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authorJo-Philipp Wich <jo@mein.io>2019-11-05 10:27:59 +0100
committerJo-Philipp Wich <jo@mein.io>2019-11-05 10:42:54 +0100
commitbaa727de93db009f90d70a80a9861758a24eae77 (patch)
treefd91ac853abc2feef5496720e5284e911ad1b020 /docs/jsapi/luci.js.html
parent355a48866d1a43df9443a3b559c8ec8642343f3a (diff)
docs: rename documentation folder to docs
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+ <meta charset="utf-8">
+ <title>JSDoc: Source: luci.js</title>
+
+ <script src="scripts/prettify/prettify.js"> </script>
+ <script src="scripts/prettify/lang-css.js"> </script>
+ <!--[if lt IE 9]>
+ <script src="//html5shiv.googlecode.com/svn/trunk/html5.js"></script>
+ <![endif]-->
+ <link type="text/css" rel="stylesheet" href="styles/prettify-tomorrow.css">
+ <link type="text/css" rel="stylesheet" href="styles/jsdoc-default.css">
+</head>
+
+<body>
+
+<div id="main">
+
+ <h1 class="page-title">Source: luci.js</h1>
+
+
+
+
+
+
+ <section>
+ <article>
+ <pre class="prettyprint source linenums"><code>/**
+ * @class LuCI
+ * @classdesc
+ *
+ * This is the LuCI base class. It is automatically instantiated and
+ * accessible using the global `L` variable.
+ *
+ * @param {Object} env
+ * The environment settings to use for the LuCI runtime.
+ */
+
+(function(window, document, undefined) {
+ 'use strict';
+
+ /* Object.assign polyfill for IE */
+ if (typeof Object.assign !== 'function') {
+ Object.defineProperty(Object, 'assign', {
+ value: function assign(target, varArgs) {
+ if (target == null)
+ throw new TypeError('Cannot convert undefined or null to object');
+
+ var to = Object(target);
+
+ for (var index = 1; index &lt; arguments.length; index++)
+ if (arguments[index] != null)
+ for (var nextKey in arguments[index])
+ if (Object.prototype.hasOwnProperty.call(arguments[index], nextKey))
+ to[nextKey] = arguments[index][nextKey];
+
+ return to;
+ },
+ writable: true,
+ configurable: true
+ });
+ }
+
+ /* Promise.finally polyfill */
+ if (typeof Promise.prototype.finally !== 'function') {
+ Promise.prototype.finally = function(fn) {
+ var onFinally = function(cb) {
+ return Promise.resolve(fn.call(this)).then(cb);
+ };
+
+ return this.then(
+ function(result) { return onFinally.call(this, function() { return result }) },
+ function(reason) { return onFinally.call(this, function() { return Promise.reject(reason) }) }
+ );
+ };
+ }
+
+ /*
+ * Class declaration and inheritance helper
+ */
+
+ var toCamelCase = function(s) {
+ return s.replace(/(?:^|[\. -])(.)/g, function(m0, m1) { return m1.toUpperCase() });
+ };
+
+ /**
+ * @class Class
+ * @hideconstructor
+ * @memberof LuCI
+ * @classdesc
+ *
+ * `LuCI.Class` is the abstract base class all LuCI classes inherit from.
+ *
+ * It provides simple means to create subclasses of given classes and
+ * implements prototypal inheritance.
+ */
+ var superContext = null, Class = Object.assign(function() {}, {
+ /**
+ * Extends this base class with the properties described in
+ * `properties` and returns a new subclassed Class instance
+ *
+ * @memberof LuCI.Class
+ *
+ * @param {Object&lt;string, *>} properties
+ * An object describing the properties to add to the new
+ * subclass.
+ *
+ * @returns {LuCI.Class}
+ * Returns a new LuCI.Class sublassed from this class, extended
+ * by the given properties and with its prototype set to this base
+ * class to enable inheritance. The resulting value represents a
+ * class constructor and can be instantiated with `new`.
+ */
+ extend: function(properties) {
+ var props = {
+ __base__: { value: this.prototype },
+ __name__: { value: properties.__name__ || 'anonymous' }
+ };
+
+ var ClassConstructor = function() {
+ if (!(this instanceof ClassConstructor))
+ throw new TypeError('Constructor must not be called without "new"');
+
+ if (Object.getPrototypeOf(this).hasOwnProperty('__init__')) {
+ if (typeof(this.__init__) != 'function')
+ throw new TypeError('Class __init__ member is not a function');
+
+ this.__init__.apply(this, arguments)
+ }
+ else {
+ this.super('__init__', arguments);
+ }
+ };
+
+ for (var key in properties)
+ if (!props[key] &amp;&amp; properties.hasOwnProperty(key))
+ props[key] = { value: properties[key], writable: true };
+
+ ClassConstructor.prototype = Object.create(this.prototype, props);
+ ClassConstructor.prototype.constructor = ClassConstructor;
+ Object.assign(ClassConstructor, this);
+ ClassConstructor.displayName = toCamelCase(props.__name__.value + 'Class');
+
+ return ClassConstructor;
+ },
+
+ /**
+ * Extends this base class with the properties described in
+ * `properties`, instantiates the resulting subclass using
+ * the additional optional arguments passed to this function
+ * and returns the resulting subclassed Class instance.
+ *
+ * This function serves as a convenience shortcut for
+ * {@link LuCI.Class.extend Class.extend()} and subsequent
+ * `new`.
+ *
+ * @memberof LuCI.Class
+ *
+ * @param {Object&lt;string, *>} properties
+ * An object describing the properties to add to the new
+ * subclass.
+ *
+ * @param {...*} [new_args]
+ * Specifies arguments to be passed to the subclass constructor
+ * as-is in order to instantiate the new subclass.
+ *
+ * @returns {LuCI.Class}
+ * Returns a new LuCI.Class instance extended by the given
+ * properties with its prototype set to this base class to
+ * enable inheritance.
+ */
+ singleton: function(properties /*, ... */) {
+ return Class.extend(properties)
+ .instantiate(Class.prototype.varargs(arguments, 1));
+ },
+
+ /**
+ * Calls the class constructor using `new` with the given argument
+ * array being passed as variadic parameters to the constructor.
+ *
+ * @memberof LuCI.Class
+ *
+ * @param {Array&lt;*>} params
+ * An array of arbitrary values which will be passed as arguments
+ * to the constructor function.
+ *
+ * @param {...*} [new_args]
+ * Specifies arguments to be passed to the subclass constructor
+ * as-is in order to instantiate the new subclass.
+ *
+ * @returns {LuCI.Class}
+ * Returns a new LuCI.Class instance extended by the given
+ * properties with its prototype set to this base class to
+ * enable inheritance.
+ */
+ instantiate: function(args) {
+ return new (Function.prototype.bind.apply(this,
+ Class.prototype.varargs(args, 0, null)))();
+ },
+
+ /* unused */
+ call: function(self, method) {
+ if (typeof(this.prototype[method]) != 'function')
+ throw new ReferenceError(method + ' is not defined in class');
+
+ return this.prototype[method].apply(self, self.varargs(arguments, 1));
+ },
+
+ /**
+ * Checks whether the given class value is a subclass of this class.
+ *
+ * @memberof LuCI.Class
+ *
+ * @param {LuCI.Class} classValue
+ * The class object to test.
+ *
+ * @returns {boolean}
+ * Returns `true` when the given `classValue` is a subclass of this
+ * class or `false` if the given value is not a valid class or not
+ * a subclass of this class'.
+ */
+ isSubclass: function(classValue) {
+ return (classValue != null &amp;&amp;
+ typeof(classValue) == 'function' &amp;&amp;
+ classValue.prototype instanceof this);
+ },
+
+ prototype: {
+ /**
+ * Extract all values from the given argument array beginning from
+ * `offset` and prepend any further given optional parameters to
+ * the beginning of the resulting array copy.
+ *
+ * @memberof LuCI.Class
+ * @instance
+ *
+ * @param {Array&lt;*>} args
+ * The array to extract the values from.
+ *
+ * @param {number} offset
+ * The offset from which to extract the values. An offset of `0`
+ * would copy all values till the end.
+ *
+ * @param {...*} [extra_args]
+ * Extra arguments to add to prepend to the resultung array.
+ *
+ * @returns {Array&lt;*>}
+ * Returns a new array consisting of the optional extra arguments
+ * and the values extracted from the `args` array beginning with
+ * `offset`.
+ */
+ varargs: function(args, offset /*, ... */) {
+ return Array.prototype.slice.call(arguments, 2)
+ .concat(Array.prototype.slice.call(args, offset));
+ },
+
+ /**
+ * Walks up the parent class chain and looks for a class member
+ * called `key` in any of the parent classes this class inherits
+ * from. Returns the member value of the superclass or calls the
+ * member as function and returns its return value when the
+ * optional `callArgs` array is given.
+ *
+ * This function has two signatures and is sensitive to the
+ * amount of arguments passed to it:
+ * - `super('key')` -
+ * Returns the value of `key` when found within one of the
+ * parent classes.
+ * - `super('key', ['arg1', 'arg2'])` -
+ * Calls the `key()` method with parameters `arg1` and `arg2`
+ * when found within one of the parent classes.
+ *
+ * @memberof LuCI.Class
+ * @instance
+ *
+ * @param {string} key
+ * The name of the superclass member to retrieve.
+ *
+ * @param {Array&lt;*>} [callArgs]
+ * An optional array of function call parameters to use. When
+ * this parameter is specified, the found member value is called
+ * as function using the values of this array as arguments.
+ *
+ * @throws {ReferenceError}
+ * Throws a `ReferenceError` when `callArgs` are specified and
+ * the found member named by `key` is not a function value.
+ *
+ * @returns {*|null}
+ * Returns the value of the found member or the return value of
+ * the call to the found method. Returns `null` when no member
+ * was found in the parent class chain or when the call to the
+ * superclass method returned `null`.
+ */
+ super: function(key, callArgs) {
+ for (superContext = Object.getPrototypeOf(superContext ||
+ Object.getPrototypeOf(this));
+ superContext &amp;&amp; !superContext.hasOwnProperty(key);
+ superContext = Object.getPrototypeOf(superContext)) { }
+
+ if (!superContext)
+ return null;
+
+ var res = superContext[key];
+
+ if (arguments.length > 1) {
+ if (typeof(res) != 'function')
+ throw new ReferenceError(key + ' is not a function in base class');
+
+ if (typeof(callArgs) != 'object')
+ callArgs = this.varargs(arguments, 1);
+
+ res = res.apply(this, callArgs);
+ }
+
+ superContext = null;
+
+ return res;
+ },
+
+ /**
+ * Returns a string representation of this class.
+ *
+ * @returns {string}
+ * Returns a string representation of this class containing the
+ * constructor functions `displayName` and describing the class
+ * members and their respective types.
+ */
+ toString: function() {
+ var s = '[' + this.constructor.displayName + ']', f = true;
+ for (var k in this) {
+ if (this.hasOwnProperty(k)) {
+ s += (f ? ' {\n' : '') + ' ' + k + ': ' + typeof(this[k]) + '\n';
+ f = false;
+ }
+ }
+ return s + (f ? '' : '}');
+ }
+ }
+ });
+
+
+ /**
+ * @class
+ * @memberof LuCI
+ * @hideconstructor
+ * @classdesc
+ *
+ * The `Headers` class is an internal utility class exposed in HTTP
+ * response objects using the `response.headers` property.
+ */
+ var Headers = Class.extend(/** @lends LuCI.Headers.prototype */ {
+ __name__: 'LuCI.XHR.Headers',
+ __init__: function(xhr) {
+ var hdrs = this.headers = {};
+ xhr.getAllResponseHeaders().split(/\r\n/).forEach(function(line) {
+ var m = /^([^:]+):(.*)$/.exec(line);
+ if (m != null)
+ hdrs[m[1].trim().toLowerCase()] = m[2].trim();
+ });
+ },
+
+ /**
+ * Checks whether the given header name is present.
+ * Note: Header-Names are case-insensitive.
