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helper.php

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<?php
/* SVN FILE: $Id: helper_8php-source.html 580 2008-07-01 14:45:49Z gwoo $ */

/**
 * Backend for helpers.
 *
 * Internal methods for the Helpers.
 *
 * PHP versions 4 and 5
 *
 * CakePHP(tm) :  Rapid Development Framework <http://www.cakephp.org/>
 * Copyright 2005-2008, Cake Software Foundation, Inc.
 *                              1785 E. Sahara Avenue, Suite 490-204
 *                              Las Vegas, Nevada 89104
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @filesource
 * @copyright       Copyright 2005-2008, Cake Software Foundation, Inc.
 * @link                http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
 * @package         cake
 * @subpackage      cake.cake.libs.view
 * @since           CakePHP(tm) v 0.2.9
 * @version         $Revision: 580 $
 * @modifiedby      $LastChangedBy: gwoo $
 * @lastmodified    $Date: 2008-07-01 09:45:49 -0500 (Tue, 01 Jul 2008) $
 * @license         http://www.opensource.org/licenses/mit-license.php The MIT License
 */

/**
 * Included libs
 */
App::import('Core', 'Overloadable');

/**
 * Backend for helpers.
 *
 * Long description for class
 *
 * @package     cake
 * @subpackage  cake.cake.libs.view
 */
class Helper extends Overloadable {

/**
 * List of helpers used by this helper
 *
 * @var array
 */
    var $helpers = null;
/**
 * Base URL
 *
 * @var string
 */
    var $base = null;
/**
 * Webroot path
 *
 * @var string
 */
    var $webroot = null;
/**
 * Theme name
 *
 * @var string
 */
    var $themeWeb = null;
/**
 * URL to current action.
 *
 * @var string
 */
    var $here = null;
/**
 * Parameter array.
 *
 * @var array
 */
    var $params = array();
/**
 * Current action.
 *
 * @var string
 */
    var $action = null;
/**
 * Plugin path
 *
 * @var string
 */
    var $plugin = null;
/**
 * POST data for models
 *
 * @var array
 */
    var $data = null;
/**
 * List of named arguments
 *
 * @var array
 */
    var $namedArgs = null;
/**
 * URL argument separator character
 *
 * @var string
 */
    var $argSeparator = null;
/**
 * Contains model validation errors of form post-backs
 *
 * @access public
 * @var array
 */
    var $validationErrors = null;
/**
 * Holds tag templates.
 *
 * @access public
 * @var array
 */
    var $tags = array();
/**
 * Holds the content to be cleaned.
 *
 * @access private
 * @var mixed
 */
    var $__tainted = null;
/**
 * Holds the cleaned content.
 *
 * @access private
 * @var mixed
 */
    var $__cleaned = null;
/**
 * Default overload methods
 *
 * @access protected
 */
    function get__($name) {}
    function set__($name, $value) {}
    function call__($method, $params) {
        trigger_error(sprintf(__('Method %1$s::%2$s does not exist', true), get_class($this), $method), E_USER_WARNING);
    }

/**
 * Parses tag templates into $this->tags.
 *
 * @param $name file name
 * @return array merged tags from config/$name.php
 */
    function loadConfig($name = 'tags') {
        if (file_exists(CONFIGS . $name .'.php')) {
            require(CONFIGS . $name .'.php');
            if (isset($tags)) {
                $this->tags = array_merge($this->tags, $tags);
            }
        }
        return $this->tags;
    }
/**
 * Finds URL for specified action.
 *
 * Returns an URL pointing to a combination of controller and action. Param
 * $url can be:
 *  + Empty - the method will find adress to actuall controller/action.
 *  + '/' - the method will find base URL of application.
 *  + A combination of controller/action - the method will find url for it.
 *
 * @param  mixed  $url    Cake-relative URL, like "/products/edit/92" or "/presidents/elect/4"
 *                        or an array specifying any of the following: 'controller', 'action',
 *                        and/or 'plugin', in addition to named arguments (keyed array elements),
 *                        and standard URL arguments (indexed array elements)
 * @param boolean $full   If true, the full base URL will be prepended to the result
 * @return string  Full translated URL with base path.
 */
    function url($url = null, $full = false) {
        return Router::url($url, $full);
    }
/**
 * Checks if a file exists when theme is used, if no file is found default location is returned
 *
 * @param  string  $file
 * @return string  $webPath web path to file.
 */
    function webroot($file) {
        $webPath = "{$this->webroot}" . $file;
        if (!empty($this->themeWeb)) {
            $os = env('OS');
            if (!empty($os) && strpos($os, 'Windows') !== false) {
                $path = str_replace('/', '\\', WWW_ROOT . $this->themeWeb  . $file);
            } else {
                $path = WWW_ROOT . $this->themeWeb  . $file;
            }
            if (file_exists($path)) {
                $webPath = "{$this->webroot}" . $this->themeWeb . $file;
            }
        }
        return str_replace('//', '/', $webPath);
    }

