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<?php |
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/** |
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* TBehaviorsModule class |
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* |
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* @author Brad Anderson <[email protected]> |
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* @link https://github.com/pradosoft/prado |
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* @license https://github.com/pradosoft/prado/blob/master/LICENSE |
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*/ |
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namespace Prado\Util; |
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use Prado\Exceptions\TConfigurationException; |
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use Prado\Exceptions\TInvalidDataTypeException; |
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use Prado\TApplication; |
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use Prado\TComponent; |
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use Prado\Xml\TXmlDocument; |
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use Prado\Xml\TXmlElement; |
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/** |
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* TBehaviorsModule class. |
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* |
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* TBehaviorsModule loads and attaches {@link TBehavior}. This attaches |
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* Behaviors to classes and to application components like the TApplication, |
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* individual modules, and TPage of the TPageService. |
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* |
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* Contents enclosed within the module tag are treated as behaviors, e.g., |
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* <code> |
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* <module class="Prado\Util\TBehaviorsModule" Parameter="AdditionalBehaviors"> |
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* <behavior Name="pagethemeparameter" Class="Prado\Util\Behaviors\TParameterizeBehavior" AttachToClass="Prade\Web\UI\TPage" Priority="10" Parameter="ThemeName" Property="Theme"/> |
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* <behavior Name="sharedModuleBehavior" Class="FooModuleBehavior" AttachToClass="Prado\TModule" Attribute1="abc"/> |
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* <behavior name="TimeZoneBehavior" Class="Prado\Util\Behaviors\TTimeZoneParameterBehavior" AttachTo="Application" Priority="10" TimeZone="America/New York" TimeZoneParameter="prop:TimeZone" /> |
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* <behavior name="MyModuleBehavior" Class="MyModuleBehavior" AttachTo="Module:page" Property1="Value1" Property2="Value2" ... /> |
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* <behavior name="MyPageTitleBehavior" Class="Prado\Util\Behaviors\TParameterizeBehavior" AttachTo="Page" Priority="10" Parameter="PageTitle" Property="Title" Localize="true"/> |
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* </module> |
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* </code> |
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* |
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* When the Service is not TPageService, page behaviors are not installed and have no effect other than be ignored. |
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* |
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* When {@link setAdditionalBehaviors AdditionalBehaviors} is set, this module |
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* loads the behaviors from that property. It can be an array of php behavior definition arrays. |
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* or a string that is then passed through unserialize or json_decode; otherwise is treated as |
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* an xml document of behavior like above. |
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* |
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* The format is in the PHP style module configuration: |
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* </code> |
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* [['name' => 'behaviorname', 'class' => 'TMyBehaviorClass', 'attachto' => 'page', 'priority' => '10', 'behaviorProperty'=>"value1'], ...] |
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* </code> |
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* |
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* This allows TBehaviorsModule to load behaviors, dynamically, from parameters with the TParameterizeBehavior. |
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* |
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* Multiple TBehaviorsModules can be instanced, for instance, a second set of behaviors |
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* could be configured in TPageService. The second TBehaviorsModule can reference |
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* behaviors from the first to attach its behaviors. |
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* |
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* @author Brad Anderson <[email protected]> |
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* @since 4.2.0 |
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*/ |
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class TBehaviorsModule extends \Prado\TModule |
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{ |
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/** |
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* @var IBaseBehavior[] loaded behaviors. |
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*/ |
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private static $_behaviors = []; |
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/** |
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* @var IBaseBehavior[] behaviors attaching to the TPage |
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*/ |
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private $_pageBehaviors = []; |
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/** |
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* @var array[] delayed behaviors attaching to the loaded behaviors |
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*/ |
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private $_behaviorBehaviors = []; |
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/** |
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* @var array[] additional behaviors in a configuration format: array[], serialized php object, json object, string of xml |
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*/ |
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private $_additionalBehaviors; |
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/** |
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* Constructor. |
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*/ |
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public function __construct() |
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{ |
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parent::__construct(); |
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} |
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/** |
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* Initializes the module by loading behaviors. If there are page behaviors, this |
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* attaches behaviors to TPage through TApplication::onBeginRequest and then |
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* TPageService::onPreRunPage. |
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* @param \Prado\Xml\TXmlElement $config configuration for this module, can be null |
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*/ |
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public function init($config) |
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{ |
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$this->loadBehaviors($config); |
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$this->loadBehaviors(['behaviors' => $this->getAdditionalBehaviors()]); |
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if (count($this->_pageBehaviors)) { |
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$this->getApplication()->attachEventHandler('onBeginRequest', [$this, 'attachTPageServiceHandler']); |
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} |
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foreach ($this->_behaviorBehaviors as $target => $behaviors) { |
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if (!isset(self::$_behaviors[$target])) { |
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throw new TConfigurationException('behaviormodule_behaviorowner_required', 'behavior:' . $target); |
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} |
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$owner = self::$_behaviors[$target]; |
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$owner = is_a($owner, '\WeakReference') ? $owner->get() : $owner; |
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foreach ($behaviors as $properties) { |
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$priority = $properties['priority'] ?? null; |
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unset($properties['priority']); |
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$name = $properties['name']; |
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unset($properties['name']); |
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$owner->attachBehavior($name, $properties, $priority); |
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} |
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} |
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$this->_behaviorBehaviors = []; |
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parent::init($config); |
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} |
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/** |
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* TApplication::onBeginRequest Handler that adds {@link attachTPageBehaviors} to |
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* TPageService::onPreRunPage. In turn, this attaches {@link attachTPageBehaviors} |
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* to TPageService to then adds the page behaviors. |
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* @param object $sender the object that raised the event |
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* @param mixed $param parameter of the event |
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*/ |
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public function attachTPageServiceHandler($sender, $param) |
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{ |
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$service = $this->getService(); |
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if ($service instanceof \Prado\Web\Services\TPageService) { |
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$service->attachEventHandler('onPreRunPage', [$this, 'attachTPageBehaviors']); |
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} |
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} |
