<?php
/**
* Case-insensitive dictionary, suitable for HTTP headers
*
* @package Requests\Utilities
*/
namespace WpOrg\Requests\Utility;
use ArrayAccess;
use ArrayIterator;
use IteratorAggregate;
use ReturnTypeWillChange;
use WpOrg\Requests\Exception;
/**
* Case-insensitive dictionary, suitable for HTTP headers
*
* @package Requests\Utilities
*/
class CaseInsensitiveDictionary implements ArrayAccess, IteratorAggregate {
/**
* Actual item data
*
* @var array
*/
protected $data = [];
/**
* Creates a case insensitive dictionary.
*
* @param array $data Dictionary/map to convert to case-insensitive
*/
public function __construct(array $data = []) {
foreach ($data as $offset => $value) {
$this->offsetSet($offset, $value);
}
}
/**
* Check if the given item exists
*
* @param string $offset Item key
* @return boolean Does the item exist?
*/
#[ReturnTypeWillChange]
public function offsetExists($offset) {
if (is_string($offset)) {
$offset = strtolower($offset);
}
return isset($this->data[$offset]);
}
/**
* Get the value for the item
*
* @param string $offset Item key
* @return string|null Item value (null if the item key doesn't exist)
*/
#[ReturnTypeWillChange]
public function offsetGet($offset) {
if (is_string($offset)) {
$offset = strtolower($offset);
}
if (!isset($this->data[$offset])) {
return null;
}
return $this->data[$offset];
}
/**
* Set the given item
*
* @param string $offset Item name
* @param string $value Item value
*
* @throws \WpOrg\Requests\Exception On attempting to use dictionary as list (`invalidset`)
*/
#[ReturnTypeWillChange]
public function offsetSet($offset, $value) {
if ($offset === null) {
throw new Exception('Object is a dictionary, not a list', 'invalidset');
}
if (is_string($offset)) {
$offset = strtolower($offset);
}
$this->data[$offset] = $value;
}
/**
* Unset the given header
*
* @param string $offset The key for the item to unset.
*/
#[ReturnTypeWillChange]
public function offsetUnset($offset) {
if (is_string($offset)) {
$offset = strtolower($offset);
}
unset($this->data[$offset]);
}
/**
* Get an iterator for the data
*
* @return \ArrayIterator
*/
#[ReturnTypeWillChange]
public function getIterator() {
return new ArrayIterator($this->data);
}
/**
* Get the headers as an array
*
* @return array Header data
*/
public function getAll() {
return $this->data;
}
}