/**
 * Used to remove harmful tags from content
 *
 * @param mixed $output
 * @return cleaned content for output
 * @access public
 */
    function clean($output) {
        $this->__reset();
        if (empty($output)) {
            return null;
        }
        if (is_array($output)) {
            foreach ($output as $key => $value) {
                $return[$key] = $this->clean($value);
            }
            return $return;
        }
        $this->__tainted = $output;
        $this->__clean();
        return $this->__cleaned;
    }
/**
 * Returns a space-delimited string with items of the $options array. If a
 * key of $options array happens to be one of:
 *  + 'compact'
 *  + 'checked'
 *  + 'declare'
 *  + 'readonly'
 *  + 'disabled'
 *  + 'selected'
 *  + 'defer'
 *  + 'ismap'
 *  + 'nohref'
 *  + 'noshade'
 *  + 'nowrap'
 *  + 'multiple'
 *  + 'noresize'
 *
 * And its value is one of:
 *  + 1
 *  + true
 *  + 'true'
 *
 * Then the value will be reset to be identical with key's name.
 * If the value is not one of these 3, the parameter is not output.
 *
 * @param  array  $options Array of options.
 * @param  array  $exclude Array of options to be excluded.
 * @param  string $insertBefore String to be inserted before options.
 * @param  string $insertAfter  String to be inserted ater options.
 * @return string
 */
    function _parseAttributes($options, $exclude = null, $insertBefore = ' ', $insertAfter = null) {
        if (is_array($options)) {
            $options = array_merge(array('escape' => true), $options);

            if (!is_array($exclude)) {
                $exclude = array();
            }
            $keys = array_diff(array_keys($options), array_merge((array)$exclude, array('escape')));
            $values = array_intersect_key(array_values($options), $keys);
            $escape = $options['escape'];
            $attributes = array();

            foreach ($keys as $index => $key) {
                $attributes[] = $this->__formatAttribute($key, $values[$index], $escape);
            }
            $out = implode(' ', $attributes);
        } else {
            $out = $options;
        }
        return $out ? $insertBefore . $out . $insertAfter : '';
    }
/**
 * @param  string $key
 * @param  string $value
 * @return string
 * @access private
 */
    function __formatAttribute($key, $value, $escape = true) {
        $attribute = '';
        $attributeFormat = '%s="%s"';
        $minimizedAttributes = array('compact', 'checked', 'declare', 'readonly', 'disabled', 'selected', 'defer', 'ismap', 'nohref', 'noshade', 'nowrap', 'multiple', 'noresize');
        if (is_array($value)) {
            $value = '';
        }

        if (in_array($key, $minimizedAttributes)) {
            if ($value === 1 || $value === true || $value === 'true' || $value == $key) {
                $attribute = sprintf($attributeFormat, $key, $key);
            }
        } else {
            $attribute = sprintf($attributeFormat, $key, ife($escape, h($value), $value));
        }
        return $attribute;
    }
/**
 * Sets this helper's model and field properties to the dot-separated value-pair in $entity.
 *
 * @param mixed $entity A field name, like "ModelName.fieldName" or "ModelName.ID.fieldName"
 * @param boolean $setScope Sets the view scope to the model specified in $tagValue
 * @return void
 */
    function setEntity($entity, $setScope = false) {
        $view =& ClassRegistry::getObject('view');

        if ($setScope) {
            $view->modelScope = false;
        } elseif (join('.', $view->entity()) == $entity) {
            return;
        }

        if ($entity === null) {
            $view->model = null;
            $view->association = null;
            $view->modelId = null;
            $view->modelScope = false;
            return;
        }

