cakephp2-php8/lib/Cake/View/Helper.php
Mark Story 89258327c6 Moving entity() and its related attributes to Helper
Removing entity() and its attributes from View.
Having that information on View allowed for unwanted side effects,
and seemed like a break of encapsulation.
2011-06-25 20:02:34 -04:00

817 lines
24 KiB
PHP

<?php
/**
* Backend for helpers.
*
* Internal methods for the Helpers.
*
* PHP 5
*
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright 2005-2011, Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright 2005-2011, Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @package cake.libs.view
* @since CakePHP(tm) v 0.2.9
* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
*/
App::uses('Router', 'Routing');
/**
* Abstract base class for all other Helpers in CakePHP.
* Provides common methods and features.
*
* @package cake.libs.view
*/
class Helper extends Object {
/**
* List of helpers used by this helper
*
* @var array
*/
public $helpers = array();
/**
* A helper lookup table used to lazy load helper objects.
*
* @var array
*/
protected $_helperMap = array();
/**
* The current theme name if any.
*
* @var string
*/
public $theme = null;
/**
* Request object
*
* @var CakeRequest
*/
public $request = null;
/**
* Plugin path
*
* @var string
*/
public $plugin = null;
/**
* Contains model validation errors of form post-backs
*
* @access public
* @var array
*/
public $validationErrors = null;
/**
* Holds tag templates.
*
* @access public
* @var array
*/
public $tags = array();
/**
* Holds the content to be cleaned.
*
* @access private
* @var mixed
*/
private $__tainted = null;
/**
* Holds the cleaned content.
*
* @access private
* @var mixed
*/
private $__cleaned = null;
/**
* The View instance this helper is attached to
*
* @var View
*/
protected $_View;
/**
* A list of strings that should be treated as suffixes, or
* sub inputs for a parent input. This is used for date/time
* inputs primarily.
*
* @var array
*/
protected $_fieldSuffixes = array(
'year', 'month', 'day', 'hour', 'min', 'second', 'meridian'
);
protected $_modelScope;
protected $_association;
protected $_entityPath;
/**
* Default Constructor
*
* @param View $View The View this helper is being attached to.
* @param array $settings Configuration settings for the helper.
*/
public function __construct(View $View, $settings = array()) {
$this->_View = $View;
$this->request = $View->request;
if (!empty($this->helpers)) {
$this->_helperMap = ObjectCollection::normalizeObjectArray($this->helpers);
}
}
/**
* Provide non fatal errors on missing method calls.
*
* @param string $method Method to invoke
* @param array $params Array of params for the method.
*/
public function __call($method, $params) {
trigger_error(__d('cake_dev', 'Method %1$s::%2$s does not exist', get_class($this), $method), E_USER_WARNING);
}
/**
* Lazy loads helpers. Provides access to deprecated request properties as well.
*
* @param string $name Name of the property being accessed.
* @return mixed Helper or property found at $name
*/
public function __get($name) {
if (isset($this->_helperMap[$name]) && !isset($this->{$name})) {
$settings = array_merge((array)$this->_helperMap[$name]['settings'], array('enabled' => false));
$this->{$name} = $this->_View->loadHelper($this->_helperMap[$name]['class'], $settings);
}
if (isset($this->{$name})) {
return $this->{$name};
}
switch ($name) {
case 'base':
case 'here':
case 'webroot':
case 'data':
return $this->request->{$name};
case 'action':
return isset($this->request->params['action']) ? $this->request->params['action'] : '';
case 'params':
return $this->request;
}
}
/**
* Provides backwards compatiblity access for setting values to the request object.
*
* @return void
*/
public function __set($name, $value) {
switch ($name) {
case 'base':
case 'here':
case 'webroot':
case 'data':
return $this->request->{$name} = $value;
case 'action':
return $this->request->params['action'] = $value;
}
return $this->{$name} = $value;
}
/**
* Finds URL for specified action.
*
* Returns a URL pointing at the provided parameters.
*
* @param mixed $url Either a relative string url like `/products/view/23` or
* an array of url parameters. Using an array for urls will allow you to leverage
* the reverse routing features of CakePHP.
* @param boolean $full If true, the full base URL will be prepended to the result
* @return string Full translated URL with base path.
* @link http://book.cakephp.org/view/1448/url
*/
public function url($url = null, $full = false) {
return h(Router::url($url, $full));
}
/**
* Checks if a file exists when theme is used, if no file is found default location is returned
*
* @param string $file The file to create a webroot path to.
