vBulletin CMS Widgets - United-Forum Nivo Slider Widget

Based on the Nivo Slider - all credit for slider awesomeness goes to them.
vB4 implementation goes to me.


What it is:
A slider for cms articles, it gets the articles via database, uses (if possible) the previewimage there and resizes it to slider size *update 1.1.0 cropping function included.

Livedemo on a Big Board (>2.000.000 posts)
the nivo slider on our site is customized to fit our heavily customized cms. Default look of this addon is shown in the picture below


facts about the nivo slider

Originally Posted by nivo slider homepage

- ~ 600.000 downloads
- 16 transition effects
- a ton of options
- different available themes
- ...

Installation

• upload all files (attached zip file) in the folder where you do need them - this has to be the same folder you will set via $slider_img_filepath (see picture)
  
  
  
• create a new php-widget and insert the following code:
  

  // DEBUG MODUS !
  $debug_modus = false;
  
  if($debug_modus === false)
  {
  	ob_start();
  }
  
  //nivo slider - uf - vb.org version
  //set these values as you need them:
  
  //your slider folder - has to be read and writeable
  //folder where all slider files are saved
  $slider_img_filepath = 'external/unitedforum/slider/';   
  
  //picture width and height !same as in the CSS FILE!
  $maxwidth = 650;                                  
  $maxheight = 250;    
  
  //do you want images without previewimage to be shown? slider is using the fallback then
  $show_articles_without_image = false;           
  
  //picture shown if your articles has no previewpicture
  $fallback_img = $slider_img_filepath . 'uf_fallback_slider.png';  
  
  //hardcoded maximum is 20 - if you want more just ask
  $number_of_articles_shown = 10;                                
              
  //lengh in characters of the article descriptions
  $description_length = 95;
  
  //stretch picture or crop them? false = strechting (default) true = cropping (beta)
  $crop = false;
  
  
  //Debug Messages
  if($debug_modus)
  {
  	echo "<span style='color:red;'>DEBUG MODE is ON! </span><br />";
  	echo "slider_img_filepath: $slider_img_filepath <br />";
  	echo "width: $maxwidth   height: $maxheight <br />";
  	echo "Strech or Crop? $crop <br />";
  	echo "show_articles_without_image: "; 
          var_dump($show_articles_without_image); 
          echo " <br />";
  	echo "fallback_img: $fallback_img <br />";
  	echo "#img: $number_of_articles_shown <br />";
  	echo "description_length: $description_length <br />";
  	echo 'directory ' . DIR . '<br />';
  
  }
  
  
  
  
  $article_type = vb_Types::instance()->getContentTypeID("vBCms_Article");
  $time = TIMENOW;
   
  if(!extension_loaded('gd'))
  {
  	echo '<span style="color:red">Error occurred:</span> Your System does not support the GD-Libary. Please install the GD-Libary.<br />';
  }
         
  	$article_get = vB::$db->query_read('
          SELECT
              article.pagetext,
              article.previewimage,
              node.url,
              node.publishdate,
              node.parentnode,
              parentnode.url AS parenturl,
              thread.replycount,
              info.title,
              node.nodeid,            
              GROUP_CONCAT( category.category )
          FROM
              '.TABLE_PREFIX.'cms_article AS article INNER JOIN
              '.TABLE_PREFIX.'cms_node AS node 
                  ON (node.contentid = article.contentid AND node.contenttypeid = ' . vb::$db->sql_prepare($article_type) .') INNER JOIN
              '.TABLE_PREFIX.'cms_nodeinfo AS info 
                  ON info.nodeid = node.nodeid INNER JOIN
              '.TABLE_PREFIX.'cms_node AS parentnode 
                  ON parentnode.nodeid = node.parentnode LEFT JOIN
              '.TABLE_PREFIX.'thread AS thread ON thread.threadid = info.associatedthreadid LEFT JOIN
              '.TABLE_PREFIX.'cms_nodecategory AS nodecategory ON nodecategory.nodeid = node.nodeid LEFT JOIN
              '.TABLE_PREFIX.'cms_category AS category ON nodecategory.categoryid = category.categoryid 
          WHERE
              node.setpublish = 1 AND
              node.publishdate > '. vb::$db->sql_prepare($time) .' -34560000 AND
  			node.publishdate < '. vb::$db->sql_prepare($time) .' 
          GROUP BY node.nodeid
          ORDER BY node.publishdate
          DESC LIMIT 20');
  
