src/cm/media/js/lib/yui/yui_3.0.0b1/build/cookie/cookie-debug.js
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     1 /*
       
     2 Copyright (c) 2009, Yahoo! Inc. All rights reserved.
       
     3 Code licensed under the BSD License:
       
     4 http://developer.yahoo.net/yui/license.txt
       
     5 version: 3.0.0b1
       
     6 build: 1163
       
     7 */
       
     8 YUI.add('cookie', function(Y) {
       
     9 
       
    10 /**
       
    11  * Utilities for cookie management
       
    12  * @module cookie
       
    13  */
       
    14 
       
    15     //shortcuts
       
    16     var L       = Y.Lang,
       
    17         O       = Y.Object,
       
    18         NULL    = null,
       
    19         
       
    20         //shortcuts to functions
       
    21         isString    = L.isString,
       
    22         isObject    = L.isObject,
       
    23         isUndefined = L.isUndefined,
       
    24         isFunction  = L.isFunction,
       
    25         encode      = encodeURIComponent,
       
    26         decode      = decodeURIComponent,
       
    27         
       
    28         //shortcut to document
       
    29         doc         = Y.config.doc;
       
    30         
       
    31     /*
       
    32      * Throws an error message.
       
    33      */
       
    34     function error(message){
       
    35         throw new TypeError(message);
       
    36     }        
       
    37     
       
    38     /*
       
    39      * Checks the validity of a cookie name.
       
    40      */
       
    41     function validateCookieName(name){
       
    42         if (!isString(name) || name === ""){
       
    43             error("Cookie name must be a non-empty string.");
       
    44         }               
       
    45     }
       
    46     
       
    47     /*
       
    48      * Checks the validity of a subcookie name.
       
    49      */    
       
    50     function validateSubcookieName(subName){
       
    51         if (!isString(subName) || subName === ""){
       
    52             error("Subcookie name must be a non-empty string.");
       
    53         }    
       
    54     }
       
    55     
       
    56     /**
       
    57      * Cookie utility.
       
    58      * @class Cookie
       
    59      * @static
       
    60      */
       
    61     Y.Cookie = {
       
    62                     
       
    63         //-------------------------------------------------------------------------
       
    64         // Private Methods
       
    65         //-------------------------------------------------------------------------
       
    66         
       
    67         /**
       
    68          * Creates a cookie string that can be assigned into document.cookie.
       
    69          * @param {String} name The name of the cookie.
       
    70          * @param {String} value The value of the cookie.
       
    71          * @param {Boolean} encodeValue True to encode the value, false to leave as-is.
       
    72          * @param {Object} options (Optional) Options for the cookie.
       
    73          * @return {String} The formatted cookie string.
       
    74          * @method _createCookieString
       
    75          * @private
       
    76          * @static
       
    77          */
       
    78         _createCookieString : function (name /*:String*/, value /*:Variant*/, encodeValue /*:Boolean*/, options /*:Object*/) /*:String*/ {
       
    79         
       
    80             options = options || {};
       
    81             
       
    82             var text /*:String*/ = encode(name) + "=" + (encodeValue ? encode(value) : value),
       
    83                 expires = options.expires,
       
    84                 path    = options.path,
       
    85                 domain  = options.domain;
       
    86             
       
    87         
       
    88             if (isObject(options)){
       
    89                 //expiration date
       
    90                 if (expires instanceof Date){
       
    91                     text += "; expires=" + expires.toUTCString();
       
    92                 }
       
    93             
       
    94                 //path
       
    95                 if (isString(path) && path !== ""){
       
    96                     text += "; path=" + path;
       
    97                 }
       
    98         
       
    99                 //domain
       
   100                 if (isString(domain) && domain !== ""){
       
   101                     text += "; domain=" + domain;
       
   102                 }
       
   103                 
       
   104                 //secure
       
   105                 if (options.secure === true){
       
   106                     text += "; secure";
       
   107                 }
       
   108             }
       
   109             
       
   110             return text;
       
   111         },
       
   112         
       
   113         /**
       
   114          * Formats a cookie value for an object containing multiple values.
       
   115          * @param {Object} hash An object of key-value pairs to create a string for.
       
   116          * @return {String} A string suitable for use as a cookie value.
       
   117          * @method _createCookieHashString
       
   118          * @private
       
   119          * @static
       
   120          */
       
   121         _createCookieHashString : function (hash /*:Object*/) /*:String*/ {
       
   122             if (!isObject(hash)){
       
   123                 error("Cookie._createCookieHashString(): Argument must be an object.");
       
   124             }
       
   125             
       
   126             var text /*:Array*/ = [];
       
   127 
       
   128             O.each(hash, function(value, key){
       
   129                 if (!isFunction(value) && !isUndefined(value)){
       
   130                     text.push(encode(key) + "=" + encode(String(value)));
       
   131                 }            
       
   132             });
       
   133             
       
   134             return text.join("&");
       
   135         },
       
   136         
       
   137         /**
       
   138          * Parses a cookie hash string into an object.
       
