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<?php
namespace App\Message;
use Exception;
/**
* Handles messages and context
*
* @author Phil Burton <phil@pgburton.com>
*/
class Handler
{
/**
* The important set of injects for this handler
*
* @var string[]
*/
protected $important = [];
/**
* Construct our handler
*
* @author Phil Burton <phil@pgburton.com>
* @param string[] $important
*/
public function __construct($important)
{
$this->important = $important;
$this->initImportantValues();
}
/**
* Set important values
*
* @author Phil Burton <phil@pgburton.com>
* @param mixed[] $array
*/
protected function initImportantValues()
{
foreach ($this->important as $name) {
$this->addImportantValue($name, false);
}
}
/**
* Add an important value to our array
*
* @author Phil Burton <phil@pgburton.com>
* @param string $name
* @param mixed[] $value
*/
protected function addImportantValue($name, $value)
{
if (in_array($name, $this->important)) {
$this->$name = $value;
}
return $name;
}
/**
* Get a single important value
*
* @author Phil Burton <phil@pgburton.com>
* @param string $name
* @return mixed
*/
public function returnImportant($name)
{
if (!isset($this->$name)) {
throw new Exception('The var ' . $name . ' is not set in this context');
}
return $this->$name;
}
protected function addImportantFromArray($array)
{
foreach ($array as $key => $value) {
if (!isset($this->$key)) {
throw new Exception('The var ' . $value . ' is not set in this context');
}
$this->$key = $value;
}
}
/**
* Return all importnat vars and values in array
*
* @author Phil Burton <phil@pgburton.com>
* @return string[]
*/
public function returnImportants()
{
return $this->important;
}
/**
* Magic __get override to be able to get important values using ->myValue
* which then runs $this->returnImportant('myValue')
*
* @author Phil Burton <phil@pgburton.com>
* @param string $name
* @param mixed[] $arguments
* @return string
*/
public function __get($name)
{
return $this->returnImporant(substr($name, 3));
}
/**
* Allow for magic rendering
* Call renderFooBar to render the FooBar message class
*
* @author Phil Burton <phil@pgburton.com>
* @param string $name
* @param mixed[] $arguments
* @return string
*/
public function __call($name, $arguments)
{
if (strpos($name, 'render') === 0) {
return $this->doRender(substr($name, 6));
}
}
/**
* Render the opening message
*
* @author Phil Burton <phil@pgburton.com>
* @return string
*/
public function doRender($name)
{
$name = "App\\Message\\" . $name;
if (!class_exists($name)) {
throw new Exception('Could not find message class `' . $name . '`');
}
$messageObj = new $name($this);
$message = $messageObj->renderMessage();
$this->addImportantFromArray($messageObj->getImportantValues());
return $message;
}
}
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