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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_View
  * @subpackage Helper
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @version    $Id$
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 
 /** Zend_View_Helper_Placeholder_Container_Standalone */
 // require_once 'Zend/View/Helper/Placeholder/Container/Standalone.php';
 
 /**
  * Helper for setting and retrieving script elements for HTML head section
  *
  * @uses       Zend_View_Helper_Placeholder_Container_Standalone
  * @package    Zend_View
  * @subpackage Helper
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @method $this appendFile($src, $type = 'text/javascript', array $attrs = array())
  * @method $this appendScript($script, $type = 'text/javascript', array $attrs = array())
  * @method $this offsetSetFile($index, $src, $type = 'text/javascript', array $attrs = array())
  * @method $this offsetSetScript($index, $script, $type = 'text/javascript', array $attrs = array())
  * @method $this prependFile($src, $type = 'text/javascript', array $attrs = array())
  * @method $this prependScript($script, $type = 'text/javascript', array $attrs = array())
  * @method $this setFile($src, $type = 'text/javascript', array $attrs = array())
  * @method $this setScript($script, $type = 'text/javascript', array $attrs = array())
  */
 class Zend_View_Helper_HeadScript extends Zend_View_Helper_Placeholder_Container_Standalone
 {
     /**#@+
      * Script type contants
      * @const string
      */
     const FILE   = 'FILE';
     const SCRIPT = 'SCRIPT';
     /**#@-*/
 
     /**
      * Registry key for placeholder
      * @var string
      */
     protected $_regKey = 'Zend_View_Helper_HeadScript';
 
     /**
      * Are arbitrary attributes allowed?
      * @var bool
      */
     protected $_arbitraryAttributes = false;
 
     /**#@+
      * Capture type and/or attributes (used for hinting during capture)
      * @var string
      */
     protected $_captureLock;
     protected $_captureScriptType  = null;
     protected $_captureScriptAttrs = null;
     protected $_captureType;
     /**#@-*/
 
     /**
      * Optional allowed attributes for script tag
      * @var array
      */
     protected $_optionalAttributes = array(
         'charset', 'defer', 'language', 'src'
     );
 
     /**
      * Required attributes for script tag
      * @var string
      */
     protected $_requiredAttributes = array('type');
 
     /**
      * Whether or not to format scripts using CDATA; used only if doctype
      * helper is not accessible
      * @var bool
      */
     public $useCdata = false;
 
     /**
      * Constructor
      *
      * Set separator to PHP_EOL.
      *
      * @return void
      */
     public function __construct()
     {
         parent::__construct();
         $this->setSeparator(PHP_EOL);
     }
 
     /**
      * Return headScript object
      *
      * Returns headScript helper object; optionally, allows specifying a script
      * or script file to include.
      *
      * @param  string $mode Script or file
      * @param  string $spec Script/url
      * @param  string $placement Append, prepend, or set
      * @param  array $attrs Array of script attributes
      * @param  string $type Script type and/or array of script attributes
      * @return Zend_View_Helper_HeadScript
      */
     public function headScript($mode = Zend_View_Helper_HeadScript::FILE, $spec = null, $placement = 'APPEND', array $attrs = array(), $type = 'text/javascript')
     {
         if ((null !== $spec) && is_string($spec)) {
             $action    = ucfirst(strtolower($mode));
             $placement = strtolower($placement);
             switch ($placement) {
                 case 'set':
                 case 'prepend':
                 case 'append':
                     $action = $placement . $action;
                     break;
                 default:
                     $action = 'append' . $action;
                     break;
             }
             $this->$action($spec, $type, $attrs);
         }
 
         return $this;
     }
 
     /**
      * Start capture action
      *
      * @param  mixed $captureType
      * @param  string $typeOrAttrs
      * @return void
      */
     public function captureStart($captureType = Zend_View_Helper_Placeholder_Container_Abstract::APPEND, $type = 'text/javascript', $attrs = array())
     {
         if ($this->_captureLock) {
             // require_once 'Zend/View/Helper/Placeholder/Container/Exception.php';
             $e = new Zend_View_Helper_Placeholder_Container_Exception('Cannot nest headScript captures');
             $e->setView($this->view);
             throw $e;
         }
 
         $this->_captureLock        = true;
         $this->_captureType        = $captureType;
         $this->_captureScriptType  = $type;
         $this->_captureScriptAttrs = $attrs;
         ob_start();
     }
 
     /**
      * End capture action and store
      *
      * @return void
      */
     public function captureEnd()
     {
         $content                   = ob_get_clean();
         $type                      = $this->_captureScriptType;
         $attrs                     = $this->_captureScriptAttrs;
         $this->_captureScriptType  = null;
         $this->_captureScriptAttrs = null;
         $this->_captureLock        = false;
 
         switch ($this->_captureType) {
             case Zend_View_Helper_Placeholder_Container_Abstract::SET:
             case Zend_View_Helper_Placeholder_Container_Abstract::PREPEND:
             case Zend_View_Helper_Placeholder_Container_Abstract::APPEND:
                 $action = strtolower($this->_captureType) . 'Script';
                 break;
             default:
                 $action = 'appendScript';
                 break;
         }
         $this->$action($content, $type, $attrs);
     }
 
     /**
      * Overload method access
      *
      * Allows the following method calls:
      * - appendFile($src, $type = 'text/javascript', $attrs = array())
      * - offsetSetFile($index, $src, $type = 'text/javascript', $attrs = array())
      * - prependFile($src, $type = 'text/javascript', $attrs = array())
      * - setFile($src, $type = 'text/javascript', $attrs = array())
      * - appendScript($script, $type = 'text/javascript', $attrs = array())
      * - offsetSetScript($index, $src, $type = 'text/javascript', $attrs = array())
      * - prependScript($script, $type = 'text/javascript', $attrs = array())
      * - setScript($script, $type = 'text/javascript', $attrs = array())
      *
      * @param  string $method
      * @param  array $args
      * @return Zend_View_Helper_HeadScript
      * @throws Zend_View_Exception if too few arguments or invalid method
      */
     public function __call($method, $args)
     {
         if (preg_match('/^(?P<action>set|(ap|pre)pend|offsetSet)(?P<mode>File|Script)$/', $method, $matches)) {
             if (1 > count($args)) {
                 // require_once 'Zend/View/Exception.php';
                 $e = new Zend_View_Exception(sprintf('Method "%s" requires at least one argument', $method));
                 $e->setView($this->view);
                 throw $e;
             }
 
             $action  = $matches['action'];
             $mode    = strtolower($matches['mode']);
             $type    = 'text/javascript';
             $attrs   = array();
 
             if ('offsetSet' == $action) {
                 $index = array_shift($args);
                 if (1 > count($args)) {
                     // require_once 'Zend/View/Exception.php';
                     $e = new Zend_View_Exception(sprintf('Method "%s" requires at least two arguments, an index and source', $method));
                     $e->setView($this->view);
                     throw $e;
                 }
             }
 
             $content = $args[0];
 
             if (isset($args[1])) {
                 $type = (string) $args[1];
             }
             if (isset($args[2])) {
                 $attrs = (array) $args[2];
             }
 
             switch ($mode) {
                 case 'script':
                     $item = $this->createData($type, $attrs, $content);
                     if ('offsetSet' == $action) {
                         $this->offsetSet($index, $item);
                     } else {
                         $this->$action($item);
                     }
                     break;
                 case 'file':
                 default:
                     if (!$this->_isDuplicate($content) || $action=='set') {
                         $attrs['src'] = $content;
                         $item = $this->createData($type, $attrs);
                         if ('offsetSet' == $action) {
                             $this->offsetSet($index, $item);
                         } else {
                             $this->$action($item);
                         }
                     }
                     break;
             }
 
             return $this;
         }
 
         return parent::__call($method, $args);
     }
 
     /**
      * Is the file specified a duplicate?
      *
      * @param  string $file
      * @return bool
      */
     protected function _isDuplicate($file)
     {
         foreach ($this->getContainer() as $item) {
             if (($item->source === null)
                 && array_key_exists('src', $item->attributes)
                 && ($file == $item->attributes['src']))
             {
                 return true;
             }
         }
         return false;
     }
 
     /**
      * Is the script provided valid?
      *
      * @param  mixed $value
      * @param  string $method
      * @return bool
      */
     protected function _isValid($value)
     {
         if ((!$value instanceof stdClass)
             || !isset($value->type)
             || (!isset($value->source) && !isset($value->attributes)))
         {
             return false;
         }
 
         return true;
     }
 
     /**
      * Override append
      *
      * @param  string $value
      * @return void
      */
     public function append($value)
     {
         if (!$this->_isValid($value)) {
             // require_once 'Zend/View/Exception.php';
             $e = new Zend_View_Exception('Invalid argument passed to append(); please use one of the helper methods, appendScript() or appendFile()');
             $e->setView($this->view);
             throw $e;
         }
 
         return $this->getContainer()->append($value);
     }
 
     /**
      * Override prepend
      *
      * @param  string $value
      * @return void
      */
     public function prepend($value)
     {
         if (!$this->_isValid($value)) {
             // require_once 'Zend/View/Exception.php';
             $e = new Zend_View_Exception('Invalid argument passed to prepend(); please use one of the helper methods, prependScript() or prependFile()');
             $e->setView($this->view);
             throw $e;
         }
 
