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<?php
namespace Guzzle\Http;
use Guzzle\Common\Collection;
use Guzzle\Http\QueryAggregator\DuplicateAggregator;
use Guzzle\Http\QueryAggregator\QueryAggregatorInterface;
use Guzzle\Http\QueryAggregator\PhpAggregator;
/**
* Query string object to handle managing query string parameters and aggregating those parameters together as a string.
*/
class QueryString extends Collection
{
/** @var string Used to URL encode with rawurlencode */
const RFC_3986 = 'RFC 3986';
/** @var string Used to encode with urlencode */
const FORM_URLENCODED = 'application/x-www-form-urlencoded';
/** @var string Constant used to create blank query string values (e.g. ?foo) */
const BLANK = "_guzzle_blank_";
/** @var string The query string field separator (e.g. '&') */
protected $fieldSeparator = '&';
/** @var string The query string value separator (e.g. '=') */
protected $valueSeparator = '=';
/** @var bool URL encode fields and values */
protected $urlEncode = 'RFC 3986';
/** @var QueryAggregatorInterface */
protected $aggregator;
/** @var array Cached PHP aggregator */
private static $defaultAggregator = null;
/**
* Parse a query string into a QueryString object
*
* @param string $query Query string to parse
*
* @return self
*/
public static function fromString($query)
{
$q = new static();
if ($query === '') {
return $q;
}
$foundDuplicates = $foundPhpStyle = false;
foreach (explode('&', $query) as $kvp) {
$parts = explode('=', $kvp, 2);
$key = rawurldecode($parts[0]);
if ($paramIsPhpStyleArray = substr($key, -2) == '[]') {
$foundPhpStyle = true;
$key = substr($key, 0, -2);
}
if (isset($parts[1])) {
$value = rawurldecode(str_replace('+', '%20', $parts[1]));
if (isset($q[$key])) {
$q->add($key, $value);
$foundDuplicates = true;
} elseif ($paramIsPhpStyleArray) {
$q[$key] = array($value);
} else {
$q[$key] = $value;
}
} else {
$q->add($key, self::BLANK);
}
}
// Use the duplicate aggregator if duplicates were found and not using PHP style arrays
if ($foundDuplicates && !$foundPhpStyle) {
$q->setAggregator(new DuplicateAggregator());
}
return $q;
}
/**
* Convert the query string parameters to a query string string
*
* @return string
*/
public function __toString()
{
if (!$this->data) {
return '';
}
$queryString = '';
foreach ($this->prepareData($this->data) as $name => $value) {
foreach ((array) $value as $v) {
if ($queryString) {
$queryString .= $this->fieldSeparator;
}
$queryString .= $name;
if ($v !== self::BLANK) {
$queryString .= $this->valueSeparator . $v;
}
}
}
return $queryString;
}
/**
* Get the query string field separator
*
* @return string
*/
public function getFieldSeparator()
{
return $this->fieldSeparator;
}
/**
* Get the query string value separator
*
* @return string
*/
public function getValueSeparator()
{
return $this->valueSeparator;
}
/**
* Returns the type of URL encoding used by the query string
*
* One of: false, "RFC 3986", or "application/x-www-form-urlencoded"
*
* @return bool|string
*/
public function getUrlEncoding()
{
return $this->urlEncode;
}
/**
* Returns true or false if using URL encoding
*
* @return bool
*/
public function isUrlEncoding()
{
return $this->urlEncode !== false;
}
/**
* Provide a function for combining multi-valued query string parameters into a single or multiple fields
*
* @param null|QueryAggregatorInterface $aggregator Pass in a QueryAggregatorInterface object to handle converting
* deeply nested query string variables into a flattened array.
* Pass null to use the default PHP style aggregator. For legacy
* reasons, this function accepts a callable that must accepts a
* $key, $value, and query object.
* @return self
* @see \Guzzle\Http\QueryString::aggregateUsingComma()
*/
public function setAggregator(QueryAggregatorInterface $aggregator = null)
{
// Use the default aggregator if none was set
if (!$aggregator) {
if (!self::$defaultAggregator) {
self::$defaultAggregator = new PhpAggregator();
}
$aggregator = self::$defaultAggregator;
}
$this->aggregator = $aggregator;
return $this;
}
/**
* Set whether or not field names and values should be rawurlencoded
*
* @param bool|string $encode Set to TRUE to use RFC 3986 encoding (rawurlencode), false to disable encoding, or
* form_urlencoding to use application/x-www-form-urlencoded encoding (urlencode)
* @return self
*/
public function useUrlEncoding($encode)
{
$this->urlEncode = ($encode === true) ? self::RFC_3986 : $encode;
return $this;
}
/**
* Set the query string separator
*
* @param string $separator The query string separator that will separate fields
*
* @return self
*/
public function setFieldSeparator($separator)
{
$this->fieldSeparator = $separator;
return $this;
}
/**
* Set the query string value separator
*
* @param string $separator The query string separator that will separate values from fields
*
* @return self
*/
public function setValueSeparator($separator)
{
$this->valueSeparator = $separator;
return $this;
}
/**
* Returns an array of url encoded field names and values
*
* @return array
*/
public function urlEncode()
{
return $this->prepareData($this->data);
}
/**
* URL encodes a value based on the url encoding type of the query string object
*
* @param string $value Value to encode
*
* @return string
*/
public function encodeValue($value)
{
if ($this->urlEncode == self::RFC_3986) {
return rawurlencode($value);
} elseif ($this->urlEncode == self::FORM_URLENCODED) {
return urlencode($value);
} else {
return (string) $value;
}
}
/**
* Url encode parameter data and convert nested query strings into a flattened hash.
*
* @param array $data The data to encode
*
* @return array Returns an array of encoded values and keys
*/
protected function prepareData(array $data)
{
// If no aggregator is present then set the default
if (!$this->aggregator) {
$this->setAggregator(null);
}
$temp = array();
foreach ($data as $key => $value) {
if (is_array($value)) {
$temp = array_merge($temp, $this->aggregator->aggregate($key, $value, $this));
} else {
$temp[$this->encodeValue($key)] = $this->encodeValue($value);
}
}
return $temp;
}
}