      $database_articles = array();
      
      /* my version of sorting the articles via relevance - i'll keep it in case someone is interested*/
      while($article = vB::$db->fetch_array($article_get))
      {
          $article['value'] = ( 5 - ($time - $article['publishdate'] ) / 86400 ) * ( 5 - ($time - $article['publishdate'] ) / 86400 ) * ( 5 - ($time - $article['publishdate'] ) / 86400 ) + (10 * $article['replycount']);
          $database_articles[] = $article;        
      }
      
      foreach($database_articles as $c => $key)
      {
          $sort_value[] = $key['value'];
      }
      
      array_multisort($sort_value, SORT_DESC, $database_articles);    
      
      //
      $i = 0;
      $section_array = array();
      $featured_articles = array();
  	
      foreach($database_articles AS $article)
      {
          $section_array[$article['parentnode']]++;
  
          $categories = explode(',' , $article['GROUP_CONCAT( category.category )']);
       
          if($show_articles_without_image == true OR $article['previewimage'])
          {
              if($section_array[$article['parentnode']] < 50 AND $i < $number_of_articles_shown)
              {
  				if($debug_modus == true OR !file_exists($slider_img_filepath . 'slide_' . $article['nodeid'] . '.jpg'))
  				{
  					//rebuild image to the height and width we want in the slider 
  					//called sprite since i got the code from our sprite addon :P
  					$sprite = imagecreatetruecolor($maxwidth, $maxheight);
  					if(is_resource($sprite) AND $article['previewimage'] )
  					{                   				
  						$imageinfo = getimagesize($article['previewimage']);
  						if(is_array($imageinfo))
  						{   
  							$image = null;
  							switch($imageinfo[2])
  							{
  								case IMAGETYPE_PNG:
  								$image = imagecreatefrompng($article['previewimage']);
  								break;
  								case IMAGETYPE_GIF:
  								$image = imagecreatefromgif($article['previewimage']);
  								break;
  								case IMAGETYPE_JPEG:
  								$image = imagecreatefromjpeg($article['previewimage']);
  								break;
  								default:
  								echo '<span style="color:red">Error occurred:</span> Unknown image format. ' . $article['previewimage']. '<br />';
  								break;                        
  							}
  							
  							if(!is_resource($image))
  							{
  								//resiziing did not work - we are using the fallback image.
  								echo '<span style="color:red">Error occurred:</span> imagecreation failed. ' . $article['previewimage']. '<br />';
  								$article['previewimage'] = $fallback_img;
  							}
  							else
  							{
  								$img_width = $imageinfo[0];
  								$img_height = $imageinfo[1];							
  								
  								if($crop == false)
  								{									
  									imagecopyresampled($sprite, $image, 0, 0, 0, 0, $maxwidth, $maxheight, $img_width, $img_height );
  									imagedestroy($image);
  								}
  								else
  								{
  									//cropping
  									$ratiox = $maxheight / $img_height ;
  									$ratioy = $maxwidth / $img_width ;
  									$new_height = $img_height;
  									$new_width = $img_width;
  									
  									if ($maxheight > $img_height OR $maxwidth > $img_width)
  									{
  										if($ratiox > $ratioy)
  										{
  											$new_height = round($img_height * $ratiox);
  											$new_width = round($img_width * $ratiox);
  										}
  										else
  										{
  											$new_height = round($img_height * $ratioy);
  											$new_width = round($img_width * $ratioy);
  										}										
  									}
  									$cropx = $new_height - $maxheight;
  									$cropy = $new_width - $maxwidth;
  									
  									imagecopyresampled($sprite, $image, 0, 0, 0, 0, $new_width, $new_height, $img_width, $img_height);
  									imagedestroy($image);
  									
