source: inc/admin/class.dc.form.php @ 1090:ed55b73cde39

<?php
# -- BEGIN LICENSE BLOCK ---------------------------------------
#
# This file is part of Dotclear 2.
#
# Copyright (c) 2003-2011 Olivier Meunier & Association Dotclear
# Licensed under the GPL version 2.0 license.
# See LICENSE file or
# http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
#
# -- END LICENSE BLOCK -----------------------------------------
if (!defined('DC_RC_PATH')) { return; }

/**
 * Template form node
 */
class dcFormNode extends Twig_Node
{
     public function __construct($name,Twig_NodeInterface $body,$lineno,$tag=null)
     {
          parent::__construct(array('body' => $body),array('name' => $name),$lineno,$tag);
     }
     
     /**
     * Compiles the node to PHP.
     *
     * @param Twig_Compiler A Twig_Compiler instance
     */
     public function compile(Twig_Compiler $compiler)
     {
          $compiler
               ->addDebugInfo($this)
               ->write("\$context['dc_form']->beginForm('".
                    $this->getAttribute('name')."');\n")
               ->subcompile($this->getNode('body'))
               ->write("\$context['dc_form']->renderHiddenWidgets();\n")
               ->write("\$context['dc_form']->endForm();\n")
          ;
     }
}

/**
 * Template form token parser
 */
class dcFormTokenParser extends Twig_TokenParser
{
     public function parse(Twig_Token $token)
     {
          $lineno = $token->getLine();
          $stream = $this->parser->getStream();
          $name = $stream->expect(Twig_Token::NAME_TYPE)->getValue();
          $stream->expect(Twig_Token::BLOCK_END_TYPE);
          $body = $this->parser->subparse(array($this,'decideBlockEnd'),true);
          $stream->expect(Twig_Token::BLOCK_END_TYPE);
          
          return new dcFormNode($name,$body,$token->getLine(),$this->getTag());
     }
     
     public function decideBlockEnd(Twig_Token $token)
     {
          return $token->test('endform');
     }
     
     public function getTag()
     {
          return 'form';
     }
}

/**
 * Template form extension
 */
class dcFormExtension extends Twig_Extension
{
     protected $template;
     protected $tpl;
     protected $core;
     protected $twig;
     protected $blocks;
     protected $forms;
     protected $currentForm;
     
     public function __construct($core)
     {
          $this->core = $core;
          $this->tpl = 'form_layout.html.twig';
          $this->forms = array();
          $this->currentForm = null;
     }
     
     public function initRuntime(Twig_Environment $environment)
     {
          $this->twig = $environment;
          $this->template = $this->twig->loadTemplate($this->tpl);
          $this->blocks = $this->template->getBlocks();
     }
     
     public function getGlobals()
     {
          return array('dc_form' => $this);
     }
     
     public function getFunctions()
     {
          return array(
               'form_field' => new Twig_Function_Method(
                    $this,
                    'renderWidget',
                    array('is_safe' => array('html'))
               ),
               '_form_is_choice_group' => new Twig_Function_Method(
                    $this,
                    'isChoiceGroup',
                    array('is_safe' => array('html'))
               ),
               '_form_is_choice_selected' => new Twig_Function_Method(
                    $this,
                    'isChoiceSelected',
                    array('is_safe' => array('html'))
               )
          );
     }
     
     public function isChoiceGroup($choice)
     {
          return is_array($choice);
     }
     
     public function isChoiceSelected($choice,$value)
     {
          return $choice == $value;
     }
     
     public function getTokenParsers()
     {
          return array(new dcFormTokenParser());
     }
     
     public function renderWidget($name,$attributes=array())
     {
          $field = $this->currentForm->$name;
          if ($field) {
               echo $this->template->renderBlock(
                    $field->getWidgetBlock(),
                    array_merge(
                         $field->getAttributes(),
                         array('attr' => $attributes)
                    ),
                    $this->blocks
               );
          }
     }

     public function renderHiddenWidgets()
     {
          foreach ($this->currentForm->getHiddenFields() as $h) {
               $this->renderWidget($h->getName());
          }
     }

     public function getName()
     {
          return 'dc_form';
     }

     public function addForm(dcForm $form)
     {
          $this->forms[$form->getName()] = $form;
     }

     public function beginForm($name)
     {
          if (isset($this->forms[$name])) {
               $this->currentForm = $this->forms[$name];
               $this->currentForm->begin();
          }
          else {
               throw new Twig_Error_Runtime(sprintf(
                    'Form "%s" does not exist',
                    $name
               ));
          }
     }
     
     public function endForm()
     {
          $this->currentForm->end();
          $this->currentForm = null;
     }
}

/**
 * Template form exception
 */
class InvalidFieldException extends Exception {
}

