<?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;
/**
* Form represents an HTML form.
*
* @author Fabien Potencier <fabien@symfony.com>
*
* @api
*/
class Form extends Link implements \ArrayAccess
{
private $button;
private $fields;
/**
* Constructor.
*
* @param \DOMNode $node A \DOMNode instance
* @param string $currentUri The URI of the page where the form is embedded
* @param string $method The method to use for the link (if null, it defaults to the method defined by the form)
*
* @throws \LogicException if the node is not a button inside a form tag
*
* @api
*/
public function __construct(\DOMNode $node, $currentUri, $method = null)
{
parent::__construct($node, $currentUri, $method);
$this->initialize();
}
/**
* Gets the form node associated with this form.
*
* @return \DOMNode A \DOMNode instance
*/
public function getFormNode()
{
return $this->node;
}
/**
* Sets the value of the fields.
*
* @param array $values An array of field values
*
* @api
*/
public function setValues(array $values)
{
foreach ($values as $name => $value) {
$this[$name] = $value;
}
return $this;
}
/**
* Gets the field values.
*
* The returned array does not include file fields (@see getFiles).
*
* @return array An array of field values.
*
* @api
*/
public function getValues()
{
$values = array();
foreach ($this->fields as $name => $field) {
if ($field->isDisabled()) {
continue;
}
if (!$field instanceof Field\FileFormField && $field->hasValue()) {
$values[$name] = $field->getValue();
}
}
return $values;
}
/**
* Gets the file field values.
*
* @return array An array of file field values.
*
* @api
*/
public function getFiles()
{
if (!in_array($this->getMethod(), array('POST', 'PUT', 'DELETE'))) {
return array();
}
$files = array();
foreach ($this->fields as $name => $field) {
if ($field->isDisabled()) {
continue;
}
if ($field instanceof Field\FileFormField) {
$files[$name] = $field->getValue();
}
}
return $files;
}
/**
* Gets the field values as PHP.
*
* This method converts fields with th array notation
* (like foo[bar] to arrays) like PHP does.
*
* @return array An array of field values.
*
* @api
*/
public function getPhpValues()
{
$qs = http_build_query($this->getValues());
parse_str($qs, $values);
return $values;
}
/**
* Gets the file field values as PHP.
*
* This method converts fields with th array notation
* (like foo[bar] to arrays) like PHP does.
*
* @return array An array of field values.
*
* @api
*/
public function getPhpFiles()
{
$qs = http_build_query($this->getFiles());
parse_str($qs, $values);
return $values;
}
/**
* Gets the URI of the form.
*
* The returned URI is not the same as the form "action" attribute.
* This method merges the value if the method is GET to mimics
* browser behavior.
*
* @return string The URI
*
* @api
*/
public function getUri()
{
$uri = parent::getUri();
if (!in_array($this->getMethod(), array('POST', 'PUT', 'DELETE')) && $queryString = http_build_query($this->getValues(), null, '&')) {
$sep = false === strpos($uri, '?') ? '?' : '&';
$uri .= $sep.$queryString;
}
return $uri;
}
protected function getRawUri()
{
return $this->node->getAttribute('action');
}
/**
* Gets the form method.
*
* If no method is defined in the form, GET is returned.
*
* @return string The method
*
* @api
*/
public function getMethod()
{
if (null !== $this->method) {
return $this->method;
}
return $this->node->getAttribute('method') ? strtoupper($this->node->getAttribute('method')) : 'GET';
}
/**
* Returns true if the named field exists.
*
* @param string $name The field name
*
* @return Boolean true if the field exists, false otherwise
*
* @api
*/
public function has($name)
{
return isset($this->fields[$name]);
}
/**
* Removes a field from the form.
*
* @param string $name The field name
*
* @api
*/
public function remove($name)
{
unset($this->fields[$name]);
}
/**
* Gets a named field.
*
* @param string $name The field name
*
* @return FormField The field instance
*
* @throws \InvalidArgumentException When field is not present in this form
*
* @api
*/
public function get($name)
{
if (!$this->has($name)) {
throw new \InvalidArgumentException(sprintf('The form has no "%s" field', $name));
}
return $this->fields[$name];
}
/**
* Sets a named field.
*
* @param Field\FormField $field The field
*
* @return FormField The field instance
*
* @api
*/
public function set(Field\FormField $field)
{
$this->fields[$field->getName()] = $field;
}
/**
* Gets all fields.
*
* @return array An array of fields
*
* @api
*/
public function all()
{
return $this->fields;
}
private function initialize()
{
$this->fields = array();
$document = new \DOMDocument('1.0', 'UTF-8');
$node = $document->importNode($this->node, true);
$button = $document->importNode($this->button, true);
$root = $document->appendChild($document->createElement('_root'));
$root->appendChild($node);
$root->appendChild($button);
$xpath = new \DOMXPath($document);
foreach ($xpath->query('descendant::input | descendant::textarea | descendant::select', $root) as $node) {
if (!$node->hasAttribute('name')) {
continue;
}
$nodeName = $node->nodeName;
if ($node === $button) {
$this->set(new Field\InputFormField($node));
} elseif ('select' == $nodeName || 'input' == $nodeName && 'checkbox' == $node->getAttribute('type')) {
$this->set(new Field\ChoiceFormField($node));
} elseif ('input' == $nodeName && 'radio' == $node->getAttribute('type')) {
if ($this->has($node->getAttribute('name'))) {
$this->get($node->getAttribute('name'))->addChoice($node);
} else {
$this->set(new Field\ChoiceFormField($node));
}
} elseif ('input' == $nodeName && 'file' == $node->getAttribute('type')) {
$this->set(new Field\FileFormField($node));
} elseif ('input' == $nodeName && !in_array($node->getAttribute('type'), array('submit', 'button', 'image'))) {
$this->set(new Field\InputFormField($node));
} elseif ('textarea' == $nodeName) {
$this->set(new Field\TextareaFormField($node));
}
}
}
/**
* Returns true if the named field exists.
*
* @param string $name The field name
*
* @return Boolean true if the field exists, false otherwise
*/
public function offsetExists($name)
{
return $this->has($name);
}
/**
* Gets the value of a field.
*
* @param string $name The field name
*
* @return FormField The associated Field instance
*
* @throws \InvalidArgumentException if the field does not exist
*/
public function offsetGet($name)
{
if (!$this->has($name)) {
throw new \InvalidArgumentException(sprintf('The form field "%s" does not exist', $name));
}
return $this->fields[$name];
}
/**
* Sets the value of a field.
*
* @param string $name The field name
* @param string|array $value The value of the field
*
* @throws \InvalidArgumentException if the field does not exist
*/
public function offsetSet($name, $value)
{
if (!$this->has($name)) {
throw new \InvalidArgumentException(sprintf('The form field "%s" does not exist', $name));
}
$this->fields[$name]->setValue($value);
}
/**
* Removes a field from the form.
*
* @param string $name The field name
*/
public function offsetUnset($name)
{
$this->remove($name);
}
protected function setNode(\DOMNode $node)
{
$this->button = $node;
if ('button' == $node->nodeName || ('input' == $node->nodeName && in_array($node->getAttribute('type'), array('submit', 'button', 'image')))) {
do {
// use the ancestor form element
if (null === $node = $node->parentNode) {
throw new \LogicException('The selected node does not have a form ancestor.');
}
} while ('form' != $node->nodeName);
} else {
throw new \LogicException(sprintf('Unable to submit on a "%s" tag.', $node->nodeName));
}
$this->node = $node;
}
}