   139          * @param {String} text The cookie hash string to parse (format: n1=v1&n2=v2).
       
   140          * @return {Object} An object containing entries for each cookie value.
       
   141          * @method _parseCookieHash
       
   142          * @private
       
   143          * @static
       
   144          */
       
   145         _parseCookieHash : function (text) {
       
   146         
       
   147             var hashParts   = text.split("&"),
       
   148                 hashPart    = NULL,
       
   149                 hash        = {};
       
   150             
       
   151             if (text.length){
       
   152                 for (var i=0, len=hashParts.length; i < len; i++){
       
   153                     hashPart = hashParts[i].split("=");
       
   154                     hash[decode(hashPart[0])] = decode(hashPart[1]);
       
   155                 }
       
   156             }
       
   157             
       
   158             return hash;          
       
   159         },
       
   160         
       
   161         /**
       
   162          * Parses a cookie string into an object representing all accessible cookies.
       
   163          * @param {String} text The cookie string to parse.
       
   164          * @param {Boolean} shouldDecode (Optional) Indicates if the cookie values should be decoded or not. Default is true.
       
   165          * @return {Object} An object containing entries for each accessible cookie.
       
   166          * @method _parseCookieString
       
   167          * @private
       
   168          * @static
       
   169          */
       
   170         _parseCookieString : function (text /*:String*/, shouldDecode /*:Boolean*/) /*:Object*/ {
       
   171         
       
   172             var cookies /*:Object*/ = {};        
       
   173             
       
   174             if (isString(text) && text.length > 0) {
       
   175             
       
   176                 var decodeValue = (shouldDecode === false ? function(s){return s;} : decode),  
       
   177                     cookieParts = text.split(/;\s/g),
       
   178                     cookieName  = NULL,
       
   179                     cookieValue = NULL,
       
   180                     cookieNameValue = NULL;
       
   181                 
       
   182                 for (var i=0, len=cookieParts.length; i < len; i++){
       
   183                 
       
   184                     //check for normally-formatted cookie (name-value)
       
   185                     cookieNameValue = cookieParts[i].match(/([^=]+)=/i);
       
   186                     if (cookieNameValue instanceof Array){
       
   187                         try {
       
   188                             cookieName = decode(cookieNameValue[1]);
       
   189                             cookieValue = decodeValue(cookieParts[i].substring(cookieNameValue[1].length+1));
       
   190                         } catch (ex){
       
   191                             //intentionally ignore the cookie - the encoding is wrong
       
   192                         }
       
   193                     } else {
       
   194                         //means the cookie does not have an "=", so treat it as a boolean flag
       
   195                         cookieName = decode(cookieParts[i]);
       
   196                         cookieValue = "";
       
   197                     }
       
   198                     cookies[cookieName] = cookieValue;
       
   199                 }
       
   200 
       
   201             }
       
   202             
       
   203             return cookies;
       
   204         },    
       
   205         
       
   206         //-------------------------------------------------------------------------
       
   207         // Public Methods
       
   208         //-------------------------------------------------------------------------
       
   209     
       
   210         /**
       
   211          * Determines if the cookie with the given name exists. This is useful for
       
   212          * Boolean cookies (those that do not follow the name=value convention).
       
   213          * @param {String} name The name of the cookie to check.
       
   214          * @return {Boolean} True if the cookie exists, false if not.
       
   215          * @method exists
       
   216          * @static
       
   217          */
       
   218         exists: function(name) {
       
   219     
       
   220             validateCookieName(name);   //throws error
       
   221     
       
   222             var cookies = this._parseCookieString(doc.cookie, true);
       
   223             
       
   224             return cookies.hasOwnProperty(name);
       
   225         },    
       
   226         
       
   227         /**
       
   228          * Returns the cookie value for the given name.
       
   229          * @param {String} name The name of the cookie to retrieve.
       
   230          * @param {Function|Object} options (Optional) An object containing one or more
       
   231          *      cookie options: raw (true/false) and converter (a function).
       
   232          *      The converter function is run on the value before returning it. The
       
   233          *      function is not used if the cookie doesn't exist. The function can be
       
   234          *      passed instead of the options object for backwards compatibility. When
       
   235          *      raw is set to true, the cookie value is not URI decoded.
       
   236          * @return {Variant} If no converter is specified, returns a string or null if
       
   237          *      the cookie doesn't exist. If the converter is specified, returns the value
       
   238          *      returned from the converter or null if the cookie doesn't exist.
       
