, available); |
| | | }; |
| | | |
| | |
| | | Negotiator.prototype.preferredLanguages = Negotiator.prototype.languages; |
| | | Negotiator.prototype.preferredMediaType = Negotiator.prototype.mediaType; |
| | | Negotiator.prototype.preferredMediaTypes = Negotiator.prototype.mediaTypes; |
| | | |
| | | /** |
| | | * Load the given module. |
| | | * @private |
| | | */ |
| | | |
| | | function loadModule(moduleName) { |
| | | var module = modules[moduleName]; |
| | | |
| | | if (module !== undefined) { |
| | | return module; |
| | | } |
| | | |
| | | // This uses a switch for static require analysis |
| | | switch (moduleName) { |
| | | case 'charset': |
| | | module = require('./lib/charset'); |
| | | break; |
| | | case 'encoding': |
| | | module = require('./lib/encoding'); |
| | | break; |
| | | case 'language': |
| | | module = require('./lib/language'); |
| | | break; |
| | | case 'mediaType': |
| | | module = require('./lib/mediaType'); |
| | | break; |
| | | default: |
| | | throw new Error('Cannot find module \'' + moduleName + '\''); |
| | | } |
| | | |
| | | // Store to prevent invoking require() |
| | | modules[moduleName] = module; |
| | | |
| | | return module; |
| | | } |