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Copy pathJSONPath.php
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307 lines (255 loc) · 6.07 KB
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<?php
/**
* JSONPath implementation for PHP.
*
* @copyright Copyright (c) 2018 Flow Communications
* @license MIT <https://github.com/SoftCreatR/JSONPath/blob/main/LICENSE>
*/
declare(strict_types=1);
namespace Flow\JSONPath;
use ArrayAccess;
use Countable;
use Exception;
use Iterator;
use JsonSerializable;
use function array_merge;
use function count;
use function current;
use function end;
use function key;
use function md5;
use function next;
use function reset;
class JSONPath implements ArrayAccess, Iterator, JsonSerializable, Countable
{
protected static $tokenCache = [];
protected $data;
protected $options;
const ALLOW_MAGIC = 1;
/**
* @param $data
* @param int $options
*/
public function __construct($data = null, $options = 0)
{
$this->data = $data;
$this->options = $options;
}
/**
* Evaluate an expression
*
* @param $expression
* @return JSONPath
* @throws Exception
*/
public function find($expression): self
{
$tokens = $this->parseTokens($expression);
$collectionData = [$this->data];
foreach ($tokens as $token) {
$filter = $token->buildFilter($this->options);
$filteredData = [];
foreach ($collectionData as $value) {
if (AccessHelper::isCollectionType($value)) {
$filteredValue = $filter->filter($value);
$filteredData = array_merge($filteredData, $filteredValue);
}
}
$collectionData = $filteredData;
}
return new static($collectionData, $this->options);
}
/**
* @return mixed
*/
public function first()
{
$keys = AccessHelper::collectionKeys($this->data);
if (empty($keys)) {
return null;
}
$value = $this->data[$keys[0]] ?? null;
return AccessHelper::isCollectionType($value) ? new static($value, $this->options) : $value;
}
/**
* Evaluate an expression and return the last result
* @return mixed
*/
public function last()
{
$keys = AccessHelper::collectionKeys($this->data);
if (empty($keys)) {
return null;
}
$value = $this->data[end($keys)] ?: null;
return AccessHelper::isCollectionType($value) ? new static($value, $this->options) : $value;
}
/**
* Evaluate an expression and return the first key
* @return mixed
*/
public function firstKey()
{
$keys = AccessHelper::collectionKeys($this->data);
if (empty($keys)) {
return null;
}
return $keys[0];
}
/**
* Evaluate an expression and return the last key
* @return mixed
*/
public function lastKey()
{
$keys = AccessHelper::collectionKeys($this->data);
if (empty($keys) || end($keys) === false) {
return null;
}
return end($keys);
}
/**
* @param $expression
* @return array
* @throws Exception
*/
public function parseTokens($expression): array
{
$cacheKey = md5($expression);
if (isset(static::$tokenCache[$cacheKey])) {
return static::$tokenCache[$cacheKey];
}
$lexer = new JSONPathLexer($expression);
$tokens = $lexer->parseExpression();
static::$tokenCache[$cacheKey] = $tokens;
return $tokens;
}
/**
* @return mixed
*/
public function getData()
{
return $this->data;
}
/**
* @deprecated Please use getData()
*/
public function data()
{
return $this->getData();
}
/**
* @param $data
* @return $this
*/
public function setData($data): self
{
$this->data = $data;
return $this;
}
/**
* @param mixed $offset
* @return bool
*/
public function offsetExists($offset): bool
{
return AccessHelper::keyExists($this->data, $offset);
}
/**
* @param mixed $offset
* @return $this|mixed
*/
public function offsetGet($offset)
{
$value = AccessHelper::getValue($this->data, $offset);
return AccessHelper::isCollectionType($value)
? new static($value, $this->options)
: $value;
}
/**
* @param mixed $offset
* @param mixed $value
*/
public function offsetSet($offset, $value)
{
if ($offset === null) {
$this->data[] = $value;
} else {
AccessHelper::setValue($this->data, $offset, $value);
}
}
/**
* @param mixed $offset
*/
public function offsetUnset($offset)
{
AccessHelper::unsetValue($this->data, $offset);
}
/**
* @return mixed
*/
public function jsonSerialize()
{
return $this->data;
}
/**
* Return the current element
*
* @return mixed
*/
public function current()
{
$value = current($this->data);
return AccessHelper::isCollectionType($value) ? new static($value, $this->options) : $value;
}
/**
* Move forward to next element
*/
public function next()
{
next($this->data);
}
/**
* Return the key of the current element
*
* @return mixed
*/
public function key()
{
return key($this->data);
}
/**
* Checks if current position is valid
*
* @return bool
*/
public function valid(): bool
{
return key($this->data) !== null;
}
/**
* Rewind the Iterator to the first element
*/
public function rewind()
{
reset($this->data);
}
/**
* @param $key
* @return mixed
* @noinspection MagicMethodsValidityInspection
*/
public function __get($key)
{
return $this->offsetExists($key) ? $this->offsetGet($key) : null;
}
/**
* Count elements of an object
*
* @return int
*/
public function count(): int
{
return count($this->data);
}
}