Modified script for the "Add Facebook Events to Google Calendar" Chrome extension

facebook_cscript.js

postpone();

function postpone()
{
  init();
  window.setTimeout(postpone,500);
}

function init()
{
  if($('#gcalLink')[0]) return;

  if(!$('.fbEventHeadline')[0]) return;
  
  $('.fbEventHeadline + div').append(" · <span class='fsm'><a href='#' id='gcalLink' title='Add to Google Calendar'>Add to Calendar</a></span>"); 
  
  $('#gcalLink').click(linkClick);
}

function getLang()
{
  var m = $('body').attr('class').match(/_(\w\w)_/);
  return m[1];
}

function getTitle()
{
  return $('.fbEventHeadline').text();
}

function getLocation()
{
  // map overlay -> take first two lines
  var $location = $('#contentArea .uiImageBlockContent .uiInlineBlock'); 
  if($location[0])
  {
    var locationText = '';
    
    var div1 = $location.find('div div')[0];
    if(div1) locationText = div1.innerText;
    
    //alert(locationText);
    
    var div2 = $location.find('div div')[1];
    if(div2 && div2.innerText) locationText += ', ' + div2.innerText;
    
    //alert(locationText);
    
    if(locationText != '')
      return locationText;
  }
  
  // text only version
  var whereEl =  findElement("//tr[td/div/i[contains(@title,'Where')]]/td[2]");
  if(whereEl)
    return whereEl.innerText;
  
  return '';
}

function getDescription()
{
  var descriptionText = '';
  var descriptionEl =  findElement("//tr[td/div[contains(@class,'fbDescriptionIcon')]]/td[2]");
  if(descriptionEl)
    descriptionText = descriptionEl.innerText;

  // shorten
  while(encodeURIComponent(descriptionText).length > 1400) { descriptionText = descriptionText.substring(0, descriptionText.length - 100); }
  
  descriptionText += '\n\n' + location.toString();
  descriptionText = descriptionText.replace(/^\n+/,'');
  
  return descriptionText;
}

function getDates()
{
  var dateFrom, dateTo;
  if($('.fbInfoDateTime span').length == 2)
  {
    dateFrom = $('.fbInfoDateTime span')[0].innerText;
    dateTo = $('.fbInfoDateTime span')[1].innerText;
  }
  else
  {
    //This new code handles three cases:
    //Start/end times on the same day
    //Start/end times on the different day
    //Just a start time

    whenEl = $('div i[title="When"]').parent();
    timeEl = $('div i[title="Time"]').parent();
    if(timeEl.length) 
    {
      //This is a separate time/day event
      fromto = timeEl.siblings('div').find('span');
      if(fromto.length) 
      {
        //There's a from/to
        dateFrom = dayText + ' ' + fromto.eq(0).text();
        dateTo = dayText + ' ' + fromto.eq(1).text();
      } 
      else 
      {
        //It's just a time
        dateFrom = dayText + ' ' + timeEl.siblings().eq(0).text();
        dateTo = dateFrom;
      }
    } 
    else if(whenEl.length) 
    {
      //It's a combo time/day event
      timeDiv = whenEl.siblings('div')
      if(timeDiv.length) {
        fromto = timeDiv.find('span');
        if(fromto.length) {
          dateFrom = fromto.eq(0).text();
          dateTo = fromto.eq(1).text();
        }
      } else {
        //This is a weird case I came across...not sure how it got there
        combotext = whenEl.siblings('span').text();
        combovals = combotext.split(' - ');
        dateFrom = combovals[0];
        dateTo = combovals[1];
      }
    } 
    else 
    {
      //If my new code can't handle it, default to the original code
      
      var dayEl =  findElement("//div[div[contains(@class,'fbInfoIcon')]][1]/div[2]");     // When
      if(dayEl)
      {
        var dayText = dayEl.innerText;
        timeEl = $($(dayEl).parents('ul').find('li')[1]).find('div div.fsm')[0];

        dateFrom = dayText + ' ' + $(timeEl).find('span')[0].innerText;
        dateTo = dayText + ' ' + $(timeEl).find('span')[1].innerText;
      }
      else
      {
         var dayEl =  findElement("//div[div/i[contains(@class,'sx_a94bdb')]]/span[1]");    //When
         if(dayEl)
         {
            dateFrom = dayEl.innerText.split('until')[0];
            dateTo = dayEl.innerText.split('until')[1]; 
         }
      }
    }
  }
  return { from: dateFrom, to:dateTo };
}

function linkClick()
{
  var dates = getDates();

  /*
  alert('TITLE: ' + getTitle() 
        + '\n\nFROM: ' + dates.from
        + '\n\nTO: ' + dates.to
        + '\n\nDESCRIPTION: ' + getDescription() 
        + '\n\nLOCATION: ' + getLocation());
  */

  var href = 'http://fb.praetoris.cz/'
           + '?title=' + encodeURIComponent(getTitle()) 
           + '&from='+ encodeURIComponent(dates.from)
           + '&to='+ encodeURIComponent(dates.to)
           + '&location=' + encodeURIComponent(getLocation())
           + '&description=' + encodeURIComponent(getDescription())
           + '&offset=' + new Date().getTimezoneOffset()
           + '&lang=' + getLang();

  window.open(href);    

  return false;
} 


function findElement(xpath)
{
  return document.evaluate(xpath, document, null, XPathResult.UNORDERED_NODE_ITERATOR_TYPE, null ).iterateNext();
}

function findElements(xpath)
{
  return document.evaluate(xpath, document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null );
}