        $model = $view->model;
        $sameScope = $hasField = false;
        $parts = array_values(Set::filter(preg_split('/\/|\./', $entity), true));

        if (empty($parts)) {
            return;
        }

        if (count($parts) === 1 || is_numeric($parts[0])) {
            $sameScope = true;
        } else {
            if (ClassRegistry::isKeySet($parts[0])) {
                $model = $parts[0];
            }
        }

        if (ClassRegistry::isKeySet($model)) {
            $ModelObj =& ClassRegistry::getObject($model);
            for ($i = 0; $i < count($parts); $i++) {
                if ($ModelObj->hasField($parts[$i]) || array_key_exists($parts[$i], $ModelObj->validate)) {
                    $hasField = $i;
                    if ($hasField === 0 || ($hasField === 1 && is_numeric($parts[0]))) {
                        $sameScope = true;
                    }
                    break;
                }
            }

            if ($sameScope === true && in_array($parts[0], array_keys($ModelObj->hasAndBelongsToMany))) {
                $sameScope = false;
            }
        }

        if (!$view->association && $parts[0] == $view->field && $view->field != $view->model) {
            array_unshift($parts, $model);
            $hasField = true;
        }
        $view->field = $view->modelId = $view->fieldSuffix = $view->association = null;

        switch (count($parts)) {
            case 1:
                if($view->modelScope === false) {
                    $view->model = $parts[0];
                } else {
                    $view->field = $parts[0];
                    if($sameScope === false) {
                        $view->association = $parts[0];
                    }
                }
            break;
            case 2:
                if ($view->modelScope === false) {
                    list($view->model, $view->field) = $parts;
                } elseif ($sameScope === true && $hasField === 0) {
                    list($view->field, $view->fieldSuffix) = $parts;
                } elseif ($sameScope === true && $hasField === 1) {
                    list($view->modelId, $view->field) = $parts;
                } else {
                    list($view->association, $view->field) = $parts;
                }
            break;
            case 3:
                if ($sameScope === true && $hasField === 1) {
                    list($view->modelId, $view->field, $view->fieldSuffix) = $parts;
                } elseif ($hasField === 2) {
                    list($view->association, $view->modelId, $view->field) = $parts;
                } else {
                    list($view->association, $view->field, $view->fieldSuffix) = $parts;
                }
            break;
            case 4:
                if ($parts[0] === $view->model) {
                    list($view->model, $view->modelId, $view->field, $view->fieldSuffix) = $parts;
                } else {
                    list($view->association, $view->modelId, $view->field, $view->fieldSuffix) = $parts;
                }
            break;
        }

        if (!isset($view->model) || empty($view->model)) {
            $view->model = $view->association;
            $view->association = null;
        } elseif ($view->model === $view->association) {
            $view->association = null;
        }

        if ($setScope) {
            $view->modelScope = true;
        }
    }
/**
 * Gets the currently-used model of the rendering context.
 *
 * @return string
 */
    function model() {
        $view =& ClassRegistry::getObject('view');
        if (!empty($view->association)) {
            return $view->association;
        } else {
            return $view->model;
        }
    }
/**
 * Gets the ID of the currently-used model of the rendering context.
 *
 * @return mixed
 */
    function modelID() {
        $view =& ClassRegistry::getObject('view');
        return $view->modelId;
    }
/**
 * Gets the currently-used model field of the rendering context.
 *
 * @return string
 */
    function field() {
        $view =& ClassRegistry::getObject('view');
        return $view->field;
    }
/**
 * Returns false if given FORM field has no errors. Otherwise it returns the constant set in the array Model->validationErrors.
 *
 * @param string $model     Model name as string
 * @param string $field     Fieldname as string
 * @param integer $modelID  Unique index identifying this record within the form
 * @return boolean True on errors.
 */
    function tagIsInvalid($model = null, $field = null, $modelID = null) {
        foreach (array('model', 'field', 'modelID') as $key) {
            if (empty(${$key})) {
                ${$key} = $this->{$key}();
            }
        }
        $view =& ClassRegistry::getObject('view');
        $errors = $this->validationErrors;

        if ($view->model !== $model && isset($errors[$view->model][$model])) {
            $errors = $errors[$view->model];
        }

        if (!isset($modelID)) {
            return empty($errors[$model][$field]) ? 0 : $errors[$model][$field];
        } else {
            return empty($errors[$model][$modelID][$field]) ? 0 : $errors[$model][$modelID][$field];
        }
    }
/**
 * Generates a DOM ID for the selected element, if one is not set.
 *
 * @param mixed $options
 * @param string $id
 * @return mixed
 */
    function domId($options = null, $id = 'id') {
        $view =& ClassRegistry::getObject('view');

        if (is_array($options) && array_key_exists($id, $options) && $options[$id] === null) {
            unset($options[$id]);
            return $options;
        } elseif (!is_array($options) && $options !== null) {
            $this->setEntity($options);
            return $this->domId();
        }