/**
 * Template form
 */
class dcForm
{
     protected $id;
     protected $name;
     protected $core;
     protected $action;
     protected $fields;
     protected $method;
     protected $submitfields;
     protected $hiddenfields;
     protected $errors;
     
     private function addNonce()
     {
          $this->addField(
               new dcFieldHidden(array('xd_check'),
               $this->core->getNonce())
          );
     }
     
     protected function getNID($nid)
     {
          if (is_array($nid)) {
               $this->name = $nid[0];
               $this->id = !empty($nid[1]) ? $nid[1] : null;
          }
          else {
               $this->id = null;
               $this->name = $nid;
          }
     }
     
     public function __construct($core,$name,$action,$method='POST')
     {
          $this->core = $core;
          $this->getNID($name);
          $this->method = $method;
          $this->action = $action;
          $this->fields = array();
          $this->core->tpl->getExtension('dc_form')->addForm($this);
          $this->submitfields = array();
          $this->hiddenfields = array();
          $this->errors = array();
          if ($method == 'POST') {
               $this->addNonce();
          }
     }
     
     public function getName()
     {
          return $this->name;
     }
     
     public function getErrors()
     {
          return $this->errors;
     }
     
     public function addField(dcField $f)
     {
          if ($f instanceof dcFieldAction) {
               $this->submitfields[$f->getName()] = $f;
          }
          if ($f instanceof dcFieldHidden) {
               $this->hiddenfields[$f->getName()] = $f;
          }
          $this->fields[$f->getName()] = $f;
          
          return $this;
     }
     
     public function begin()
     {
          echo sprintf(
               '<form%s method="%s" action="%s">',
               empty($this->id) ? '' : ' id="'.$this->id.'"',
               $this->method,
               $this->action
          );
     }
     
     public function end()
     {
          echo '</form>';
     }
     
     public function __isset($name)
     {
          return isset($this->fields[$name]);
     }
     
     public function __get($name)
     {
          return isset($this->fields[$name]) ? 
               $this->fields[$name] : null;
     }
     
     public function __set($name,$value)
     {
          if (isset($this->fields[$name])) {
               $this->fields[$name]->setAttribute('value',$value);
          }
     }
     
     public function isSubmitted()
     {
          $from = $this->method == 'POST' ? $_POST : $_GET;
          echo "form fields :\n";
     }
     
     public function setup()
     {
          $from = $this->method == 'POST' ? $_POST : $_GET;
          foreach ($this->fields as $f) {
               $f->setup($from);
          }
          foreach ($this->submitfields as $f) {
               if ($f->isDefined()) {
                    $ret = call_user_func($f->getAction(),$this);
                    return;
               }
          }
     }
     
     public function check()
     {
          foreach ($this->fields as $f) {
               try {
                    $f->check();
               }
               catch (InvalidFieldException $e) {
                    $this->errors[] = $e->getMessage();
               }
          }
     }
     
     public function getHiddenFields()
     {
          return $this->hiddenfields;
     }
}

/**
 * Template form field
 */
abstract class dcField
{
     protected $attributes;
     protected $name;
     protected $value;
     protected $id;
     protected $defined;
     
     protected function getNID($nid)
     {
          if (is_array($nid)) {
               $this->name = $nid[0];
               $this->id = !empty($nid[1]) ? $nid[1] : null;
          }
          else {
               $this->id = $this->name = $nid;
          }
     }
     
     public function __construct($name,$value,$attributes=array())
     {
          $this->getNID($name);
          $this->attributes = $attributes;
          $this->value = $value;
          $this->attributes['name'] = $this->name;
          $this->attributes['id'] = $this->id;
          $this->attributes['value'] = $this->value;
          $this->defined = false;
     }
     
     public function __toString()
     {
          return $this->value;
     }
     
     abstract public function getWidgetBlock();
     
     public function setAttribute($name,$value)
     {
          $this->attributes[$name] = $value;
     }
     
     public function getAttributes()
     {
          return $this->attributes;
     }
     
     public function getName()
     {
          return $this->name;
     }
     
     public function check()
     {
          if (!$this->defined && $this->attributes['defined']) {
               throw new InvalidFieldException(sprintf(
                    'Field "%s" is mandatory',
                    $this->attributes['label'])
               );
          }
     }
     
     public function setup($from)
     {
          if (isset($from[$this->id])) {
               $this->value = $from[$this->id];
               $this->defined = true;
          }
     }
     
     public function isDefined()
     {
          return $this->defined;
     }
}

/**
 * Template form field of type "password"
 */
class dcFieldPassword extends dcField
{
     public function getWidgetBlock()
     {
          return "field_password";
     }
}

/**
 * Template form field of type "text"
 */
class dcFieldText extends dcField
{
     public function getWidgetBlock()
     {
     return "field_text";
     }
}

/**
 * Template form field of type "textarea"
 */
class dcFieldTextArea extends dcField
{
     public function getWidgetBlock()
     {
          return "field_textarea";
     }
}

/**
 * Template form field of type "hidden"
 */
class dcFieldHidden extends dcField
{
     public function getWidgetBlock()
     {
          return "field_hidden";
     }
}

/**
 * Template form field of type "checkbox"
 */
class dcFieldCheckbox extends dcField
{
     public function getWidgetBlock()
     {
          return "field_checkbox";
     }
}

/**
 * Template form action
 */
abstract class dcFieldAction extends dcField
{
     protected $action;
     
     public function __construct($name,$value,$attributes=array())
     {
          parent::__construct($name,$value,$attributes);
          
          if (isset($attributes['action'])) {
               $this->action = $attributes['action'];
          }
     }
     
     public function getAction()
     {
          return $this->action;
     }
}

/**
 * Template form field of type "submit"
 */
class dcFieldSubmit extends dcFieldAction
{
     public function getWidgetBlock()
     {
          return "field_submit";
     }
}

/**
 * Template form field of type "combo"
 */
class dcFieldCombo extends dcField
{
     protected $options;
     
     public function __construct($name,$value,$options,$attributes=array())
     {
          $this->options = $options;
          parent::__construct($name,$value,$attributes);
          $this->attributes['options']=$options;
     }
     
     public function getWidgetBlock()
     {
          return "field_combo";
     }

}
?>