+ *
+ * @instance
+ * @memberof LuCI.Headers
+ * @param {string} name
+ * The header name to check
+ *
+ * @returns {boolean}
+ * Returns `true` if the header name is present, `false` otherwise
+ */
+ has: function(name) {
+ return this.headers.hasOwnProperty(String(name).toLowerCase());
+ },
+
+ /**
+ * Returns the value of the given header name.
+ * Note: Header-Names are case-insensitive.
+ *
+ * @instance
+ * @memberof LuCI.Headers
+ * @param {string} name
+ * The header name to read
+ *
+ * @returns {string|null}
+ * The value of the given header name or `null` if the header isn't present.
+ */
+ get: function(name) {
+ var key = String(name).toLowerCase();
+ return this.headers.hasOwnProperty(key) ? this.headers[key] : null;
+ }
+ });
+
+ /**
+ * @class
+ * @memberof LuCI
+ * @hideconstructor
+ * @classdesc
+ *
+ * The `Response` class is an internal utility class representing HTTP responses.
+ */
+ var Response = Class.extend({
+ __name__: 'LuCI.XHR.Response',
+ __init__: function(xhr, url, duration, headers, content) {
+ /**
+ * Describes whether the response is successful (status codes `200..299`) or not
+ * @instance
+ * @memberof LuCI.Response
+ * @name ok
+ * @type {boolean}
+ */
+ this.ok = (xhr.status >= 200 &amp;&amp; xhr.status &lt;= 299);
+
+ /**
+ * The numeric HTTP status code of the response
+ * @instance
+ * @memberof LuCI.Response
+ * @name status
+ * @type {number}
+ */
+ this.status = xhr.status;
+
+ /**
+ * The HTTP status description message of the response
+ * @instance
+ * @memberof LuCI.Response
+ * @name statusText
+ * @type {string}
+ */
+ this.statusText = xhr.statusText;
+
+ /**
+ * The HTTP headers of the response
+ * @instance
+ * @memberof LuCI.Response
+ * @name headers
+ * @type {LuCI.Headers}
+ */
+ this.headers = (headers != null) ? headers : new Headers(xhr);
+
+ /**
+ * The total duration of the HTTP request in milliseconds
+ * @instance
+ * @memberof LuCI.Response
+ * @name duration
+ * @type {number}
+ */
+ this.duration = duration;
+
+ /**
+ * The final URL of the request, i.e. after following redirects.
+ * @instance
+ * @memberof LuCI.Response
+ * @name url
+ * @type {string}
+ */
+ this.url = url;
+
+ /* privates */
+ this.xhr = xhr;
+
+ if (content != null &amp;&amp; typeof(content) == 'object') {
+ this.responseJSON = content;
+ this.responseText = null;
+ }
+ else if (content != null) {
+ this.responseJSON = null;
+ this.responseText = String(content);
+ }
+ else {
+ this.responseJSON = null;
+ this.responseText = xhr.responseText;
+ }
+ },
+
+ /**
+ * Clones the given response object, optionally overriding the content
+ * of the cloned instance.
+ *
+ * @instance
+ * @memberof LuCI.Response
+ * @param {*} [content]
+ * Override the content of the cloned response. Object values will be
+ * treated as JSON response data, all other types will be converted
+ * using `String()` and treated as response text.
+ *
+ * @returns {LuCI.Response}
+ * The cloned `Response` instance.
+ */
+ clone: function(content) {
+ var copy = new Response(this.xhr, this.url, this.duration, this.headers, content);
+
+ copy.ok = this.ok;
+ copy.status = this.status;
+ copy.statusText = this.statusText;
+
+ return copy;
+ },
+
+ /**
+ * Access the response content as JSON data.
+ *
+ * @instance
+ * @memberof LuCI.Response
+ * @throws {SyntaxError}
+ * Throws `SyntaxError` if the content isn't valid JSON.
+ *
+ * @returns {*}
+ * The parsed JSON data.
+ */
+ json: function() {
+ if (this.responseJSON == null)
+ this.responseJSON = JSON.parse(this.responseText);
+
+ return this.responseJSON;
+ },
+
+ /**
+ * Access the response content as string.
+ *
+ * @instance
+ * @memberof LuCI.Response
+ * @returns {string}
+ * The response content.
+ */
+ text: function() {
+ if (this.responseText == null &amp;&amp; this.responseJSON != null)
+ this.responseText = JSON.stringify(this.responseJSON);
+
+ return this.responseText;
+ }
+ });
+
+
+ var requestQueue = [];
+
+ function isQueueableRequest(opt) {
+ if (!classes.rpc)
+ return false;
+
+ if (opt.method != 'POST' || typeof(opt.content) != 'object')
+ return false;
+
+ if (opt.nobatch === true)
+ return false;
+
+ var rpcBaseURL = Request.expandURL(classes.rpc.getBaseURL());
+
+ return (rpcBaseURL != null &amp;&amp; opt.url.indexOf(rpcBaseURL) == 0);
+ }
+
+ function flushRequestQueue() {
+ if (!requestQueue.length)
+ return;
+
+ var reqopt = Object.assign({}, requestQueue[0][0], { content: [], nobatch: true }),
+ batch = [];
+
+ for (var i = 0; i &lt; requestQueue.length; i++) {
+ batch[i] = requestQueue[i];
+ reqopt.content[i] = batch[i][0].content;
+ }
+
+ requestQueue.length = 0;
+
+ Request.request(rpcBaseURL, reqopt).then(function(reply) {
+ var json = null, req = null;
+
+ try { json = reply.json() }
+ catch(e) { }
+
+ while ((req = batch.shift()) != null)
+ if (Array.isArray(json) &amp;&amp; json.length)
+ req[2].call(reqopt, reply.clone(json.shift()));
+ else
+ req[1].call(reqopt, new Error('No related RPC reply'));
+ }).catch(function(error) {
+ var req = null;
+
+ while ((req = batch.shift()) != null)
+ req[1].call(reqopt, error);
+ });
+ }
+
+ /**
+ * @class
+ * @memberof LuCI
+ * @hideconstructor
+ * @classdesc
+ *
+ * The `Request` class allows initiating HTTP requests and provides utilities
+ * for dealing with responses.
+ */
+ var Request = Class.singleton(/** @lends LuCI.Request.prototype */ {
+ __name__: 'LuCI.Request',
+
+ interceptors: [],
+
+ /**
+ * Turn the given relative URL into an absolute URL if necessary.
+ *
+ * @instance
+ * @memberof LuCI.Request
+ * @param {string} url
+ * The URL to convert.
+ *
+ * @returns {string}
+ * The absolute URL derived from the given one, or the original URL
+ * if it already was absolute.
+ */
+ expandURL: function(url) {
+ if (!/^(?:[^/]+:)?\/\//.test(url))
+ url = location.protocol + '//' + location.host + url;
+
+ return url;
+ },
+
+ /**
+ * @typedef {Object} RequestOptions
+ * @memberof LuCI.Request
+ *
+ * @property {string} [method=GET]
+ * The HTTP method to use, e.g. `GET` or `POST`.
+ *
+ * @property {Object&lt;string, Object|string>} [query]
+ * Query string data to append to the URL. Non-string values of the
+ * given object will be converted to JSON.
+ *
+ * @property {boolean} [cache=false]
+ * Specifies whether the HTTP response may be retrieved from cache.
+ *
+ * @property {string} [username]
+ * Provides a username for HTTP basic authentication.
+ *
+ * @property {string} [password]
+ * Provides a password for HTTP basic authentication.
+ *
+ * @property {number} [timeout]
+ * Specifies the request timeout in seconds.
+ *
+ * @property {boolean} [credentials=false]
+ * Whether to include credentials such as cookies in the request.
+ *
+ * @property {*} [content]
+ * Specifies the HTTP message body to send along with the request.
+ * If the value is a function, it is invoked and the return value
+ * used as content, if it is a FormData instance, it is used as-is,
+ * if it is an object, it will be converted to JSON, in all other
+ * cases it is converted to a string.
+ *
+ * @property {Object&lt;string, string>} [header]
+ * Specifies HTTP headers to set for the request.
+ *
+ * @property {function} [progress]
+ * An optional request callback function which receives ProgressEvent
+ * instances as sole argument during the HTTP request transfer.
+ */
+
+ /**
+ * Initiate an HTTP request to the given target.
+ *
+ * @instance
+ * @memberof LuCI.Request
+ * @param {string} target
+ * The URL to request.
+ *
+ * @param {LuCI.Request.RequestOptions} [options]
+ * Additional options to configure the request.
+ *
+ * @returns {Promise&lt;LuCI.Response>}
+ * The resulting HTTP response.
+ */
+ request: function(target, options) {
+ var state = { xhr: new XMLHttpRequest(), url: this.expandURL(target), start: Date.now() },
+ opt = Object.assign({}, options, state),
+ content = null,
+ contenttype = null,
+ callback = this.handleReadyStateChange;
+
+ return new Promise(function(resolveFn, rejectFn) {
+ opt.xhr.onreadystatechange = callback.bind(opt, resolveFn, rejectFn);
+ opt.method = String(opt.method || 'GET').toUpperCase();
+
+ if ('query' in opt) {
+ var q = (opt.query != null) ? Object.keys(opt.query).map(function(k) {
+ if (opt.query[k] != null) {
+ var v = (typeof(opt.query[k]) == 'object')
+ ? JSON.stringify(opt.query[k])
+ : String(opt.query[k]);
+
+ return '%s=%s'.format(encodeURIComponent(k), encodeURIComponent(v));
+ }
+ else {
+ return encodeURIComponent(k);
+ }
+ }).join('&amp;') : '';
+
+ if (q !== '') {
+ switch (opt.method) {
+ case 'GET':
+ case 'HEAD':
+ case 'OPTIONS':
+ opt.url += ((/\?/).test(opt.url) ? '&amp;' : '?') + q;
+ break;
+
+ default:
+ if (content == null) {
+ content = q;
+ contenttype = 'application/x-www-form-urlencoded';
+ }
+ }
+ }
+ }
+
+ if (!opt.cache)
+ opt.url += ((/\?/).test(opt.url) ? '&amp;' : '?') + (new Date()).getTime();
+
+ if (isQueueableRequest(opt)) {
+ requestQueue.push([opt, rejectFn, resolveFn]);
+ requestAnimationFrame(flushRequestQueue);
+ return;
+ }
+
+ if ('username' in opt &amp;&amp; 'password' in opt)
+ opt.xhr.open(opt.method, opt.url, true, opt.username, opt.password);
+ else
+ opt.xhr.open(opt.method, opt.url, true);
+
+ opt.xhr.responseType = 'text';
+
+ if ('overrideMimeType' in opt.xhr)
+ opt.xhr.overrideMimeType('application/octet-stream');
+
+ if ('timeout' in opt)
+ opt.xhr.timeout = +opt.timeout;
+
+ if ('credentials' in opt)
+ opt.xhr.withCredentials = !!opt.credentials;
+
+ if (opt.content != null) {
+ switch (typeof(opt.content)) {
+ case 'function':
+ content = opt.content(xhr);
+ break;
+
+ case 'object':
+ if (!(opt.content instanceof FormData)) {
+ content = JSON.stringify(opt.content);
+ contenttype = 'application/json';
+ }
+ else {
+ content = opt.content;
+ }
+ break;
+
+ default:
+ content = String(opt.content);
+ }
+ }
+
+ if ('headers' in opt)
+ for (var header in opt.headers)
+ if (opt.headers.hasOwnProperty(header)) {
+ if (header.toLowerCase() != 'content-type')
+ opt.xhr.setRequestHeader(header, opt.headers[header]);
+ else
+ contenttype = opt.headers[header];
+ }
+
+ if ('progress' in opt &amp;&amp; 'upload' in opt.xhr)
+ opt.xhr.upload.addEventListener('progress', opt.progress);
+
+ if (contenttype != null)
+ opt.xhr.setRequestHeader('Content-Type', contenttype);
+
+ try {
+ opt.xhr.send(content);
+ }
+ catch (e) {
+ rejectFn.call(opt, e);
+ }
+ });
+ },
+
+ handleReadyStateChange: function(resolveFn, rejectFn, ev) {
+ var xhr = this.xhr,
+ duration = Date.now() - this.start;
+
+ if (xhr.readyState !== 4)
+ return;
+
+ if (xhr.status === 0 &amp;&amp; xhr.statusText === '') {
+ if (duration >= this.timeout)
+ rejectFn.call(this, new Error('XHR request timed out'));
+ else
+ rejectFn.call(this, new Error('XHR request aborted by browser'));
+ }
+ else {
+ var response = new Response(
+ xhr, xhr.responseURL || this.url, duration);
+
+ Promise.all(Request.interceptors.map(function(fn) { return fn(response) }))
+ .then(resolveFn.bind(this, response))
+ .catch(rejectFn.bind(this));
+ }
+ },
+
+ /**
+ * Initiate an HTTP GET request to the given target.