        $dom = $this->model() . $this->modelID() . Inflector::camelize($view->field) . Inflector::camelize($view->fieldSuffix);

        if (is_array($options) && !array_key_exists($id, $options)) {
            $options[$id] = $dom;
        } elseif ($options === null) {
            return $dom;
        }
        return $options;
    }
/**
 * Gets the input field name for the current tag
 *
 * @param array $options
 * @param string $key
 * @return array
 */
    function __name($options = array(), $field = null, $key = 'name') {
        $view =& ClassRegistry::getObject('view');

        if ($options === null) {
            $options = array();
        } elseif (is_string($options)) {
            $field = $options;
            $options = 0;
        }

        if (!empty($field)) {
            $this->setEntity($field);
        }

        if (is_array($options) && array_key_exists($key, $options)) {
            return $options;
        }

        switch ($field) {
            case '_method':
                $name = $field;
            break;
            default:
                $name = 'data[' . join('][', $view->entity()) . ']';
            break;
        }

        if (is_array($options)) {
            $options[$key] = $name;
            return $options;
        } else {
            return $name;
        }
    }
/**
 * Gets the data for the current tag
 *
 * @param array $options
 * @param string $key
 * @return array
 * @access public
 */
    function value($options = array(), $field = null, $key = 'value') {
        if ($options === null) {
            $options = array();
        } elseif (is_string($options)) {
            $field = $options;
            $options = 0;
        }

        if (!empty($field)) {
            $this->setEntity($field);
        }

        if (is_array($options) && isset($options[$key])) {
            return $options;
        }

        $result = null;

        if (isset($this->data[$this->model()][$this->field()])) {
            $result = $this->data[$this->model()][$this->field()];
        } elseif (isset($this->data[$this->field()]) && is_array($this->data[$this->field()])) {
            if (ClassRegistry::isKeySet($this->field())) {
                $model =& ClassRegistry::getObject($this->field());
                $result = $this->__selectedArray($this->data[$this->field()], $model->primaryKey);
            }
        } elseif (isset($this->data[$this->model()][$this->modelID()][$this->field()])) {
            $result = $this->data[$this->model()][$this->modelID()][$this->field()];
        }

        if (is_array($result)) {
            $view =& ClassRegistry::getObject('view');
            if(isset($result[$view->fieldSuffix])) {
                $result = $result[$view->fieldSuffix];
            }
        }

        if (is_array($options)) {
            if (empty($result) && isset($options['default'])) {
                $result = $options['default'];
            }
            unset($options['default']);
        }

        if (is_array($options)) {
            $options[$key] = $result;
            return $options;
        } else {
            return $result;
        }
    }
/**
 * Sets the defaults for an input tag
 *
 * @param array $options
 * @param string $key
 * @return array
 */
    function __initInputField($field, $options = array()) {
        if ($field !== null) {
            $this->setEntity($field);
        }
        $options = (array)$options;
        $options = $this->__name($options);
        $options = $this->value($options);
        $options = $this->domId($options);
        if ($this->tagIsInvalid()) {
            $options = $this->addClass($options, 'form-error');
        }
        return $options;
    }
/**
 * Adds the given class to the element options
 *
 * @param array $options
 * @param string $class
 * @param string $key
 * @return array
 */
    function addClass($options = array(), $class = null, $key = 'class') {
        if (isset($options[$key]) && trim($options[$key]) != '') {
            $options[$key] .= ' ' . $class;
        } else {
            $options[$key] = $class;
        }
        return $options;
    }
/**
 * Returns a string generated by a helper method
 *
 * This method can be overridden in subclasses to do generalized output post-processing
 *
 * @param  string  $str String to be output.
 * @return string
 */
    function output($str) {
        return $str;
    }
/**
 * Assigns values to tag templates.
 *
 * Finds a tag template by $keyName, and replaces $values's keys with
 * $values's keys.
 *
 * @param  string $keyName Name of the key in the tag array.
 * @param  array  $values  Values to be inserted into tag.
 * @return string Tag with inserted values.
 */
    function assign($keyName, $values) {
        $out = $keyName;
        if (isset($this->tags) && isset($this->tags[$keyName])) {
            $out = $this->tags[$keyName];
        }

