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<?php |
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namespace ntentan\honam\engines\php\helpers\form; |
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use ntentan\honam\exceptions\HonamException; |
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use ntentan\utils\Text; |
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/** |
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* A trait that allows for chaining the methods in form elements. |
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*/ |
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trait ElementFactory |
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{ |
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private $caller; |
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/** |
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* Recursively go through the chain of classes in the form to find one that supplies the required method. |
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*/ |
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public function findMethodClass($name) |
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{ |
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if ($this->caller === null) { |
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return null; |
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} else if (method_exists($this->caller, $name)) { |
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return $this->caller; |
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} else { |
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return $this->caller->findMethodClass($name); |
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} |
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} |
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public function __call($name, $arguments) |
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{ |
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// Check if the method exists in the object under which the element was created. |
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$methodClass = $this->findMethodClass($name); |
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if ($methodClass !== null) { |
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return call_user_func_array([$methodClass, $name], $arguments); |
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} |
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if (str_starts_with($name, "open_")) { |
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// Allow for magic methods that open containers. |
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$containerCheck = true; |
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$name = substr($name, 5); |
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} else if (str_starts_with($name, "close_")) { |
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// Allow for magic methods that close containers. |
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return $this->popContainer(substr($name, 6)); |
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} else { |
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$containerCheck = false; |
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} |
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// Create an instance of the element we need |
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$elementClass = new \ReflectionClass(__NAMESPACE__ . "\\" . Text::ucamelize($name)); |
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$element = $elementClass->newInstanceArgs($arguments == null ? array() : $arguments); |
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$element->setTemplateRenderer($this->templateRenderer); |
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$element->setCaller($this); |
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// |
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if ($containerCheck && is_a($element, __NAMESPACE__ . "\\Container")) { |
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$this->pushContainer($name, $element); |
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} else if ($containerCheck) { |
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throw new HonamException("Element $name is not a container. Use the open_ prefix only when creating a container."); |
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} else if (!$containerCheck) { |
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$this->getActiveContainer()->add($element); |
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} |
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return $element; |
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} |
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public function setCaller($caller) |
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{ |
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$this->caller = $caller; |
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} |
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} |
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ntentan /
honam
Loading history...
Let?s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let?s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: