class BotchaRecipeUsingJsAbstract in BOTCHA Spam Prevention 6.2

Hierarchy

• class \BotchaRecipe
  • class \BotchaRecipeUsingJsAbstract

File

controller/botcha_recipe.controller.inc, line 420

Controller layer of the BotchaRecipe objects.

class BotchaRecipeUsingJsAbstract extends BotchaRecipe {
  function getInfo() {
    parent::getInfo();
    $this->error_text .= '<br />' . t('Please enable Javascript to use this form.');
  }
  function getFieldCount() {
    return 1;
  }
  function generateFormElements() {
    $fields = $this
      ->getSetting('fields', $this
      ->getFields());
    $js = $this
      ->getSetting('js', $this
      ->getJs());
    $form_elements = array(
      $fields[0]['name'] => array(
        '#type' => 'textfield',
        '#title' => t('Enter your name'),
        // Leave the bot enough hints for it to guess it is a good name field
        '#default_value' => $fields[0]['default_value'],
        // Store part of secure_token
        '#description' => t('Your first name.'),
        // This is for human users without CSS.
        '#prefix' => '<div class="' . $fields[0]['class'] . '">' . '<span class="description"> (' . t('If you\'re a human, don\'t change the following field') . ')</span>',
        // @todo Move it to constant since it is also used in error_text.
        '#suffix' => '</div>' . '<noscript>' . t('Please enable Javascript to use this form.') . '</noscript>',
        // @todo Abstract it.

        //'#attributes' => array('class' => array($fields[0]['class']), 'autocomplete' => 'off'),
        '#attributes' => array(
          'class' => $fields[0]['class'],
          'autocomplete' => 'off',
        ),
        '#weight' => -20,
        '!valid_token' => $js['secure_token'],
      ),
    );
    $js_value = $this
      ->getProperty($this->settings['js']['value'], 'getJsValue');
    if (!empty($js_value)) {

      // @todo Abstract it.

      //drupal_add_js($js_value, array('type' => 'inline', 'preprocess' => FALSE));
      drupal_add_js($js_value, 'inline');
    }
    return array_merge(parent::generateFormElements(), $form_elements);
  }
  function getField($delta) {
    return array_merge(parent::getField($delta), array(
      'default_value' => $this
        ->getProperty($this->settings['fields'][$delta]['default_value'], 'getFieldDefault', $delta),
    ));
  }

  /**
   * What server sends to JS in the field.
   *
   * @return string
   */
  function getFieldDefault($delta) {
    $fields = $this
      ->getProperty($this->settings['fields'], 'getFields');
    $js = $this
      ->getProperty($this->settings['js'], 'getJs');
    $field_prefix = $fields[$delta]['prefix'];
    $chops_positions = array_keys($js['chops']);
    $secure_token = $js['secure_token'];
    return $field_prefix . substr($secure_token, $chops_positions[0], $chops_positions[1]);
  }
  public function getCss() {
    $fields = $this
      ->getProperty($this->settings['fields'], 'getFields');
    return 'div.' . $fields[0]['class'] . ' { display: none; visibility: hidden; }';
  }
  public function getJs() {

    // JS has to reconstruct the token from tok1, part of field_dflt, tok2.
    return array(
      'name' => $this
        ->getProperty($this->settings['js']['name'], 'getJsName'),
      'pos' => $this
        ->getProperty($this->settings['js']['pos'], 'getJsPos'),
      'match' => $this
        ->getProperty($this->settings['js']['match'], 'getJsMatch'),
      'secure_token' => $this
        ->getProperty($this->settings['js']['secure_token'], 'getJsSecureToken'),
      'chops' => $this
        ->getProperty($this->settings['js']['chops'], 'getJsChops'),
    );
  }

  /**
   * Get name of JS-script, attached to field.
   */
  function getJsName() {

    // Must start with a literal.
    return 'a' . substr($this->secret, 0, 10) . substr($this
      ->getProperty($this->seed, 'getSeed'), 6, 8);
  }

  /**
   * What position is the part of the token.
   */
  function getJsPos() {
    return strlen($this
      ->getProperty($this->settings['fields'][0]['prefix'], 'getFieldPrefix'));
  }

  /**
   *  What JS matches in the field.
   */
  function getJsMatch() {
    $chop_positions = array_keys($this
      ->getProperty($this->settings['js']['chops'], 'getJsChops'));
    return substr($this
      ->getFieldDefault(0), 0, $this
      ->getJsPos() + mt_rand(2, $chop_positions[1]));
  }
  function getJsChops() {
    $secure_token = $this
      ->getProperty($this->settings['js']['secure_token'], 'getJsSecureToken');