* @return string Web accessible path to file.
*/
public function webroot($file) {
$asset = explode('?', $file);
$asset[1] = isset($asset[1]) ? '?' . $asset[1] : null;
$webPath = "{$this->request->webroot}" . $asset[0];
$file = $asset[0];
if (!empty($this->theme)) {
$file = trim($file, '/');
$theme = $this->theme . '/';
if (DS === '\\') {
$file = str_replace('/', '\\', $file);
}
if (file_exists(Configure::read('App.www_root') . 'theme' . DS . $this->theme . DS . $file)) {
$webPath = "{$this->request->webroot}theme/" . $theme . $asset[0];
} else {
$themePath = App::themePath($this->theme);
$path = $themePath . 'webroot' . DS . $file;
if (file_exists($path)) {
$webPath = "{$this->request->webroot}theme/" . $theme . $asset[0];
}
}
}
if (strpos($webPath, '//') !== false) {
return str_replace('//', '/', $webPath . $asset[1]);
}
return $webPath . $asset[1];
}
/**
* Adds a timestamp to a file based resource based on the value of `Asset.timestamp` in
* Configure. If Asset.timestamp is true and debug > 0, or Asset.timestamp == 'force'
* a timestamp will be added.
*
* @param string $path The file path to timestamp, the path must be inside WWW_ROOT
* @return string Path with a timestamp added, or not.
*/
public function assetTimestamp($path) {
$stamp = Configure::read('Asset.timestamp');
$timestampEnabled = $stamp === 'force' || ($stamp === true && Configure::read('debug') > 0);
if ($timestampEnabled && strpos($path, '?') === false) {
$filepath = preg_replace('/^' . preg_quote($this->request->webroot, '/') . '/', '', $path);
$webrootPath = WWW_ROOT . str_replace('/', DS, $filepath);
if (file_exists($webrootPath)) {
return $path . '?' . @filemtime($webrootPath);
}
$segments = explode('/', ltrim($filepath, '/'));
if ($segments[0] === 'theme') {
$theme = $segments[1];
unset($segments[0], $segments[1]);
$themePath = App::themePath($theme) . 'webroot' . DS . implode(DS, $segments);
return $path . '?' . @filemtime($themePath);
} else {
$plugin = Inflector::camelize($segments[0]);
if (CakePlugin::loaded($plugin)) {
unset($segments[0]);
$pluginPath = CakePlugin::path($plugin) . 'webroot' . DS . implode(DS, $segments);
return $path . '?' . @filemtime($pluginPath);
}
}
}
return $path;
}
/**
* Used to remove harmful tags from content. Removes a number of well known XSS attacks
* from content. However, is not guaranteed to remove all possibilities. Escaping
* content is the best way to prevent all possible attacks.
*
* @param mixed $output Either an array of strings to clean or a single string to clean.
* @return cleaned content for output
*/
public function clean($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' (string)
* - 1 (integer)
* - true (boolean)
* - 'true' (string)
*
* 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.
*
* 'escape' is a special option in that it controls the conversion of
* attributes to their html-entity encoded equivalents. Set to false to disable html-encoding.
*
* If value for any option key is set to `null` or `false`, that option will be excluded from output.
*
* @param array $options Array of options.
* @param array $exclude Array of options to be excluded, the options here will not be part of the return.
* @param string $insertBefore String to be inserted before options.
* @param string $insertAfter String to be inserted after options.
* @return string Composed attributes.
*/
protected function _parseAttributes($options, $exclude = null, $insertBefore = ' ', $insertAfter = null) {
if (!is_string($options)) {
$options = (array) $options + array('escape' => true);
if (!is_array($exclude)) {
$exclude = array();
}
$exclude = array('escape' => true) + array_flip($exclude);
$escape = $options['escape'];
$attributes = array();
foreach ($options as $key => $value) {
if (!isset($exclude[$key]) && $value !== false && $value !== null) {
$attributes[] = $this->_formatAttribute($key, $value, $escape);
}
}
$out = implode(' ', $attributes);
} else {
$out = $options;
}
return $out ? $insertBefore . $out . $insertAfter : '';
}
/**
* Formats an individual attribute, and returns the string value of the composed attribute.
* Works with minimized attributes that have the same value as their name such as 'disabled' and 'checked'
*
* @param string $key The name of the attribute to create
* @param string $value The value of the attribute to create.
* @return string The composed attribute.