  								}
  								
  								
  								$img_filepath = $slider_img_filepath . 'slide_' . $article['nodeid'] . '.jpg';
  								$success = imagejpeg($sprite, DIR  . ($img_filepath[0] != DIRECTORY_SEPARATOR ?  DIRECTORY_SEPARATOR : '') . $img_filepath);
  								imagedestroy($sprite);
  								if($success)
  								{
  									$article['previewimage'] = $img_filepath;
  								}
  								else
  								{
  									$img_filepath = DIR  . ($img_filepath[0] != DIRECTORY_SEPARATOR ?  DIRECTORY_SEPARATOR : '') . $img_filepath;
  									echo '<span style="color:red">Error occurred:</span> imagejpeg failed. ' . $article['previewimage']. '<br />
  									directory: '. $img_filepath ;
  									
  									$article['previewimage'] = $fallback_img;
  								}
  							}
  							
  						}
  						else
  						{
  							//resiziing did not work - we are using the fallback image.
  							echo '<span style="color:red">Error occurred:</span> picture is not readable.' . $article['previewimage']. '<br /> ';
  							$article['previewimage'] = $fallback_img;
  						}                  
  					}
  					else
  					{
  						//resiziing did not work - we are using the fallback image.
  						echo '<span style="color:red">Warning:</span> article has no previewimage or sprite is no ressource. ' . $article['previewimage']. '<br />';
  						$article['previewimage'] = $fallback_img;
  					}
  				}
  				else
  				{
  					//we already have the image, no need to resize or crop anything
  					$article['previewimage'] = $slider_img_filepath . 'slide_' . $article['nodeid'] . '.jpg';
  				}
  
                  /*remove everything from the previewtext - html and bb. I do not want bold or colored text there. Cut to a decent length.*/        
                  $article['pagetext'] = strip_bbcode($article['pagetext'], true, true, false, true, false);
  
                  $article['previewtext'] = strip_tags($article['pagetext'], '<a>');
                      
                  $len = $description_length;
                  if ( strlen($article['previewtext']) > $len )
                  {                    
                      $article['previewtext'] = substr( $article['previewtext'] , 0 , strrpos( substr( $article['previewtext'], 0, $len), ' ' ));
                  }   
  
                  $i++;
                  //Build Array
                  $article_neu = array();
                  $article_neu['description'] = '<h2 style="font-weight:bold; font-size: 14px">'. $article['title'].'</h2><span>'. $article['previewtext'] .'</span> <a href="/content.php?r=' . $article['nodeid'] . '-' . $article['url'] . '">read on</a>';
                  $article_neu['htmlcaptionname'] = 'htmlcaption' . $article['nodeid'] ;
                  $article_neu['picture'] = '<a href="/content.php?r=' . $article['nodeid'] . '-' . $article['url'] . '"><img src="'.$article['previewimage'].'" alt="" title="#htmlcaption'. $article['nodeid'] . '" /></a>';
                  
                  $featured_articles[] = $article_neu;
              }
          }
      }
      
      //Randomize Array
      //shuffle($featured_articles);
  
  	//Debug Messages
  	if($debug_modus)
  	{
  		echo '#articles - featured and databasepull ';
  		var_dump(count($featured_articles));
  		var_dump(count($database_articles));
  	}
  
      
  $output_bits = '
      <link rel="stylesheet" href="' .$slider_img_filepath. 'nivo-slider.css" type="text/css" media="screen" />
      <link rel="stylesheet" href="' .$slider_img_filepath. 'nivo-slider_uf_theme.css" type="text/css" media="screen" />
      <div style="height:' . $maxheight . 'px;">
      <div id="wrapper">
          <div class="slider-wrapper theme-uf">
              <div class="ribbon"></div>
              <div id="slider" class="nivoSlider">';
              
                  foreach($featured_articles AS $article)
                  {
                      $output_bits .= $article['picture'];
                  }
              $output_bits .= '
              </div>';
              
              foreach($featured_articles AS $article)
              {
                  $output_bits .= '<div id="' . $article['htmlcaptionname'] . '" class="nivo-html-caption">' . $article['description'] .'</div>';
              }
              