   239          * @method get
       
   240          * @static
       
   241          */
       
   242         get : function (name, options) {
       
   243             
       
   244             validateCookieName(name);   //throws error                        
       
   245             
       
   246             var cookies,
       
   247                 cookie,
       
   248                 converter;
       
   249                 
       
   250             //if options is a function, then it's the converter
       
   251             if (isFunction(options)) {
       
   252                 converter = options;
       
   253                 options = {};
       
   254             } else if (isObject(options)) {
       
   255                 converter = options.converter;
       
   256             } else {
       
   257                 options = {};
       
   258             }
       
   259             
       
   260             cookies = this._parseCookieString(doc.cookie, !options.raw);
       
   261             cookie = cookies[name];
       
   262             
       
   263             //should return null, not undefined if the cookie doesn't exist
       
   264             if (isUndefined(cookie)) {
       
   265                 return NULL;
       
   266             }
       
   267             
       
   268             if (!isFunction(converter)){
       
   269                 return cookie;
       
   270             } else {
       
   271                 return converter(cookie);
       
   272             }
       
   273         },
       
   274         
       
   275         /**
       
   276          * Returns the value of a subcookie.
       
   277          * @param {String} name The name of the cookie to retrieve.
       
   278          * @param {String} subName The name of the subcookie to retrieve.
       
   279          * @param {Function} converter (Optional) A function to run on the value before returning
       
   280          *      it. The function is not used if the cookie doesn't exist.
       
   281          * @return {Variant} If the cookie doesn't exist, null is returned. If the subcookie
       
   282          *      doesn't exist, null if also returned. If no converter is specified and the
       
   283          *      subcookie exists, a string is returned. If a converter is specified and the
       
   284          *      subcookie exists, the value returned from the converter is returned.
       
   285          * @method getSub
       
   286          * @static
       
   287          */
       
   288         getSub : function (name /*:String*/, subName /*:String*/, converter /*:Function*/) /*:Variant*/ {
       
   289           
       
   290             var hash /*:Variant*/ = this.getSubs(name);  
       
   291     
       
   292             if (hash !== NULL) {
       
   293                 
       
   294                 validateSubcookieName(subName);   //throws error
       
   295                 
       
   296                 if (isUndefined(hash[subName])){
       
   297                     return NULL;
       
   298                 }            
       
   299             
       
   300                 if (!isFunction(converter)){
       
   301                     return hash[subName];
       
   302                 } else {
       
   303                     return converter(hash[subName]);
       
   304                 }
       
   305             } else {
       
   306                 return NULL;
       
   307             }
       
   308         
       
   309         },
       
   310         
       
   311         /**
       
   312          * Returns an object containing name-value pairs stored in the cookie with the given name.
       
   313          * @param {String} name The name of the cookie to retrieve.
       
   314          * @return {Object} An object of name-value pairs if the cookie with the given name
       
   315          *      exists, null if it does not.
       
   316          * @method getSubs
       
   317          * @static
       
   318          */
       
   319         getSubs : function (name) {
       
   320             
       
   321             validateCookieName(name);   //throws error
       
   322             
       
   323             var cookies = this._parseCookieString(doc.cookie, false);
       
   324             if (isString(cookies[name])){
       
   325                 return this._parseCookieHash(cookies[name]);
       
   326             }
       
   327             return NULL;
       
   328         },
       
   329         
       
   330         /**
       
   331          * Removes a cookie from the machine by setting its expiration date to
       
   332          * sometime in the past.
       
   333          * @param {String} name The name of the cookie to remove.
       
   334          * @param {Object} options (Optional) An object containing one or more
       
   335          *      cookie options: path (a string), domain (a string), 
       
   336          *      and secure (true/false). The expires option will be overwritten
       
   337          *      by the method.
       
   338          * @return {String} The created cookie string.
       
   339          * @method remove
       
   340          * @static
       
   341          */
       
   342         remove : function (name, options) {
       
   343             
       
   344             validateCookieName(name);   //throws error
       
   345             
       
   346             //set options
       
   347             options = Y.merge(options || {}, {
       
   348                 expires: new Date(0)
       
   349             });
       
   350             
       
   351             //set cookie
       
   352             return this.set(name, "", options);
       
   353         },
       
   354     
       
   355         /**
       
   356          * Removes a sub cookie with a given name.
       
   357          * @param {String} name The name of the cookie in which the subcookie exists.
       
   358          * @param {String} subName The name of the subcookie to remove.
       
   359          * @param {Object} options (Optional) An object containing one or more
       
   360          *      cookie options: path (a string), domain (a string), expires (a Date object),
       
   361          *      removeIfEmpty (true/false), and secure (true/false). This must be the same
       
   362          *      settings as the original subcookie.
       
   363          * @return {String} The created cookie string.
       
   364          * @method removeSub
       
   365          * @static
       
   366          */
       
   367         removeSub : function(name, subName, options) {
       
   368         
       
   369             validateCookieName(name);   //throws error
       
   370             
       
   371             validateSubcookieName(subName);   //throws error
       
   372             
       
   373             options = options || {};
       
   374             
       
   375             //get all subcookies for this cookie
       
   376             var subs = this.getSubs(name);
       
   377             
       
   378             //delete the indicated subcookie
       
   379             if (isObject(subs) && subs.hasOwnProperty(subName)){
       
   380                 delete subs[subName];
       
   381                 
       
   382                 if (!options.removeIfEmpty) {
       
   383                     //reset the cookie
       
   384     
       
   385                     return this.setSubs(name, subs, options);
       
   386                 } else {
       
   387                     //reset the cookie if there are subcookies left, else remove
       
   388                     for (var key in subs){
       
   389                         if (subs.hasOwnProperty(key) && !isFunction(subs[key]) && !isUndefined(subs[key])){
       
   390                             return this.setSubs(name, subs, options);
       
   391                         }
       
   392                     }
       
   393                     
       
   394                     return this.remove(name, options);
       
   395                 }                
       
   396             } else {
       
   397                 return "";
       
   398             }
       
   399             
       
   400         },
       
   401     
       
   402         /**
       
   403          * Sets a cookie with a given name and value.
       
   404          * @param {String} name The name of the cookie to set.
       
   405          * @param {Variant} value The value to set for the cookie.
       
   406          * @param {Object} options (Optional) An object containing one or more
       
   407          *      cookie options: path (a string), domain (a string), expires (a Date object),
       
   408          *      secure (true/false), and raw (true/false). Setting raw to true indicates
       
   409          *      that the cookie should not be URI encoded before being set.
       
   410          * @return {String} The created cookie string.
       
   411          * @method set
       
   412          * @static
       
   413          */
       
   414         set : function (name, value, options) {
       
   415         
       
   416             validateCookieName(name);   //throws error
       
   417             
       
   418             if (isUndefined(value)){
       
   419                 error("Cookie.set(): Value cannot be undefined.");
       
   420             }
       
   421             
       
   422             options = options || {};
       
   423         
       
   424             var text = this._createCookieString(name, value, !options.raw, options);
       
   425             doc.cookie = text;
       
   426             return text;
       
   427         },
       
   428             
       
   429         /**
       
   430          * Sets a sub cookie with a given name to a particular value.
       
   431          * @param {String} name The name of the cookie to set.
       
   432          * @param {String} subName The name of the subcookie to set.
       
   433          * @param {Variant} value The value to set.
       
   434          * @param {Object} options (Optional) An object containing one or more
       
   435          *      cookie options: path (a string), domain (a string), expires (a Date object),
       
   436          *      and secure (true/false).
       
   437          * @return {String} The created cookie string.
       
   438          * @method setSub
       
   439          * @static
       
   440          */
       
   441         setSub : function (name, subName, value, options) {
       
   442 
       
   443             validateCookieName(name);   //throws error
       
   444     
       
   445             validateSubcookieName(subName);   //throws error
       
   446             
       
   447             if (isUndefined(value)){
       
   448                 error("Cookie.setSub(): Subcookie value cannot be undefined.");
       
   449             }
       
   450     
       
   451             var hash = this.getSubs(name);
       
   452             
       
   453             if (!isObject(hash)){
       
   454                 hash = {};
       
   455             }
       
   456             
       
   457             hash[subName] = value;        
       
   458             
       
   459             return this.setSubs(name, hash, options);
       
   460             
       
   461         },
       
   462         
       
   463         /**
       
   464          * Sets a cookie with a given name to contain a hash of name-value pairs.
       
   465          * @param {String} name The name of the cookie to set.
       
   466          * @param {Object} value An object containing name-value pairs.
       
   467          * @param {Object} options (Optional) An object containing one or more
       
   468          *      cookie options: path (a string), domain (a string), expires (a Date object),
       
   469          *      and secure (true/false).
       
   470          * @return {String} The created cookie string.
       
   471          * @method setSubs
       
   472          * @static
       
   473          */
       
   474         setSubs : function (name, value, options) {
       
   475             
       
   476             validateCookieName(name);   //throws error
       
   477             
       
   478             if (!isObject(value)){
       
   479                 error("Cookie.setSubs(): Cookie value must be an object.");
       
   480             }
       
   481         
       
   482             var text /*:String*/ = this._createCookieString(name, this._createCookieHashString(value), false, options);
       
   483             doc.cookie = text;
       
   484             return text;        
       
   485         }     
       
   486     
       
   487     };
       
   488 
       
   489 
       
   490 
       
   491 }, '3.0.0b1' ,{requires:['yui-base']});