        //$out =
    }
/**
 * Before render callback.  Overridden in subclasses.
 *
 */
    function beforeRender() {
    }
/**
 * After render callback.  Overridden in subclasses.
 *
 */
    function afterRender() {
    }
/**
 * Before layout callback.  Overridden in subclasses.
 *
 */
    function beforeLayout() {
    }
/**
 * After layout callback.  Overridden in subclasses.
 *
 */
    function afterLayout() {
    }
/**
 * Transforms a recordset from a hasAndBelongsToMany association to a list of selected
 * options for a multiple select element
 *
 * @param mixed $data
 * @param string $key
 * @return array
 * @access private
 */
    function __selectedArray($data, $key = 'id') {
        if (!is_array($data)) {
            $model = $data;
            if (!empty($this->data[$model][$model])) {
                return $this->data[$model][$model];
            }
            if (!empty($this->data[$model])) {
                $data = $this->data[$model];
            }
        }
        $array = array();
        if (!empty($data)) {
            foreach ($data as $var) {
                $array[$var[$key]] = $var[$key];
            }
        }
        return $array;
    }
/**
 * Resets the vars used by Helper::clean() to null
 *
 * @access private
 */
    function __reset() {
        $this->__tainted = null;
        $this->__cleaned = null;
    }
/**
 * Removes harmful content from output
 *
 * @access private
 */
    function __clean() {
        if (get_magic_quotes_gpc()) {
            $this->__cleaned = stripslashes($this->__tainted);
        } else {
            $this->__cleaned = $this->__tainted;
        }

        $this->__cleaned = str_replace(array("&amp;","&lt;","&gt;"),array("&amp;amp;","&amp;lt;","&amp;gt;"), $this->__cleaned);
        $this->__cleaned = preg_replace('#(&\#*\w+)[\x00-\x20]+;#u',"$1;", $this->__cleaned);
        $this->__cleaned = preg_replace('#(&\#x*)([0-9A-F]+);*#iu',"$1$2;", $this->__cleaned);
        $this->__cleaned = html_entity_decode($this->__cleaned, ENT_COMPAT, "UTF-8");
        $this->__cleaned = preg_replace('#(<*[^>]*[\x00-\x20\"\'])(on|xmlns)[^>]*>#iUu',"$1>", $this->__cleaned);
        $this->__cleaned = preg_replace('#([a-z]*)[\x00-\x20]*=[\x00-\x20]*([\`\'\"]*)[\\x00-\x20]*j[\x00-\x20]*a[\x00-\x20]*v[\x00-\x20]*a[\x00-\x20]*s[\x00-\x20]*c[\x00-\x20]*r[\x00-\x20]*i[\x00-\x20]*p[\x00-\x20]*t[\x00-\x20]*:#iUu','$1=$2nojavascript...', $this->__cleaned);
        $this->__cleaned = preg_replace('#([a-z]*)[\x00-\x20]*=([\'\"]*)[\x00-\x20]*v[\x00-\x20]*b[\x00-\x20]*s[\x00-\x20]*c[\x00-\x20]*r[\x00-\x20]*i[\x00-\x20]*p[\x00-\x20]*t[\x00-\x20]*:#iUu','$1=$2novbscript...', $this->__cleaned);
        $this->__cleaned = preg_replace('#([a-z]*)[\x00-\x20]*=*([\'\"]*)[\x00-\x20]*-moz-binding[\x00-\x20]*:#iUu','$1=$2nomozbinding...', $this->__cleaned);
        $this->__cleaned = preg_replace('#(<[^>]+)style[\x00-\x20]*=[\x00-\x20]*([\`\'\"]*).*expression[\x00-\x20]*\([^>]*>#iU',"$1>", $this->__cleaned);
        $this->__cleaned = preg_replace('#(<[^>]+)style[\x00-\x20]*=[\x00-\x20]*([\`\'\"]*).*behaviour[\x00-\x20]*\([^>]*>#iU',"$1>", $this->__cleaned);
        $this->__cleaned = preg_replace('#(<[^>]+)style[\x00-\x20]*=[\x00-\x20]*([\`\'\"]*).*s[\x00-\x20]*c[\x00-\x20]*r[\x00-\x20]*i[\x00-\x20]*p[\x00-\x20]*t[\x00-\x20]*:*[^>]*>#iUu',"$1>",$this->__cleaned);
        $this->__cleaned = preg_replace('#</*\w+:\w[^>]*>#i',"", $this->__cleaned);
        do {
            $oldstring = $this->__cleaned;
            $this->__cleaned = preg_replace('#</*(applet|meta|xml|blink|link|style|script|embed|object|iframe|frame|frameset|ilayer|layer|bgsound|title|base)[^>]*>#i',"",$this->__cleaned);
        } while ($oldstring != $this->__cleaned);
    }

/**
 * @deprecated
 */
    function setFormTag($tagValue, $setScope = false) {
        trigger_error(__('Helper::setFormTag() Deprecated, use Helper::setEntity()', true), E_USER_WARNING);
        return $this->setEntity($tagValue, $setScope);
    }
}
?>

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