    // Chop the token in 3 parts.
    $js_chops = array();
    $chop1 = 2;
    $js_chops[$chop1] = substr($secure_token, 0, $chop1);
    $chop2 = mt_rand(5, 8);
    $js_chops[$chop2] = substr($secure_token, $chop1 + $chop2);
    return $js_chops;
  }
  function getJsSecureToken() {
    return substr($this
      ->getProperty($this->seed, 'getSeed'), 4, -2) . '_form';
  }
  function getJsValue() {
  }

}

Members

Name	Modifiers	Type	Description	Overrides
BotchaRecipe::$css	protected	property	CSS to add to the page.
BotchaRecipe::$description	protected	property	Brief description of the recipe. It should contain explanation of how bots would fail with it and what the recipe exactly does.
BotchaRecipe::$error_field	public	property	@todo Do we really need it? Probably the best way is to provide mail field always - it hides our fields. Name of the field in the form to use in error messages (to mask botcha fields).
BotchaRecipe::$error_text	public	property	Text to give users if botcha recipe blocks submission. It should give some help to real human users in cases of disabled Javascript or CSS.
BotchaRecipe::$id	public	property	Identifier of recipe.
BotchaRecipe::$js	protected	property	Javascript to add to the page.
BotchaRecipe::$method	protected	property	Method of recipe genration.
BotchaRecipe::$recipebooks	protected	property
BotchaRecipe::$secret	protected	property	Secret.
BotchaRecipe::$settings	protected	property	Options that received as parameters turned into settings by merging with default values.
BotchaRecipe::$status	public	property	Status of the spam check.
BotchaRecipe::applyRecipe	public	function		2
BotchaRecipe::getDefaultSettings		function	Used to get default recipe data structure.
BotchaRecipe::getDescription		function
BotchaRecipe::getFieldClass		function
BotchaRecipe::getFieldName		function		3
BotchaRecipe::getFieldPrefix		function
BotchaRecipe::getFields		function
BotchaRecipe::getMethod		function
BotchaRecipe::getProperty		function	Universal getter. Wrapper getProperty is used to let class methods be used not only in getting default settings. It gives flexibility to make calls to the class methods in any order: the first of them will always calculate the property value and set…
BotchaRecipe::getRecipe	public static	function
BotchaRecipe::getSecret		function
BotchaRecipe::getSeed		function
BotchaRecipe::getSetting		function
BotchaRecipe::getStatus		function
BotchaRecipe::getTitle		function
BotchaRecipe::handle		function	Handle form depending on the result of spam check.	1
BotchaRecipe::isSpam		function	Spam check.	4
BotchaRecipe::save	public	function
BotchaRecipe::setDescription		function
BotchaRecipe::setMethod		function
BotchaRecipe::setRecipebook	public	function
BotchaRecipe::setSecret		function
BotchaRecipe::setSetting		function
BotchaRecipe::setStatus		function
BotchaRecipe::setTitle		function
BotchaRecipe::__construct		function	Magic method __construct.
BotchaRecipeUsingJsAbstract::generateFormElements		function	Used to get information about the recipe. Must be overridden with calling to parent::generateFormElements. @todo Switch from indexed array to associative. Overrides BotchaRecipe::generateFormElements	1
BotchaRecipeUsingJsAbstract::getCss	public	function	Should be overridden. Overrides BotchaRecipe::getCss	1
BotchaRecipeUsingJsAbstract::getField		function	Overrides BotchaRecipe::getField
BotchaRecipeUsingJsAbstract::getFieldCount		function		1
BotchaRecipeUsingJsAbstract::getFieldDefault		function	What server sends to JS in the field.
BotchaRecipeUsingJsAbstract::getInfo		function	Used to get information about the recipe. Must be overridden. Overrides BotchaRecipe::getInfo	2
BotchaRecipeUsingJsAbstract::getJs	public	function	Should be overridden. Overrides BotchaRecipe::getJs
BotchaRecipeUsingJsAbstract::getJsChops		function
BotchaRecipeUsingJsAbstract::getJsMatch		function	What JS matches in the field.
BotchaRecipeUsingJsAbstract::getJsName		function	Get name of JS-script, attached to field.
BotchaRecipeUsingJsAbstract::getJsPos		function	What position is the part of the token.
BotchaRecipeUsingJsAbstract::getJsSecureToken		function
BotchaRecipeUsingJsAbstract::getJsValue		function		2