<?php

declare(strict_types=1);

/**

* CakePHP(tm) : Rapid Development Framework (https://cakephp.org)

* Copyright (c) Cake Software Foundation, Inc. (https://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. (https://cakefoundation.org)

* @link https://cakephp.org CakePHP(tm) Project

* @since 3.0.0

* @license https://opensource.org/licenses/mit-license.php MIT License

*/

namespace Cake\ORM;

use Cake\Core\Exception\CakeException;

use Cake\Core\InstanceConfigTrait;

use Cake\Event\EventListenerInterface;

use ReflectionClass;

use ReflectionMethod;

/**

* Base class for behaviors.

*

* Behaviors allow you to simulate mixins, and create

* reusable blocks of application logic, that can be reused across

* several models. Behaviors also provide a way to hook into model

* callbacks and augment their behavior.

*

* ### Mixin methods

*

* Behaviors can provide mixin like features by declaring public

* methods. These methods will be accessible on the tables the

* behavior has been added to.

*

* ```

* function doSomething($arg1, $arg2) {

* // do something

* }

* ```

*

* Would be called like `$table->doSomething($arg1, $arg2);`.

*

* ### Callback methods

*

* Behaviors can listen to any events fired on a Table. By default

* CakePHP provides a number of lifecycle events your behaviors can

* listen to:

*

* - `beforeFind(EventInterface $event, Query $query, ArrayObject $options, boolean $primary)`

* Fired before each find operation. By stopping the event and supplying a

* return value you can bypass the find operation entirely. Any changes done

* to the $query instance will be retained for the rest of the find. The

* $primary parameter indicates whether or not this is the root query,

* or an associated query.

*

* - `buildValidator(EventInterface $event, Validator $validator, string $name)`

* Fired when the validator object identified by $name is being built. You can use this

* callback to add validation rules or add validation providers.

*

* - `buildRules(EventInterface $event, RulesChecker $rules)`

* Fired when the rules checking object for the table is being built. You can use this

* callback to add more rules to the set.

*

* - `beforeRules(EventInterface $event, EntityInterface $entity, ArrayObject $options, $operation)`

* Fired before an entity is validated using by a rules checker. By stopping this event,

* you can return the final value of the rules checking operation.

*

* - `afterRules(EventInterface $event, EntityInterface $entity, ArrayObject $options, bool $result, $operation)`

* Fired after the rules have been checked on the entity. By stopping this event,

* you can return the final value of the rules checking operation.

*

* - `beforeSave(EventInterface $event, EntityInterface $entity, ArrayObject $options)`

* Fired before each entity is saved. Stopping this event will abort the save

* operation. When the event is stopped the result of the event will be returned.

*

* - `afterSave(EventInterface $event, EntityInterface $entity, ArrayObject $options)`

* Fired after an entity is saved.

*

* - `beforeDelete(EventInterface $event, EntityInterface $entity, ArrayObject $options)`

* Fired before an entity is deleted. By stopping this event you will abort

* the delete operation.

*

* - `afterDelete(EventInterface $event, EntityInterface $entity, ArrayObject $options)`

* Fired after an entity has been deleted.

*

* In addition to the core events, behaviors can respond to any

* event fired from your Table classes including custom application

* specific ones.

*

* You can set the priority of a behaviors callbacks by using the

* `priority` setting when attaching a behavior. This will set the

* priority for all the callbacks a behavior provides.

*

* ### Finder methods

*

* Behaviors can provide finder methods that hook into a Table's

* find() method. Custom finders are a great way to provide preset

* queries that relate to your behavior. For example a SluggableBehavior

* could provide a find('slugged') finder. Behavior finders

* are implemented the same as other finders. Any method

* starting with `find` will be setup as a finder. Your finder

* methods should expect the following arguments:

*

* ```

* findSlugged(Query $query, array $options)

* ```

*

* @see \Cake\ORM\Table::addBehavior()

* @see \Cake\Event\EventManager

*/

class Behavior implements EventListenerInterface

{

use InstanceConfigTrait;

/**

* Table instance.

