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<?php
namespace Amp;
/**
* A "safe" struct trait for public property aggregators.
*
* This trait is intended to make using public properties a little safer by throwing when
* nonexistent property names are read or written.
*/
trait Struct
{
/**
* The minimum percentage [0-100] at which to recommend a similar property
* name when generating error messages.
*/
private $__propertySuggestThreshold = 70;
/**
* @param string $property
*
* @psalm-return no-return
*/
public function __get(string $property)
{
throw new \Error(
$this->generateStructPropertyError($property)
);
}
/**
* @param string $property
* @param mixed $value
*
* @psalm-return no-return
*/
public function __set(string $property, $value)
{
throw new \Error(
$this->generateStructPropertyError($property)
);
}
private function generateStructPropertyError(string $property): string
{
$suggestion = $this->suggestPropertyName($property);
$suggestStr = ($suggestion == "") ? "" : " ... did you mean \"{$suggestion}?\"";
return \sprintf(
"%s property \"%s\" does not exist%s",
\str_replace("\0", "@", \get_class($this)), // Handle anonymous class names.
$property,
$suggestStr
);
}
private function suggestPropertyName(string $badProperty): string
{
$badProperty = \strtolower($badProperty);
$bestMatch = "";
$bestMatchPercentage = 0;
/** @psalm-suppress RawObjectIteration */
foreach ($this as $property => $value) {
// Never suggest properties that begin with an underscore
if ($property[0] === "_") {
continue;
}
\similar_text($badProperty, \strtolower($property), $byRefPercentage);
if ($byRefPercentage > $bestMatchPercentage) {
$bestMatchPercentage = $byRefPercentage;
$bestMatch = $property;
}
}
return ($bestMatchPercentage >= $this->__propertySuggestThreshold) ? $bestMatch : "";
}
}