CXGN/UserPrefs.js

   1 /**
   2
   3 =head1 NAME
   4
   5  CXGN.UserPrefs
   6
   7 =head1 SYNOPSIS
   8
   9  A javascript module for handling the User Preferences cookie
  10
  11 =head1 AUTHOR
  12
  13  Christopher Carpita <csc32@cornell.edu>
  14
  15 =cut
  16
  17 */
  18
  19 JSAN.use("CXGN.Base");
  20 JSAN.use("CXGN.Cookie");
  21 JSAN.use("CXGN.User");
  22 JSAN.use("MochiKit.Logging");
  23
  24 UserPrefs = window.UserPrefs || {};
  25
  26 var UserPrefs = {
  27         data: new Object,
  28         _init: function() {
  29                 UserPrefs.parse(Cookie.get('user_prefs'));
  30         },
  31 /*
  32
  33 =head2 parse( cookie_string )
  34
  35  Given a cookie_string, parses out key/value relationships and sets
  36  them to the object (assc. array) UserPrefs.data
  37
  38 =cut
  39
  40 */
  41         parse: function(cookie_string) {
  42                 cookie_string = decodeURIComponent(cookie_string);
  43                 var kvps = cookie_string.split(':');
  44                 for(var j = 0; j < kvps.length; j++){
  45                         var kv = kvps[j].split('=');
  46                         var k = kv[0];
  47                         var v = kv[1];
  48                         UserPrefs.data[k] = v;
  49                 }
  50         },
  51 /*
  52
  53 =head2 build()
  54
  55  Build and returncookie string from UserPrefs.data object (assc. array)
  56
  57 =cut
  58
  59 */
  60         build: function() {
  61                 var data = UserPrefs.data;
  62                 var cookie_string = '';
  63                 var i = 0;
  64                 for(key in data){
  65                         if(i>0) cookie_string += ":";
  66                         cookie_string += encodeURIComponent(key) + "=" + encodeURIComponent(data[key])
  67                         i++;
  68                 }
  69                 return encodeURIComponent(cookie_string);
  70         },
  71
  72 /*
  73
  74 =head2 save()
  75
  76 Calls build() and sets this to the cookie
  77
  78 =cut
  79
  80 */
  81         save: function() {
  82                 var thisDate = new Date();
  83                 var base = new Date(0);
  84                 var skew = base.getTime();
  85                 var unix_epoch_time = thisDate.getTime();
  86         if (skew > 0)  unix_epoch_time -= skew;  //Steve Jobs had nothing to do with this, apparently
  87                 UserPrefs.setValue('timestamp', unix_epoch_time);
  88                 Cookie.set('user_prefs', UserPrefs.build(), 1000);
  89         },
  90 /*
  91
  92 =head2 getValue(key)
  93
  94  Gets the current value for the key in the associative array
  95
  96 =cut
  97
  98 */
  99     getValue: function(key) {
 100                 return UserPrefs.data[key];
 101         },
 102 /*
 103
 104 =head2 setValue(key, value)
 105
 106  Given a key and value, sets the associative array
 107
 108 =cut
 109
 110 */
 111         setValue: function(key,value) {
 112                 UserPrefs.data[key] = value;
 113         }
 114 }
 115
 116 /**
 117
 118 DEPRECATED CODE that doesn't use double-encoding
 119
 120
 121 var UserPrefs = {
 122         user_pref_string: '',
 123         _preferences: new Object,
 124         _init: function() {
 125                 var user_pref_string = UserPrefs.user_pref_string;
 126                 //the string is initially set server-side, so if we don't get
 127                 //anything, we try the client-side cookie
 128                 if(user_pref_string.length<1) UserPrefs.loadCookie();
 129
 130                 if(user_pref_string.length>0 && user_pref_string.indexOf('=') && user_pref_string.indexOf(":")) {
 131                         var pref_array = user_pref_string.split(":");
 132                         for(var n = 0; n < pref_array.length; n++) {
 133                                 var key_val = pref_array[n].split("=");
 134                                 if(key_val[0].length>0 && key_val[1].length>0){
 135                                         UserPrefs._preferences[key_val[0]] = key_val[1];
 136                                 }
 137                         }
 138                 }
 139                 UserPrefs.setCookie();
 140
 141         },
 142         setCookie: function() {
 143                 var thisDate = new Date();
 144                 var base = new Date(0);
 145                 var skew = base.getTime();
 146                 var unix_epoch_time = thisDate.getTime();
 147         if (skew > 0)  unix_epoch_time -= skew;  //Steve Jobs had nothing to do with this, apparently
 148                 UserPrefs._preferences.timestamp = unix_epoch_time;
 149                 UserPrefs._preferences.sp_person_id = User.sgn_user_id;
 150                 UserPrefs._preferences.sgn_session_id = User.sgn_session_id;
 151                 UserPrefs._buildString();
 152                 Cookie.set('user_prefs', UserPrefs.user_pref_string, 1000);
 153         },
 154         //send will make an AJAX request to the server, writing the cookie string to the database.  neat-o!
 155         //ONLY use this when you anticipate that the user will set a preference and not load another page.  The page-loading process will update the user_prefs string in the database from the user's cookie.
 156         send: function() {
 157                 var req = new Request();
 158                 if(req.isValid()){
 159                         var parameters = "?sgn_session_id=" + User.sgn_session_id + "&user_prefs=" + encodeURIComponent(UserPrefs.user_pref_string);
 160                         req.sendRequest("/scraps/set_user_prefs.pl", parameters);
 161                         return true;
 162                 }
 163                 return false;
 164         },
 165         _response: function(doc) {
 166                 var updated = doc.getElementsByTagName("updated")[0].firstChild.nodeValue;
 167                 var errmsgtag = doc.getElementsByTagName("errmsg")[0];
 168                 var fatalmsgtag = doc.getElementsByTagName("fatalmsg")[0];
 169                 if(updated) {
 170                         MochiKit.Logging.log("UserPref setting successful");
 171                 }
 172                 else {
 173                         MochiKit.Logging.logError("UserPref setting failed!");
 174                         if(errmsgtag){
 175                                 MochiKit.Logging.logError("\n"+errmsgtag.firstChild.nodeValue);
 176                         }
 177                         if(fatalmsgtag){
 178                                 MochiKit.Logging.logFatal("\n"+fatalmsgtag.firstChild.nodeValue);
 179                         }
 180                 }
 181         },
 182
 183         loadCookie: function() {
 184                 UserPrefs.user_pref_string = Cookie.get('user_prefs');
 185         },
 186         _buildString: function() {
 187                 var new_string = '';
 188                 var i = 0;
 189                 for(var name in UserPrefs._preferences){
 190                         if(i>0) new_string += ":";
 191                         new_string += name + "=" + UserPrefs._preferences[name];
 192                         i++;
 193                 }
 194                 UserPrefs.user_pref_string = new_string;
 195         },
 196         set: function(name, value) {
 197                 UserPrefs._preferences[name] = value;
 198         },
 199         get: function(name) {
 200                 return UserPrefs._preferences[name];
 201         }
 202 }
 203 UserPrefs._init();
 204
 205 **/
 206
 207