              $output_bits .= '         
          </div>
  
      </div>
      <script type="text/javascript" src="' .$slider_img_filepath. 'jquery-1.6.1.min.js"></script>
      <script type="text/javascript" src="' .$slider_img_filepath. 'jquery.nivo.slider.pack.js"></script>
      <script type="text/javascript">
      $(window).load(function() {
          $("#slider").nivoSlider();
      });
      </script>
      </div>
      ';
          $output = $output_bits;
   
  if($debug_modus === false)
  {
  	ob_end_clean();        
  }

• set refresh time to something big!
• save - add the widget to your layout - enjoy

Custom settings:

At the top of the php-widget code you can see the following:

// DEBUG MODUS !
$debug_modus = false;

if($debug_modus === false)
{
	ob_start();
}

//nivo slider - uf - vb.org version
//set these values as you need them:

//your slider folder - has to be read and writeable
//folder where all slider files are saved
$slider_img_filepath = 'external/unitedforum/slider/';   

//picture width and height !same as in the CSS FILE!
$maxwidth = 650;                                  
$maxheight = 250;    

//do you want images without previewimage to be shown? slider is using the fallback then
$show_articles_without_image = false;           

//picture shown if your articles has no previewpicture
$fallback_img = $slider_img_filepath . 'uf_fallback_slider.png';  

//hardcoded maximum is 20 - if you want more just ask
$number_of_articles_shown = 5;                                
            
//lengh in characters of the article descriptions
$description_length = 95;

If you change $maxwidth and $maxheight you need to edit the nivo-slider_uf_theme.css file, here:

.theme-uf #slider {
    margin:0px auto 0 auto;
    width:650px; /* Make sure your images are the same size */
    height:250px; /* Make sure your images are the same size */
}

Width and height have to be the same value in your php-widget and in the css file.

In additon to these settings i also included a "value/relevance function". Meaning the slider doesn't show your latest 5 articles, but instead weights them based on age and comments.

As older an article is the less likely it will show up in the slider.
More comments make it more likely.

This behaviour can be easily changed. I didn't include an if condition cause every board has different needs and i don't know whats best for you.
In addition conditions like "articles just from this section - or these sections, or this category, with a minimum of 10 posts" can be included via one single if condition. Again, i don't know what your board needs or what your category names are.

You can also modify the preview length (more words, less words), the preview style (color fontsize, fontweight .... Again different forums different needs. It's highly customizable.

Support:

Support and requests for the slider itself should be asked here http://nivo.dev7studios.com/
Same goes for different slider themes - a lot is possible, even thumbnails - again this is part of the nivo slider and not the vb4 implementation.

If you have any questions regarding the settings - or want different settings (which have to do with vb4) - ask, and i'll try to come up with some code // show you where you have to put what.

Slider not working. No idea why?

You will find a FAQ in the first comment, which will be kept up to date:
FAQ

The widget here is completely free. No charge, no branding.
But, we do not mind donations either. If you want to give us something. Since we are advertising free and fan based we are happy about every small donation.
( On Forumhome bottom right paypal button: http://www.united-forum.de/forum.php )



That's all
Hope it works for you.
Regards Mooff

[Mooff]

Please try switching allow_url_include to ON aswell. It's got to be one of those two.

[Kr33p3r]

Same result, sadly.

allow_url_include On On

DEBUG MODE is ON! 
slider_img_filepath: slider/ 
width: 650 height: 250 
show_articles_without_image: bool(false) 
fallback_img: slider/uf_fallback_slider.png 
#img: 5 
description_length: 95 
directory /home/straleyw/public_html/cp/forums
Error occurred: picture is not readable.slider/uf_fallback_slider.png
#articles - featured and databasepull int(1) int(1)

[The Rocketeer]

Originally Posted by Kr33p3r

Same result, sadly.

allow_url_include On On

DEBUG MODE is ON! 
slider_img_filepath: slider/ 
width: 650 height: 250 
show_articles_without_image: bool(false) 
fallback_img: slider/uf_fallback_slider.png 
#img: 5 
description_length: 95 
directory /home/straleyw/public_html/cp/forums
Error occurred: picture is not readable.slider/uf_fallback_slider.png
#articles - featured and databasepull int(1) int(1)

Hey Kr33p3r, I see you are having a problem with the fallback or source image, I had the same issue, cant remember how I solved it but might be something in the first few pages.

