AsyncTable::hasClassAnnotation()   A
last analyzed

Complexity

Conditions 1
Paths 1

Size

Total Lines 4

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 0
CRAP Score 2

Importance

Changes 0
Metric Value
dl 0
loc 4
c 0
b 0
f 0
ccs 0
cts 4
cp 0
rs 10
cc 1
nc 1
nop 1
crap 2
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<?php declare(strict_types=1);
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namespace WyriHaximus\React\Cake\Orm;
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use Cake\ORM\Query;
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use Cake\ORM\TableRegistry;
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use Doctrine\Common\Annotations\AnnotationReader;
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use phpDocumentor\Reflection\DocBlock;
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use phpDocumentor\Reflection\DocBlockFactory;
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use React\Promise\PromiseInterface;
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use WyriHaximus\React\Cake\Orm\Annotations\Async;
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use WyriHaximus\React\Cake\Orm\Annotations\Sync;
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trait AsyncTable
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{
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    /**
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     * @var Pool
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     */
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    private $pool;
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    /**
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     * @var string
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     */
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    private $tableName;
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    /**
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     * @var AnnotationReader
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     */
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    private $annotationReader;
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    /**
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     * @var \ReflectionClass
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     */
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    private $reflectionClass;
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    /**
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     * @param Pool   $pool
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     * @param string $tableName
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     * @param mixed  $tableClass
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     */
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    public function setUpAsyncTable(Pool $pool, $tableName, $tableClass)
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    {
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        $this->pool = $pool;
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        $this->tableName = $tableName;
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        $this->annotationReader = new AnnotationReader();
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        $this->reflectionClass = new \ReflectionClass($tableClass);
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    }
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    /**
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     * @param $function
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     * @param  array            $arguments
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     * @return PromiseInterface
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     */
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    protected function callAsyncOrSync($function, $arguments)
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    {
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        if ($this->pool === null) {
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            return (new $this->tableName())->$function(...$arguments);
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        }
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        if (
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            $this->returnsQuery($function) ||
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            $this->hasMethodAnnotation($function, Async::class) ||
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            (
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                $this->hasClassAnnotation(Async::class) &&
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                $this->hasNoMethodAnnotation($function)
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            ) ||
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            strpos(strtolower($function), 'save') === 0 ||
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            strpos(strtolower($function), 'find') === 0 ||
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            strpos(strtolower($function), 'fetch') === 0 ||
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            strpos(strtolower($function), 'retrieve') === 0
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        ) {
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            return $this->callAsync($function, $arguments);
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        }
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        return $this->callSync($function, $arguments);
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    }
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    /**
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     * @param $function
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     * @param  array            $arguments
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     * @return PromiseInterface
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     */
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    private function callSync($function, array $arguments = [])
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    {
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        $table = TableRegistry::get($this->tableName);
0 ignored issues
show
Deprecated Code introduced by
The method Cake\ORM\TableRegistry::get() has been deprecated with message: 3.6.0 Use \Cake\ORM\Locator\TableLocator::get() instead.

This method has been deprecated. The supplier of the class has supplied an explanatory message.

The explanatory message should give you some clue as to whether and when the method will be removed from the class and what other method or class to use instead.

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        if (isset(class_uses($table)[TableRegistryTrait::class])) {
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            $table->setRegistry(AsyncTableRegistry::class);
0 ignored issues
show
Bug introduced by
The method setRegistry() does not exist on Cake\ORM\Table. Did you maybe mean setRegistryAlias()?

This check marks calls to methods that do not seem to exist on an object.

This is most likely the result of a method being renamed without all references to it being renamed likewise.

