vcs.maemo.org Git - marketstoday/blob - src/qml/Library/js/CoreLogic.js

   1 /*
   2 @version: 0.2
   3 @author: Sudheer K. <scifi1947 at gmail.com>
   4 @license: GNU General Public License
   5 */
   6
   7 function getQuery(){
   8     var query;
   9     var symbolsArray = DBUtility.getAllSymbols();
  10     if (symbolsArray && symbolsArray.length > 0){
  11         var i = 0;
  12         for (i = 0; i< symbolsArray.length; i++) {
  13             logUtility.logMessage("Appending "+symbolsArray[i]+ " to Query");
  14
  15             if (!query){
  16                 query = '"'+symbolsArray[i]+'"';
  17             }
  18             else{
  19                 query = query + ',"' + symbolsArray[i]+'"';
  20             }
  21         }
  22     }
  23
  24     return query;
  25 }
  26
  27 function refreshDataModel(responseXML){
  28     if (!(responseXML && stockQuoteDataModel)) return;
  29
  30     var xmlDoc = responseXML.documentElement;
  31     var results = xmlDoc.firstChild;
  32
  33     //Not the best code I ever wrote, but got no choice
  34     //Refer to Memory leak issue with XMLListModel --> http://bugreports.qt.nokia.com/browse/QTBUG-15191
  35
  36     if (results) {
  37         var quoteNodes = results.childNodes;
  38         if (quoteNodes){
  39             logUtility.logMessage("Clearing Data Model");
  40             stockQuoteDataModel.clear();
  41
  42             var i = 0;
  43             for (i = 0; i < quoteNodes.length; i++) {
  44
  45                 var quoteElements = quoteNodes[i].childNodes;
  46                 var j = 0;
  47                 var symbol,stockName,lastTradedPrice,change,changePercentage,volume,marketCap
  48
  49                 for (j = 0; j < quoteElements.length; j++){
  50
  51                     switch (quoteElements[j].nodeName){
  52                         case 'Symbol':
  53                             symbol = quoteElements[j].childNodes[0].nodeValue;
  54                             break;
  55                         case 'Name':
  56                             stockName = quoteElements[j].childNodes[0].nodeValue;
  57                             break;
  58                         case 'LastTradePriceOnly':
  59                             lastTradedPrice = quoteElements[j].childNodes[0].nodeValue;
  60                             break;
  61                         case 'Change':
  62                             change = (quoteElements[j].childNodes[0])? quoteElements[j].childNodes[0].nodeValue:"";
  63                             break;
  64                         case 'ChangeinPercent':
  65                             changePercentage = (quoteElements[j].childNodes[0])? quoteElements[j].childNodes[0].nodeValue:"";
  66                             break;
  67                         case 'Volume':
  68                             volume = (quoteElements[j].childNodes[0])? quoteElements[j].childNodes[0].nodeValue:"";
  69                             break;
  70                         case 'MarketCapitalization':
  71                             marketCap = (quoteElements[j].childNodes[0])? quoteElements[j].childNodes[0].nodeValue:"";
  72                             break;
  73                         default:
  74                     }
  75                 }
  76                 stockQuoteDataModel.append({"symbol":symbol,"stockName":stockName,"lastTradedPrice":lastTradedPrice,"change":change,"changePercentage":changePercentage,"volume":volume,"marketCap":marketCap});
  77                 //logUtility.logMessage("Symbol: "+stockQuoteDataModel.get(i).symbol+", Name: "+ stockQuoteDataModel.get(i).stockName+", LastTraded: "+stockQuoteDataModel.get(i).lastTradedPrice+", Change: "+stockQuoteDataModel.get(i).change+", ChangePercent: "+stockQuoteDataModel.get(i).changePercentage+", Volume: "+stockQuoteDataModel.get(i).volume+", MarketCap: "+stockQuoteDataModel.get(i).marketCap);
  78                 logUtility.logMessage(stockQuoteDataModel.get(i).symbol+", "+stockQuoteDataModel.get(i).lastTradedPrice+", "+stockQuoteDataModel.get(i).change+", "+stockQuoteDataModel.get(i).changePercentage+", "+stockQuoteDataModel.get(i).volume+", "+stockQuoteDataModel.get(i).marketCap);
  79             }
  80         }
  81     }
  82
  83     var queryNode = xmlDoc;
  84     if (queryNode) {
  85         i = 0;
  86         var queryAttributes = queryNode.attributes;
  87         for (i = 0; i < queryAttributes.length; i++) {
  88             if (queryAttributes[i].name == 'created') {
  89                 screen.lastUpdatedTimeStamp = "Updated: "+DateLib.ISODate.format(queryAttributes[i].value);
  90                 logUtility.logMessage(screen.lastUpdatedTimeStamp);
  91                 break;
  92             }
  93         }
  94     }
  95 }
  96
  97 function refreshNewsModel(responseXML){
  98     if (!(responseXML && newsDataModel)) return;
  99
 100     var xmlDoc = responseXML.documentElement;
 101     var channel = xmlDoc.firstChild;
 102
 103     //Not the best code I ever wrote, but got no choice
