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<?php declare(strict_types=1);
/*
* This file is part of phpunit/php-code-coverage.
*
* (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\CodeCoverage\StaticAnalysis;
use function implode;
use function str_replace;
use function trim;
use PhpParser\Node;
use PhpParser\Node\Identifier;
use PhpParser\Node\Name;
use PhpParser\Node\NullableType;
use PhpParser\Node\Stmt\Class_;
use PhpParser\Node\Stmt\ClassMethod;
use PhpParser\Node\Stmt\Function_;
use PhpParser\Node\Stmt\Interface_;
use PhpParser\Node\Stmt\Trait_;
use PhpParser\Node\UnionType;
use PhpParser\NodeTraverser;
use PhpParser\NodeVisitorAbstract;
use SebastianBergmann\Complexity\CyclomaticComplexityCalculatingVisitor;
final class CodeUnitFindingVisitor extends NodeVisitorAbstract
{
/**
* @var array
*/
private $classes = [];
/**
* @var array
*/
private $traits = [];
/**
* @var array
*/
private $functions = [];
public function enterNode(Node $node)
{
if ($node instanceof Class_) {
if ($node->isAnonymous()) {
return;
}
$this->processClass($node);
}
if ($node instanceof Trait_) {
$this->processTrait($node);
}
if (!$node instanceof ClassMethod && !$node instanceof Function_) {
return null;
}
if ($node instanceof ClassMethod) {
$parentNode = $node->getAttribute('parent');
if ($parentNode instanceof Class_ && $parentNode->isAnonymous()) {
return;
}
$this->processMethod($node);
return;
}
$this->processFunction($node);
}
public function classes(): array
{
return $this->classes;
}
public function traits(): array
{
return $this->traits;
}
public function functions(): array
{
return $this->functions;
}
/**
* @psalm-param ClassMethod|Function_ $node
*/
private function cyclomaticComplexity(Node $node): int
{
assert($node instanceof ClassMethod || $node instanceof Function_);
$nodes = $node->getStmts();
if ($nodes === null) {
return 0;
}
$traverser = new NodeTraverser;
$cyclomaticComplexityCalculatingVisitor = new CyclomaticComplexityCalculatingVisitor;
$traverser->addVisitor($cyclomaticComplexityCalculatingVisitor);
/* @noinspection UnusedFunctionResultInspection */
$traverser->traverse($nodes);
return $cyclomaticComplexityCalculatingVisitor->cyclomaticComplexity();
}
/**
* @psalm-param ClassMethod|Function_ $node
*/
private function signature(Node $node): string
{
assert($node instanceof ClassMethod || $node instanceof Function_);
$signature = ($node->returnsByRef() ? '&' : '') . $node->name->toString() . '(';
$parameters = [];
foreach ($node->getParams() as $parameter) {
assert(isset($parameter->var->name));
$parameterAsString = '';
if ($parameter->type !== null) {
$parameterAsString = $this->type($parameter->type) . ' ';
}
$parameterAsString .= '$' . $parameter->var->name;
/* @todo Handle default values */
$parameters[] = $parameterAsString;
}
$signature .= implode(', ', $parameters) . ')';
$returnType = $node->getReturnType();
if ($returnType !== null) {
$signature .= ': ' . $this->type($returnType);
}
return $signature;
}
/**
* @psalm-param Identifier|Name|NullableType|UnionType $type
*/
private function type(Node $type): string
{
assert($type instanceof Identifier || $type instanceof Name || $type instanceof NullableType || $type instanceof UnionType);
if ($type instanceof NullableType) {
return '?' . $type->type;
}
if ($type instanceof UnionType) {
$types = [];
foreach ($type->types as $_type) {
$types[] = $_type->toString();
}
return implode('|', $types);
}
return $type->toString();
}
private function visibility(ClassMethod $node): string
{
if ($node->isPrivate()) {
return 'private';
}
if ($node->isProtected()) {
return 'protected';
}
return 'public';
}
private function processClass(Class_ $node): void
{
$name = $node->name->toString();
$namespacedName = $node->namespacedName->toString();
$this->classes[$namespacedName] = [
'name' => $name,
'namespacedName' => $namespacedName,
'namespace' => $this->namespace($namespacedName, $name),
'startLine' => $node->getStartLine(),
'endLine' => $node->getEndLine(),
'methods' => [],
];
}
private function processTrait(Trait_ $node): void
{
$name = $node->name->toString();
$namespacedName = $node->namespacedName->toString();
$this->traits[$namespacedName] = [
'name' => $name,
'namespacedName' => $namespacedName,
'namespace' => $this->namespace($namespacedName, $name),
'startLine' => $node->getStartLine(),
'endLine' => $node->getEndLine(),
'methods' => [],
];
}
private function processMethod(ClassMethod $node): void
{
$parentNode = $node->getAttribute('parent');
if ($parentNode instanceof Interface_) {
return;
}
assert($parentNode instanceof Class_ || $parentNode instanceof Trait_);
assert(isset($parentNode->name));
assert(isset($parentNode->namespacedName));
assert($parentNode->namespacedName instanceof Name);
$parentName = $parentNode->name->toString();
$parentNamespacedName = $parentNode->namespacedName->toString();
if ($parentNode instanceof Class_) {
$storage = &$this->classes;
} else {
$storage = &$this->traits;
}
if (!isset($storage[$parentNamespacedName])) {
$storage[$parentNamespacedName] = [
'name' => $parentName,
'namespacedName' => $parentNamespacedName,
'namespace' => $this->namespace($parentNamespacedName, $parentName),
'startLine' => $parentNode->getStartLine(),
'endLine' => $parentNode->getEndLine(),
'methods' => [],
];
}
$storage[$parentNamespacedName]['methods'][$node->name->toString()] = [
'methodName' => $node->name->toString(),
'signature' => $this->signature($node),
'visibility' => $this->visibility($node),
'startLine' => $node->getStartLine(),
'endLine' => $node->getEndLine(),
'ccn' => $this->cyclomaticComplexity($node),
];
}
private function processFunction(Function_ $node): void
{
assert(isset($node->name));
assert(isset($node->namespacedName));
assert($node->namespacedName instanceof Name);
$name = $node->name->toString();
$namespacedName = $node->namespacedName->toString();
$this->functions[$namespacedName] = [
'name' => $name,
'namespacedName' => $namespacedName,
'namespace' => $this->namespace($namespacedName, $name),
'signature' => $this->signature($node),
'startLine' => $node->getStartLine(),
'endLine' => $node->getEndLine(),
'ccn' => $this->cyclomaticComplexity($node),
];
}
private function namespace(string $namespacedName, string $name): string
{
return trim(
str_replace(
$name,
'',
$namespacedName
),
'\\'
);
}
}