+ *
+ * @instance
+ * @memberof LuCI.Request
+ * @param {string} target
+ * The URL to request.
+ *
+ * @param {LuCI.Request.RequestOptions} [options]
+ * Additional options to configure the request.
+ *
+ * @returns {Promise&lt;LuCI.Response>}
+ * The resulting HTTP response.
+ */
+ get: function(url, options) {
+ return this.request(url, Object.assign({ method: 'GET' }, options));
+ },
+
+ /**
+ * Initiate an HTTP POST request to the given target.
+ *
+ * @instance
+ * @memberof LuCI.Request
+ * @param {string} target
+ * The URL to request.
+ *
+ * @param {*} [data]
+ * The request data to send, see {@link LuCI.Request.RequestOptions} for details.
+ *
+ * @param {LuCI.Request.RequestOptions} [options]
+ * Additional options to configure the request.
+ *
+ * @returns {Promise&lt;LuCI.Response>}
+ * The resulting HTTP response.
+ */
+ post: function(url, data, options) {
+ return this.request(url, Object.assign({ method: 'POST', content: data }, options));
+ },
+
+ /**
+ * Interceptor functions are invoked whenever an HTTP reply is received, in the order
+ * these functions have been registered.
+ * @callback LuCI.Request.interceptorFn
+ * @param {LuCI.Response} res
+ * The HTTP response object
+ */
+
+ /**
+ * Register an HTTP response interceptor function. Interceptor
+ * functions are useful to perform default actions on incoming HTTP
+ * responses, such as checking for expired authentication or for
+ * implementing request retries before returning a failure.
+ *
+ * @instance
+ * @memberof LuCI.Request
+ * @param {LuCI.Request.interceptorFn} interceptorFn
+ * The interceptor function to register.
+ *
+ * @returns {LuCI.Request.interceptorFn}
+ * The registered function.
+ */
+ addInterceptor: function(interceptorFn) {
+ if (typeof(interceptorFn) == 'function')
+ this.interceptors.push(interceptorFn);
+ return interceptorFn;
+ },
+
+ /**
+ * Remove an HTTP response interceptor function. The passed function
+ * value must be the very same value that was used to register the
+ * function.
+ *
+ * @instance
+ * @memberof LuCI.Request
+ * @param {LuCI.Request.interceptorFn} interceptorFn
+ * The interceptor function to remove.
+ *
+ * @returns {boolean}
+ * Returns `true` if any function has been removed, else `false`.
+ */
+ removeInterceptor: function(interceptorFn) {
+ var oldlen = this.interceptors.length, i = oldlen;
+ while (i--)
+ if (this.interceptors[i] === interceptorFn)
+ this.interceptors.splice(i, 1);
+ return (this.interceptors.length &lt; oldlen);
+ },
+
+ /**
+ * @class
+ * @memberof LuCI.Request
+ * @hideconstructor
+ * @classdesc
+ *
+ * The `Request.poll` class provides some convience wrappers around
+ * {@link LuCI.Poll} mainly to simplify registering repeating HTTP
+ * request calls as polling functions.
+ */
+ poll: {
+ /**
+ * The callback function is invoked whenever an HTTP reply to a
+ * polled request is received or when the polled request timed
+ * out.
+ *
+ * @callback LuCI.Request.poll~callbackFn
+ * @param {LuCI.Response} res
+ * The HTTP response object.
+ *
+ * @param {*} data
+ * The response JSON if the response could be parsed as such,
+ * else `null`.
+ *
+ * @param {number} duration
+ * The total duration of the request in milliseconds.
+ */
+
+ /**
+ * Register a repeating HTTP request with an optional callback
+ * to invoke whenever a response for the request is received.
+ *
+ * @instance
+ * @memberof LuCI.Request.poll
+ * @param {number} interval
+ * The poll interval in seconds.
+ *
+ * @param {string} url
+ * The URL to request on each poll.
+ *
+ * @param {LuCI.Request.RequestOptions} [options]
+ * Additional options to configure the request.
+ *
+ * @param {LuCI.Request.poll~callbackFn} [callback]
+ * {@link LuCI.Request.poll~callbackFn Callback} function to
+ * invoke for each HTTP reply.
+ *
+ * @throws {TypeError}
+ * Throws `TypeError` when an invalid interval was passed.
+ *
+ * @returns {function}
+ * Returns the internally created poll function.
+ */
+ add: function(interval, url, options, callback) {
+ if (isNaN(interval) || interval &lt;= 0)
+ throw new TypeError('Invalid poll interval');
+
+ var ival = interval >>> 0,
+ opts = Object.assign({}, options, { timeout: ival * 1000 - 5 });
+
+ var fn = function() {
+ return Request.request(url, options).then(function(res) {
+ if (!Poll.active())
+ return;
+
+ try {
+ callback(res, res.json(), res.duration);
+ }
+ catch (err) {
+ callback(res, null, res.duration);
+ }
+ });
+ };
+
+ return (Poll.add(fn, ival) ? fn : null);
+ },
+
+ /**
+ * Remove a polling request that has been previously added using `add()`.
+ * This function is essentially a wrapper around
+ * {@link LuCI.Poll.remove LuCI.Poll.remove()}.
+ *
+ * @instance
+ * @memberof LuCI.Request.poll
+ * @param {function} entry
+ * The poll function returned by {@link LuCI.Request.poll#add add()}.
+ *
+ * @returns {boolean}
+ * Returns `true` if any function has been removed, else `false`.
+ */
+ remove: function(entry) { return Poll.remove(entry) },
+
+ /**
+ * Alias for {@link LuCI.Poll.start LuCI.Poll.start()}.
+ *
+ * @instance
+ * @memberof LuCI.Request.poll
+ */
+ start: function() { return Poll.start() },
+
+ /**
+ * Alias for {@link LuCI.Poll.stop LuCI.Poll.stop()}.
+ *
+ * @instance
+ * @memberof LuCI.Request.poll
+ */
+ stop: function() { return Poll.stop() },
+
+ /**
+ * Alias for {@link LuCI.Poll.active LuCI.Poll.active()}.
+ *
+ * @instance
+ * @memberof LuCI.Request.poll
+ */
+ active: function() { return Poll.active() }
+ }
+ });
+
+ /**
+ * @class
+ * @memberof LuCI
+ * @hideconstructor
+ * @classdesc
+ *
+ * The `Poll` class allows registering and unregistering poll actions,
+ * as well as starting, stopping and querying the state of the polling
+ * loop.
+ */
+ var Poll = Class.singleton(/** @lends LuCI.Poll.prototype */ {
+ __name__: 'LuCI.Poll',
+
+ queue: [],
+
+ /**
+ * Add a new operation to the polling loop. If the polling loop is not
+ * already started at this point, it will be implicitely started.
+ *
+ * @instance
+ * @memberof LuCI.Poll
+ * @param {function} fn
+ * The function to invoke on each poll interval.
+ *
+ * @param {number} interval
+ * The poll interval in seconds.
+ *
+ * @throws {TypeError}
+ * Throws `TypeError` when an invalid interval was passed.
+ *
+ * @returns {boolean}
+ * Returns `true` if the function has been added or `false` if it
+ * already is registered.
+ */
+ add: function(fn, interval) {
+ if (interval == null || interval &lt;= 0)
+ interval = window.L ? window.L.env.pollinterval : null;
+
+ if (isNaN(interval) || typeof(fn) != 'function')
+ throw new TypeError('Invalid argument to LuCI.Poll.add()');
+
+ for (var i = 0; i &lt; this.queue.length; i++)
+ if (this.queue[i].fn === fn)
+ return false;
+
+ var e = {
+ r: true,
+ i: interval >>> 0,
+ fn: fn
+ };
+
+ this.queue.push(e);
+
+ if (this.tick != null &amp;&amp; !this.active())
+ this.start();
+
+ return true;
+ },
+
+ /**
+ * Remove an operation from the polling loop. If no further operatons
+ * are registered, the polling loop is implicitely stopped.
+ *
+ * @instance
+ * @memberof LuCI.Poll
+ * @param {function} fn
+ * The function to remove.
+ *
+ * @throws {TypeError}
+ * Throws `TypeError` when the given argument isn't a function.
+ *
+ * @returns {boolean}
+ * Returns `true` if the function has been removed or `false` if it
+ * wasn't found.
+ */
+ remove: function(fn) {
+ if (typeof(fn) != 'function')
+ throw new TypeError('Invalid argument to LuCI.Poll.remove()');
+
+ var len = this.queue.length;
+
+ for (var i = len; i > 0; i--)
+ if (this.queue[i-1].fn === fn)
+ this.queue.splice(i-1, 1);
+
+ if (!this.queue.length &amp;&amp; this.stop())
+ this.tick = 0;
+
+ return (this.queue.length != len);
+ },
+
+ /**
+ * (Re)start the polling loop. Dispatches a custom `poll-start` event
+ * to the `document` object upon successful start.
+ *
+ * @instance
+ * @memberof LuCI.Poll
+ * @returns {boolean}
+ * Returns `true` if polling has been started (or if no functions
+ * where registered) or `false` when the polling loop already runs.
+ */
+ start: function() {
+ if (this.active())
+ return false;
+
+ this.tick = 0;
+
+ if (this.queue.length) {
+ this.timer = window.setInterval(this.step, 1000);
+ this.step();
+ document.dispatchEvent(new CustomEvent('poll-start'));
+ }
+
+ return true;
+ },
+
+ /**
+ * Stop the polling loop. Dispatches a custom `poll-stop` event
+ * to the `document` object upon successful stop.
+ *
+ * @instance
+ * @memberof LuCI.Poll
+ * @returns {boolean}
+ * Returns `true` if polling has been stopped or `false` if it din't
+ * run to begin with.
+ */
+ stop: function() {
+ if (!this.active())
+ return false;
+
+ document.dispatchEvent(new CustomEvent('poll-stop'));
+ window.clearInterval(this.timer);
+ delete this.timer;
+ delete this.tick;
+ return true;
+ },
+
+ /* private */
+ step: function() {
+ for (var i = 0, e = null; (e = Poll.queue[i]) != null; i++) {
+ if ((Poll.tick % e.i) != 0)
+ continue;
+
+ if (!e.r)
+ continue;
+
+ e.r = false;
+
+ Promise.resolve(e.fn()).finally((function() { this.r = true }).bind(e));
+ }
+
+ Poll.tick = (Poll.tick + 1) % Math.pow(2, 32);
+ },
+
+ /**
+ * Test whether the polling loop is running.
+ *
+ * @instance
+ * @memberof LuCI.Poll
+ * @returns {boolean} - Returns `true` if polling is active, else `false`.
