function BlogPreview(container) {
  this.container_ = container;
}



BlogPreview.prototype.showBlog = function(url, opt_noTitle) {
  var feed = new google.feeds.Feed(url);
  var preview = this;
  feed.load(function(result) {
    preview.renderBlog_(result, opt_noTitle);
  });
}

BlogPreview.prototype.showTwitter = function(url, opt_noTitle) {
  var feed = new google.feeds.Feed(url);
  var preview = this;
  feed.load(function(result) {
    preview.renderTwitter_(result, opt_noTitle);
  });
}


BlogPreview.prototype.renderBlog_ = function(result, opt_noTitle) {
  if (!result.feed || !result.feed.entries) return;
  while (this.container_.firstChild) {
    this.container_.removeChild(this.container_.firstChild);
  }
var blog = this.container_;
//  var blog = this.createDiv_(this.container_, "column_noticias");
//  if (!opt_noTitle) {
 //   var header = this.createElement_("h2", blog, "");
  //  this.createLink_(header, result.feed.link, result.feed.title);
  //}

  //for (var i = 0; i < result.feed.entries.length; i++) {
  for (var i = 0; i < 2; i++) {
    var entry = result.feed.entries[i];
	var className = "news";
	if (i==1) {
		className += " last_new";
	}
    var div = this.createDiv_(blog, className);
    var linkDiv = this.createSpan_(div, "title", entry.title);

    //this.createLink_(linkDiv, entry.link, entry.title);
   /* if (entry.author) {
      this.createDiv_(div, "author", "Posted by " + entry.author);
    }
    if (entry.publishedDate) {
	this.createDiv_(div, "publish", "Fecha publicacion " + entry.publishedDate);
    }*/

    this.createSpan_(div, "text", entry.contentSnippet);
    var linkref = this.createLink_(div, entry.link, "+ Ver noticia completa");
    linkref.className = "vermas";
    var div = this.createDiv_(div, "clearboth");
	
  }
linkVerMas = this.createLink_(blog, "http://www.i2e.es/blog", "+ Ver todas las noticias");
linkVerMas.className = "vermas_noticias";
}

BlogPreview.prototype.renderTwitter_ = function(result, opt_noTitle) {
	if (!result.feed || !result.feed.entries) {
		return;
	}
	while (this.container_.firstChild) {
		this.container_.removeChild(this.container_.firstChild);
	}
	var twitter = this.container_;
	var i = 0;
	var left = this.createDiv_(twitter, "left");
	//iz
	for(i; i< 2;i++) {
		var entry = result.feed.entries[i];
		var className = "tweet";
		if (i==1) {
			className += " last";
		}
		this.createTweet_(entry,left,className);
	}
	//de
	left = this.createDiv_(twitter, "right");
	for(i; i< 4;i++) {
		var entry = result.feed.entries[i];
		var className = "tweet";
		if (i==3) {
			className += " last";
		}
		this.createTweet_(entry,left,className);
	}
	var div = this.createDiv_(twitter, "clearboth");


}

BlogPreview.prototype.createTweet_ = function(entry,divContendor, divClassName) {
 	var texto = entry.content;
    var tweet = this.createDiv_(divContendor, divClassName);

	var link = this.createLink_(tweet, "http://twitter.com/i2e_es","i2e");
	//tweet.appendChild(document.createTextNode(texto.substring(7)));
	tweet.innerHTML += texto.substring(7)+" ";
	var link2 = this.createLink_(tweet, entry.link,"+ ver tweet");
	var fecha = new Date(entry.publishedDate);
	var spandate = this.createSpan_(tweet,"date",fecha.toLocaleDateString()+" "+fecha.toLocaleTimeString());
}

BlogPreview.prototype.createDiv_ = function(parent, className, opt_text) {
  return this.createElement_("div", parent, className, opt_text);
}

BlogPreview.prototype.createSpan_ = function(parent, className, opt_text) {
  return this.createElement_("span", parent, className, opt_text);
}

BlogPreview.prototype.createLink_ = function(parent, href, text) {
  var link = this.createElement_("a", parent, "", text);
  link.href = href;
  return link;
}

BlogPreview.prototype.createElement_ = function(tagName, parent, className,
                                                opt_text) {
  var div = document.createElement(tagName);
  div.className = className;
  parent.appendChild(div);
  if (opt_text) {
    div.appendChild(document.createTextNode(opt_text));
  }
  return div;
}