*/
protected function _formatAttribute($key, $value, $escape = true) {
$attribute = '';
if (is_array($value)) {
$value = '';
}
if (is_numeric($key)) {
$attribute = sprintf($this->_minimizedAttributeFormat, $value, $value);
} elseif (in_array($key, $this->_minimizedAttributes)) {
if ($value === 1 || $value === true || $value === 'true' || $value === '1' || $value == $key) {
$attribute = sprintf($this->_minimizedAttributeFormat, $key, $key);
}
} else {
$attribute = sprintf($this->_attributeFormat, $key, ($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 $tagValue
* @return void
*/
public function setEntity($entity, $setScope = false) {
if ($entity === null) {
$this->_modelScope = false;
}
if ($setScope === true) {
$this->_modelScope = $entity;
}
$parts = array_values(Set::filter(explode('.', $entity), true));
if (empty($parts)) {
return;
}
$count = count($parts);
$lastPart = isset($parts[$count - 1]) ? $parts[$count - 1] : null;
// Either 'body' or 'date.month' type inputs.
if (
($count === 1 &&
$this->_modelScope &&
$setScope == false) ||
(in_array($lastPart, $this->_fieldSuffixes) &&
$this->_modelScope &&
$parts[0] !== $this->_modelScope)
) {
$entity = $this->_modelScope . '.' . $entity;
}
// 0.name style inputs.
if (
$count === 2 &&
is_numeric($parts[0]) &&
!is_numeric($parts[1])
) {
$entity = $this->_modelScope . '.' . $entity;
}
$this->_association = null;
// check for associated model.
$reversed = array_reverse($parts);
foreach ($reversed as $part) {
if (preg_match('/^[A-Z]/', $part)) {
$this->_association = $part;
break;
}
}
// habtm models are special
if (
isset($this->fieldset[$this->_modelScope]['fields'][$parts[0]]['type']) &&
$this->fieldset[$this->_modelScope]['fields'][$parts[0]]['type'] === 'multiple'
) {
$entity = $parts[0] . '.' . $parts[0];
}
$this->_entityPath = $entity;
return;
}
/**
* Returns the entity reference of the current context as an array of identity parts
*
* @return array An array containing the identity elements of an entity
*/
public function entity() {
return explode('.', $this->_entityPath);
}
/**
* Gets the currently-used model of the rendering context.
*
* @return string
*/
public function model() {
if ($this->_association) {
return $this->_association;
}
return $this->_modelScope;
}
/**
* Gets the currently-used model field of the rendering context.
*
* @return string
*/
public function field() {
$entity = $this->entity();
$count = count($entity);
$last = $entity[$count - 1];
if (in_array($last, $this->_fieldSuffixes)) {
$last = isset($entity[$count - 2]) ? $entity[$count - 2] : null;
}
return $last;
}
/**
* 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 a string
* @param string $field Fieldname as a string
* @param integer $modelID Unique index identifying this record within the form
* @return boolean True on errors.
*/
public function tagIsInvalid($model = null, $field = null, $modelID = null) {
$errors = $this->validationErrors;
$entity = $this->entity();
if (!empty($entity)) {
return Set::extract($errors, join('.', $entity));
}
}
/**
* Generates a DOM ID for the selected element, if one is not set.
* Uses the current View::entity() settings to generate a CamelCased id attribute.
*
* @param mixed $options Either an array of html attributes to add $id into, or a string
* with a view entity path to get a domId for.
* @param string $id The name of the 'id' attribute.
* @return mixed If $options was an array, an array will be returned with $id set. If a string
* was supplied, a string will be returned.
* @todo Refactor this method to not have as many input/output options.
*/
public function domId($options = null, $id = 'id') {
if (is_array($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();
}
$entity = $this->entity();
$model = array_shift($entity);
$dom = $model . join('', array_map(array('Inflector', 'camelize'), $entity));
if (is_array($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. Creates input name attributes
* using CakePHP's data[Model][field] formatting.
*
* @param mixed $options If an array, should be an array of attributes that $key needs to be added to.
* If a string or null, will be used as the View entity.
* @param string $field
* @param string $key The name of the attribute to be set, defaults to 'name'
* @return mixed If an array was given for $options, an array with $key set will be returned.
* If a string was supplied a string will be returned.
* @access protected
* @todo Refactor this method to not have as many input/output options.