+ */
+ active: function() {
+ return (this.timer != null);
+ }
+ });
+
+
+ var dummyElem = null,
+ domParser = null,
+ originalCBIInit = null,
+ rpcBaseURL = null,
+ sysFeatures = null,
+ classes = {};
+
+ var LuCI = Class.extend(/** @lends LuCI.prototype */ {
+ __name__: 'LuCI',
+ __init__: function(env) {
+
+ document.querySelectorAll('script[src*="/luci.js"]').forEach(function(s) {
+ if (env.base_url == null || env.base_url == '') {
+ var m = (s.getAttribute('src') || '').match(/^(.*)\/luci\.js(?:\?v=([^?]+))?$/);
+ if (m) {
+ env.base_url = m[1];
+ env.resource_version = m[2];
+ }
+ }
+ });
+
+ if (env.base_url == null)
+ this.error('InternalError', 'Cannot find url of luci.js');
+
+ Object.assign(this.env, env);
+
+ document.addEventListener('poll-start', function(ev) {
+ document.querySelectorAll('[id^="xhr_poll_status"]').forEach(function(e) {
+ e.style.display = (e.id == 'xhr_poll_status_off') ? 'none' : '';
+ });
+ });
+
+ document.addEventListener('poll-stop', function(ev) {
+ document.querySelectorAll('[id^="xhr_poll_status"]').forEach(function(e) {
+ e.style.display = (e.id == 'xhr_poll_status_on') ? 'none' : '';
+ });
+ });
+
+ var domReady = new Promise(function(resolveFn, rejectFn) {
+ document.addEventListener('DOMContentLoaded', resolveFn);
+ });
+
+ Promise.all([
+ domReady,
+ this.require('ui'),
+ this.require('rpc'),
+ this.require('form'),
+ this.probeRPCBaseURL()
+ ]).then(this.setupDOM.bind(this)).catch(this.error);
+
+ originalCBIInit = window.cbi_init;
+ window.cbi_init = function() {};
+ },
+
+ /**
+ * Captures the current stack trace and throws an error of the
+ * specified type as a new exception. Also logs the exception as
+ * error to the debug console if it is available.
+ *
+ * @instance
+ * @memberof LuCI
+ *
+ * @param {Error|string} [type=Error]
+ * Either a string specifying the type of the error to throw or an
+ * existing `Error` instance to copy.
+ *
+ * @param {string} [fmt=Unspecified error]
+ * A format string which is used to form the error message, together
+ * with all subsequent optional arguments.
+ *
+ * @param {...*} [args]
+ * Zero or more variable arguments to the supplied format string.
+ *
+ * @throws {Error}
+ * Throws the created error object with the captured stack trace
+ * appended to the message and the type set to the given type
+ * argument or copied from the given error instance.
+ */
+ raise: function(type, fmt /*, ...*/) {
+ var e = null,
+ msg = fmt ? String.prototype.format.apply(fmt, this.varargs(arguments, 2)) : null,
+ stack = null;
+
+ if (type instanceof Error) {
+ e = type;
+
+ if (msg)
+ e.message = msg + ': ' + e.message;
+ }
+ else {
+ try { throw new Error('stacktrace') }
+ catch (e2) { stack = (e2.stack || '').split(/\n/) }
+
+ e = new (window[type || 'Error'] || Error)(msg || 'Unspecified error');
+ e.name = type || 'Error';
+ }
+
+ stack = (stack || []).map(function(frame) {
+ frame = frame.replace(/(.*?)@(.+):(\d+):(\d+)/g, 'at $1 ($2:$3:$4)').trim();
+ return frame ? ' ' + frame : '';
+ });
+
+ if (!/^ at /.test(stack[0]))
+ stack.shift();
+
+ if (/\braise /.test(stack[0]))
+ stack.shift();
+
+ if (/\berror /.test(stack[0]))
+ stack.shift();
+
+ if (stack.length)
+ e.message += '\n' + stack.join('\n');
+
+ if (window.console &amp;&amp; console.debug)
+ console.debug(e);
+
+ throw e;
+ },
+
+ /**
+ * A wrapper around {@link LuCI#raise raise()} which also renders
+ * the error either as modal overlay when `ui.js` is already loaed
+ * or directly into the view body.
+ *
+ * @instance
+ * @memberof LuCI
+ *
+ * @param {Error|string} [type=Error]
+ * Either a string specifying the type of the error to throw or an
+ * existing `Error` instance to copy.
+ *
+ * @param {string} [fmt=Unspecified error]
+ * A format string which is used to form the error message, together
+ * with all subsequent optional arguments.
+ *
+ * @param {...*} [args]
+ * Zero or more variable arguments to the supplied format string.
+ *
+ * @throws {Error}
+ * Throws the created error object with the captured stack trace
+ * appended to the message and the type set to the given type
+ * argument or copied from the given error instance.
+ */
+ error: function(type, fmt /*, ...*/) {
+ try {
+ L.raise.apply(L, Array.prototype.slice.call(arguments));
+ }
+ catch (e) {
+ if (!e.reported) {
+ if (L.ui)
+ L.ui.addNotification(e.name || _('Runtime error'),
+ E('pre', {}, e.message), 'danger');
+ else
+ L.dom.content(document.querySelector('#maincontent'),
+ E('pre', { 'class': 'alert-message error' }, e.message));
+
+ e.reported = true;
+ }
+
+ throw e;
+ }
+ },
+
+ /**
+ * Return a bound function using the given `self` as `this` context
+ * and any further arguments as parameters to the bound function.
+ *
+ * @instance
+ * @memberof LuCI
+ *
+ * @param {function} fn
+ * The function to bind.
+ *
+ * @param {*} self
+ * The value to bind as `this` context to the specified function.
+ *
+ * @param {...*} [args]
+ * Zero or more variable arguments which are bound to the function
+ * as parameters.
+ *
+ * @returns {function}
+ * Returns the bound function.
+ */
+ bind: function(fn, self /*, ... */) {
+ return Function.prototype.bind.apply(fn, this.varargs(arguments, 2, self));
+ },
+
+ /**
+ * Load an additional LuCI JavaScript class and its dependencies,
+ * instantiate it and return the resulting class instance. Each
+ * class is only loaded once. Subsequent attempts to load the same
+ * class will return the already instantiated class.
+ *
+ * @instance
+ * @memberof LuCI
+ *
+ * @param {string} name
+ * The name of the class to load in dotted notation. Dots will
+ * be replaced by spaces and joined with the runtime-determined
+ * base URL of LuCI.js to form an absolute URL to load the class
+ * file from.
+ *
+ * @throws {DependencyError}
+ * Throws a `DependencyError` when the class to load includes
+ * circular dependencies.
+ *
+ * @throws {NetworkError}
+ * Throws `NetworkError` when the underlying {@link LuCI.Request}
+ * call failed.
+ *
+ * @throws {SyntaxError}
+ * Throws `SyntaxError` when the loaded class file code cannot
+ * be interpreted by `eval`.
+ *
+ * @throws {TypeError}
+ * Throws `TypeError` when the class file could be loaded and
+ * interpreted, but when invoking its code did not yield a valid
+ * class instance.
+ *
+ * @returns {Promise&lt;LuCI#Class>}
+ * Returns the instantiated class.
+ */
+ require: function(name, from) {
+ var L = this, url = null, from = from || [];
+
+ /* Class already loaded */
+ if (classes[name] != null) {
+ /* Circular dependency */
+ if (from.indexOf(name) != -1)
+ L.raise('DependencyError',
+ 'Circular dependency: class "%s" depends on "%s"',
+ name, from.join('" which depends on "'));
+
+ return Promise.resolve(classes[name]);
+ }
+
+ url = '%s/%s.js%s'.format(L.env.base_url, name.replace(/\./g, '/'), (L.env.resource_version ? '?v=' + L.env.resource_version : ''));
+ from = [ name ].concat(from);
+
+ var compileClass = function(res) {
+ if (!res.ok)
+ L.raise('NetworkError',
+ 'HTTP error %d while loading class file "%s"', res.status, url);
+
+ var source = res.text(),
+ requirematch = /^require[ \t]+(\S+)(?:[ \t]+as[ \t]+([a-zA-Z_]\S*))?$/,
+ strictmatch = /^use[ \t]+strict$/,
+ depends = [],
+ args = '';
+
+ /* find require statements in source */
+ for (var i = 0, off = -1, quote = -1, esc = false; i &lt; source.length; i++) {
+ var chr = source.charCodeAt(i);
+
+ if (esc) {
+ esc = false;
+ }
+ else if (chr == 92) {
+ esc = true;
+ }
+ else if (chr == quote) {
+ var s = source.substring(off, i),
+ m = requirematch.exec(s);
+
+ if (m) {
+ var dep = m[1], as = m[2] || dep.replace(/[^a-zA-Z0-9_]/g, '_');
+ depends.push(L.require(dep, from));
+ args += ', ' + as;
+ }
+ else if (!strictmatch.exec(s)) {
+ break;
+ }
+
+ off = -1;
+ quote = -1;
+ }
+ else if (quote == -1 &amp;&amp; (chr == 34 || chr == 39)) {
+ off = i + 1;
+ quote = chr;
+ }
+ }
+
+ /* load dependencies and instantiate class */
+ return Promise.all(depends).then(function(instances) {
+ var _factory, _class;
+
+ try {
+ _factory = eval(
+ '(function(window, document, L%s) { %s })\n\n//# sourceURL=%s\n'
+ .format(args, source, res.url));
+ }
+ catch (error) {
+ L.raise('SyntaxError', '%s\n in %s:%s',
+ error.message, res.url, error.lineNumber || '?');
+ }
+
+ _factory.displayName = toCamelCase(name + 'ClassFactory');
+ _class = _factory.apply(_factory, [window, document, L].concat(instances));
+
+ if (!Class.isSubclass(_class))
+ L.error('TypeError', '"%s" factory yields invalid constructor', name);
+
+ if (_class.displayName == 'AnonymousClass')
+ _class.displayName = toCamelCase(name + 'Class');
+
+ var ptr = Object.getPrototypeOf(L),
+ parts = name.split(/\./),
+ instance = new _class();
+
+ for (var i = 0; ptr &amp;&amp; i &lt; parts.length - 1; i++)
+ ptr = ptr[parts[i]];
+
+ if (ptr)
+ ptr[parts[i]] = instance;
+
+ classes[name] = instance;
+
+ return instance;
+ });
+ };
+
+ /* Request class file */
+ classes[name] = Request.get(url, { cache: true }).then(compileClass);
+
+ return classes[name];
+ },
+
+ /* DOM setup */
+ probeRPCBaseURL: function() {
+ if (rpcBaseURL == null) {
+ try {
+ rpcBaseURL = window.sessionStorage.getItem('rpcBaseURL');
+ }
+ catch (e) { }
+ }
+
+ if (rpcBaseURL == null) {
+ var rpcFallbackURL = this.url('admin/ubus');
+
+ rpcBaseURL = Request.get('/ubus/').then(function(res) {
+ return (rpcBaseURL = (res.status == 400) ? '/ubus/' : rpcFallbackURL);
+ }, function() {
+ return (rpcBaseURL = rpcFallbackURL);
+ }).then(function(url) {
+ try {
+ window.sessionStorage.setItem('rpcBaseURL', url);
+ }
+ catch (e) { }
+
+ return url;
+ });
+ }
+
+ return Promise.resolve(rpcBaseURL);
+ },
+
+ probeSystemFeatures: function() {
+ var sessionid = classes.rpc.getSessionID();
+
+ if (sysFeatures == null) {
+ try {
+ var data = JSON.parse(window.sessionStorage.getItem('sysFeatures'));
+
+ if (this.isObject(data) &amp;&amp; this.isObject(data[sessionid]))
+ sysFeatures = data[sessionid];
+ }
+ catch (e) {}
+ }
+
+ if (!this.isObject(sysFeatures)) {
+ sysFeatures = classes.rpc.declare({
+ object: 'luci',
+ method: 'getFeatures',
+ expect: { '': {} }
+ })().then(function(features) {
+ try {
+ var data = {};
+ data[sessionid] = features;
+
+ window.sessionStorage.setItem('sysFeatures', JSON.stringify(data));
+ }
+ catch (e) {}
+
+ sysFeatures = features;
+
+ return features;
+ });
+ }
+
+ return Promise.resolve(sysFeatures);
+ },
+
+ /**
+ * Test whether a particular system feature is available, such as
+ * hostapd SAE support or an installed firewall. The features are
+ * queried once at the beginning of the LuCI session and cached in
+ * `SessionStorage` throughout the lifetime of the associated tab or
+ * browser window.
+ *
+ * @instance
+ * @memberof LuCI
+ *
+ * @param {string} feature
+ * The feature to test. For detailed list of known feature flags,
+ * see `/modules/luci-base/root/usr/libexec/rpcd/luci`.