         return $this->getContainer()->prepend($value);
     }
 
     /**
      * Override set
      *
      * @param  string $value
      * @return void
      */
     public function set($value)
     {
         if (!$this->_isValid($value)) {
             // require_once 'Zend/View/Exception.php';
             $e = new Zend_View_Exception('Invalid argument passed to set(); please use one of the helper methods, setScript() or setFile()');
             $e->setView($this->view);
             throw $e;
         }
 
         return $this->getContainer()->set($value);
     }
 
     /**
      * Override offsetSet
      *
      * @param  string|int $index
      * @param  mixed $value
      * @return void
      */
     public function offsetSet($index, $value)
     {
         if (!$this->_isValid($value)) {
             // require_once 'Zend/View/Exception.php';
             $e = new Zend_View_Exception('Invalid argument passed to offsetSet(); please use one of the helper methods, offsetSetScript() or offsetSetFile()');
             $e->setView($this->view);
             throw $e;
         }
 
         return $this->getContainer()->offsetSet($index, $value);
     }
 
     /**
      * Set flag indicating if arbitrary attributes are allowed
      *
      * @param  bool $flag
      * @return Zend_View_Helper_HeadScript
      */
     public function setAllowArbitraryAttributes($flag)
     {
         $this->_arbitraryAttributes = (bool) $flag;
         return $this;
     }
 
     /**
      * Are arbitrary attributes allowed?
      *
      * @return bool
      */
     public function arbitraryAttributesAllowed()
     {
         return $this->_arbitraryAttributes;
     }
 
     /**
      * Create script HTML
      *
      * @param  string $type
      * @param  array $attributes
      * @param  string $content
      * @param  string|int $indent
      * @return string
      */
     public function itemToString($item, $indent, $escapeStart, $escapeEnd)
     {
         $attrString = '';
         if (!empty($item->attributes)) {
             foreach ($item->attributes as $key => $value) {
                 if ((!$this->arbitraryAttributesAllowed() && !in_array($key, $this->_optionalAttributes))
                     || in_array($key, array('conditional', 'noescape')))
                 {
                     continue;
                 }
                 if ('defer' == $key) {
                     $value = 'defer';
                 }
                 $attrString .= sprintf(' %s="%s"', $key, ($this->_autoEscape) ? $this->_escape($value) : $value);
             }
         }
 
         $addScriptEscape = !(isset($item->attributes['noescape']) && filter_var($item->attributes['noescape'], FILTER_VALIDATE_BOOLEAN));
 
         $type = ($this->_autoEscape) ? $this->_escape($item->type) : $item->type;
         $html  = '<script type="' . $type . '"' . $attrString . '>';
         if (!empty($item->source)) {
             $html .= PHP_EOL ;
 
             if ($addScriptEscape) {
                 $html .= $indent . '    ' . $escapeStart . PHP_EOL;
             }
 
             $html .= $indent . '    ' . $item->source;
 
             if ($addScriptEscape) {
                 $html .= $indent . '    ' . $escapeEnd . PHP_EOL;
             }
 
             $html .= $indent;
         }
         $html .= '</script>';
 
         if (isset($item->attributes['conditional'])
             && !empty($item->attributes['conditional'])
             && is_string($item->attributes['conditional']))
         {
             // inner wrap with comment end and start if !IE
             if (str_replace(' ', '', $item->attributes['conditional']) === '!IE') {
                 $html = '<!-->' . $html . '<!--';
             }
             $html = $indent . '<!--[if ' . $item->attributes['conditional'] . ']>' . $html . '<![endif]-->';
         } else {
             $html = $indent . $html;
         }
 
         return $html;
     }
 
     /**
      * Retrieve string representation
      *
      * @param  string|int $indent
      * @return string
      */
     public function toString($indent = null)
     {
         $indent = (null !== $indent)
                 ? $this->getWhitespace($indent)
                 : $this->getIndent();
 
         if ($this->view) {
             $useCdata = $this->view->doctype()->isXhtml() ? true : false;
         } else {
             $useCdata = $this->useCdata ? true : false;
         }
         $escapeStart = ($useCdata) ? '//<![CDATA[' : '//<!--';
         $escapeEnd   = ($useCdata) ? '//]]>'       : '//-->';
 
         $items = array();
         $this->getContainer()->ksort();
         foreach ($this as $item) {
             if (!$this->_isValid($item)) {
                 continue;
             }
 
             $items[] = $this->itemToString($item, $indent, $escapeStart, $escapeEnd);
         }
 
         $return = implode($this->getSeparator(), $items);
         return $return;
     }
 
     /**
      * Create data item containing all necessary components of script
      *
      * @param  string $type
      * @param  array $attributes
      * @param  string $content
      * @return stdClass
      */
     public function createData($type, array $attributes, $content = null)
     {
         $data             = new stdClass();
         $data->type       = $type;
         $data->attributes = $attributes;
         $data->source     = $content;
         return $data;
     }
 }