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Helper.php
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Helper.php
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<?php
/**
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* For full copyright and license information, please see the LICENSE.txt
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @since 0.2.9
* @license http://www.opensource.org/licenses/mit-license.php MIT License
*/
namespace Cake\View;
use Cake\Core\App;
use Cake\Core\Configure;
use Cake\Core\InstanceConfigTrait;
use Cake\Core\Plugin;
use Cake\Event\EventListener;
use Cake\Routing\Router;
use Cake\Utility\Hash;
use Cake\Utility\Inflector;
/**
* Abstract base class for all other Helpers in CakePHP.
* Provides common methods and features.
*
* ## Callback methods
*
* Helpers support a number of callback methods. These callbacks allow you to hook into
* the various view lifecycle events and either modify existing view content or perform
* other application specific logic. The events are not implemented by this base class, as
* implementing a callback method subscribes a helper to the related event. The callback methods
* are as follows:
*
* - `beforeRender(Event $event, $viewFile)` - beforeRender is called before the view file is rendered.
* - `afterRender(Event $event, $viewFile)` - afterRender is called after the view file is rendered
* but before the layout has been rendered.
* - beforeLayout(Event $event, $layoutFile)` - beforeLayout is called before the layout is rendered.
* - `afterLayout(Event $event, $layoutFile)` - afterLayout is called after the layout has rendered.
* - `beforeRenderFile(Event $event, $viewFile)` - Called before any view fragment is rendered.
* - `afterRenderFile(Event $event, $viewFile, $content)` - Called after any view fragment is rendered.
* If a listener returns a non-null value, the output of the rendered file will be set to that.
*
*/
class Helper implements EventListener {
use InstanceConfigTrait;
/**
* List of helpers used by this helper
*
* @var array
*/
public $helpers = array();
/**
* Default config for this helper.
*
* @var array
*/
protected $_defaultConfig = [];
/**
* 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 \Cake\Network\Request
*/
public $request = null;
/**
* Plugin path
*
* @var string
*/
public $plugin = null;
/**
* Holds the fields array('field_name' => array('type' => 'string', 'length' => 100),
* primaryKey and validates array('field_name')
*
* @var array
*/
public $fieldset = array();
/**
* Holds tag templates.
*
* @var array
*/
public $tags = array();
/**
* The View instance this helper is attached to
*
* @var View
*/
protected $_View;
/**
* Minimized attributes
*
* @var array
*/
protected $_minimizedAttributes = array(
'compact', 'checked', 'declare', 'readonly', 'disabled', 'selected',
'defer', 'ismap', 'nohref', 'noshade', 'nowrap', 'multiple', 'noresize',
'autoplay', 'controls', 'loop', 'muted', 'required', 'novalidate', 'formnovalidate'
);
/**
* Format to attribute
*
* @var string
*/
protected $_attributeFormat = '%s="%s"';
/**
* Format to attribute
*
* @var string
*/
protected $_minimizedAttributeFormat = '%s="%s"';
/**
* Default Constructor
*
* @param View $View The View this helper is being attached to.
* @param array $config Configuration settings for the helper.
*/
public function __construct(View $View, array $config = array()) {
$this->_View = $View;
$this->request = $View->request;
$this->config($config);
if (!empty($this->helpers)) {
$this->_helperMap = $View->helpers()->normalizeArray($this->helpers);
}
}
/**
* Provide non fatal errors on missing method calls.
*
* @param string $method Method to invoke
* @param array $params Array of params for the method.
* @return void
*/
public function __call($method, $params) {
trigger_error(sprintf('Method %1$s::%2$s does not exist', get_class($this), $method), E_USER_WARNING);
}
/**
* Lazy loads helpers.
*
* @param string $name Name of the property being accessed.
* @return mixed Helper or property found at $name
* @deprecated Accessing request properties through this method is deprecated and will be removed in 3.0.
*/
public function __get($name) {
if (isset($this->_helperMap[$name]) && !isset($this->{$name})) {
$settings = array_merge((array)$this->_helperMap[$name]['config'], array('enabled' => false));
$this->{$name} = $this->_View->addHelper($this->_helperMap[$name]['class'], $this->_config);
}
if (isset($this->{$name})) {
return $this->{$name};
}
}
/**
* Finds URL for specified action.
*
* Returns a URL pointing at the provided parameters.
*
* @param string|array $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 bool $full If true, the full base URL will be prepended to the result
* @return string Full translated URL with base path.
* @link http://book.cakephp.org/2.0/en/views/helpers.html
*/
public function url($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, '/');
$theme = Inflector::underscore($this->theme) . '/';
if (DS === '\\') {
$file = str_replace('/', '\\', $file);
}
if (file_exists(Configure::read('App.www_root') . $theme . $file)) {
$webPath = $this->request->webroot . $theme . $asset[0];
} else {
$themePath = Plugin::path($this->theme);
$path = $themePath . 'webroot/' . $file;
if (file_exists($path)) {
$webPath = $this->request->webroot . $theme . $asset[0];
}
}
}
if (strpos($webPath, '//') !== false) {
return str_replace('//', '/', $webPath . $asset[1]);
}
return $webPath . $asset[1];
}
/**
* Generate URL for given asset file. Depending on options passed provides full URL with domain name.
* Also calls Helper::assetTimestamp() to add timestamp to local files
*
* @param string|array Path string or URL array
* @param array $options Options array. Possible keys:
* `fullBase` Return full URL with domain name
* `pathPrefix` Path prefix for relative URLs
* `ext` Asset extension to append
* `plugin` False value will prevent parsing path as a plugin
* @return string Generated URL
*/
public function assetUrl($path, array $options = array()) {
if (is_array($path)) {
return $this->url($path, !empty($options['fullBase']));
}
if (strpos($path, '://') !== false) {
return $path;
}
if (!array_key_exists('plugin', $options) || $options['plugin'] !== false) {
list($plugin, $path) = $this->_View->pluginSplit($path, false);
}
if (!empty($options['pathPrefix']) && $path[0] !== '/') {
$path = $options['pathPrefix'] . $path;
}
if (
!empty($options['ext']) &&
strpos($path, '?') === false &&
substr($path, -strlen($options['ext'])) !== $options['ext']
) {
$path .= $options['ext'];
}
if (preg_match('|^([a-z0-9]+:)?//|', $path)) {
return $path;
}
if (isset($plugin)) {
$path = Inflector::underscore($plugin) . '/' . $path;
}
$path = $this->_encodeUrl($this->assetTimestamp($this->webroot($path)));
if (!empty($options['fullBase'])) {
$path = rtrim(Router::fullBaseUrl(), '/') . '/' . ltrim($path, '/');
}
return $path;
}
/**
* Encodes a URL for use in HTML attributes.
*
* @param string $url The URL to encode.
* @return string The URL encoded for both URL & HTML contexts.
*/
protected function _encodeUrl($url) {
$path = parse_url($url, PHP_URL_PATH);
$parts = array_map('rawurldecode', explode('/', $path));
$parts = array_map('rawurlencode', $parts);
$encoded = implode('/', $parts);
return h(str_replace($path, $encoded, $url));
}
/**
* Adds a timestamp to a file based resource based on the value of `Asset.timestamp` in
* Configure. If Asset.timestamp is true and debug is true, 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'));
if ($timestampEnabled && strpos($path, '?') === false) {
$filepath = preg_replace(
'/^' . preg_quote($this->request->webroot, '/') . '/',
'',
urldecode($path)
);
$webrootPath = WWW_ROOT . str_replace('/', DS, $filepath);
if (file_exists($webrootPath)) {
//@codingStandardsIgnoreStart
return $path . '?' . @filemtime($webrootPath);
//@codingStandardsIgnoreEnd
}
$segments = explode('/', ltrim($filepath, '/'));
$plugin = Inflector::camelize($segments[0]);
if (Plugin::loaded($plugin)) {
unset($segments[0]);
$pluginPath = Plugin::path($plugin) . 'webroot' . DS . implode(DS, $segments);
//@codingStandardsIgnoreStart
return $path . '?' . @filemtime($pluginPath);
//@codingStandardsIgnoreEnd
}
}
return $path;
}
/**
* Returns a string to be used as onclick handler for confirm dialogs.
*
* @param string $message Message to be displayed
* @param string $okCode Code to be executed after user chose 'OK'
* @param string $cancelCode Code to be executed after user chose 'Cancel'
* @param array $options Array of options
* @return string onclick JS code
*/
protected function _confirm($message, $okCode, $cancelCode = '', $options = array()) {
$message = json_encode($message);
$confirm = "if (confirm({$message})) { {$okCode} } {$cancelCode}";
if (isset($options['escape']) && $options['escape'] === false) {
$confirm = h($confirm);
}
return $confirm;
}
/**
* Adds the given class to the element options
*
* @param array $options Array options/attributes to add a class to
* @param string $class The class name being added.
* @param string $key the key to use for class.
* @return array Array of options with $key set.
*/
public function addClass(array $options = array(), $class = null, $key = 'class') {
if (isset($options[$key]) && trim($options[$key])) {
$options[$key] .= ' ' . $class;
} else {
$options[$key] = $class;
}
return $options;
}
/**
* Get the View callbacks this helper is interested in.
*
* By defining one of the callback methods a helper is assumed
* to be interested in the related event.
*
* Override this method if you need to add non-conventional event listeners.
* Or if you want helpers to listen to non-standard events.
*
* @return array
*/
public function implementedEvents() {
$eventMap = [
'View.beforeRenderFile' => 'beforeRenderFile',
'View.afterRenderFile' => 'afterRenderFile',
'View.beforeRender' => 'beforeRender',
'View.afterRender' => 'afterRender',
'View.beforeLayout' => 'beforeLayout',
'View.afterLayout' => 'afterLayout'
];
$events = [];
foreach ($eventMap as $event => $method) {
if (method_exists($this, $method)) {
$events[$event] = $method;
}
}
return $events;
}
}