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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\DomCrawler;
use Symfony\Component\DomCrawler\Field\FormField;
/**
* This is an internal class that must not be used directly.
*
* @internal
*/
class FormFieldRegistry
{
private $fields = [];
private $base = '';
/**
* Adds a field to the registry.
*/
public function add(FormField $field)
{
$segments = $this->getSegments($field->getName());
$target = &$this->fields;
while ($segments) {
if (!\is_array($target)) {
$target = [];
}
$path = array_shift($segments);
if ('' === $path) {
$target = &$target[];
} else {
$target = &$target[$path];
}
}
$target = $field;
}
/**
* Removes a field based on the fully qualifed name and its children from the registry.
*/
public function remove(string $name)
{
$segments = $this->getSegments($name);
$target = &$this->fields;
while (\count($segments) > 1) {
$path = array_shift($segments);
if (!\is_array($target) || !\array_key_exists($path, $target)) {
return;
}
$target = &$target[$path];
}
unset($target[array_shift($segments)]);
}
/**
* Returns the value of the field based on the fully qualifed name and its children.
*
* @return FormField|FormField[]|FormField[][] The value of the field
*
* @throws \InvalidArgumentException if the field does not exist
*/
public function &get(string $name)
{
$segments = $this->getSegments($name);
$target = &$this->fields;
while ($segments) {
$path = array_shift($segments);
if (!\is_array($target) || !\array_key_exists($path, $target)) {
throw new \InvalidArgumentException(sprintf('Unreachable field "%s".', $path));
}
$target = &$target[$path];
}
return $target;
}
/**
* Tests whether the form has the given field based on the fully qualified name.
*
* @return bool Whether the form has the given field
*/
public function has(string $name): bool
{
try {
$this->get($name);
return true;
} catch (\InvalidArgumentException $e) {
return false;
}
}
/**
* Set the value of a field based on the fully qualified name and its children.
*
* @param mixed $value The value
*
* @throws \InvalidArgumentException if the field does not exist
*/
public function set(string $name, $value)
{
$target = &$this->get($name);
if ((!\is_array($value) && $target instanceof Field\FormField) || $target instanceof Field\ChoiceFormField) {
$target->setValue($value);
} elseif (\is_array($value)) {
$registry = new static();
$registry->base = $name;
$registry->fields = $value;
foreach ($registry->all() as $k => $v) {
$this->set($k, $v);
}
} else {
throw new \InvalidArgumentException(sprintf('Cannot set value on a compound field "%s".', $name));
}
}
/**
* Returns the list of field with their value.
*
* @return FormField[] The list of fields as [string] Fully qualified name => (mixed) value)
*/
public function all(): array
{
return $this->walk($this->fields, $this->base);
}
/**
* Transforms a PHP array in a list of fully qualified name / value.
*/
private function walk(array $array, ?string $base = '', array &$output = []): array
{
foreach ($array as $k => $v) {
$path = empty($base) ? $k : sprintf('%s[%s]', $base, $k);
if (\is_array($v)) {
$this->walk($v, $path, $output);
} else {
$output[$path] = $v;
}
}
return $output;
}
/**
* Splits a field name into segments as a web browser would do.
*
* getSegments('base[foo][3][]') = ['base', 'foo, '3', ''];
*
* @return string[] The list of segments
*/
private function getSegments(string $name): array
{
if (preg_match('/^(?P<base>[^[]+)(?P<extra>(\[.*)|$)/', $name, $m)) {
$segments = [$m['base']];
while (!empty($m['extra'])) {
$extra = $m['extra'];
if (preg_match('/^\[(?P<segment>.*?)\](?P<extra>.*)$/', $extra, $m)) {
$segments[] = $m['segment'];
} else {
$segments[] = $extra;
}
}
return $segments;
}
return [$name];
}
}