Anyway, I just visited your site and I wanted to ask. Can you share with us the code / edits that makes the articles appear so neatly on your CMS? Inside the green line below ?



I have been long waiting for such a nice flow, and I think me and a lot of others using the vbulletin CMS would certainly benefit from having it.

Edit: not trying to steal your code, just the way your articles are displayed on the home page / blog roll. You know all images nicely at the left, and the info on the right. It looks perfect!

[Gamelobby]

@ Rocketeer..
That looks like the default CMS design..!?
You dont need a slider for that.

Originally Posted by Mooff

@Gamelobby
I'm not sure i understand what your question is.
This addon provides a bridge between vb4 articles and the nivo slider. Therefore it is an article slider widget.
The image which the CMS automatically pulls from the article is used for the slider.
If it doesn't right now do that in your case please refer to post 227.

Originally Posted by Mooff

Seems like error messages are suppressed in your php settings.

Some questions for you guys then:
- Is the slider folder writeable for your webserver?
- Do you have the php GD libary installed?
- Is allow_url_access set to false in your php settings?

@Gamelobby
The slider does pull your article preview images and automatically resizes and saves them to the slider folder.

I'm not sure, how/where do i check this..? (is it in the widget.?)

Here is what i found.. (this part is untouched from what you have above, that we are supposed to put in php widget)

//Debug Messages
if($debug_modus)
{
	echo "<span style='color:red;'>DEBUG MODE is ON! </span><br />";
	echo "slider_img_filepath: $slider_img_filepath <br />";
	echo "width: $maxwidth   height: $maxheight <br />";
	echo "show_articles_without_image: "; 
        var_dump($show_articles_without_image); 
        echo " <br />";
	echo "fallback_img: $fallback_img <br />";
	echo "#img: $number_of_articles_shown <br />";
	echo "description_length: $description_length <br />";
	echo 'directory ' . DIR . '<br />';

}

Here is what i get..
The UF image with my article text:




ALSO..
I just noticed that when i click on an image it takes me to the wrong url.. its not showing the"forum" folder in the path.?

http://www.mysite.com/content.php?r=251

Should be:

http://www.mysite.com/forum/content.php?r=251

Could that be part of the problem.?

[The Rocketeer]

Originally Posted by Gamelobby

@ Rocketeer..
That looks like the default CMS design..!?
You dont need a slider for that.

Nope, That's not the default CMS design.
I was talking about the article display design he had. Its custom.

I am not asking about the slider if you had read my post carefully I said I already had the slider installed (one of the first installs btw) and that others who are having the same issues as I had should look back in the first few pages

Anyhow to the OP, I am just wanting to know about his article display design. Go look at the default vB article layout, its messed up compared to his. Look at the articles 1x1 in a blog roll image above, examine the area I placed in Green.

[Mooff]

That doesn't look like a vb4-cms at all. Judgeding from the code i severly doubt it is one.

@Gamelobby
The wrong link to the articles has nothing to do with where the slider wants to save the images. Per default i'm asuming the content.php resides in the main http folder and not in a subfolder. Anyway, for that to work correctly

search in the php widget code

                //Build Array
                $article_neu = array();
                $article_neu['description'] = '<h2 style="font-weight:bold; font-size: 14px">'. $article['title'].'</h2><span>'. $article['previewtext'] .'</span> <a href="/content.php?r=' . $article['nodeid'] . '-' . $article['url'] . '">read on</a>';
                $article_neu['htmlcaptionname'] = 'htmlcaption' . $i ;
                $article_neu['picture'] = '<a href="/content.php?r=' . $article['nodeid'] . '-' . $article['url'] . '"><img src="'.$article['previewimage'].'" alt="" title="#htmlcaption'. $i . '" /></a>';

and replace with this code

                //Build Array
                $article_neu = array();
                $article_neu['description'] = '<h2 style="font-weight:bold; font-size: 14px">'. $article['title'].'</h2><span>'. $article['previewtext'] .'</span> <a href="/Forum/content.php?r=' . $article['nodeid'] . '-' . $article['url'] . '">read on</a>';
                $article_neu['htmlcaptionname'] = 'htmlcaption' . $i ;
                $article_neu['picture'] = '<a href="/Forum/content.php?r=' . $article['nodeid'] . '-' . $article['url'] . '"><img src="'.$article['previewimage'].'" alt="" title="#htmlcaption'. $i . '" /></a>';

As for the other question why the images do not show up. Can you please post the debug messages the slider puts out in debug mode?
As for checking how to find out whether fopen/ allow_url_open is active or not. I would have to google that aswell. Best is to ask your techadmin, since he is the guy who would need to activate it.

