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<?php
/**
* An exception thrown while trying to build or resolve a binding in the container.
*
* @package lucatume\DI52
*/
namespace lucatume\DI52;
use Exception;
use Psr\Container\ContainerExceptionInterface;
use ReflectionClass;
use Throwable;
/**
* Class ContainerException
*
* @package lucatume\DI52
*/
class ContainerException extends Exception implements ContainerExceptionInterface
{
/**
* Extracts a property from an object.
*
* @param object $object The object to extract the property from.
* @param string $property The property to extract.
*
* @return mixed The property value if found, `null` otherwise.
*/
private static function getPropertyValue($object, $property)
{
$reflectionClass = new ReflectionClass($object);
do {
if ($reflectionClass->hasProperty($property)) {
$traceProperty = $reflectionClass->getProperty($property);
$traceProperty->setAccessible(true);
return $traceProperty->getValue($object);
}
$reflectionClass = $reflectionClass->getParentClass();
} while ($reflectionClass instanceof ReflectionClass);
return null;
}
/**
* Sets a private or protected property on an object.
*
* @param object $object The object to set the property on.
* @param string $property The property to set.
* @param mixed $value The value to set.
*
* @return bool Whether the property was set or not.
*/
private static function setPropertyValue($object, $property, $value)
{
$reflectionClass = new ReflectionClass($object);
do {
if ($reflectionClass->hasProperty($property)) {
$traceProperty = $reflectionClass->getProperty($property);
$traceProperty->setAccessible(true);
$traceProperty->setValue($object, $value);
return true;
}
$reflectionClass = $reflectionClass->getParentClass();
} while ($reflectionClass instanceof ReflectionClass);
return false;
}
/**
* Formats an error message to provide a useful debug message.
*
* @param string|object $id The id of what is actually being built or the object that is being built.
* @param Exception|Throwable $thrown The original exception thrown while trying to make the target.
* @param array<string> $buildLine A set of consecutive items the resolver is currently trying to build.
*
* @return string The formatted make error message.
*/
private static function makeBuildLineErrorMessage($id, $thrown, array $buildLine)
{
$idString = is_string($id) ? $id : gettype($id);
if ($thrown instanceof NestedParseError) {
$last = $thrown->getType() . ' $' . $thrown->getName();
} else {
$last = array_pop($buildLine) ?: $idString;
}
$lastEntry = "Error while making {$last}: " . lcfirst(
rtrim(
str_replace('"', '', $thrown->getMessage()),
'.'
)
) . '.';
$frags = array_merge($buildLine, [$lastEntry]);
return implode("\n\t=> ", $frags);
}
/**
* Builds a container exception from a throwable.
*
* @param string|object $id The id of what is actually being built or the object that is being built.
* @param Exception|Throwable $thrown The throwable to build the exception from.
* @param int $maskThrowables The bitmask of throwable properties to mask.
* @param array<string> $buildLine A set of consecutive items the resolver is currently trying to build.
*
* @return ContainerException The built Container exception.
*/
public static function fromThrowable($id, $thrown, $maskThrowables, array $buildLine)
{
$message = ($maskThrowables & Container::EXCEPTION_MASK_MESSAGE) ?
self::makeBuildLineErrorMessage($id, $thrown, $buildLine)
: $thrown->getMessage();
$exceptionClass = $thrown instanceof self ?
get_class($thrown)
: self::class;
$built = new $exceptionClass($message, $thrown->getCode(), $thrown);
if (($maskThrowables & Container::EXCEPTION_MASK_FILE_LINE)
&& ($thrownFile = self::getPropertyValue($thrown, 'file'))
&& ($thrownLine = self::getPropertyValue($thrown, 'line'))
) {
self::setPropertyValue($built, 'file', $thrownFile);
self::setPropertyValue($built, 'line', $thrownLine);
}
return $built;
}
}
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