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 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Tag
  * @subpackage Cloud
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /**
  * @see Zend_Tag_Item
  */
 // require_once 'Zend/Tag/Item.php';
 
 /**
  * @category   Zend
  * @package    Zend_Tag
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Tag_Cloud
 {
     /**
      * Decorator for the cloud
      *
      * @var Zend_Tag_Cloud_Decorator_Cloud
      */
     protected $_cloudDecorator = null;
 
     /**
      * Decorator for the tags
      *
      * @var Zend_Tag_Cloud_Decorator_Tag
      */
     protected $_tagDecorator = null;
 
     /**
      * List of all tags
      *
      * @var Zend_Tag_ItemList
      */
     protected $_tags = null;
 
     /**
      * Plugin loader for decorators
      *
      * @var Zend_Loader_PluginLoader
      */
     protected $_pluginLoader = null;
 
     /**
      * Option keys to skip when calling setOptions()
      *
      * @var array
      */
     protected $_skipOptions = array(
         'options',
         'config',
     );
 
     /**
      * Create a new tag cloud with options
      *
      * @param mixed $options
      */
     public function __construct($options = null)
     {
         if ($options instanceof Zend_Config) {
             $this->setConfig($options);
         }
 
         if (is_array($options)) {
             $this->setOptions($options);
         }
     }
 
     /**
      * Set options from Zend_Config
      *
      * @param  Zend_Config $config
      * @return Zend_Tag_Cloud
      */
     public function setConfig(Zend_Config $config)
     {
         $this->setOptions($config->toArray());
 
         return $this;
     }
 
     /**
      * Set options from array
      *
      * @param  array $options Configuration for Zend_Tag_Cloud
      * @return Zend_Tag_Cloud
      */
     public function setOptions(array $options)
     {
         if (isset($options['prefixPath'])) {
             $this->addPrefixPaths($options['prefixPath']);
             unset($options['prefixPath']);
         }
 
         foreach ($options as $key => $value) {
             if (in_array(strtolower($key), $this->_skipOptions)) {
                 continue;
             }
 
             $method = 'set' . ucfirst($key);
             if (method_exists($this, $method)) {
                 $this->$method($value);
             }
         }
 
         return $this;
     }
 
     /**
      * Set the tags for the tag cloud.
      *
      * $tags should be an array containing single tags as array. Each tag
      * array should at least contain the keys 'title' and 'weight'. Optionally
      * you may supply the key 'url', to which the tag links to. Any additional
      * parameter in the array is silently ignored and can be used by custom
      * decorators.
      *
      * @param  array $tags
      * @return Zend_Tag_Cloud
      */
     public function setTags(array $tags)
     {
         // Validate and cleanup the tags
         $itemList = $this->getItemList();
 
         foreach ($tags as $tag) {
             if ($tag instanceof Zend_Tag_Taggable) {
                 $itemList[] = $tag;
             } else if (is_array($tag)) {
                 $itemList[] = new Zend_Tag_Item($tag);
             } else {
                 // require_once 'Zend/Tag/Cloud/Exception.php';
                 throw new Zend_Tag_Cloud_Exception('Tag must be an instance of Zend_Tag_Taggable or an array');
             }
         }
 
         return $this;
     }
 
     /**
      * Append a single tag to the cloud
      *
      * @param  Zend_Tag_Taggable|array $tag
      * @return Zend_Tag_Cloud
      */
     public function appendTag($tag)
     {
         $tags = $this->getItemList();
         if ($tag instanceof Zend_Tag_Taggable) {
             $tags[] = $tag;
         } else if (is_array($tag)) {
             $tags[] = new Zend_Tag_Item($tag);
         } else {
             // require_once 'Zend/Tag/Cloud/Exception.php';
             throw new Zend_Tag_Cloud_Exception('Tag must be an instance of Zend_Tag_Taggable or an array');
         }
 
         return $this;
     }
 
     /**
      * Set the item list
      *
      * @param  Zend_Tag_ItemList $itemList
      * @return Zend_Tag_Cloud
      */
     public function setItemList(Zend_Tag_ItemList $itemList)
     {
         $this->_tags = $itemList;
         return $this;
     }
 
     /**
      * Retrieve the item list
      *
      * If item list is undefined, creates one.
      *
      * @return Zend_Tag_ItemList
      */
     public function getItemList()
     {
         if (null === $this->_tags) {
             // require_once 'Zend/Tag/ItemList.php';
             $this->setItemList(new Zend_Tag_ItemList());
         }
         return $this->_tags;
     }
 
     /**
      * Set the decorator for the cloud
      *
      * @param  mixed $decorator
      * @return Zend_Tag_Cloud
      */
     public function setCloudDecorator($decorator)
     {
         $options = null;
 
         if (is_array($decorator)) {
             if (isset($decorator['options'])) {
                 $options = $decorator['options'];
             }
 
             if (isset($decorator['decorator'])) {
                 $decorator = $decorator['decorator'];
             }
         }
 
         if (is_string($decorator)) {
             $classname = $this->getPluginLoader()->load($decorator);
             $decorator = new $classname($options);
         }
 
         if (!($decorator instanceof Zend_Tag_Cloud_Decorator_Cloud)) {
             // require_once 'Zend/Tag/Cloud/Exception.php';
             throw new Zend_Tag_Cloud_Exception('Decorator is no instance of Zend_Tag_Cloud_Decorator_Cloud');
         }
 
         $this->_cloudDecorator = $decorator;
 
         return $this;
     }
 
     /**
      * Get the decorator for the cloud
      *
      * @return Zend_Tag_Cloud_Decorator_Cloud
      */
     public function getCloudDecorator()
     {
         if (null === $this->_cloudDecorator) {
             $this->setCloudDecorator('htmlCloud');
         }
         return $this->_cloudDecorator;
     }
 
     /**
      * Set the decorator for the tags
      *
      * @param  mixed $decorator
      * @return Zend_Tag_Cloud
      */
     public function setTagDecorator($decorator)
     {
         $options = null;
 
         if (is_array($decorator)) {
             if (isset($decorator['options'])) {
                 $options = $decorator['options'];
             }
 
             if (isset($decorator['decorator'])) {
                 $decorator = $decorator['decorator'];
             }
         }
 
         if (is_string($decorator)) {
             $classname = $this->getPluginLoader()->load($decorator);
             $decorator = new $classname($options);
         }
 
         if (!($decorator instanceof Zend_Tag_Cloud_Decorator_Tag)) {
             // require_once 'Zend/Tag/Cloud/Exception.php';
             throw new Zend_Tag_Cloud_Exception('Decorator is no instance of Zend_Tag_Cloud_Decorator_Tag');
         }
 
         $this->_tagDecorator = $decorator;
 
         return $this;
     }
 
     /**
      * Get the decorator for the tags
      *
      * @return Zend_Tag_Cloud_Decorator_Tag
      */
     public function getTagDecorator()
     {
         if (null === $this->_tagDecorator) {
             $this->setTagDecorator('htmlTag');
         }
         return $this->_tagDecorator;
     }
 
     /**
      * Set plugin loaders for use with decorators
      *
      * @param  Zend_Loader_PluginLoader_Interface $loader
      * @return Zend_Tag_Cloud
      */
     public function setPluginLoader(Zend_Loader_PluginLoader_Interface $loader)
     {
         $this->_pluginLoader = $loader;
         return $this;
     }
 
     /**
      * Get the plugin loader for decorators
      *
      * @return Zend_Loader_PluginLoader
      */
     public function getPluginLoader()
     {
         if ($this->_pluginLoader === null) {
             $prefix     = 'Zend_Tag_Cloud_Decorator_';
             $pathPrefix = 'Zend/Tag/Cloud/Decorator/';
 
             // require_once 'Zend/Loader/PluginLoader.php';
             $this->_pluginLoader = new Zend_Loader_PluginLoader(array($prefix => $pathPrefix));
         }
 
         return $this->_pluginLoader;
     }
 
     /**
      * Add many prefix paths at once
      *
      * @param  array $paths
      * @return Zend_Tag_Cloud
      */
     public function addPrefixPaths(array $paths)
     {
         if (isset($paths['prefix']) && isset($paths['path'])) {
             return $this->addPrefixPath($paths['prefix'], $paths['path']);
         }
 
         foreach ($paths as $path) {
             if (!isset($path['prefix']) || !isset($path['path'])) {
                 continue;
             }
 
             $this->addPrefixPath($path['prefix'], $path['path']);
         }
 
         return $this;
     }
 
     /**
      * Add prefix path for plugin loader
      *
      * @param  string $prefix
      * @param  string $path
      * @return Zend_Tag_Cloud
      */
     public function addPrefixPath($prefix, $path)
     {
         $loader = $this->getPluginLoader();
         $loader->addPrefixPath($prefix, $path);
 
         return $this;
     }
 
     /**
      * Render the tag cloud
      *
      * @return string
      */
     public function render()
     {
         $tags = $this->getItemList();
 
         if (count($tags) === 0) {
             return '';
         }
 
         $tagsResult  = $this->getTagDecorator()->render($tags);
         $cloudResult = $this->getCloudDecorator()->render($tagsResult);
 
         return $cloudResult;
     }
 
     /**
      * Render the tag cloud
      *
      * @return string
      */
     public function __toString()
     {
         try {
             $result = $this->render();
             return $result;
         } catch (Exception $e) {
             $message = "Exception caught by tag cloud: " . $e->getMessage()
                      . "\nStack Trace:\n" . $e->getTraceAsString();
             trigger_error($message, E_USER_WARNING);
             return '';
         }
     }
 }