+ *
+ * @param {string} [subfeature]
+ * Some feature classes like `hostapd` provide sub-feature flags,
+ * such as `sae` or `11w` support. The `subfeature` argument can
+ * be used to query these.
+ *
+ * @return {boolean|null}
+ * Return `true` if the queried feature (and sub-feature) is available
+ * or `false` if the requested feature isn't present or known.
+ * Return `null` when a sub-feature was queried for a feature which
+ * has no sub-features.
+ */
+ hasSystemFeature: function() {
+ var ft = sysFeatures[arguments[0]];
+
+ if (arguments.length == 2)
+ return this.isObject(ft) ? ft[arguments[1]] : null;
+
+ return (ft != null &amp;&amp; ft != false);
+ },
+
+ /* private */
+ notifySessionExpiry: function() {
+ Poll.stop();
+
+ L.ui.showModal(_('Session expired'), [
+ E('div', { class: 'alert-message warning' },
+ _('A new login is required since the authentication session expired.')),
+ E('div', { class: 'right' },
+ E('div', {
+ class: 'btn primary',
+ click: function() {
+ var loc = window.location;
+ window.location = loc.protocol + '//' + loc.host + loc.pathname + loc.search;
+ }
+ }, _('To login…')))
+ ]);
+
+ L.raise('SessionError', 'Login session is expired');
+ },
+
+ /* private */
+ setupDOM: function(res) {
+ var domEv = res[0],
+ uiClass = res[1],
+ rpcClass = res[2],
+ formClass = res[3],
+ rpcBaseURL = res[4];
+
+ rpcClass.setBaseURL(rpcBaseURL);
+
+ rpcClass.addInterceptor(function(msg, req) {
+ if (!L.isObject(msg) || !L.isObject(msg.error) || msg.error.code != -32002)
+ return;
+
+ if (!L.isObject(req) || (req.object == 'session' &amp;&amp; req.method == 'access'))
+ return;
+
+ return rpcClass.declare({
+ 'object': 'session',
+ 'method': 'access',
+ 'params': [ 'scope', 'object', 'function' ],
+ 'expect': { access: true }
+ })('uci', 'luci', 'read').catch(L.notifySessionExpiry);
+ });
+
+ Request.addInterceptor(function(res) {
+ var isDenied = false;
+
+ if (res.status == 403 &amp;&amp; res.headers.get('X-LuCI-Login-Required') == 'yes')
+ isDenied = true;
+
+ if (!isDenied)
+ return;
+
+ L.notifySessionExpiry();
+ });
+
+ return this.probeSystemFeatures().finally(this.initDOM);
+ },
+
+ /* private */
+ initDOM: function() {
+ originalCBIInit();
+ Poll.start();
+ document.dispatchEvent(new CustomEvent('luci-loaded'));
+ },
+
+ /**
+ * The `env` object holds environment settings used by LuCI, such
+ * as request timeouts, base URLs etc.
+ *
+ * @instance
+ * @memberof LuCI
+ */
+ env: {},
+
+ /**
+ * Construct a relative URL path from the given prefix and parts.
+ * The resulting URL is guaranteed to only contain the characters
+ * `a-z`, `A-Z`, `0-9`, `_`, `.`, `%`, `,`, `;`, and `-` as well
+ * as `/` for the path separator.
+ *
+ * @instance
+ * @memberof LuCI
+ *
+ * @param {string} [prefix]
+ * The prefix to join the given parts with. If the `prefix` is
+ * omitted, it defaults to an empty string.
+ *
+ * @param {string[]} [parts]
+ * An array of parts to join into an URL path. Parts may contain
+ * slashes and any of the other characters mentioned above.
+ *
+ * @return {string}
+ * Return the joined URL path.
+ */
+ path: function(prefix, parts) {
+ var url = [ prefix || '' ];
+
+ for (var i = 0; i &lt; parts.length; i++)
+ if (/^(?:[a-zA-Z0-9_.%,;-]+\/)*[a-zA-Z0-9_.%,;-]+$/.test(parts[i]))
+ url.push('/', parts[i]);
+
+ if (url.length === 1)
+ url.push('/');
+
+ return url.join('');
+ },
+
+ /**
+ * Construct an URL pathrelative to the script path of the server
+ * side LuCI application (usually `/cgi-bin/luci`).
+ *
+ * The resulting URL is guaranteed to only contain the characters
+ * `a-z`, `A-Z`, `0-9`, `_`, `.`, `%`, `,`, `;`, and `-` as well
+ * as `/` for the path separator.
+ *
+ * @instance
+ * @memberof LuCI
+ *
+ * @param {string[]} [parts]
+ * An array of parts to join into an URL path. Parts may contain
+ * slashes and any of the other characters mentioned above.
+ *
+ * @return {string}
+ * Returns the resulting URL path.
+ */
+ url: function() {
+ return this.path(this.env.scriptname, arguments);
+ },
+
+ /**
+ * Construct an URL path relative to the global static resource path
+ * of the LuCI ui (usually `/luci-static/resources`).
+ *
+ * The resulting URL is guaranteed to only contain the characters
+ * `a-z`, `A-Z`, `0-9`, `_`, `.`, `%`, `,`, `;`, and `-` as well
+ * as `/` for the path separator.
+ *
+ * @instance
+ * @memberof LuCI
+ *
+ * @param {string[]} [parts]
+ * An array of parts to join into an URL path. Parts may contain
+ * slashes and any of the other characters mentioned above.
+ *
+ * @return {string}
+ * Returns the resulting URL path.
+ */
+ resource: function() {
+ return this.path(this.env.resource, arguments);
+ },
+
+ /**
+ * Return the complete URL path to the current view.
+ *
+ * @instance
+ * @memberof LuCI
+ *
+ * @return {string}
+ * Returns the URL path to the current view.
+ */
+ location: function() {
+ return this.path(this.env.scriptname, this.env.requestpath);
+ },
+
+
+ /**
+ * Tests whether the passed argument is a JavaScript object.
+ * This function is meant to be an object counterpart to the
+ * standard `Array.isArray()` function.
+ *
+ * @instance
+ * @memberof LuCI
+ *
+ * @param {*} [val]
+ * The value to test
+ *
+ * @return {boolean}
+ * Returns `true` if the given value is of type object and
+ * not `null`, else returns `false`.
+ */
+ isObject: function(val) {
+ return (val != null &amp;&amp; typeof(val) == 'object');
+ },
+
+ /**
+ * Return an array of sorted object keys, optionally sorted by
+ * a different key or a different sorting mode.
+ *
+ * @instance
+ * @memberof LuCI
+ *
+ * @param {object} obj
+ * The object to extract the keys from. If the given value is
+ * not an object, the function will return an empty array.
+ *
+ * @param {string} [key]
+ * Specifies the key to order by. This is mainly useful for
+ * nested objects of objects or objects of arrays when sorting
+ * shall not be performed by the primary object keys but by
+ * some other key pointing to a value within the nested values.
+ *
+ * @param {string} [sortmode]
+ * May be either `addr` or `num` to override the natural
+ * lexicographic sorting with a sorting suitable for IP/MAC style
+ * addresses or numeric values respectively.
+ *
+ * @return {string[]}
+ * Returns an array containing the sorted keys of the given object.
+ */
+ sortedKeys: function(obj, key, sortmode) {
+ if (obj == null || typeof(obj) != 'object')
+ return [];
+
+ return Object.keys(obj).map(function(e) {
+ var v = (key != null) ? obj[e][key] : e;
+
+ switch (sortmode) {
+ case 'addr':
+ v = (v != null) ? v.replace(/(?:^|[.:])([0-9a-fA-F]{1,4})/g,
+ function(m0, m1) { return ('000' + m1.toLowerCase()).substr(-4) }) : null;
+ break;
+
+ case 'num':
+ v = (v != null) ? +v : null;
+ break;
+ }
+
+ return [ e, v ];
+ }).filter(function(e) {
+ return (e[1] != null);
+ }).sort(function(a, b) {
+ return (a[1] > b[1]);
+ }).map(function(e) {
+ return e[0];
+ });
+ },
+
+ /**
+ * Converts the given value to an array. If the given value is of
+ * type array, it is returned as-is, values of type object are
+ * returned as one-element array containing the object, empty
+ * strings and `null` values are returned as empty array, all other
+ * values are converted using `String()`, trimmed, split on white
+ * space and returned as array.
+ *
+ * @instance
+ * @memberof LuCI
+ *
+ * @param {*} val
+ * The value to convert into an array.
+ *
+ * @return {Array&lt;*>}
+ * Returns the resulting array.
+ */
+ toArray: function(val) {
+ if (val == null)
+ return [];
+ else if (Array.isArray(val))
+ return val;
+ else if (typeof(val) == 'object')
+ return [ val ];
+
+ var s = String(val).trim();
+
+ if (s == '')
+ return [];
+
+ return s.split(/\s+/);
+ },
+
+ /**
+ * Returns a promise resolving with either the given value or or with
+ * the given default in case the input value is a rejecting promise.
+ *
+ * @instance
+ * @memberof LuCI
+ *
+ * @param {*} value
+ * The value to resolve the promise with.
+ *
+ * @param {*} defvalue
+ * The default value to resolve the promise with in case the given
+ * input value is a rejecting promise.
+ *
+ * @returns {Promise&lt;*>}
+ * Returns a new promise resolving either to the given input value or
+ * to the given default value on error.
+ */
+ resolveDefault: function(value, defvalue) {
+ return Promise.resolve(value).catch(function() { return defvalue });
+ },
+
+ /**
+ * The request callback function is invoked whenever an HTTP
+ * reply to a request made using the `L.get()`, `L.post()` or
+ * `L.poll()` function is timed out or received successfully.
+ *
+ * @instance
+ * @memberof LuCI
+ *
+ * @callback LuCI.requestCallbackFn
+ * @param {XMLHTTPRequest} xhr
+ * The XMLHTTPRequest instance used to make the request.
+ *
+ * @param {*} data
+ * The response JSON if the response could be parsed as such,
+ * else `null`.
+ *
+ * @param {number} duration
+ * The total duration of the request in milliseconds.
+ */
+
+ /**
+ * Issues a GET request to the given url and invokes the specified
+ * callback function. The function is a wrapper around
+ * {@link LuCI.Request#request Request.request()}.
+ *
+ * @deprecated
+ * @instance
+ * @memberof LuCI
+ *
+ * @param {string} url
+ * The URL to request.
+ *
+ * @param {Object&lt;string, string>} [args]
+ * Additional query string arguments to append to the URL.
+ *
+ * @param {LuCI.requestCallbackFn} cb
+ * The callback function to invoke when the request finishes.
+ *
+ * @return {Promise&lt;null>}
+ * Returns a promise resolving to `null` when concluded.
+ */
+ get: function(url, args, cb) {
+ return this.poll(null, url, args, cb, false);
+ },
+
+ /**
+ * Issues a POST request to the given url and invokes the specified
+ * callback function. The function is a wrapper around
+ * {@link LuCI.Request#request Request.request()}. The request is
+ * sent using `application/x-www-form-urlencoded` encoding and will
+ * contain a field `token` with the current value of `LuCI.env.token`
+ * by default.
+ *
+ * @deprecated
+ * @instance
+ * @memberof LuCI
+ *
+ * @param {string} url
+ * The URL to request.
+ *
+ * @param {Object&lt;string, string>} [args]
+ * Additional post arguments to append to the request body.
+ *
+ * @param {LuCI.requestCallbackFn} cb
+ * The callback function to invoke when the request finishes.
+ *
+ * @return {Promise&lt;null>}
+ * Returns a promise resolving to `null` when concluded.
+ */
+ post: function(url, args, cb) {
+ return this.poll(null, url, args, cb, true);
+ },
+
+ /**
+ * Register a polling HTTP request that invokes the specified
+ * callback function. The function is a wrapper around
+ * {@link LuCI.Request.poll#add Request.poll.add()}.
+ *
+ * @deprecated
+ * @instance
+ * @memberof LuCI
+ *
+ * @param {number} interval
+ * The poll interval to use. If set to a value less than or equal
+ * to `0`, it will default to the global poll interval configured
+ * in `LuCI.env.pollinterval`.
+ *
+ * @param {string} url
+ * The URL to request.