 104     //Refer to Memory leak issue with XMLListModel --> http://bugreports.qt.nokia.com/browse/QTBUG-15191
 105
 106     if (channel) {
 107         var itemNodes = channel.childNodes;
 108         if (itemNodes){
 109
 110             logUtility.logMessage("Clearing News Model");
 111             newsDataModel.clear();
 112
 113             var i = 0;
 114             for (i = 0; i < itemNodes.length; i++) {
 115
 116                 if (itemNodes[i].nodeName === 'item'){
 117                     var newsElements = itemNodes[i].childNodes;
 118                     var j = 0;
 119                     var newsTitle,newsLink
 120                     for (j = 0; j < newsElements.length; j++){
 121
 122                         switch (newsElements[j].nodeName){
 123                             case 'title':
 124                                 newsTitle = newsElements[j].childNodes[0].nodeValue;
 125                                 break;
 126                             case 'link':
 127                                 newsLink = newsElements[j].childNodes[0].nodeValue;
 128                                 break;
 129                             default:
 130                         }
 131                     }
 132                     newsDataModel.append({"title":newsTitle,"link":newsLink});
 133                     //logUtility.logMessage("Title: "+newsDataModel.get(i).title+", Link: "+ newsDataModel.get(i).link);
 134                     //logUtility.logMessage("Title: "+newsTitle+", Link: "+ newsLink);
 135                 }
 136             }
 137         }
 138     }
 139 }
 140
 141 function reloadQuotes(){
 142     var query = getQuery();
 143     if (query){
 144         screen.quoteRefreshStarted();
 145         logUtility.logMessage("Reloading Data..");
 146
 147         //var queryURL = 'http://query.yahooapis.com/v1/public/yql?q=select * from yahoo.finance.quotes where symbol in ("INDU","^IXIC","^GSPC","CLJ11.NYM","YHOO","AAPL","GOOG","MSFT")&env=store://datatables.org/alltableswithkeys';
 148         var queryURL = 'http://query.yahooapis.com/v1/public/yql?q=select Symbol,Name,LastTradePriceOnly,Change,ChangeinPercent,Volume,MarketCapitalization from yahoo.finance.quotes where symbol in ('+query+')&env=store://datatables.org/alltableswithkeys';
 149         logUtility.logMessage(queryURL);
 150
 151         var response = new XMLHttpRequest();
 152         response.onreadystatechange = function() {
 153             if (response.readyState == XMLHttpRequest.DONE) {
 154                 refreshDataModel(response.responseXML);
 155                 logUtility.logMessage("Data Reload Completed..");
 156                 screen.quoteRefreshCompleted();
 157             }
 158         }
 159
 160         response.open("GET", queryURL);
 161         response.send();
 162     }
 163     else{
 164         logUtility.logMessage("No stock symbols found in configuration.");
 165     }
 166 }
 167
 168 function reloadNews(){
 169     if (!rssURL || rssURL == "Unknown") {
 170         logUtility.logMessage("Invalid RSS URL: "+rssURL);
 171     }
 172     else{
 173         logUtility.logMessage("Reloading news from "+rssURL);
 174         //var queryURL = "http://finance.yahoo.com/rss/topstories";
 175         logUtility.logMessage(rssURL);
 176         var response = new XMLHttpRequest();
 177         response.onreadystatechange = function() {
 178             if (response.readyState == XMLHttpRequest.DONE) {
 179                 refreshNewsModel(response.responseXML);
 180                 logUtility.logMessage("News Reload Completed..");
 181             }
 182         }
 183
 184         response.open("GET", rssURL);
 185         response.send();
 186     }
 187 }
 188
 189
 190 function loadSettings(){
 191     var value;
 192     value  = DBUtility.getSetting("UpdateFreqency");
 193     if (!value || value == "0.0" || value === "" || isNaN(value)){
 194         autoUpdateInterval = 0;
 195     }
 196     else{
 197         autoUpdateInterval = parseInt(value)*60*1000; //Convert minutes to milliseconds
 198     }
 199     value  = DBUtility.getSetting("UpdateWeekdaysOnly");
 200     if (!value || value == "0.0" || value === ""){
 201         updateWeekDaysOnly = false;
 202     }
 203     else{
 204         updateWeekDaysOnly = true;
 205     }
 206
 207 /*
 208     value  = DBUtility.getSetting("UpdateOnSavedNetworksOnly");
 209     if (!value || value == "0.0" || value === ""){
 210         updateOnSavedNetworksOnly = false;
 211     }
 212     else{
 213         updateOnSavedNetworksOnly = true;
 214     }
 215 */
 216
 217     value  = DBUtility.getSetting("RSSURL");
 218     if (!value || value == "Unknown" || value === ""){
 219         //Do Nothing
 220     }
 221     else{
 222         rssURL = value;
 223     }
 224 }
 225
 226 function initialize(){
 227     if (autoUpdateTimer.running) autoUpdateTimer.stop();
 228     loadSettings();
 229     reloadQuotes();
 230     reloadNews();
 231
 232     if (autoUpdateInterval !== 0) {
 233         logUtility.logMessage("Starting Timer..");
 234         autoUpdateTimer.start();
 235     }
 236 }