@Kr33p3r
I'll try to come up with a version on monday which pumps out a bit more debug to see what is going on there. Kinda lost right now.

[Gamelobby]

Yea, I meant it looks like just a default CMS layout. (1 Column & Sidebar) He just has articles on the left, & sidebar on the right... as far as i can tell. (If it's not default we can easily make that layout, cant we.?)

That's why i said you dont need a slider for that.
I knew it wasn't the slider. lol

[Gamelobby]

Originally Posted by Mooff

@Gamelobby
The wrong link to the articles has nothing to do with where the slider wants to save the images. Per default i'm asuming the content.php resides in the main http folder and not in a subfolder. Anyway, for that to work correctly

search in the php widget code

                //Build Array
                $article_neu = array();
                $article_neu['description'] = '<h2 style="font-weight:bold; font-size: 14px">'. $article['title'].'</h2><span>'. $article['previewtext'] .'</span> <a href="/content.php?r=' . $article['nodeid'] . '-' . $article['url'] . '">read on</a>';
                $article_neu['htmlcaptionname'] = 'htmlcaption' . $i ;
                $article_neu['picture'] = '<a href="/content.php?r=' . $article['nodeid'] . '-' . $article['url'] . '"><img src="'.$article['previewimage'].'" alt="" title="#htmlcaption'. $i . '" /></a>';

and replace with this code

                //Build Array
                $article_neu = array();
                $article_neu['description'] = '<h2 style="font-weight:bold; font-size: 14px">'. $article['title'].'</h2><span>'. $article['previewtext'] .'</span> <a href="/Forum/content.php?r=' . $article['nodeid'] . '-' . $article['url'] . '">read on</a>';
                $article_neu['htmlcaptionname'] = 'htmlcaption' . $i ;
                $article_neu['picture'] = '<a href="/Forum/content.php?r=' . $article['nodeid'] . '-' . $article['url'] . '"><img src="'.$article['previewimage'].'" alt="" title="#htmlcaption'. $i . '" /></a>';

As for the other question why the images do not show up. Can you please post the debug messages the slider puts out in debug mode?
As for checking how to find out whether fopen/ allow_url_open is active or not. I would have to google that aswell. Best is to ask your techadmin, since he is the guy who would need to activate it.

Linksd are fixed. Thanks.



How do i do Debug mode.?
&
Who is my techadmin.? (Is that my hosting.?)

[Mooff]

Designwise it is possible, but it's not easy to force the vb4-cms to look decent. :P

Your techadmin is the guy who does all the coding on your board. Judgeding by your question you are. :P

Please set the slider to debug mode (last FAQ question) and post the output, something might show up what can help us to solve your problem.

[Gamelobby]

Yup i guess that would be me. lol


Here is what i got.

Warning: imagejpeg() [function.imagejpeg]: Unable to open '[path]/Forum/slider/slide_0.jpg' for writing: No such file or directory in [path]/packages/vbcms/widget/execphp.php(191) : eval()'d code on line 163
Error occurred: imagejpeg failed. http://image.gamespotcdn.net/gamespo...4416_embed.jpg
directory: /home/content/08/4856008/html/gamelobby/Forum/Forum/slider/slide_0.jpg
Warning: imagejpeg() [function.imagejpeg]: Unable to open '[path]/Forum/slider/slide_1.jpg' for writing: No such file or directory in [path]/packages/vbcms/widget/execphp.php(191) : eval()'d code on line 163
Error occurred: imagejpeg failed. http://l.yimg.com/a/p/sp/tools/med/2...1314751955.jpg
directory: /home/content/08/4856008/html/gamelobby/Forum/Forum/slider/slide_1.jpg
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