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<?php declare(strict_types=1);
/*
* This file is part of sebastian/code-unit-reverse-lookup.
*
* (c) Sebastian Bergmann <sebastian@phpunit.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace SebastianBergmann\CodeUnitReverseLookup;
use function array_merge;
use function assert;
use function class_exists;
use function function_exists;
use function get_declared_classes;
use function get_declared_traits;
use function get_defined_functions;
use function is_array;
use function is_int;
use function is_string;
use function range;
use function trait_exists;
use ReflectionClass;
use ReflectionFunction;
use ReflectionMethod;
final class Wizard
{
/**
* @var array<string, array<int, string>>
*/
private array $lookupTable = [];
/**
* @var array<class-string, true>
*/
private array $processedClasses = [];
/**
* @var array<string, true>
*/
private array $processedFunctions = [];
public function lookup(string $filename, int $lineNumber): string
{
if (!isset($this->lookupTable[$filename][$lineNumber])) {
$this->updateLookupTable();
}
if (isset($this->lookupTable[$filename][$lineNumber])) {
return $this->lookupTable[$filename][$lineNumber];
}
return $filename . ':' . $lineNumber;
}
private function updateLookupTable(): void
{
$this->processClassesAndTraits();
$this->processFunctions();
}
private function processClassesAndTraits(): void
{
$classes = get_declared_classes();
$traits = get_declared_traits();
assert(is_array($traits));
foreach (array_merge($classes, $traits) as $classOrTrait) {
assert(class_exists($classOrTrait) || trait_exists($classOrTrait));
if (isset($this->processedClasses[$classOrTrait])) {
continue;
}
foreach ((new ReflectionClass($classOrTrait))->getMethods() as $method) {
$this->processFunctionOrMethod($method);
}
$this->processedClasses[$classOrTrait] = true;
}
}
private function processFunctions(): void
{
foreach (get_defined_functions()['user'] as $function) {
assert(function_exists($function));
if (isset($this->processedFunctions[$function])) {
continue;
}
$this->processFunctionOrMethod(new ReflectionFunction($function));
$this->processedFunctions[$function] = true;
}
}
private function processFunctionOrMethod(ReflectionFunction|ReflectionMethod $functionOrMethod): void
{
if ($functionOrMethod->isInternal()) {
return;
}
$name = $functionOrMethod->getName();
if ($functionOrMethod instanceof ReflectionMethod) {
$name = $functionOrMethod->getDeclaringClass()->getName() . '::' . $name;
}
$fileName = $functionOrMethod->getFileName();
assert(is_string($fileName));
if (!isset($this->lookupTable[$fileName])) {
$this->lookupTable[$fileName] = [];
}
$startLine = $functionOrMethod->getStartLine();
$endLine = $functionOrMethod->getEndLine();
assert(is_int($startLine));
assert(is_int($endLine));
assert($endLine >= $startLine);
foreach (range($startLine, $endLine) as $line) {
$this->lookupTable[$fileName][$line] = $name;
}
}
}
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