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Token.php
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Token.php
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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2013 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Config\Processor;
use Traversable;
use Zend\Config\Config;
use Zend\Config\Exception;
class Token implements ProcessorInterface
{
/**
* Token prefix.
*
* @var string
*/
protected $prefix = '';
/**
* Token suffix.
*
* @var string
*/
protected $suffix = '';
/**
* The registry of tokens
*
* @var array
*/
protected $tokens = array();
/**
* Replacement map
*
* @var array
*/
protected $map = null;
/**
* Token Processor walks through a Config structure and replaces all
* occurrences of tokens with supplied values.
*
* @param array|Config|Traversable $tokens Associative array of TOKEN => value
* to replace it with
* @param string $prefix
* @param string $suffix
* @internal param array $options
* @return Token
*/
public function __construct($tokens = array(), $prefix = '', $suffix = '')
{
$this->setTokens($tokens);
$this->setPrefix($prefix);
$this->setSuffix($suffix);
}
/**
* @param string $prefix
* @return Token
*/
public function setPrefix($prefix)
{
// reset map
$this->map = null;
$this->prefix = $prefix;
return $this;
}
/**
* @return string
*/
public function getPrefix()
{
return $this->prefix;
}
/**
* @param string $suffix
* @return Token
*/
public function setSuffix($suffix)
{
// reset map
$this->map = null;
$this->suffix = $suffix;
return $this;
}
/**
* @return string
*/
public function getSuffix()
{
return $this->suffix;
}
/**
* Set token registry.
*
* @param array|Config|Traversable $tokens Associative array of TOKEN => value
* to replace it with
* @return Token
* @throws Exception\InvalidArgumentException
*/
public function setTokens($tokens)
{
if (is_array($tokens)) {
$this->tokens = $tokens;
} elseif ($tokens instanceof Config) {
$this->tokens = $tokens->toArray();
} elseif ($tokens instanceof Traversable) {
$this->tokens = array();
foreach ($tokens as $key => $val) {
$this->tokens[$key] = $val;
}
} else {
throw new Exception\InvalidArgumentException('Cannot use ' . gettype($tokens) . ' as token registry.');
}
// reset map
$this->map = null;
return $this;
}
/**
* Get current token registry.
*
* @return array
*/
public function getTokens()
{
return $this->tokens;
}
/**
* Add new token.
*
* @param string $token
* @param mixed $value
* @return Token
* @throws Exception\InvalidArgumentException
*/
public function addToken($token, $value)
{
if (!is_scalar($token)) {
throw new Exception\InvalidArgumentException('Cannot use ' . gettype($token) . ' as token name.');
}
$this->tokens[$token] = $value;
// reset map
$this->map = null;
return $this;
}
/**
* Add new token.
*
* @param string $token
* @param mixed $value
* @return Token
*/
public function setToken($token, $value)
{
return $this->addToken($token, $value);
}
/**
* Build replacement map
*/
protected function buildMap()
{
if (!$this->suffix && !$this->prefix) {
$this->map = $this->tokens;
} else {
$this->map = array();
foreach ($this->tokens as $token => $value) {
$this->map[$this->prefix . $token . $this->suffix] = $value;
}
}
}
/**
* Process
*
* @param Config $config
* @return Config
* @throws Exception\InvalidArgumentException
*/
public function process(Config $config)
{
if ($config->isReadOnly()) {
throw new Exception\InvalidArgumentException('Cannot process config because it is read-only');
}
if ($this->map === null) {
$this->buildMap();
}
/**
* Walk through config and replace values
*/
$keys = array_keys($this->map);
$values = array_values($this->map);
foreach ($config as $key => $val) {
if ($val instanceof Config) {
$this->process($val);
} else {
$config->$key = str_replace($keys, $values, $val);
}
}
return $config;
}
/**
* Process a single value
*
* @param $value
* @return mixed
*/
public function processValue($value)
{
if ($this->map === null) {
$this->buildMap();
}
$keys = array_keys($this->map);
$values = array_values($this->map);
return str_replace($keys, $values, $value);
}
}