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        }
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        return \React\Promise\resolve(
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            call_user_func_array(
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                [
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                    $table,
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                    $function,
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                ],
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                $arguments
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            )
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        );
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    }
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    /**
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     * @param $function
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     * @param  array            $arguments
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     * @return PromiseInterface
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     */
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    private function callAsync($function, array $arguments = [])
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    {
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        $unSerialize = function ($input) {
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            if (is_string($input)) {
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                return unserialize($input);
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            }
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            return $input;
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        };
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        return $this->
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            pool->
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            call(get_parent_class($this), $this->tableName, $function, $arguments)->
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            then($unSerialize, $unSerialize, $unSerialize)
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        ;
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    }
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    /**
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     * @param $class
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     * @return bool
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     */
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    private function hasClassAnnotation($class)
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    {
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        return is_a($this->annotationReader->getClassAnnotation($this->reflectionClass, $class), $class);
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    }
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    /**
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     * @param $method
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     * @param $class
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     * @return bool
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     */
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    private function hasMethodAnnotation($method, $class)
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    {
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        $methodReflection = $this->reflectionClass->getMethod($method);
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        return is_a($this->annotationReader->getMethodAnnotation($methodReflection, $class), $class);
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    }
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    /**
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     * @param $method
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     * @return bool
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     */
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    private function hasNoMethodAnnotation($method)
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    {
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        $methodReflection = $this->reflectionClass->getMethod($method);
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        return (
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            $this->annotationReader->getMethodAnnotation($methodReflection, Async::class) === null &&
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            $this->annotationReader->getMethodAnnotation($methodReflection, Sync::class) === null
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        );
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    }
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    /**
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     * @param $function
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     * @return bool
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     */
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    private function returnsQuery($function)
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    {
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        $docBlockContents = $this->reflectionClass->getMethod($function)->getDocComment();
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        if (!is_string($docBlockContents)) {
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            return false;
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        }
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        $docBlock = $this->getDocBlock($docBlockContents);
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        foreach ($docBlock->getTags() as $tag) {
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            if ($tag->getName() === 'return' && ltrim($tag->getType(), '\\') == Query::class) {
0 ignored issues
show
Bug introduced by
It seems like you code against a concrete implementation and not the interface phpDocumentor\Reflection\DocBlock\Tag as the method getType() does only exist in the following implementations of said interface: phpDocumentor\Reflection\DocBlock\Tags\Param, phpDocumentor\Reflection\DocBlock\Tags\Property, phpDocumentor\Reflection...Block\Tags\PropertyRead, phpDocumentor\Reflection...lock\Tags\PropertyWrite, phpDocumentor\Reflection\DocBlock\Tags\Return_, phpDocumentor\Reflection\DocBlock\Tags\Throws, phpDocumentor\Reflection\DocBlock\Tags\Var_.

Let’s take a look at an example:

interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}

In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.

Available Fixes

  1. Change the type-hint for the parameter:

    class AuthSystem
    {
        public function authenticate(MyUser $user) { /* ... */ }
    }
    
  2. Add an additional type-check:

    class AuthSystem
    {
        public function authenticate(User $user)
        {
            if ($user instanceof MyUser) {
                $this->logger->info(/** ... */);
            }
    
            // or alternatively
            if ( ! $user instanceof MyUser) {
                throw new \LogicException(
                    '$user must be an instance of MyUser, '
                   .'other instances are not supported.'
                );
            }
    
        }
    }
    
Note: PHP Analyzer uses reverse abstract interpretation to narrow down the types inside the if block in such a case.
  1. Add the method to the interface:

    interface User
    {
        /** @return string */
        public function getPassword();
    
        /** @return string */
        public function getDisplayName();
    }
    
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                return true;
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            }
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        }
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        return false;
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    }
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    /**
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     * @param $docBlockContents
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     * @return DocBlock
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     */
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    private function getDocBlock($docBlockContents)
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    {
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        if (class_exists('phpDocumentor\Reflection\DocBlockFactory')) {
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            return DocBlockFactory::createInstance()->create($docBlockContents);
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        }
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        return new DocBlock($docBlockContents);
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    }
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}
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