227 lines
9.5 KiB
PHP
227 lines
9.5 KiB
PHP
<?php
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declare (strict_types=1);
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namespace WpifyWooDeps\PhpDocReader;
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use WpifyWooDeps\PhpDocReader\PhpParser\UseStatementParser;
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use ReflectionClass;
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use ReflectionMethod;
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use ReflectionParameter;
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use ReflectionProperty;
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use Reflector;
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/**
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* PhpDoc reader
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*/
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class PhpDocReader
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{
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/** @var UseStatementParser */
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private $parser;
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private const PRIMITIVE_TYPES = ['bool' => 'bool', 'boolean' => 'bool', 'string' => 'string', 'int' => 'int', 'integer' => 'int', 'float' => 'float', 'double' => 'float', 'array' => 'array', 'object' => 'object', 'callable' => 'callable', 'resource' => 'resource', 'mixed' => 'mixed', 'iterable' => 'iterable'];
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/** @var bool */
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private $ignorePhpDocErrors;
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/**
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* @param bool $ignorePhpDocErrors Enable or disable throwing errors when PhpDoc errors occur (when parsing annotations).
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*/
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public function __construct(bool $ignorePhpDocErrors = \false)
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{
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$this->parser = new UseStatementParser();
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$this->ignorePhpDocErrors = $ignorePhpDocErrors;
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}
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/**
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* Parse the docblock of the property to get the type (class or primitive type) of the var annotation.
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*
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* @return string|null Type of the property (content of var annotation)
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* @throws AnnotationException
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*/
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public function getPropertyType(ReflectionProperty $property): ?string
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{
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return $this->readPropertyType($property, \true);
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}
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/**
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* Parse the docblock of the property to get the class of the var annotation.
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*
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* @return string|null Type of the property (content of var annotation)
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* @throws AnnotationException
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*/
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public function getPropertyClass(ReflectionProperty $property): ?string
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{
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return $this->readPropertyType($property, \false);
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}
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private function readPropertyType(ReflectionProperty $property, bool $allowPrimitiveTypes): ?string
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{
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// Get the content of the @var annotation
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$docComment = $property->getDocComment();
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if (!$docComment) {
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return null;
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}
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if (preg_match('/@var\s+([^\s]+)/', $docComment, $matches)) {
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[, $type] = $matches;
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} else {
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return null;
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}
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// Ignore primitive types
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if (isset(self::PRIMITIVE_TYPES[$type])) {
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if ($allowPrimitiveTypes) {
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return self::PRIMITIVE_TYPES[$type];
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}
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return null;
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}
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// Ignore types containing special characters ([], <> ...)
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if (!preg_match('/^[a-zA-Z0-9\\\\_]+$/', $type)) {
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return null;
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}
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$class = $property->getDeclaringClass();
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// If the class name is not fully qualified (i.e. doesn't start with a \)
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if ($type[0] !== '\\') {
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// Try to resolve the FQN using the class context
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$resolvedType = $this->tryResolveFqn($type, $class, $property);
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if (!$resolvedType && !$this->ignorePhpDocErrors) {
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throw new AnnotationException(sprintf('The @var annotation on %s::%s contains a non existent class "%s". ' . 'Did you maybe forget to add a "use" statement for this annotation?', $class->name, $property->getName(), $type));
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}
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$type = $resolvedType;
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}
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if (!$this->ignorePhpDocErrors && !$this->classExists($type)) {
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throw new AnnotationException(sprintf('The @var annotation on %s::%s contains a non existent class "%s"', $class->name, $property->getName(), $type));
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}
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// Remove the leading \ (FQN shouldn't contain it)
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$type = is_string($type) ? ltrim($type, '\\') : null;
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return $type;
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}
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/**
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* Parse the docblock of the property to get the type (class or primitive type) of the param annotation.
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*
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* @return string|null Type of the property (content of var annotation)
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* @throws AnnotationException
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*/
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public function getParameterType(ReflectionParameter $parameter): ?string
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{
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return $this->readParameterClass($parameter, \true);
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}
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/**
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* Parse the docblock of the property to get the class of the param annotation.
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*
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* @return string|null Type of the property (content of var annotation)
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* @throws AnnotationException
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*/
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public function getParameterClass(ReflectionParameter $parameter): ?string
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{
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return $this->readParameterClass($parameter, \false);
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}
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private function readParameterClass(ReflectionParameter $parameter, bool $allowPrimitiveTypes): ?string
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{
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// Use reflection
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$parameterType = $parameter->getType();
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if ($parameterType && $parameterType instanceof \ReflectionNamedType && !$parameterType->isBuiltin()) {
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return $parameterType->getName();
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}
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$parameterName = $parameter->name;
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// Get the content of the @param annotation
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$method = $parameter->getDeclaringFunction();
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$docComment = $method->getDocComment();
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if (!$docComment) {
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return null;
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}
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if (preg_match('/@param\s+([^\s]+)\s+\$' . $parameterName . '/', $docComment, $matches)) {
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[, $type] = $matches;
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} else {
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return null;
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}
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// Ignore primitive types
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if (isset(self::PRIMITIVE_TYPES[$type])) {
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if ($allowPrimitiveTypes) {
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return self::PRIMITIVE_TYPES[$type];
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}
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return null;
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}
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// Ignore types containing special characters ([], <> ...)
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if (!preg_match('/^[a-zA-Z0-9\\\\_]+$/', $type)) {
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return null;
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}
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$class = $parameter->getDeclaringClass();
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// If the class name is not fully qualified (i.e. doesn't start with a \)
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if ($type[0] !== '\\') {
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// Try to resolve the FQN using the class context
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$resolvedType = $this->tryResolveFqn($type, $class, $parameter);
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if (!$resolvedType && !$this->ignorePhpDocErrors) {
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throw new AnnotationException(sprintf('The @param annotation for parameter "%s" of %s::%s contains a non existent class "%s". ' . 'Did you maybe forget to add a "use" statement for this annotation?', $parameterName, $class->name, $method->name, $type));
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}
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$type = $resolvedType;
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}
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if (!$this->ignorePhpDocErrors && !$this->classExists($type)) {
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throw new AnnotationException(sprintf('The @param annotation for parameter "%s" of %s::%s contains a non existent class "%s"', $parameterName, $class->name, $method->name, $type));
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}
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// Remove the leading \ (FQN shouldn't contain it)
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$type = is_string($type) ? ltrim($type, '\\') : null;
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return $type;
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}
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/**
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* Attempts to resolve the FQN of the provided $type based on the $class and $member context.
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*
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* @return string|null Fully qualified name of the type, or null if it could not be resolved
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*/
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private function tryResolveFqn(string $type, ReflectionClass $class, Reflector $member): ?string
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{
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$alias = (($pos = strpos($type, '\\')) === \false) ? $type : substr($type, 0, $pos);
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$loweredAlias = strtolower($alias);
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// Retrieve "use" statements
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$uses = $this->parser->parseUseStatements($class);
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if (isset($uses[$loweredAlias])) {
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// Imported classes
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if ($pos !== \false) {
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return $uses[$loweredAlias] . substr($type, $pos);
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}
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return $uses[$loweredAlias];
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}
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if ($this->classExists($class->getNamespaceName() . '\\' . $type)) {
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return $class->getNamespaceName() . '\\' . $type;
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}
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if (isset($uses['__NAMESPACE__']) && $this->classExists($uses['__NAMESPACE__'] . '\\' . $type)) {
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// Class namespace
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return $uses['__NAMESPACE__'] . '\\' . $type;
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}
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if ($this->classExists($type)) {
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// No namespace
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return $type;
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}
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// If all fail, try resolving through related traits
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return $this->tryResolveFqnInTraits($type, $class, $member);
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}
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/**
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* Attempts to resolve the FQN of the provided $type based on the $class and $member context, specifically searching
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* through the traits that are used by the provided $class.
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*
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* @return string|null Fully qualified name of the type, or null if it could not be resolved
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*/
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private function tryResolveFqnInTraits(string $type, ReflectionClass $class, Reflector $member): ?string
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{
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/** @var ReflectionClass[] $traits */
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$traits = [];
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// Get traits for the class and its parents
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while ($class) {
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$traits = array_merge($traits, $class->getTraits());
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$class = $class->getParentClass();
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}
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foreach ($traits as $trait) {
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// Eliminate traits that don't have the property/method/parameter
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if ($member instanceof ReflectionProperty && !$trait->hasProperty($member->name)) {
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continue;
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}
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if ($member instanceof ReflectionMethod && !$trait->hasMethod($member->name)) {
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continue;
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}
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if ($member instanceof ReflectionParameter && !$trait->hasMethod($member->getDeclaringFunction()->name)) {
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continue;
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}
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// Run the resolver again with the ReflectionClass instance for the trait
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$resolvedType = $this->tryResolveFqn($type, $trait, $member);
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if ($resolvedType) {
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return $resolvedType;
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}
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}
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return null;
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}
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private function classExists(string $class): bool
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{
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return class_exists($class) || interface_exists($class);
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}
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}
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