Source for file TagCloud.inc
Documentation is available at TagCloud.inc
require_once $config->get('sysRoot'). 'alpha/util/AlphaErrorHandlers.inc';
require_once $config->get('sysRoot'). 'alpha/util/Logger.inc';
require_once $config->get('sysRoot'). 'alpha/model/TagObject.inc';
require_once $config->get('sysRoot'). 'alpha/util/cache/AlphaCacheProviderFactory.inc';
* A widget for rendering a tag cloud, based off the TagObject instances in the
* @package alpha::view::widgets
* @author John Collins <dev@alphaframework.org>
* @version $Id: TagCloud.inc 1468 2011-12-13 19:52:58Z johnc $
* @license http://www.opensource.org/licenses/bsd-license.php The BSD License
* @copyright Copyright (c) 2011, John Collins (founder of Alpha Framework).
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the
* following conditions are met:
* * Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
* * Neither the name of the Alpha Framework nor the names
* of its contributors may be used to endorse or promote
* products derived from this software without specific
* prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
private static $logger = null;
* A hash array of popular tags
private $popTags = array();
* @param $limit The maximum amount of tags to include in the cloud.
* @param $cacheKey Set this optional value to attempt to store the tag cloud array in the available cache for 24hrs (sysCacheProviderName).
self::$logger = new Logger('TagCloud');
if($cacheKey != '' && $config->get('sysCacheProviderName') != '') {
$this->popTags = $cache->get($cacheKey);
// cache look-up failed, so add it for the next time
self::$logger->debug('Cache lookup on the key ['. $cacheKey. '] failed, regenerating popular tags...');
$this->popTags = TagObject::getPopularTagsArray($limit);
$cache->set($cacheKey, $this->popTags, 86400);
$this->popTags = array_slice($this->popTags, 0, $limit);
self::$logger->debug('Cache lookup on the key ['. $cacheKey. '] succeeded');
$this->popTags = TagObject::getPopularTagsArray($limit);
* Render the tag cloud and return all of the HTML links in a single paragraph.
* @param $minLinkSize The minimum font size for any tag link, in points.
* @param $maxLinkSize The maximum font size for any tag link, in points.
* @param $target The target attribute for the links
public function render($minLinkSize= 8, $maxLinkSize= 20, $target= '') {
$linkSize = $this->popTags[$key];
if ($linkSize < $minLinkSize)
$linkSize = $minLinkSize;
if ($linkSize > $maxLinkSize)
$linkSize = $maxLinkSize;
$html .= '<a href="'. $config->get('sysURL'). 'search/q/'. $key. '" style="font-size:'. $linkSize. 'pt;"'. (empty($target) ? '' : ' target="'. $target. '"'). ' rel="tag">'. $key. '</a> ';
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