+ *
+ * @param {Object&lt;string, string>} [args]
+ * Specifies additional arguments for the request. For GET requests,
+ * the arguments are appended to the URL as query string, for POST
+ * requests, they'll be added to the request body.
+ *
+ * @param {LuCI.requestCallbackFn} cb
+ * The callback function to invoke whenever a request finishes.
+ *
+ * @param {boolean} [post=false]
+ * When set to `false` or not specified, poll requests will be made
+ * using the GET method. When set to `true`, POST requests will be
+ * issued. In case of POST requests, the request body will contain
+ * an argument `token` with the current value of `LuCI.env.token` by
+ * default, regardless of the parameters specified with `args`.
+ *
+ * @return {function}
+ * Returns the internally created function that has been passed to
+ * {@link LuCI.Request.poll#add Request.poll.add()}. This value can
+ * be passed to {@link LuCI.Poll.remove Poll.remove()} to remove the
+ * polling request.
+ */
+ poll: function(interval, url, args, cb, post) {
+ if (interval !== null &amp;&amp; interval &lt;= 0)
+ interval = this.env.pollinterval;
+
+ var data = post ? { token: this.env.token } : null,
+ method = post ? 'POST' : 'GET';
+
+ if (!/^(?:\/|\S+:\/\/)/.test(url))
+ url = this.url(url);
+
+ if (args != null)
+ data = Object.assign(data || {}, args);
+
+ if (interval !== null)
+ return Request.poll.add(interval, url, { method: method, query: data }, cb);
+ else
+ return Request.request(url, { method: method, query: data })
+ .then(function(res) {
+ var json = null;
+ if (/^application\/json\b/.test(res.headers.get('Content-Type')))
+ try { json = res.json() } catch(e) {}
+ cb(res.xhr, json, res.duration);
+ });
+ },
+
+ /**
+ * Deprecated wrapper around {@link LuCI.Poll.remove Poll.remove()}.
+ *
+ * @deprecated
+ * @instance
+ * @memberof LuCI
+ *
+ * @param {function} entry
+ * The polling function to remove.
+ *
+ * @return {boolean}
+ * Returns `true` when the function has been removed or `false` if
+ * it could not be found.
+ */
+ stop: function(entry) { return Poll.remove(entry) },
+
+ /**
+ * Deprecated wrapper around {@link LuCI.Poll.stop Poll.stop()}.
+ *
+ * @deprecated
+ * @instance
+ * @memberof LuCI
+ *
+ * @return {boolean}
+ * Returns `true` when the polling loop has been stopped or `false`
+ * when it didn't run to begin with.
+ */
+ halt: function() { return Poll.stop() },
+
+ /**
+ * Deprecated wrapper around {@link LuCI.Poll.start Poll.start()}.
+ *
+ * @deprecated
+ * @instance
+ * @memberof LuCI
+ *
+ * @return {boolean}
+ * Returns `true` when the polling loop has been started or `false`
+ * when it was already running.
+ */
+ run: function() { return Poll.start() },
+
+
+ /**
+ * @class
+ * @memberof LuCI
+ * @hideconstructor
+ * @classdesc
+ *
+ * The `dom` class provides convenience method for creating and
+ * manipulating DOM elements.
+ */
+ dom: Class.singleton(/* @lends LuCI.dom.prototype */ {
+ __name__: 'LuCI.DOM',
+
+ /**
+ * Tests whether the given argument is a valid DOM `Node`.
+ *
+ * @instance
+ * @memberof LuCI.dom
+ * @param {*} e
+ * The value to test.
+ *
+ * @returns {boolean}
+ * Returns `true` if the value is a DOM `Node`, else `false`.
+ */
+ elem: function(e) {
+ return (e != null &amp;&amp; typeof(e) == 'object' &amp;&amp; 'nodeType' in e);
+ },
+
+ /**
+ * Parses a given string as HTML and returns the first child node.
+ *
+ * @instance
+ * @memberof LuCI.dom
+ * @param {string} s
+ * A string containing an HTML fragment to parse. Note that only
+ * the first result of the resulting structure is returned, so an
+ * input value of `&lt;div>foo&lt;/div> &lt;div>bar&lt;/div>` will only return
+ * the first `div` element node.
+ *
+ * @returns {Node}
+ * Returns the first DOM `Node` extracted from the HTML fragment or
+ * `null` on parsing failures or if no element could be found.
+ */
+ parse: function(s) {
+ var elem;
+
+ try {
+ domParser = domParser || new DOMParser();
+ elem = domParser.parseFromString(s, 'text/html').body.firstChild;
+ }
+ catch(e) {}
+
+ if (!elem) {
+ try {
+ dummyElem = dummyElem || document.createElement('div');
+ dummyElem.innerHTML = s;
+ elem = dummyElem.firstChild;
+ }
+ catch (e) {}
+ }
+
+ return elem || null;
+ },
+
+ /**
+ * Tests whether a given `Node` matches the given query selector.
+ *
+ * This function is a convenience wrapper around the standard
+ * `Node.matches("selector")` function with the added benefit that
+ * the `node` argument may be a non-`Node` value, in which case
+ * this function simply returns `false`.
+ *
+ * @instance
+ * @memberof LuCI.dom
+ * @param {*} node
+ * The `Node` argument to test the selector against.
+ *
+ * @param {string} [selector]
+ * The query selector expression to test against the given node.
+ *
+ * @returns {boolean}
+ * Returns `true` if the given node matches the specified selector
+ * or `false` when the node argument is no valid DOM `Node` or the
+ * selector didn't match.
+ */
+ matches: function(node, selector) {
+ var m = this.elem(node) ? node.matches || node.msMatchesSelector : null;
+ return m ? m.call(node, selector) : false;
+ },
+
+ /**
+ * Returns the closest parent node that matches the given query
+ * selector expression.
+ *
+ * This function is a convenience wrapper around the standard
+ * `Node.closest("selector")` function with the added benefit that
+ * the `node` argument may be a non-`Node` value, in which case
+ * this function simply returns `null`.
+ *
+ * @instance
+ * @memberof LuCI.dom
+ * @param {*} node
+ * The `Node` argument to find the closest parent for.
+ *
+ * @param {string} [selector]
+ * The query selector expression to test against each parent.
+ *
+ * @returns {Node|null}
+ * Returns the closest parent node matching the selector or
+ * `null` when the node argument is no valid DOM `Node` or the
+ * selector didn't match any parent.
+ */
+ parent: function(node, selector) {
+ if (this.elem(node) &amp;&amp; node.closest)
+ return node.closest(selector);
+
+ while (this.elem(node))
+ if (this.matches(node, selector))
+ return node;
+ else
+ node = node.parentNode;
+
+ return null;
+ },
+
+ /**
+ * Appends the given children data to the given node.
+ *
+ * @instance
+ * @memberof LuCI.dom
+ * @param {*} node
+ * The `Node` argument to append the children to.
+ *
+ * @param {*} [children]
+ * The childrens to append to the given node.
+ *
+ * When `children` is an array, then each item of the array
+ * will be either appended as child element or text node,
+ * depending on whether the item is a DOM `Node` instance or
+ * some other non-`null` value. Non-`Node`, non-`null` values
+ * will be converted to strings first before being passed as
+ * argument to `createTextNode()`.
+ *
+ * When `children` is a function, it will be invoked with
+ * the passed `node` argument as sole parameter and the `append`
+ * function will be invoked again, with the given `node` argument
+ * as first and the return value of the `children` function as
+ * second parameter.
+ *
+ * When `children` is is a DOM `Node` instance, it will be
+ * appended to the given `node`.
+ *
+ * When `children` is any other non-`null` value, it will be
+ * converted to a string and appened to the `innerHTML` property
+ * of the given `node`.
+ *
+ * @returns {Node|null}
+ * Returns the last children `Node` appended to the node or `null`
+ * if either the `node` argument was no valid DOM `node` or if the
+ * `children` was `null` or didn't result in further DOM nodes.
+ */
+ append: function(node, children) {
+ if (!this.elem(node))
+ return null;
+
+ if (Array.isArray(children)) {
+ for (var i = 0; i &lt; children.length; i++)
+ if (this.elem(children[i]))
+ node.appendChild(children[i]);
+ else if (children !== null &amp;&amp; children !== undefined)
+ node.appendChild(document.createTextNode('' + children[i]));
+
+ return node.lastChild;
+ }
+ else if (typeof(children) === 'function') {
+ return this.append(node, children(node));
+ }
+ else if (this.elem(children)) {
+ return node.appendChild(children);
+ }
+ else if (children !== null &amp;&amp; children !== undefined) {
+ node.innerHTML = '' + children;
+ return node.lastChild;
+ }
+
+ return null;
+ },
+
+ /**
+ * Replaces the content of the given node with the given children.
+ *
+ * This function first removes any children of the given DOM
+ * `Node` and then adds the given given children following the
+ * rules outlined below.
+ *
+ * @instance
+ * @memberof LuCI.dom
+ * @param {*} node
+ * The `Node` argument to replace the children of.
+ *
+ * @param {*} [children]
+ * The childrens to replace into the given node.
+ *
+ * When `children` is an array, then each item of the array
+ * will be either appended as child element or text node,
+ * depending on whether the item is a DOM `Node` instance or
+ * some other non-`null` value. Non-`Node`, non-`null` values
+ * will be converted to strings first before being passed as
+ * argument to `createTextNode()`.
+ *
+ * When `children` is a function, it will be invoked with
+ * the passed `node` argument as sole parameter and the `append`
+ * function will be invoked again, with the given `node` argument
+ * as first and the return value of the `children` function as
+ * second parameter.
+ *
+ * When `children` is is a DOM `Node` instance, it will be
+ * appended to the given `node`.
+ *
+ * When `children` is any other non-`null` value, it will be
+ * converted to a string and appened to the `innerHTML` property
+ * of the given `node`.
+ *
+ * @returns {Node|null}
+ * Returns the last children `Node` appended to the node or `null`
+ * if either the `node` argument was no valid DOM `node` or if the
+ * `children` was `null` or didn't result in further DOM nodes.
+ */
+ content: function(node, children) {
+ if (!this.elem(node))
+ return null;
+
+ var dataNodes = node.querySelectorAll('[data-idref]');
+
+ for (var i = 0; i &lt; dataNodes.length; i++)
+ delete this.registry[dataNodes[i].getAttribute('data-idref')];
+
+ while (node.firstChild)
+ node.removeChild(node.firstChild);
+
+ return this.append(node, children);
+ },
+
+ /**
+ * Sets attributes or registers event listeners on element nodes.
+ *
+ * @instance
+ * @memberof LuCI.dom
+ * @param {*} node
+ * The `Node` argument to set the attributes or add the event
+ * listeners for. When the given `node` value is not a valid
+ * DOM `Node`, the function returns and does nothing.
+ *
+ * @param {string|Object&lt;string, *>} key
+ * Specifies either the attribute or event handler name to use,
+ * or an object containing multiple key, value pairs which are
+ * each added to the node as either attribute or event handler,
+ * depending on the respective value.
+ *
+ * @param {*} [val]
+ * Specifies the attribute value or event handler function to add.
+ * If the `key` parameter is an `Object`, this parameter will be
+ * ignored.
+ *
+ * When `val` is of type function, it will be registered as event
+ * handler on the given `node` with the `key` parameter being the
+ * event name.
+ *
+ * When `val` is of type object, it will be serialized as JSON and
+ * added as attribute to the given `node`, using the given `key`
+ * as attribute name.
+ *
+ * When `val` is of any other type, it will be added as attribute
+ * to the given `node` as-is, with the underlying `setAttribute()`
+ * call implicitely turning it into a string.
+ */
+ attr: function(node, key, val) {
+ if (!this.elem(node))
+ return null;
+
+ var attr = null;
+
+ if (typeof(key) === 'object' &amp;&amp; key !== null)
+ attr = key;
+ else if (typeof(key) === 'string')
+ attr = {}, attr[key] = val;
+
+ for (key in attr) {
+ if (!attr.hasOwnProperty(key) || attr[key] == null)
+ continue;
+
+ switch (typeof(attr[key])) {
+ case 'function':
+ node.addEventListener(key, attr[key]);
+ break;
+
+ case 'object':
+ node.setAttribute(key, JSON.stringify(attr[key]));
+ break;
+
+ default:
+ node.setAttribute(key, attr[key]);
+ }
+ }
+ },
+
+ /**
+ * Creates a new DOM `Node` from the given `html`, `attr` and
+ * `data` parameters.
+ *
+ * This function has multiple signatures, it can be either invoked
+ * in the form `create(html[, attr[, data]])` or in the form
+ * `create(html[, data])`. The used variant is determined from the
+ * type of the second argument.
+ *
+ * @instance
+ * @memberof LuCI.dom
+ * @param {*} html
+ * Describes the node to create.
+ *
+ * When the value of `html` is of type array, a `DocumentFragment`
+ * node is created and each item of the array is first converted
+ * to a DOM `Node` by passing it through `create()` and then added
+ * as child to the fragment.
+ *
+ * When the value of `html` is a DOM `Node` instance, no new
+ * element will be created but the node will be used as-is.
+ *
+ * When the value of `html` is a string starting with `&lt;`, it will
+ * be passed to `dom.parse()` and the resulting value is used.
+ *
+ * When the value of `html` is any other string, it will be passed
+ * to `document.createElement()` for creating a new DOM `Node` of
+ * the given name.
+ *
+ * @param {Object&lt;string, *>} [attr]
+ * Specifies an Object of key, value pairs to set as attributes
+ * or event handlers on the created node. Refer to
+ * {@link LuCI.dom#attr dom.attr()} for details.
+ *
+ * @param {*} [data]
+ * Specifies children to append to the newly created element.
+ * Refer to {@link LuCI.dom#append dom.append()} for details.
+ *
+ * @throws {InvalidCharacterError}
+ * Throws an `InvalidCharacterError` when the given `html`
+ * argument contained malformed markup (such as not escaped
+ * `&amp;` characters in XHTML mode) or when the given node name
+ * in `html` contains characters which are not legal in DOM
+ * element names, such as spaces.
+ *
+ * @returns {Node}
+ * Returns the newly created `Node`.
+ */
+ create: function() {
+ var html = arguments[0],
+ attr = arguments[1],
+ data = arguments[2],
+ elem;
+
+ if (!(attr instanceof Object) || Array.isArray(attr))
+ data = attr, attr = null;
+
+ if (Array.isArray(html)) {
+ elem = document.createDocumentFragment();
+ for (var i = 0; i &lt; html.length; i++)
+ elem.appendChild(this.create(html[i]));
+ }
+ else if (this.elem(html)) {
+ elem = html;
+ }
+ else if (html.charCodeAt(0) === 60) {
+ elem = this.parse(html);
+ }
+ else {
+ elem = document.createElement(html);
+ }
+
+ if (!elem)
+ return null;
+
+ this.attr(elem, attr);
+ this.append(elem, data);
+
+ return elem;
+ },
+
+ registry: {},
+
+ /**
+ * Attaches or detaches arbitrary data to and from a DOM `Node`.
+ *
+ * This function is useful to attach non-string values or runtime
+ * data that is not serializable to DOM nodes. To decouple data
+ * from the DOM, values are not added directly to nodes, but
+ * inserted into a registry instead which is then referenced by a
+ * string key stored as `data-idref` attribute in the node.
+ *
+ * This function has multiple signatures and is sensitive to the
+ * number of arguments passed to it.
+ *
+ * - `dom.data(node)` -
+ * Fetches all data associated with the given node.
+ * - `dom.data(node, key)` -
+ * Fetches a specific key associated with the given node.
+ * - `dom.data(node, key, val)` -
+ * Sets a specific key to the given value associated with the
+ * given node.
+ * - `dom.data(node, null)` -
+ * Clears any data associated with the node.
+ * - `dom.data(node, key, null)` -
+ * Clears the given key associated with the node.
+ *
+ * @instance
+ * @memberof LuCI.dom
+ * @param {Node} node
+ * The DOM `Node` instance to set or retrieve the data for.
+ *
+ * @param {string|null} [key]
+ * This is either a string specifying the key to retrieve, or
+ * `null` to unset the entire node data.
+ *
+ * @param {*|null} [val]
+ * This is either a non-`null` value to set for a given key or
+ * `null` to remove the given `key` from the specified node.
+ *
+ * @returns {*}
+ * Returns the get or set value, or `null` when no value could
+ * be found.
+ */
+ data: function(node, key, val) {
+ var id = node.getAttribute('data-idref');
+
+ /* clear all data */
+ if (arguments.length > 1 &amp;&amp; key == null) {
+ if (id != null) {
+ node.removeAttribute('data-idref');
+ val = this.registry[id]
+ delete this.registry[id];
+ return val;
+ }
+
+ return null;
+ }
+
+ /* clear a key */
+ else if (arguments.length > 2 &amp;&amp; key != null &amp;&amp; val == null) {
+ if (id != null) {
+ val = this.registry[id][key];
+ delete this.registry[id][key];
+ return val;
+ }
+
+ return null;
+ }
+
+ /* set a key */
+ else if (arguments.length > 2 &amp;&amp; key != null &amp;&amp; val != null) {
+ if (id == null) {
+ do { id = Math.floor(Math.random() * 0xffffffff).toString(16) }
+ while (this.registry.hasOwnProperty(id));
+
+ node.setAttribute('data-idref', id);
+ this.registry[id] = {};
+ }
+
+ return (this.registry[id][key] = val);
+ }
+
+ /* get all data */
+ else if (arguments.length == 1) {
+ if (id != null)
+ return this.registry[id];
+
+ return null;
+ }
+
+ /* get a key */
+ else if (arguments.length == 2) {
+ if (id != null)
+ return this.registry[id][key];
+ }
+
+ return null;
+ },
+
+ /**
+ * Binds the given class instance ot the specified DOM `Node`.
+ *
+ * This function uses the `dom.data()` facility to attach the
+ * passed instance of a Class to a node. This is needed for
+ * complex widget elements or similar where the corresponding
+ * class instance responsible for the element must be retrieved
+ * from DOM nodes obtained by `querySelector()` or similar means.
+ *
+ * @instance
+ * @memberof LuCI.dom
+ * @param {Node} node
+ * The DOM `Node` instance to bind the class to.
+ *
+ * @param {Class} inst
+ * The Class instance to bind to the node.
+ *
+ * @throws {TypeError}
+ * Throws a `TypeError` when the given instance argument isn't
+ * a valid Class instance.
+ *
+ * @returns {Class}
+ * Returns the bound class instance.
+ */
+ bindClassInstance: function(node, inst) {
+ if (!(inst instanceof Class))
+ L.error('TypeError', 'Argument must be a class instance');
+
+ return this.data(node, '_class', inst);
+ },
+
+ /**
+ * Finds a bound class instance on the given node itself or the
+ * first bound instance on its closest parent node.
+ *
+ * @instance
+ * @memberof LuCI.dom
+ * @param {Node} node
+ * The DOM `Node` instance to start from.
+ *
+ * @returns {Class|null}
+ * Returns the founds class instance if any or `null` if no bound
+ * class could be found on the node itself or any of its parents.
+ */
+ findClassInstance: function(node) {
+ var inst = null;
+
+ do {
+ inst = this.data(node, '_class');
+ node = node.parentNode;
+ }
+ while (!(inst instanceof Class) &amp;&amp; node != null);
+
+ return inst;
+ },
+
+ /**
+ * Finds a bound class instance on the given node itself or the
+ * first bound instance on its closest parent node and invokes
+ * the specified method name on the found class instance.
+ *
+ * @instance
+ * @memberof LuCI.dom
+ * @param {Node} node
+ * The DOM `Node` instance to start from.
+ *
+ * @param {string} method
+ * The name of the method to invoke on the found class instance.
+ *
+ * @param {...*} params
+ * Additional arguments to pass to the invoked method as-is.
+ *
+ * @returns {*|null}
+ * Returns the return value of the invoked method if a class
+ * instance and method has been found. Returns `null` if either
+ * no bound class instance could be found, or if the found
+ * instance didn't have the requested `method`.
+ */
+ callClassMethod: function(node, method /*, ... */) {
+ var inst = this.findClassInstance(node);
+
+ if (inst == null || typeof(inst[method]) != 'function')
+ return null;
+
+ return inst[method].apply(inst, inst.varargs(arguments, 2));
+ },
+
+ /**
+ * The ignore callback function is invoked by `isEmpty()` for each
+ * child node to decide whether to ignore a child node or not.
+ *
+ * When this function returns `false`, the node passed to it is
+ * ignored, else not.
+ *
+ * @callback LuCI.dom~ignoreCallbackFn
+ * @param {Node} node
+ * The child node to test.
+ *
+ * @returns {boolean}
+ * Boolean indicating whether to ignore the node or not.
+ */
+
+ /**
+ * Tests whether a given DOM `Node` instance is empty or appears
+ * empty.
+ *
+ * Any element child nodes which have the CSS class `hidden` set
+ * or for which the optionally passed `ignoreFn` callback function
+ * returns `false` are ignored.
+ *
+ * @instance
+ * @memberof LuCI.dom
+ * @param {Node} node
+ * The DOM `Node` instance to test.
+ *
+ * @param {LuCI.dom~ignoreCallbackFn} [ignoreFn]
+ * Specifies an optional function which is invoked for each child
+ * node to decide whether the child node should be ignored or not.
+ *
+ * @returns {boolean}
+ * Returns `true` if the node does not have any children or if
+ * any children node either has a `hidden` CSS class or a `false`
+ * result when testing it using the given `ignoreFn`.
+ */
+ isEmpty: function(node, ignoreFn) {
+ for (var child = node.firstElementChild; child != null; child = child.nextElementSibling)
+ if (!child.classList.contains('hidden') &amp;&amp; (!ignoreFn || !ignoreFn(child)))
+ return false;
+
+ return true;
+ }
+ }),
+
+ Poll: Poll,
+ Class: Class,
+ Request: Request,
+
+ /**
+ * @class
+ * @memberof LuCI
+ * @hideconstructor
+ * @classdesc
+ *
+ * The `view` class forms the basis of views and provides a standard
+ * set of methods to inherit from.
+ */
+ view: Class.extend(/* @lends LuCI.view.prototype */ {
+ __name__: 'LuCI.View',
+
+ __init__: function() {
+ var vp = document.getElementById('view');
+
+ L.dom.content(vp, E('div', { 'class': 'spinning' }, _('Loading view…')));
+
+ return Promise.resolve(this.load())
+ .then(L.bind(this.render, this))
+ .then(L.bind(function(nodes) {
+ var vp = document.getElementById('view');
+
+ L.dom.content(vp, nodes);
+ L.dom.append(vp, this.addFooter());
+ }, this)).catch(L.error);
+ },
+
+ /**
+ * The load function is invoked before the view is rendered.
+ *
+ * The invocation of this function is wrapped by
+ * `Promise.resolve()` so it may return Promises if needed.
+ *
+ * The return value of the function (or the resolved values
+ * of the promise returned by it) will be passed as first
+ * argument to `render()`.
+ *
+ * This function is supposed to be overwritten by subclasses,
+ * the default implementation does nothing.
+ *
+ * @instance
+ * @abstract
+ * @memberof LuCI.view
+ *
+ * @returns {*|Promise&lt;*>}
+ * May return any value or a Promise resolving to any value.
+ */
+ load: function() {},
+
+ /**
+ * The render function is invoked after the
+ * {@link LuCI.view#load load()} function and responsible
+ * for setting up the view contents. It must return a DOM
+ * `Node` or `DocumentFragment` holding the contents to
+ * insert into the view area.
+ *
+ * The invocation of this function is wrapped by
+ * `Promise.resolve()` so it may return Promises if needed.
+ *
+ * The return value of the function (or the resolved values
+ * of the promise returned by it) will be inserted into the
+ * main content area using
+ * {@link LuCI.dom#append dom.append()}.
+ *
+ * This function is supposed to be overwritten by subclasses,
+ * the default implementation does nothing.
