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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\HttpFoundation;
/**
* Represents an Accept-* header item.
*
* @author Jean-François Simon <contact@jfsimon.fr>
*/
class AcceptHeaderItem
{
/**
* @var string
*/
private $value;
/**
* @var float
*/
private $quality = 1.0;
/**
* @var int
*/
private $index = 0;
/**
* @var array
*/
private $attributes = array();
/**
* Constructor.
*
* @param string $value
* @param array $attributes
*/
public function __construct($value, array $attributes = array())
{
$this->value = $value;
foreach ($attributes as $name => $value) {
$this->setAttribute($name, $value);
}
}
/**
* Builds an AcceptHeaderInstance instance from a string.
*
* @param string $itemValue
*
* @return AcceptHeaderItem
*/
public static function fromString($itemValue)
{
$bits = preg_split('/\s*(?:;*("[^"]+");*|;*(\'[^\']+\');*|;+)\s*/', $itemValue, 0, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
$value = array_shift($bits);
$attributes = array();
$lastNullAttribute = null;
foreach ($bits as $bit) {
if (($start = substr($bit, 0, 1)) === ($end = substr($bit, -1)) && ($start === '"' || $start === '\'')) {
$attributes[$lastNullAttribute] = substr($bit, 1, -1);
} elseif ('=' === $end) {
$lastNullAttribute = $bit = substr($bit, 0, -1);
$attributes[$bit] = null;
} else {
$parts = explode('=', $bit);
$attributes[$parts[0]] = isset($parts[1]) && strlen($parts[1]) > 0 ? $parts[1] : '';
}
}
return new self(($start = substr($value, 0, 1)) === ($end = substr($value, -1)) && ($start === '"' || $start === '\'') ? substr($value, 1, -1) : $value, $attributes);
}
/**
* Returns header value's string representation.
*
* @return string
*/
public function __toString()
{
$string = $this->value.($this->quality < 1 ? ';q='.$this->quality : '');
if (count($this->attributes) > 0) {
$string .= ';'.implode(';', array_map(function ($name, $value) {
return sprintf(preg_match('/[,;=]/', $value) ? '%s="%s"' : '%s=%s', $name, $value);
}, array_keys($this->attributes), $this->attributes));
}
return $string;
}
/**
* Set the item value.
*
* @param string $value
*
* @return AcceptHeaderItem
*/
public function setValue($value)
{
$this->value = $value;
return $this;
}
/**
* Returns the item value.
*
* @return string
*/
public function getValue()
{
return $this->value;
}
/**
* Set the item quality.
*
* @param float $quality
*
* @return AcceptHeaderItem
*/
public function setQuality($quality)
{
$this->quality = $quality;
return $this;
}
/**
* Returns the item quality.
*
* @return float
*/
public function getQuality()
{
return $this->quality;
}
/**
* Set the item index.
*
* @param int $index
*
* @return AcceptHeaderItem
*/
public function setIndex($index)
{
$this->index = $index;
return $this;
}
/**
* Returns the item index.
*
* @return int
*/
public function getIndex()
{
return $this->index;
}
/**
* Tests if an attribute exists.
*
* @param string $name
*
* @return bool
*/
public function hasAttribute($name)
{
return isset($this->attributes[$name]);
}
/**
* Returns an attribute by its name.
*
* @param string $name
* @param mixed $default
*
* @return mixed
*/
public function getAttribute($name, $default = null)
{
return isset($this->attributes[$name]) ? $this->attributes[$name] : $default;
}
/**
* Returns all attributes.
*
* @return array
*/
public function getAttributes()
{
return $this->attributes;
}
/**
* Set an attribute.
*
* @param string $name
* @param string $value
*
* @return AcceptHeaderItem
*/
public function setAttribute($name, $value)
{
if ('q' === $name) {
$this->quality = (float) $value;
} else {
$this->attributes[$name] = (string) $value;
}
return $this;
}
}
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