PC World Komputer 2010 April/PCWorld0410.iso/pluginy Firefox/1833/1833.xpi/chrome/yoono.jar/content/yoono/random.js

JavaScript | 2009-12-16 | 5.5 KB | 136 lines

// fetch a surprise URL
var yoonoRandomGlob = new Object();
var win = yoonoGlob.WMED.getMostRecentWindow("navigator:browser");
yoonoRandomGlob.browser = win.getBrowser().mCurrentBrowser;

Components.utils.import("resource://yoono/yoonoService.js");
Components.utils.import("resource://yoono/yoonoBkmSync.js");
Components.utils.import("resource://yoono/yoonoLog.js");

const YNPREFBRANCH = Components.classes["@mozilla.org/preferences-service;1"].getService(Components.interfaces.nsIPrefService).getBranch("extensions.yoono.");

yoonoRandomGlob.init = function() {
  try {
    var id = '';
    try {
      id = YNPREFBRANCH.getCharPref('randomfolderid');
    } catch(e) {
    }

    YNPREFBRANCH.setCharPref('randomfolderid', '');
    if(id != '') {
      YOONO_LOG.debug("Surprise from folder");
      yoonoRandomGlob.urlList = YOONO_BKM.getNodeListUrl(id);
    } else {
      YOONO_LOG.debug("Surprise from all bkms");
      yoonoRandomGlob.urlList = YOONO_BKM.getFullListUrl();
    }

    // display waiting message
    win.messageinfos.init('searching', win.yoonoGlob.gStrbundle.getString("random.searching"));
    // Get full bookmark list from bookmarks in order to check if random url is in bookmarks
    // (if it is, we'll take another one)
    // Absolute max number of requests to obtain random urls
    yoonoRandomGlob.maxRetry = 10;
    // try to read the maxRetry from prefs (it was given by the server at connect time and saved in prefs)
    try {
      yoonoRandomGlob.maxRetry = YNPREFBRANCH.getIntPref('surprise-me.max-retry');
    } catch(e) {} // in case not in prefs...
    if(yoonoRandomGlob.maxRetry > 10) yoonoRandomGlob.maxRetry = 10;

    // current retry
    yoonoRandomGlob.current = 0;
    // Hash table to easily find urls that are in bookmarks already
    yoonoRandomGlob.urlTable = {};
    for (var i = yoonoRandomGlob.urlList.length ; i-- > 0; ) {
      yoonoRandomGlob.urlTable[yoonoRandomGlob.urlList[i]] = 1;
    }
    // default server url
    yoonoRandomGlob.serverUrl = YNPREFBRANCH.getCharPref('serverurl') + 'linkserver';
    // Try getting server url from prefs, was given at connect time
    try {
      yoonoRandomGlob.serverUrl = YNPREFBRANCH.getCharPref('reco-service.url');
    } catch(e) {} // in case not in prefs...

    yoonoRandomGlob.getRandomSuggestions();
  } catch(e) {
    YOONO_LOG.exception(e);
  }
}
// Ask for suggestions from a random bookmark
yoonoRandomGlob.getRandomSuggestions = function() {
  try {
    // Get a random offset in the list of bookmarks
    yoonoRandomGlob.randomOffset = Math.floor(Math.random() * yoonoRandomGlob.urlList.length);
    // Get the random bookmark. We'll use it to ask suggestions to the server
    yoonoRandomGlob.browser.ynSuggestUrlFrom = yoonoRandomGlob.urlList[yoonoRandomGlob.randomOffset];
    // If we must try again, we don't want to try this bookmark again. Remove it
    yoonoRandomGlob.urlList.splice(yoonoRandomGlob.randomOffset, 1);
    // count one try
    yoonoRandomGlob.current ++ ;
    var script = <server-script version="1.0"/>;
    script.appendChild( <compute-recommended-links url={yoonoRandomGlob.browser.ynSuggestUrlFrom} ranking="SURPRISEME"/>);
    YOONO_CMPT.sendRequest(yoonoRandomGlob.serverUrl, 'POST', 'async', script, yoonoRandomGlob.handleRandomSuggestions);
  } catch(e) {
    YOONO_LOG.exception(e);
  }
}

// Handler for server responses to suggestions from a random bookmark
yoonoRandomGlob.handleRandomSuggestions = function(request, result) {
  try {
    var suggestUrl = '';
    if(result) {
      var suggestions = result['import-links'].link;
      // Get rid of suggestions that already are in our bookmarks or history
      var cleansuggestions = yoonoRandomGlob.ynCleanSuggestions (suggestions);
      // If some suggestions remain, pick up one at random
      if (cleansuggestions.length) {
        var link = cleansuggestions[(Math.floor(Math.random() * cleansuggestions.length))];
        //var link = cleansuggestions[0];

        suggestUrl = [e-mail]();
      }
    }
    // Nothing is left, or bad answer : ask the server again (with another bookmark)
    // if we haven't tried all the bookmarks yet, and did not reach max retries
    if('' == suggestUrl) {
      if(yoonoRandomGlob.urlList.length && (yoonoRandomGlob.current < yoonoRandomGlob.maxRetry)) {
        yoonoRandomGlob.getRandomSuggestions();
      } else {
        // display no surprise found message
        win.messageinfos.init('randomfailed', win.yoonoGlob.gStrbundle.getString("random.failed"));
        // stat
        YOONO_CMPT.addStat(['nosurprise']);
      }
    } else {
      // keep track for message display
      yoonoRandomGlob.browser.ynSuggestUrl = suggestUrl
      win.messageinfos.init('random', win.yoonoGlob.gStrbundle.getString("random.messageinfos"), yoonoRandomGlob.browser.ynSuggestUrlFrom);
      document.location = suggestUrl;
    }

  } catch(e) {
    YOONO_LOG.exception(e);
  }
}


// Nettoyage des suggestions :
// On supprime des suggestions retournées par le serveur toutes celles figurant deja dans les
// bookmarks
yoonoRandomGlob.ynCleanSuggestions = function(suggestions) {
  var tmpurlList = [];

  // history urls must be refreshed each time
  var url = '';
  // delete knowurls (found in bkms or history)
  for each (var link in suggestions) {
    url = [e-mail]();
    if (!yoonoRandomGlob.urlTable[url]) {
      tmpurlList.push(link);
    }
  }
  return tmpurlList;
}