<?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.
*/
class FormFieldRegistry
{
private $fields = array();
private $base;
/**
* Adds a field to the registry.
*
* @param FormField $field The field
*
* @throws \InvalidArgumentException when the name is malformed
*/
public function add(FormField $field)
{
$segments = $this->getSegments($field->getName());
$target =& $this->fields;
while ($segments) {
if (!is_array($target)) {
$target = array();
}
$path = array_shift($segments);
if ('' === $path) {
$target =& $target[];
} else {
$target =& $target[$path];
}
}
$target = $field;
}
/**
* Removes a field and its children from the registry.
*
* @param string $name The fully qualified name of the base field
*
* @throws \InvalidArgumentException when the name is malformed
*/
public function remove($name)
{
$segments = $this->getSegments($name);
$target =& $this->fields;
while (count($segments) > 1) {
$path = array_shift($segments);
if (!array_key_exists($path, $target)) {
return;
}
$target =& $target[$path];
}
unset($target[array_shift($segments)]);
}
/**
* Returns the value of the field and its children.
*
* @param string $name The fully qualified name of the field
*
* @return mixed The value of the field
*
* @throws \InvalidArgumentException when the name is malformed
* @throws \InvalidArgumentException if the field does not exist
*/
public function &get($name)
{
$segments = $this->getSegments($name);
$target =& $this->fields;
while ($segments) {
$path = array_shift($segments);
if (!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.
*
* @param string $name The fully qualified name of the field
*
* @return Boolean Whether the form has the given field
*/
public function has($name)
{
try {
$this->get($name);
return true;
} catch (\InvalidArgumentException $e) {
return false;
}
}
/**
* Set the value of a field and its children.
*
* @param string $name The fully qualified name of the field
* @param mixed $value The value
*
* @throws \InvalidArgumentException when the name is malformed
* @throws \InvalidArgumentException if the field does not exist
*/
public function set($name, $value)
{
$target =& $this->get($name);
if (!is_array($value) || $target instanceof Field\ChoiceFormField) {
$target->setValue($value);
} else {
$fields = self::create($name, $value);
foreach ($fields->all() as $k => $v) {
$this->set($k, $v);
}
}
}
/**
* Returns the list of field with their value.
*
* @return array The list of fields as array((string) Fully qualified name => (mixed) value)
*/
public function all()
{
return $this->walk($this->fields, $this->base);
}
/**
* Creates an instance of the class.
*
* This function is made private because it allows overriding the $base and
* the $values properties without any type checking.
*
* @param string $base The fully qualified name of the base field
* @param array $values The values of the fields
*
* @return FormFieldRegistry
*/
private static function create($base, array $values)
{
$registry = new static();
$registry->base = $base;
$registry->fields = $values;
return $registry;
}
/**
* Transforms a PHP array in a list of fully qualified name / value.
*
* @param array $array The PHP array
* @param string $base The name of the base field
* @param array $output The initial values
*
* @return array The list of fields as array((string) Fully qualified name => (mixed) value)
*/
private function walk(array $array, $base = '', array &$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.
*
* <code>
* getSegments('base[foo][3][]') = array('base', 'foo, '3', '');
* </code>
*
* @param string $name The name of the field
*
* @return array The list of segments
*
* @throws \InvalidArgumentException when the name is malformed
*/
private function getSegments($name)
{
if (preg_match('/^(?P<base>[^[]+)(?P<extra>(\[.*)|$)/', $name, $m)) {
$segments = array($m['base']);
while (!empty($m['extra'])) {
if (preg_match('/^\[(?P<segment>.*?)\](?P<extra>.*)$/', $m['extra'], $m)) {
$segments[] = $m['segment'];
} else {
throw new \InvalidArgumentException(sprintf('Malformed field path "%s"', $name));
}
}
return $segments;
}
throw new \InvalidArgumentException(sprintf('Malformed field path "%s"', $name));
}
}
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