+ *
+ * @instance
+ * @abstract
+ * @memberof LuCI.view
+ * @param {*|null} load_results
+ * This function will receive the return value of the
+ * {@link LuCI.view#load view.load()} function as first
+ * argument.
+ *
+ * @returns {Node|Promise&lt;Node>}
+ * Should return a DOM `Node` value or a `Promise` resolving
+ * to a `Node` value.
+ */
+ render: function() {},
+
+ /**
+ * The handleSave function is invoked when the user clicks
+ * the `Save` button in the page action footer.
+ *
+ * The default implementation should be sufficient for most
+ * views using {@link form#Map form.Map()} based forms - it
+ * will iterate all forms present in the view and invoke
+ * the {@link form#Map#save Map.save()} method on each form.
+ *
+ * Views not using `Map` instances or requiring other special
+ * logic should overwrite `handleSave()` with a custom
+ * implementation.
+ *
+ * To disable the `Save` page footer button, views extending
+ * this base class should overwrite the `handleSave` function
+ * with `null`.
+ *
+ * The invocation of this function is wrapped by
+ * `Promise.resolve()` so it may return Promises if needed.
+ *
+ * @instance
+ * @memberof LuCI.view
+ * @param {Event} ev
+ * The DOM event that triggered the function.
+ *
+ * @returns {*|Promise&lt;*>}
+ * Any return values of this function are discarded, but
+ * passed through `Promise.resolve()` to ensure that any
+ * returned promise runs to completion before the button
+ * is reenabled.
+ */
+ handleSave: function(ev) {
+ var tasks = [];
+
+ document.getElementById('maincontent')
+ .querySelectorAll('.cbi-map').forEach(function(map) {
+ tasks.push(L.dom.callClassMethod(map, 'save'));
+ });
+
+ return Promise.all(tasks);
+ },
+
+ /**
+ * The handleSaveApply function is invoked when the user clicks
+ * the `Save &amp; Apply` button in the page action footer.
+ *
+ * The default implementation should be sufficient for most
+ * views using {@link form#Map form.Map()} based forms - it
+ * will first invoke
+ * {@link LuCI.view.handleSave view.handleSave()} and then
+ * call {@link ui#changes#apply ui.changes.apply()} to start the
+ * modal config apply and page reload flow.
+ *
+ * Views not using `Map` instances or requiring other special
+ * logic should overwrite `handleSaveApply()` with a custom
+ * implementation.
+ *
+ * To disable the `Save &amp; Apply` page footer button, views
+ * extending this base class should overwrite the
+ * `handleSaveApply` function with `null`.
+ *
+ * The invocation of this function is wrapped by
+ * `Promise.resolve()` so it may return Promises if needed.
+ *
+ * @instance
+ * @memberof LuCI.view
+ * @param {Event} ev
+ * The DOM event that triggered the function.
+ *
+ * @returns {*|Promise&lt;*>}
+ * Any return values of this function are discarded, but
+ * passed through `Promise.resolve()` to ensure that any
+ * returned promise runs to completion before the button
+ * is reenabled.
+ */
+ handleSaveApply: function(ev) {
+ return this.handleSave(ev).then(function() {
+ L.ui.changes.apply(true);
+ });
+ },
+
+ /**
+ * The handleReset function is invoked when the user clicks
+ * the `Reset` button in the page action footer.
+ *
+ * The default implementation should be sufficient for most
+ * views using {@link form#Map form.Map()} based forms - it
+ * will iterate all forms present in the view and invoke
+ * the {@link form#Map#save Map.reset()} method on each form.
+ *
+ * Views not using `Map` instances or requiring other special
+ * logic should overwrite `handleReset()` with a custom
+ * implementation.
+ *
+ * To disable the `Reset` page footer button, views extending
+ * this base class should overwrite the `handleReset` function
+ * with `null`.
+ *
+ * The invocation of this function is wrapped by
+ * `Promise.resolve()` so it may return Promises if needed.
+ *
+ * @instance
+ * @memberof LuCI.view
+ * @param {Event} ev
+ * The DOM event that triggered the function.
+ *
+ * @returns {*|Promise&lt;*>}
+ * Any return values of this function are discarded, but
+ * passed through `Promise.resolve()` to ensure that any
+ * returned promise runs to completion before the button
+ * is reenabled.
+ */
+ handleReset: function(ev) {
+ var tasks = [];
+
+ document.getElementById('maincontent')
+ .querySelectorAll('.cbi-map').forEach(function(map) {
+ tasks.push(L.dom.callClassMethod(map, 'reset'));
+ });
+
+ return Promise.all(tasks);
+ },
+
+ /**
+ * Renders a standard page action footer if any of the
+ * `handleSave()`, `handleSaveApply()` or `handleReset()`
+ * functions are defined.
+ *
+ * The default implementation should be sufficient for most
+ * views - it will render a standard page footer with action
+ * buttons labeled `Save`, `Save &amp; Apply` and `Reset`
+ * triggering the `handleSave()`, `handleSaveApply()` and
+ * `handleReset()` functions respectively.
+ *
+ * When any of these `handle*()` functions is overwritten
+ * with `null` by a view extending this class, the
+ * corresponding button will not be rendered.
+ *
+ * @instance
+ * @memberof LuCI.view
+ * @returns {DocumentFragment}
+ * Returns a `DocumentFragment` containing the footer bar
+ * with buttons for each corresponding `handle*()` action
+ * or an empty `DocumentFragment` if all three `handle*()`
+ * methods are overwritten with `null`.
+ */
+ addFooter: function() {
+ var footer = E([]);
+
+ if (this.handleSaveApply || this.handleSave || this.handleReset) {
+ footer.appendChild(E('div', { 'class': 'cbi-page-actions' }, [
+ this.handleSaveApply ? E('button', {
+ 'class': 'cbi-button cbi-button-apply',
+ 'click': L.ui.createHandlerFn(this, 'handleSaveApply')
+ }, [ _('Save &amp; Apply') ]) : '', ' ',
+ this.handleSave ? E('button', {
+ 'class': 'cbi-button cbi-button-save',
+ 'click': L.ui.createHandlerFn(this, 'handleSave')
+ }, [ _('Save') ]) : '', ' ',
+ this.handleReset ? E('button', {
+ 'class': 'cbi-button cbi-button-reset',
+ 'click': L.ui.createHandlerFn(this, 'handleReset')
+ }, [ _('Reset') ]) : ''
+ ]));
+ }
+
+ return footer;
+ }
+ })
+ });
+
+ /**
+ * @class
+ * @memberof LuCI
+ * @deprecated
+ * @classdesc
+ *
+ * The `LuCI.XHR` class is a legacy compatibility shim for the
+ * functionality formerly provided by `xhr.js`. It is registered as global
+ * `window.XHR` symbol for compatibility with legacy code.
+ *
+ * New code should use {@link LuCI.Request} instead to implement HTTP
+ * request handling.
+ */
+ var XHR = Class.extend(/** @lends LuCI.XHR.prototype */ {
+ __name__: 'LuCI.XHR',
+ __init__: function() {
+ if (window.console &amp;&amp; console.debug)
+ console.debug('Direct use XHR() is deprecated, please use L.Request instead');
+ },
+
+ _response: function(cb, res, json, duration) {
+ if (this.active)
+ cb(res, json, duration);
+ delete this.active;
+ },
+
+ /**
+ * This function is a legacy wrapper around
+ * {@link LuCI#get LuCI.get()}.
+ *
+ * @instance
+ * @deprecated
+ * @memberof LuCI.XHR
+ *
+ * @param {string} url
+ * The URL to request
+ *
+ * @param {Object} [data]
+ * Additional query string data
+ *
+ * @param {LuCI.requestCallbackFn} [callback]
+ * Callback function to invoke on completion
+ *
+ * @param {number} [timeout]
+ * Request timeout to use
+ *
+ * @return {Promise&lt;null>}
+ */
+ get: function(url, data, callback, timeout) {
+ this.active = true;
+ L.get(url, data, this._response.bind(this, callback), timeout);
+ },
+
+ /**
+ * This function is a legacy wrapper around
+ * {@link LuCI#post LuCI.post()}.
+ *
+ * @instance
+ * @deprecated
+ * @memberof LuCI.XHR
+ *
+ * @param {string} url
+ * The URL to request
+ *
+ * @param {Object} [data]
+ * Additional data to append to the request body.
+ *
+ * @param {LuCI.requestCallbackFn} [callback]
+ * Callback function to invoke on completion
+ *
+ * @param {number} [timeout]
+ * Request timeout to use
+ *
+ * @return {Promise&lt;null>}
+ */
+ post: function(url, data, callback, timeout) {
+ this.active = true;
+ L.post(url, data, this._response.bind(this, callback), timeout);
+ },
+
+ /**
+ * Cancels a running request.
+ *
+ * This function does not actually cancel the underlying
+ * `XMLHTTPRequest` request but it sets a flag which prevents the
+ * invocation of the callback function when the request eventually
+ * finishes or timed out.
+ *
+ * @instance
+ * @deprecated
+ * @memberof LuCI.XHR
+ */
+ cancel: function() { delete this.active },
+
+ /**
+ * Checks the running state of the request.
+ *
+ * @instance
+ * @deprecated
+ * @memberof LuCI.XHR
+ *
+ * @returns {boolean}
+ * Returns `true` if the request is still running or `false` if it
+ * already completed.
+ */
+ busy: function() { return (this.active === true) },
+
+ /**
+ * Ignored for backwards compatibility.
+ *
+ * This function does nothing.
+ *
+ * @instance
+ * @deprecated
+ * @memberof LuCI.XHR
+ */
+ abort: function() {},
+
+ /**
+ * Existing for backwards compatibility.
+ *
+ * This function simply throws an `InternalError` when invoked.
+ *
+ * @instance
+ * @deprecated
+ * @memberof LuCI.XHR
+ *
+ * @throws {InternalError}
+ * Throws an `InternalError` with the message `Not implemented`
+ * when invoked.
+ */
+ send_form: function() { L.error('InternalError', 'Not implemented') },
+ });
+
+ XHR.get = function() { return window.L.get.apply(window.L, arguments) };
+ XHR.post = function() { return window.L.post.apply(window.L, arguments) };
+ XHR.poll = function() { return window.L.poll.apply(window.L, arguments) };
+ XHR.stop = Request.poll.remove.bind(Request.poll);
+ XHR.halt = Request.poll.stop.bind(Request.poll);
+ XHR.run = Request.poll.start.bind(Request.poll);
+ XHR.running = Request.poll.active.bind(Request.poll);
+
+ window.XHR = XHR;
+ window.LuCI = LuCI;
+})(window, document);
+</code></pre>
+ </article>
+ </section>
+
+
+
+
+</div>
+
+<nav>
+ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="LuCI.html">LuCI</a></li><li><a href="LuCI.Class.html">Class</a></li><li><a href="LuCI.dom.html">dom</a></li><li><a href="LuCI.fs.html">fs</a></li><li><a href="LuCI.Headers.html">Headers</a></li><li><a href="LuCI.Network.html">Network</a></li><li><a href="LuCI.Network.Device.html">Device</a></li><li><a href="LuCI.Network.Hosts.html">Hosts</a></li><li><a href="LuCI.Network.Protocol.html">Protocol</a></li><li><a href="LuCI.Network.WifiDevice.html">WifiDevice</a></li><li><a href="LuCI.Network.WifiNetwork.html">WifiNetwork</a></li><li><a href="LuCI.Poll.html">Poll</a></li><li><a href="LuCI.Request.html">Request</a></li><li><a href="LuCI.Request.poll.html">poll</a></li><li><a href="LuCI.Response.html">Response</a></li><li><a href="LuCI.rpc.html">rpc</a></li><li><a href="LuCI.uci.html">uci</a></li><li><a href="LuCI.view.html">view</a></li><li><a href="LuCI.XHR.html">XHR</a></li></ul>
+</nav>
+
+<br class="clear">
+
+<footer>
+ Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 3.6.3</a> on Tue Nov 05 2019 09:33:05 GMT+0100 (Central European Standard Time)
+</footer>
+
+<script> prettyPrint(); </script>
+<script src="scripts/linenumber.js"> </script>
+</body>
+</html>
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