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

   1 /*
   2 @version: 0.4
   3 @author: Sudheer K. <scifi1947 at gmail.com>
   4 @license: GNU General Public License
   5 */
   6
   7 var strErrorMessage;
   8
   9 function reloadQuotes(){
  10     var query = getQuery();
  11     if (query){
  12         quoteRefreshStarted();
  13         logUtility.logMessage("Reloading Data..");
  14         //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';
  15         //var queryURL = 'http://download.finance.yahoo.com/d/quotes.csv?s=INDU+^IXIC+^GSPC+CLJ11.NYM+YHOO+AAPL+GOOG+MSFT+ACT&f=snl1c1p2vj1&e=.csv';
  16         var queryURL = 'http://download.finance.yahoo.com/d/quotes.csv?s='+query+'&f=snl1c1p2vj1&e=.csv';
  17         logUtility.logMessage(queryURL);
  18
  19         var response = new XMLHttpRequest();
  20         response.onreadystatechange = function() {
  21             if (response.readyState === XMLHttpRequest.DONE) {
  22                 var success = refreshDataModel(response);
  23                 if (success === true){
  24                     logUtility.logMessage("Data Reload Completed..");
  25                 }
  26                 else{
  27                     logUtility.logMessage("Data Reload Failed..");
  28                 }
  29                 quoteRefreshCompleted(success,strErrorMessage);
  30             }
  31         }
  32
  33         response.open("GET", queryURL);
  34         response.send();
  35     }
  36     else{
  37         logUtility.logMessage("No stock symbols found in configuration.");
  38         if (!isDesktopWidget)
  39             strErrorMessage = "Tap the title bar to add stock tickers and update settings."
  40         else
  41             strErrorMessage = "Use the widget settings screen to add stock tickers and update configuration."
  42         stockQuoteDataModel.clear();
  43         quoteRefreshCompleted(false,strErrorMessage);
  44     }
  45 }
  46
  47 function getQuery(){
  48     var query;
  49     var symbolsArray = DBUtility.getAllSymbols();
  50     if (symbolsArray && symbolsArray.length > 0){
  51         var i = 0;
  52         for (i = 0; i< symbolsArray.length; i++) {
  53             logUtility.logMessage("Appending "+symbolsArray[i]+ " to Query");
  54
  55             if (!query){
  56                 query = symbolsArray[i];
  57             }
  58             else{
  59                 query = query + '+' + symbolsArray[i];
  60             }
  61         }
  62     }
  63
  64     return query;
  65 }
  66
  67 function reloadNews(){
  68     if (!rssURL || rssURL === "Unknown") {
  69         logUtility.logMessage("Invalid RSS URL: "+rssURL);
  70     }
  71     else{
  72         logUtility.logMessage("Reloading news from "+rssURL);
  73         //var queryURL = "http://finance.yahoo.com/rss/topfinstories";
  74         logUtility.logMessage(rssURL);
  75         var response = new XMLHttpRequest();
  76         response.onreadystatechange = function() {
  77             if (response.readyState === XMLHttpRequest.DONE) {
  78                 var success = refreshNewsModel(response);
  79                 if (success === true){
  80                     logUtility.logMessage("News Reload Completed..");
  81                 }
  82                 else{
  83                     logUtility.logMessage("News Reload Failed..");
  84                 }
  85                 newsReloadCompleted(success,strErrorMessage);
  86             }
  87         }
  88
  89         response.open("GET", rssURL);
  90         response.send();
  91     }
  92 }
  93
  94 function refreshDataModel(response){
  95     var status = false;
  96     if (!response.responseText) {
  97         strErrorMessage = "Error occurred while loading stock quotes."
  98         logUtility.logMessage("No responseText for quotes");
  99         return status;
 100     }
 101     else{
 102         //snl1c1p2vj1
 103         var quoteDetails = CSVUtility.csvToArray(response.responseText.trim());
 104         var i = 0;
 105         if (quoteDetails && quoteDetails.length > 0){
 106             logUtility.logMessage("Clearing Data Model");
 107             stockQuoteDataModel.clear();
 108
 109             for (i = 0; i < quoteDetails.length; i++){
 110
 111                 var symbol,stockName,lastTradedPrice,change,changePercentage,volume,marketCap;
 112                 symbol = quoteDetails[i][0];
 113                 stockName = quoteDetails[i][1];
 114                 lastTradedPrice = quoteDetails[i][2];
 115                 change = (quoteDetails[i][3] !== 'N/A')? quoteDetails[i][3]:'';
 116                 changePercentage = (quoteDetails[i][4] !== 'N/A')? quoteDetails[i][4]:'';
 117                 volume = (quoteDetails[i][5] !== 'N/A')? quoteDetails[i][5]:'';
 118                 marketCap = (quoteDetails[i][6] !== 'N/A')? quoteDetails[i][6]:'';
 119
 120                 stockQuoteDataModel.append({"symbol":symbol,"stockName":stockName,"lastTradedPrice":lastTradedPrice,"change":change,"changePercentage":changePercentage,"volume":volume,"marketCap":marketCap});
 121                 //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);
 122                 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);
 123             }
 124
 125             status = true;
 126             var timeNow = new Date();
 127             try{
 128                 lastUpdatedTimeStamp = "Updated: "+DateLib.ISODate.format(timeNow);
 129                 logUtility.logMessage(lastUpdatedTimeStamp);
 130             }
 131             catch(exception){
 132                 logUtility.logMessage("Error occured while converting timestamp");
 133                 logUtility.logMessage(exception);
 134             }
 135         }
 136         else
 137         {
 138             strErrorMessage = "Quotes could not be fetched from Yahoo! Finance. Please verify the tickers and try again later."