*/
protected function _name($options = array(), $field = null, $key = 'name') {
if ($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[' . implode('][', $this->entity()) . ']';
break;
}
if (is_array($options)) {
$options[$key] = $name;
return $options;
} else {
return $name;
}
}
/**
* Gets the data for the current tag
*
* @param mixed $options If an array, should be an array of attributes that $key needs to be added to.
* If a string or null, will be used as the View entity.
* @param string $field
* @param string $key The name of the attribute to be set, defaults to 'value'
* @return mixed If an array was given for $options, an array with $key set will be returned.
* If a string was supplied a string will be returned.
* @access public
* @todo Refactor this method to not have as many input/output options.
*/
public function value($options = array(), $field = null, $key = 'value') {
if ($options === null) {
$options = array();
} elseif (is_string($options)) {
$field = $options;
$options = 0;
}
if (is_array($options) && isset($options[$key])) {
return $options;
}
if (!empty($field)) {
$this->setEntity($field);
}
$result = null;
$data = $this->request->data;
$entity = $this->entity();
if (!empty($data) && !empty($entity)) {
$result = Set::extract($data, implode('.', $entity));
}
$habtmKey = $entity[0];
if (empty($result) && isset($data[$habtmKey][$habtmKey]) && is_array($data[$habtmKey])) {
$result = $data[$habtmKey][$habtmKey];
} elseif (empty($result) && isset($data[$habtmKey]) && is_array($data[$habtmKey])) {
if (ClassRegistry::isKeySet($habtmKey)) {
$model = ClassRegistry::getObject($habtmKey);
$result = $this->__selectedArray($data[$habtmKey], $model->primaryKey);
}
}
if (is_array($options)) {
if ($result === null && isset($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. Will set the
* name, value, and id attributes for an array of html attributes. Will also
* add a 'form-error' class if the field contains validation errors.
*
* @param string $field The field name to initialize.
* @param array $options Array of options to use while initializing an input field.
* @return array Array options for the form input.
*/
protected function _initInputField($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 Array options/attributes to add a class to
* @param string $class The classname being added.
* @param string $key the key to use for class.
* @return array Array of options with $key set.
*/
public function addClass($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 $str String to be output.
* @return string
* @deprecated This method will be removed in future versions.
*/
public function output($str) {
return $str;
}
/**
* Before render callback. beforeRender is called before the view file is rendered.
*
* Overridden in subclasses.
*
* @param string $viewFile The view file that is going to be rendered
* @return void
*/
public function beforeRender($viewFile) {
}
/**
* After render callback. afterRender is called after the view file is rendered
* but before the layout has been rendered.
*
* Overridden in subclasses.
*
* @param string $viewFile The view file that was rendered.
* @return void
*/
public function afterRender($viewFile) {
}
/**
* Before layout callback. beforeLayout is called before the layout is rendered.
*
* Overridden in subclasses.
*
* @param string $layoutFile The layout about to be rendered.
* @return void
*/
public function beforeLayout($layoutFile) {
}
/**
* After layout callback. afterLayout is called after the layout has rendered.
*
* Overridden in subclasses.
*
* @param string $layoutFile The layout file that was rendered.
* @return void
*/
public function afterLayout($layoutFile) {
}
/**
* Transforms a recordset from a hasAndBelongsToMany association to a list of selected
* options for a multiple select element
*
* @param mixed $data
* @param string $key
* @return array
* @access private
*/
private function __selectedArray($data, $key = 'id') {
if (!is_array($data)) {
$model = $data;
if (!empty($this->request->data[$model][$model])) {
return $this->request->data[$model][$model];
}
if (!empty($this->request->data[$model])) {
$data = $this->request->data[$model];
}
}
$array = array();
if (!empty($data)) {
foreach ($data as $row) {
if (isset($row[$key])) {
$array[$row[$key]] = $row[$key];
}
}
}
return empty($array) ? null : $array;
}
/**
* Resets the vars used by Helper::clean() to null
*
* @return void
* @access private
*/
private function __reset() {
$this->__tainted = null;
$this->__cleaned = null;
}
/**
* Removes harmful content from output
*
* @return void
* @access private
*/
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('#([a-z]*)[\x00-\x20]*=([\'\"]*)[\x00-\x20]*data[\x00-\x20]*:#Uu', '$1=$2nodata...', $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);
$this->__cleaned = str_replace(array("&amp;", "&lt;", "&gt;"), array("&amp;amp;", "&amp;lt;", "&amp;gt;"), $this->__cleaned);
}
}