/************************************
* Item Out Of Stock Checker
* Version 1.2
* ChangeLog v1.2
*  - ONLY_ACTIVE is used to filter campaigns and adgroups only. All Keywords and Ads in the AdGroups will
*    be checked which solves the "once disabled, always disabled" issue.
*  - Updated call to get the Final Urls. Now calls getFinalUrl and getMobileFinalUrl instead of getDestinationUrl
*  - OUT_OF_STOCK_TEXTS can now contain multiple things to check for.
*  - If the CAMPAIGN_LABEL does not exist, it is ignored with a warning.
* ChangeLog v1.1 - Filtered out deleted Campaigns and AdGroups
* Created By: Russ Savage
* FreeAdWordsScripts.com
***********************************/
var URL_LEVEL = 'Ad'; // or Keyword
var ONLY_ACTIVE = true; // set to false to check keywords or ads in all campaigns (paused and active)
var CAMPAIGN_LABEL = ''; // set this if you want to only check campaigns with this label
var STRIP_QUERY_STRING = true; // set this to false if the stuff that comes after the question mark is important
var WRAPPED_URLS = true; // set this to true if you use a 3rd party like Marin or Kenshoo for managing you account
// This is the specific text (or texts) to search for 
// on the page that indicates the item 
// is out of stock. If ANY of these match the html
// on the page, the item is considered "out of stock"
var OUT_OF_STOCK_TEXTS = [
  'The Text That Identifies An Out Of Stock Item Goes Here',
  'Another string might go here but does not need to'
];
 
function main() {
  var alreadyCheckedUrls = {};
  var iter = buildSelector().get();
  while(iter.hasNext()) {
    var entity = iter.next();
    var urls = [];
    if(entity.urls().getFinalUrl()) {
      urls.push(entity.urls().getFinalUrl());
    }
    if(entity.urls().getMobileFinalUrl()) {
      urls.push(entity.urls().getMobileFinalUrl());
    }
    for(var i in urls) {
      var url = cleanUrl(urls[i]);
      if(alreadyCheckedUrls[url]) {
        if(alreadyCheckedUrls[url] === 'out of stock') {
          entity.pause();
        } else {
          entity.enable();
        }
      } else {
        var htmlCode;
        try {
          htmlCode = UrlFetchApp.fetch(url).getContentText();
        } catch(e) {
          Logger.log('There was an issue checking:'+url+', Skipping.');
          continue;
        }
        var did_pause = false;
        for(var x in OUT_OF_STOCK_TEXTS) {
          if(htmlCode.indexOf(OUT_OF_STOCK_TEXTS[x]) >= 0) {
            alreadyCheckedUrls[url] = 'out of stock';
            entity.pause();
            did_pause = true;
            break;
          }
        }
        if(!did_pause) {
          alreadyCheckedUrls[url] = 'in stock';
          entity.enable();
        }
      }
      Logger.log('Url: '+url+' is '+alreadyCheckedUrls[url]);
    }
  }
}
 
function cleanUrl(url) {
  if(WRAPPED_URLS) {
    url = url.substr(url.lastIndexOf('http'));
    if(decodeURIComponent(url) !== url) {
      url = decodeURIComponent(url);
    }
  }
  if(STRIP_QUERY_STRING) {
    if(url.indexOf('?')>=0) {
      url = url.split('?')[0];
    }
  }
  if(url.indexOf('{') >= 0) {
    //Let's remove the value track parameters
    url = url.replace(/\{[0-9a-zA-Z]+\}/g,'');
  }
  return url;
}
 
function buildSelector() {
  var selector = (URL_LEVEL === 'Ad') ? AdWordsApp.ads() : AdWordsApp.keywords();
  selector = selector.withCondition('CampaignStatus != DELETED').withCondition('AdGroupStatus != DELETED');
  if(ONLY_ACTIVE) {
    selector = selector.withCondition('CampaignStatus = ENABLED');
    if(URL_LEVEL !== 'Ad') {
      selector = selector.withCondition('AdGroupStatus = ENABLED');
    }
  }
  if(CAMPAIGN_LABEL) {
    if(AdWordsApp.labels().withCondition("Name = '"+CAMPAIGN_LABEL+"'").get().hasNext()) {
      var label = AdWordsApp.labels().withCondition("Name = '"+CAMPAIGN_LABEL+"'").get().next();
      var campIter = label.campaigns().get();
      var campaignNames = [];
      while(campIter.hasNext()) {
        campaignNames.push(campIter.next().getName());
      }
      selector = selector.withCondition("CampaignName IN ['"+campaignNames.join("','")+"']");
    } else {
      Logger.log('WARNING: Campaign label does not exist: '+CAMPAIGN_LABEL);
    }
  }
  return selector;
}