 139             logUtility.logMessage(response.responseText);
 140             status = false;
 141         }
 142     }
 143
 144     return status;
 145 }
 146
 147 function refreshNewsModel(response){
 148     var status = false;
 149     if (!response.responseXML) {
 150         //This shouldn't happen
 151         strErrorMessage = "Error occurred while loading news."
 152         if (response.responseText)
 153             logUtility.logMessage(response.responseText);
 154         else
 155             logUtility.logMessage("No responseXML for news");
 156         return status;
 157     }
 158
 159     //Not the best code I ever wrote, but got no choice
 160     //Refer to Memory leak issue with XMLListModel --> http://bugreports.qt.nokia.com/browse/QTBUG-15191
 161
 162
 163     var xmlDoc = response.responseXML.documentElement;
 164     //var channel = xmlDoc.firstChild; Doesn't work with some RSS providers. THANK YOU, YAHOO
 165
 166     var channel;
 167
 168     var i = 0;
 169     for (i = 0; i < xmlDoc.childNodes.length; i++){
 170         if (xmlDoc.childNodes[i].nodeName === 'channel') {
 171             channel = xmlDoc.childNodes[i];
 172             break;
 173         }
 174     }
 175
 176     if (channel) {
 177         var itemNodes = channel.childNodes;
 178         if (itemNodes){
 179
 180             logUtility.logMessage("Clearing News Model");
 181             newsDataModel.clear();
 182             logUtility.logMessage("No. of news stories = "+itemNodes.length);
 183
 184             for (i = 0; i < itemNodes.length; i++) {
 185                 if (itemNodes[i].nodeName === 'item'){
 186                     var newsElements = itemNodes[i].childNodes;
 187                     var j = 0;
 188                     var newsTitle,newsLink
 189                     for (j = 0; j < newsElements.length; j++){
 190
 191                         switch (newsElements[j].nodeName){
 192                             case 'title':
 193                                 newsTitle = newsElements[j].childNodes[0].nodeValue;
 194                                 break;
 195                             case 'link':
 196                                 newsLink = newsElements[j].childNodes[0].nodeValue;
 197                                 break;
 198                             default:
 199                         }
 200                     }
 201                     newsDataModel.append({"title":newsTitle,"link":newsLink});
 202                     //logUtility.logMessage("Title: "+newsDataModel.get(i).title+", Link: "+ newsDataModel.get(i).link);
 203                     //logUtility.logMessage("Title: "+newsTitle+", Link: "+ newsLink);
 204                 }
 205             }
 206             status = true;
 207         }
 208         else{
 209             strErrorMessage = "The RSS feed did not contain any news stories. Please try again later."
 210             logUtility.logMessage(response.responseText);
 211             status = false;
 212         }
 213     }
 214     else{
 215         strErrorMessage = "The RSS feed did not return valid data. Please check the URL and try again later."
 216         logUtility.logMessage(response.responseText);
 217         status = false;
 218     }
 219
 220     return status;
 221 }
 222
 223 function loadSettings(){
 224     var value;
 225     value  = DBUtility.getSetting("UpdateFreqency");
 226     if (!value || value == "0.0" || value === "" || isNaN(value)){
 227         autoUpdateInterval = 0;
 228     }
 229     else{
 230         autoUpdateInterval = parseInt(value)*60*1000; //Convert minutes to milliseconds
 231     }
 232     value  = DBUtility.getSetting("UpdateWeekdaysOnly");
 233     if (!value || value == "0.0" || value === ""){
 234         updateWeekDaysOnly = false;
 235     }
 236     else{
 237         updateWeekDaysOnly = true;
 238     }
 239
 240 /*
 241     value  = DBUtility.getSetting("UpdateOnSavedNetworksOnly");
 242     if (!value || value == "0.0" || value === ""){
 243         updateOnSavedNetworksOnly = false;
 244     }
 245     else{
 246         updateOnSavedNetworksOnly = true;
 247     }
 248 */
 249
 250     value  = DBUtility.getSetting("RSSURL");
 251     if (!value || value == "Unknown" || value === ""){
 252         //Do Nothing
 253     }
 254     else if (value === 'http://finance.yahoo.com/rss/topstories'){
 255         /*
 256           Yahoo changed their Top New rss feed from http://finance.yahoo.com/rss/topstories to http://finance.yahoo.com/rss/topfinstories.
 257           Since the application has a hardcoded default rss feed, it is better to update it here. Not sure if this is the best way to deal with such changes.
 258          */
 259
 260             rssURL = "http://finance.yahoo.com/rss/topfinstories";
 261             DBUtility.setSetting("RSSURL",rssURL);
 262     }
 263     else
 264     {
 265         rssURL = value;
 266     }
 267 }
 268
 269 function initialize(){
 270     if (autoUpdateTimer.running) autoUpdateTimer.stop();
 271     loadSettings();
 272     reloadQuotes();
 273     reloadNews();
 274
 275     if (autoUpdateInterval !== 0) {
 276         logUtility.logMessage("Starting Timer..");
 277         autoUpdateTimer.start();
 278     }
 279 }