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/** |
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* This method attaches page behaviors to the TPage handling the TPageService::OnPreInitPage event. |
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* @param object $sender the object that raised the event |
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* @param \Prado\Web\UI\TPage $page the page being initialized |
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*/ |
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public function attachTPageBehaviors($sender, $page) |
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{ |
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foreach ($this->_pageBehaviors as $name => $properties) { |
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$priority = $properties['priority'] ?? null; |
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unset($properties['priority']); |
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$page->attachBehavior($name, $properties, $priority); |
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} |
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$this->_pageBehaviors = []; |
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} |
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/** |
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* Loads behaviors and attach to the proper object. behaviors for pages are |
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* attached separately if and when the TPage is loaded on TPageSerivce::onPreRunPage |
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* @param mixed $config XML of PHP representation of the behaviors |
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* @throws \Prado\Exceptions\TConfigurationException if the parameter file format is invalid |
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*/ |
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protected function loadBehaviors($config) |
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{ |
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$isXml = false; |
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if ($config instanceof TXmlElement) { |
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$isXml = true; |
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$config = $config->getElementsByTagName('behavior'); |
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} elseif (is_array($config)) { |
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$config = $config['behaviors']; |
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} elseif (!$config) { |
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return; |
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} |
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foreach ($config as $properties) { |
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$element = $properties; |
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if ($isXml) { |
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$properties = array_change_key_case($properties->getAttributes()->toArray()); |
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} else { |
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if (!is_array($properties)) { |
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throw new TConfigurationException('behaviormodule_behavior_as_array_required'); |
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} |
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if (isset($properties['properties'])) { |
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$properties = $properties['properties']; |
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unset($element['properties']); |
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$properties['class'] = $element['class']; |
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unset($element['class']); |
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} else { |
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unset($element['name']); |
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unset($element['class']); |
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unset($element['attachto']); |
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unset($element['attachtoclass']); |
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unset($element['priority']); |
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} |
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} |
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$properties[IBaseBehavior::CONFIG_KEY] = $element; |
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$name = $properties['name'] ?? null; |
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unset($properties['name']); |
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if (empty($name) || is_numeric($name)) { |
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$name = null; |
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} |
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$attachTo = $properties['attachto'] ?? null; |
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$attachToClass = $properties['attachtoclass'] ?? null; |
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unset($properties['attachto']); |
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unset($properties['attachtoclass']); |
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if ($attachTo === null && $attachToClass === null) { |
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throw new TConfigurationException('behaviormodule_attachto_class_required'); |
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} elseif ($attachTo !== null && $attachToClass !== null) { |
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throw new TConfigurationException('behaviormodule_attachto_and_class_only_one'); |
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} |
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if ($attachToClass) { |
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$priority = $properties['priority'] ?? null; |
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unset($properties['priority']); |
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$behavior = TComponent::attachClassBehavior($name, $properties, $attachToClass, $priority); |
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} else { |
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if (strtolower($attachTo) == "page") { |
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$this->_pageBehaviors[$name] = $properties; |
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continue; |
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} elseif (strncasecmp($attachTo, 'module:', 7) === 0) { |
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$owner = $this->getApplication()->getModule(trim(substr($attachTo, 7))); |
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} elseif (strncasecmp($attachTo, 'behavior:', 9) === 0) { |
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$properties['name'] = $name; |
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$this->_behaviorBehaviors[trim(substr($attachTo, 9))][] = $properties; |
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continue; |
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} else { |
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$owner = $this->getSubProperty($attachTo); |
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} |
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$priority = $properties['priority'] ?? null; |
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unset($properties['priority']); |
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if (!$owner) { |
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throw new TConfigurationException('behaviormodule_behaviorowner_required', $attachTo); |
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} |
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$behavior = $owner->attachBehavior($name, $properties, $priority); |
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} |
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if (!is_array($behavior)) { |
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self::$_behaviors[$name] = \WeakReference::create($behavior); |
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} |
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} |
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} |
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/** |
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* @return array additional behaviors in a list. |
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*/ |
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public function getAdditionalBehaviors() |
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{ |
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return $this->_additionalBehaviors ?? []; |
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} |
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/** |
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* this will take a string that is an array of behaviors that has been |
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* through serialize(), or json array of behaviors. If one behavior is |
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* set as an array, then it is automatically placed into an array. |
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* @param array[]|string $behaviors additional behaviors |
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*/ |
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public function setAdditionalBehaviors($behaviors) |
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{ |
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if (is_string($behaviors)) { |
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if (($b = @unserialize($behaviors)) !== false) { |
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$behaviors = $b; |
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} elseif (($b = json_decode($behaviors, true)) !== null) { |
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$behaviors = $b; |
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} else { |
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$xmldoc = new TXmlDocument('1.0', 'utf-8'); |
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$xmldoc->loadFromString($behaviors); |
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$behaviors = $xmldoc; |
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} |
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} |
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if (is_array($behaviors) && isset($behaviors['class'])) { |
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$behaviors = [$behaviors]; |
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} |
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if (!is_array($behaviors) && !($behaviors instanceof TXmlDocument) && $behaviors !== null) { |
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throw new TInvalidDataTypeException('behaviormodule_additional_behaviors_invalid', $behaviors); |
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} |
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$this->_additionalBehaviors = $behaviors ?? []; |
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} |
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} |
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pradosoft /
prado
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