1: <?php
2: /**
3: * Magento
4: *
5: * NOTICE OF LICENSE
6: *
7: * This source file is subject to the Open Software License (OSL 3.0)
8: * that is bundled with this package in the file LICENSE.txt.
9: * It is also available through the world-wide-web at this URL:
10: * http://opensource.org/licenses/osl-3.0.php
11: * If you did not receive a copy of the license and are unable to
12: * obtain it through the world-wide-web, please send an email
13: * to license@magentocommerce.com so we can send you a copy immediately.
14: *
15: * DISCLAIMER
16: *
17: * Do not edit or add to this file if you wish to upgrade Magento to newer
18: * versions in the future. If you wish to customize Magento for your
19: * needs please refer to http://www.magentocommerce.com for more information.
20: *
21: * @category Mage
22: * @package Mage_Tag
23: * @copyright Copyright (c) 2012 Magento Inc. (http://www.magentocommerce.com)
24: * @license http://opensource.org/licenses/osl-3.0.php Open Software License (OSL 3.0)
25: */
26:
27: /**
28: * Popular tags block
29: *
30: * @category Mage
31: * @package Mage_Tag
32: * @author Magento Core Team <core@magentocommerce.com>
33: */
34:
35: class Mage_Tag_Block_Popular extends Mage_Core_Block_Template
36: {
37:
38: protected $_tags;
39: protected $_minPopularity;
40: protected $_maxPopularity;
41:
42: protected function _loadTags()
43: {
44: if (empty($this->_tags)) {
45: $this->_tags = array();
46:
47: $tags = Mage::getModel('tag/tag')->getPopularCollection()
48: ->joinFields(Mage::app()->getStore()->getId())
49: ->limit(20)
50: ->load()
51: ->getItems();
52:
53: if( count($tags) == 0 ) {
54: return $this;
55: }
56:
57:
58: $this->_maxPopularity = reset($tags)->getPopularity();
59: $this->_minPopularity = end($tags)->getPopularity();
60: $range = $this->_maxPopularity - $this->_minPopularity;
61: $range = ($range == 0) ? 1 : $range;
62: foreach ($tags as $tag) {
63: $tag->setRatio(($tag->getPopularity()-$this->_minPopularity)/$range);
64: $this->_tags[$tag->getName()] = $tag;
65: }
66: ksort($this->_tags);
67: }
68: return $this;
69: }
70:
71: public function getTags()
72: {
73: $this->_loadTags();
74: return $this->_tags;
75: }
76:
77: public function getMaxPopularity()
78: {
79: return $this->_maxPopularity;
80: }
81:
82: public function getMinPopularity()
83: {
84: return $this->_minPopularity;
85: }
86:
87: protected function _toHtml()
88: {
89: if (count($this->getTags()) > 0) {
90: return parent::_toHtml();
91: }
92: return '';
93: }
94: }
95: