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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_Controller
  * @subpackage Router
  * @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_Controller_Router_Route_Abstract */
 // require_once 'Zend/Controller/Router/Route/Abstract.php';
 
 /**
  * Hostname Route
  *
  * @package    Zend_Controller
  * @subpackage Router
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @see        http://manuals.rubyonrails.com/read/chapter/65
  */
 class Zend_Controller_Router_Route_Hostname extends Zend_Controller_Router_Route_Abstract
 {
 
     /**
      * Host variable
      *
      * @var string
      */
     protected $_hostVariable = ':';
 
     /**
      * Regex delimiter
      *
      * @var string
      */
     protected $_regexDelimiter = '#';
 
     /**
      * Default regex string
      *
      * @var string|null
      */
     protected $_defaultRegex = null;
 
     /**
      * Holds names of all route's pattern variable names. Array index holds a position in host.
      *
      * @var array
      */
     protected $_variables = array();
 
     /**
      * Holds Route patterns for all host parts. In case of a variable it stores it's regex
      * requirement or null. In case of a static part, it holds only it's direct value.
      *
      * @var array
      */
     protected $_parts = array();
 
     /**
      * Holds user submitted default values for route's variables. Name and value pairs.
      *
      * @var array
      */
     protected $_defaults = array();
 
     /**
      * Holds user submitted regular expression patterns for route's variables' values.
      * Name and value pairs.
      *
      * @var array
      */
     protected $_requirements = array();
 
     /**
      * Default scheme
      *
      * @var string
      */
     protected $_scheme = null;
 
     /**
      * Associative array filled on match() that holds matched path values
      * for given variable names.
      *
      * @var array
      */
     protected $_values = array();
 
     /**
      * Current request object
      *
      * @var Zend_Controller_Request_Abstract
      */
     protected $_request;
 
     /**
      * Helper var that holds a count of route pattern's static parts
      * for validation
      *
      * @var int
      */
     private $_staticCount = 0;
 
     /**
      * Set the request object
      *
      * @param  Zend_Controller_Request_Abstract|null $request
      */
     public function setRequest(Zend_Controller_Request_Abstract $request = null)
     {
         $this->_request = $request;
     }
 
     /**
      * Get the request object
      *
      * @return Zend_Controller_Request_Abstract $request
      */
     public function getRequest()
     {
         if ($this->_request === null) {
             // require_once 'Zend/Controller/Front.php';
             $this->_request = Zend_Controller_Front::getInstance()->getRequest();
         }
 
         return $this->_request;
     }
 
     /**
      * Instantiates route based on passed Zend_Config structure
      *
      * @param Zend_Config $config Configuration object
      * @return Zend_Controller_Router_Route_Hostname
      */
     public static function getInstance(Zend_Config $config)
     {
         $reqs   = ($config->reqs instanceof Zend_Config) ? $config->reqs->toArray() : array();
         $defs   = ($config->defaults instanceof Zend_Config) ? $config->defaults->toArray() : array();
         $scheme = (isset($config->scheme)) ? $config->scheme : null;
 
         return new self($config->route, $defs, $reqs, $scheme);
     }
 
     /**
      * Prepares the route for mapping by splitting (exploding) it
      * to a corresponding atomic parts. These parts are assigned
      * a position which is later used for matching and preparing values.
      *
      * @param string $route    Map used to match with later submitted hostname
      * @param array  $defaults Defaults for map variables with keys as variable names
      * @param array  $reqs     Regular expression requirements for variables (keys as variable names)
      * @param string $scheme
      */
     public function __construct($route, $defaults = array(), $reqs = array(), $scheme = null)
     {
         $route               = trim($route, '.');
         $this->_defaults     = (array) $defaults;
         $this->_requirements = (array) $reqs;
         $this->_scheme       = $scheme;
 
         if ($route != '') {
             foreach (explode('.', $route) as $pos => $part) {
                 if (substr($part, 0, 1) == $this->_hostVariable) {
                     $name                   = substr($part, 1);
                     $this->_parts[$pos]     = (isset($reqs[$name]) ? $reqs[$name] : $this->_defaultRegex);
                     $this->_variables[$pos] = $name;
                 } else {
                     $this->_parts[$pos] = $part;
                     $this->_staticCount++;
                 }
             }
         }
     }
 
     /**
      * Matches a user submitted path with parts defined by a map. Assigns and
      * returns an array of variables on a successful match.
      *
      * @param Zend_Controller_Request_Http $request Request to get the host from
      * @return array|false An array of assigned values or a false on a mismatch
      */
     public function match($request)
     {
         // Check the scheme if required
         if ($this->_scheme !== null) {
             $scheme = $request->getScheme();
 
             if ($scheme !== $this->_scheme) {
                 return false;
             }
         }
 
         // Get the host and remove unnecessary port information
         $host = $request->getHttpHost();
         if (preg_match('#:\d+$#', $host, $result) === 1) {
             $host = substr($host, 0, -strlen($result[0]));
         }
 
         $hostStaticCount = 0;
         $values          = array();
 
         $host = trim($host, '.');
 
         if ($host != '') {
             $host = explode('.', $host);
 
             foreach ($host as $pos => $hostPart) {
                 // Host is longer than a route, it's not a match
                 if (!array_key_exists($pos, $this->_parts)) {
                     return false;
                 }
 
                 $name     = isset($this->_variables[$pos]) ? $this->_variables[$pos] : null;
                 $hostPart = urldecode($hostPart);
 
                 // If it's a static part, match directly
                 if ($name === null && $this->_parts[$pos] != $hostPart) {
                     return false;
                 }
 
                 // If it's a variable with requirement, match a regex. If not - everything matches
                 if ($this->_parts[$pos] !== null
                     && !preg_match(
                         $this->_regexDelimiter . '^' . $this->_parts[$pos] . '$' . $this->_regexDelimiter . 'iu',
                         $hostPart
                     )
                 ) {
                     return false;
                 }
 
                 // If it's a variable store it's value for later
                 if ($name !== null) {
                     $values[$name] = $hostPart;
                 } else {
                     $hostStaticCount++;
                 }
             }
         }
 
         // Check if all static mappings have been matched
         if ($this->_staticCount != $hostStaticCount) {
             return false;
         }
 
         $return = $values + $this->_defaults;
 
         // Check if all map variables have been initialized
         foreach ($this->_variables as $var) {
             if (!array_key_exists($var, $return)) {
                 return false;
             }
         }
 
         $this->_values = $values;
 
         return $return;
     }
 
     /**
      * Assembles user submitted parameters forming a hostname defined by this route
      *
      * @param  array   $data  An array of variable and value pairs used as parameters
      * @param  boolean $reset Whether or not to set route defaults with those provided in $data
      * @param  boolean $encode
      * @param  boolean $partial
      * @throws Zend_Controller_Router_Exception
      * @return string Route path with user submitted parameters
      */
     public function assemble($data = array(), $reset = false, $encode = false, $partial = false)
     {
         $host = array();
         $flag = false;
 
         foreach ($this->_parts as $key => $part) {
             $name = isset($this->_variables[$key]) ? $this->_variables[$key] : null;
 
             $useDefault = false;
             if (isset($name) && array_key_exists($name, $data) && $data[$name] === null) {
                 $useDefault = true;
             }
 
             if (isset($name)) {
                 if (isset($data[$name]) && !$useDefault) {
                     $host[$key] = $data[$name];
                     unset($data[$name]);
                 } elseif (!$reset && !$useDefault && isset($this->_values[$name])) {
                     $host[$key] = $this->_values[$name];
                 } elseif (isset($this->_defaults[$name])) {
                     $host[$key] = $this->_defaults[$name];
                 } else {
                     // require_once 'Zend/Controller/Router/Exception.php';
                     throw new Zend_Controller_Router_Exception($name . ' is not specified');
                 }
             } else {
                 $host[$key] = $part;
             }
         }
 
         $return = '';
 
         foreach (array_reverse($host, true) as $key => $value) {
             if ($flag || !isset($this->_variables[$key]) || $value !== $this->getDefault($this->_variables[$key])
                 || $partial
             ) {
                 if ($encode) {
                     $value = urlencode($value);
                 }
                 $return = '.' . $value . $return;
                 $flag   = true;
             }
         }
 
         $url = trim($return, '.');
 
         if ($this->_scheme !== null) {
             $scheme = $this->_scheme;
         } else {
             $request = $this->getRequest();
             if ($request instanceof Zend_Controller_Request_Http) {
                 $scheme = $request->getScheme();
             } else {
                 $scheme = 'http';
             }
         }
 
         $url = $scheme . '://' . $url;
 
         return $url;
     }
 
     /**
      * Return a single parameter of route's defaults
      *
      * @param string $name Array key of the parameter
      * @return string Previously set default
      */
     public function getDefault($name)
     {
         if (isset($this->_defaults[$name])) {
             return $this->_defaults[$name];
         }
 
         return null;
     }
 
     /**
      * Return an array of defaults
      *
      * @return array Route defaults
      */
     public function getDefaults()
     {
         return $this->_defaults;
     }
 
     /**
      * Get all variables which are used by the route
      *
      * @return array
      */
     public function getVariables()
     {
         return $this->_variables;
     }
 }