*

* @var \Cake\ORM\Table

*/

protected $_table;

/**

* Reflection method cache for behaviors.

*

* Stores the reflected method + finder methods per class.

* This prevents reflecting the same class multiple times in a single process.

*

* @var array

*/

protected static $_reflectionCache = [];

/**

* Default configuration

*

* These are merged with user-provided configuration when the behavior is used.

*

* @var array

*/

protected $_defaultConfig = [];

/**

* Constructor

*

* Merges config with the default and store in the config property

*

* @param \Cake\ORM\Table $table The table this behavior is attached to.

* @param array $config The config for this behavior.

*/

public function __construct(Table $table, array $config = [])

{

$config = $this->_resolveMethodAliases(

'implementedFinders',

$this->_defaultConfig,

$config

);

$config = $this->_resolveMethodAliases(

'implementedMethods',

$this->_defaultConfig,

$config

);

$this->_table = $table;

$this->setConfig($config);

$this->initialize($config);

}

/**

* Constructor hook method.

*

* Implement this method to avoid having to overwrite

* the constructor and call parent.

*

* @param array $config The configuration settings provided to this behavior.

* @return void

*/

public function initialize(array $config): void

{

}

/**

* Get the table instance this behavior is bound to.

*

* @return \Cake\ORM\Table The bound table instance.

* @deprecated 4.2.0 Use table() instead.

*/

public function getTable(): Table

{

deprecationWarning('Behavior::getTable() is deprecated. Use table() instead.');

return $this->table();

}

/**

* Get the table instance this behavior is bound to.

*

* @return \Cake\ORM\Table The bound table instance.

*/

public function table(): Table

{

return $this->_table;

}

/**

* Removes aliased methods that would otherwise be duplicated by userland configuration.

*

* @param string $key The key to filter.

* @param array $defaults The default method mappings.

* @param array $config The customized method mappings.

* @return array A de-duped list of config data.

*/

protected function _resolveMethodAliases(string $key, array $defaults, array $config): array

{

if (!isset($defaults[$key], $config[$key])) {

return $config;

}

if (isset($config[$key]) && $config[$key] === []) {

$this->setConfig($key, [], false);

unset($config[$key]);

return $config;

}

$indexed = array_flip($defaults[$key]);

$indexedCustom = array_flip($config[$key]);

foreach ($indexed as $method => $alias) {

if (!isset($indexedCustom[$method])) {

$indexedCustom[$method] = $alias;

}

}

$this->setConfig($key, array_flip($indexedCustom), false);

unset($config[$key]);

return $config;

}

/**

* verifyConfig

*

* Checks that implemented keys contain values pointing at callable.

*

* @return void

* @throws \Cake\Core\Exception\CakeException if config are invalid

*/

public function verifyConfig(): void

{

$keys = ['implementedFinders', 'implementedMethods'];

foreach ($keys as $key) {

if (!isset($this->_config[$key])) {

continue;

}

foreach ($this->_config[$key] as $method) {

if (!is_callable([$this, $method])) {

throw new CakeException(sprintf(

'The method %s is not callable on class %s',

$method,

static::class

));

}

}

}

}

/**

* Gets the Model callbacks this behavior is interested in.

*

* By defining one of the callback methods a behavior 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 your behavior to listen to non-standard events.

*

* @return array

*/

public function implementedEvents(): array

{

$eventMap = [

'Model.beforeMarshal' => 'beforeMarshal',

'Model.afterMarshal' => 'afterMarshal',

'Model.beforeFind' => 'beforeFind',

'Model.beforeSave' => 'beforeSave',

'Model.afterSave' => 'afterSave',

'Model.afterSaveCommit' => 'afterSaveCommit',

'Model.beforeDelete' => 'beforeDelete',

'Model.afterDelete' => 'afterDelete',

'Model.afterDeleteCommit' => 'afterDeleteCommit',

'Model.buildValidator' => 'buildValidator',

'Model.buildRules' => 'buildRules',

'Model.beforeRules' => 'beforeRules',

'Model.afterRules' => 'afterRules',

];

$config = $this->getConfig();

$priority = $config['priority'] ?? null;

$events = [];

foreach ($eventMap as $event => $method) {

if (!method_exists($this, $method)) {

continue;

}

if ($priority === null) {

$events[$event] = $method;

} else {

$events[$event] = [

'callable' => $method,

'priority' => $priority,

];

}

}

return $events;

}

/**

* implementedFinders

*

* Provides an alias->methodname map of which finders a behavior implements. Example:

*

* ```

* [

* 'this' => 'findThis',

* 'alias' => 'findMethodName'

* ]

* ```

*

* With the above example, a call to `$table->find('this')` will call `$behavior->findThis()`

* and a call to `$table->find('alias')` will call `$behavior->findMethodName()`

*

* It is recommended, though not required, to define implementedFinders in the config property

* of child classes such that it is not necessary to use reflections to derive the available

* method list. See core behaviors for examples

*

* @return array

* @throws \ReflectionException

*/

public function implementedFinders(): array

{

$methods = $this->getConfig('implementedFinders');

if (isset($methods)) {

return $methods;

}

return $this->_reflectionCache()['finders'];

}

/**

* implementedMethods

*

* Provides an alias->methodname map of which methods a behavior implements. Example:

*

* ```

* [

* 'method' => 'method',

* 'aliasedMethod' => 'somethingElse'

* ]

* ```

*

* With the above example, a call to `$table->method()` will call `$behavior->method()`

* and a call to `$table->aliasedMethod()` will call `$behavior->somethingElse()`

*

* It is recommended, though not required, to define implementedFinders in the config property

* of child classes such that it is not necessary to use reflections to derive the available

* method list. See core behaviors for examples

*

* @return array

* @throws \ReflectionException

*/

public function implementedMethods(): array

{

$methods = $this->getConfig('implementedMethods');

if (isset($methods)) {

return $methods;

}

return $this->_reflectionCache()['methods'];

}

/**

* Gets the methods implemented by this behavior

*

* Uses the implementedEvents() method to exclude callback methods.

* Methods starting with `_` will be ignored, as will methods

* declared on Cake\ORM\Behavior

*

* @return array

* @throws \ReflectionException

*/

protected function _reflectionCache(): array

{

$class = static::class;

if (isset(self::$_reflectionCache[$class])) {

return self::$_reflectionCache[$class];

}

$events = $this->implementedEvents();

$eventMethods = [];

foreach ($events as $binding) {

if (is_array($binding) && isset($binding['callable'])) {

/** @var string $callable */

$callable = $binding['callable'];

$binding = $callable;

}

$eventMethods[$binding] = true;

}

$baseClass = self::class;

if (isset(self::$_reflectionCache[$baseClass])) {

$baseMethods = self::$_reflectionCache[$baseClass];

} else {

$baseMethods = get_class_methods($baseClass);

self::$_reflectionCache[$baseClass] = $baseMethods;

}

$return = [

'finders' => [],

'methods' => [],

];

$reflection = new ReflectionClass($class);

foreach ($reflection->getMethods(ReflectionMethod::IS_PUBLIC) as $method) {

$methodName = $method->getName();

if (

in_array($methodName, $baseMethods, true) ||

isset($eventMethods[$methodName])

) {

continue;

}

if (substr($methodName, 0, 4) === 'find') {

$return['finders'][lcfirst(substr($methodName, 4))] = $methodName;

} else {

$return['methods'][$methodName] = $methodName;

}

}

return self::$_reflectionCache[$class] = $return;

}

}