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ContextFactory.php
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ContextFactory.php
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<?php
declare(strict_types=1);
/**
* This file is part of phpDocumentor.
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*
* @link http://phpdoc.org
*/
namespace phpDocumentor\Reflection\Types;
use ArrayIterator;
use InvalidArgumentException;
use ReflectionClass;
use ReflectionClassConstant;
use ReflectionMethod;
use ReflectionParameter;
use ReflectionProperty;
use Reflector;
use RuntimeException;
use UnexpectedValueException;
use function define;
use function defined;
use function file_exists;
use function file_get_contents;
use function get_class;
use function in_array;
use function is_string;
use function strrpos;
use function substr;
use function token_get_all;
use function trim;
use const T_AS;
use const T_CLASS;
use const T_CURLY_OPEN;
use const T_DOLLAR_OPEN_CURLY_BRACES;
use const T_NAME_FULLY_QUALIFIED;
use const T_NAME_QUALIFIED;
use const T_NAMESPACE;
use const T_NS_SEPARATOR;
use const T_STRING;
use const T_TRAIT;
use const T_USE;
if (!defined('T_NAME_QUALIFIED')) {
define('T_NAME_QUALIFIED', 10001);
}
if (!defined('T_NAME_FULLY_QUALIFIED')) {
define('T_NAME_FULLY_QUALIFIED', 10002);
}
/**
* Convenience class to create a Context for DocBlocks when not using the Reflection Component of phpDocumentor.
*
* For a DocBlock to be able to resolve types that use partial namespace names or rely on namespace imports we need to
* provide a bit of context so that the DocBlock can read that and based on it decide how to resolve the types to
* Fully Qualified names.
*
* @see Context for more information.
*/
final class ContextFactory
{
/** The literal used at the end of a use statement. */
private const T_LITERAL_END_OF_USE = ';';
/** The literal used between sets of use statements */
private const T_LITERAL_USE_SEPARATOR = ',';
/**
* Build a Context given a Class Reflection.
*
* @see Context for more information on Contexts.
*/
public function createFromReflector(Reflector $reflector): Context
{
if ($reflector instanceof ReflectionClass) {
//phpcs:ignore SlevomatCodingStandard.Commenting.InlineDocCommentDeclaration.MissingVariable
/** @var ReflectionClass<object> $reflector */
return $this->createFromReflectionClass($reflector);
}
if ($reflector instanceof ReflectionParameter) {
return $this->createFromReflectionParameter($reflector);
}
if ($reflector instanceof ReflectionMethod) {
return $this->createFromReflectionMethod($reflector);
}
if ($reflector instanceof ReflectionProperty) {
return $this->createFromReflectionProperty($reflector);
}
if ($reflector instanceof ReflectionClassConstant) {
return $this->createFromReflectionClassConstant($reflector);
}
throw new UnexpectedValueException('Unhandled \Reflector instance given: ' . get_class($reflector));
}
private function createFromReflectionParameter(ReflectionParameter $parameter): Context
{
$class = $parameter->getDeclaringClass();
if (!$class) {
throw new InvalidArgumentException('Unable to get class of ' . $parameter->getName());
}
return $this->createFromReflectionClass($class);
}
private function createFromReflectionMethod(ReflectionMethod $method): Context
{
$class = $method->getDeclaringClass();
return $this->createFromReflectionClass($class);
}
private function createFromReflectionProperty(ReflectionProperty $property): Context
{
$class = $property->getDeclaringClass();
return $this->createFromReflectionClass($class);
}
private function createFromReflectionClassConstant(ReflectionClassConstant $constant): Context
{
//phpcs:ignore SlevomatCodingStandard.Commenting.InlineDocCommentDeclaration.MissingVariable
/** @phpstan-var ReflectionClass<object> $class */
$class = $constant->getDeclaringClass();
return $this->createFromReflectionClass($class);
}
/**
* @phpstan-param ReflectionClass<object> $class
*/
private function createFromReflectionClass(ReflectionClass $class): Context
{
$fileName = $class->getFileName();
$namespace = $class->getNamespaceName();
if (is_string($fileName) && file_exists($fileName)) {
$contents = file_get_contents($fileName);
if ($contents === false) {
throw new RuntimeException('Unable to read file "' . $fileName . '"');
}
return $this->createForNamespace($namespace, $contents);
}
return new Context($namespace, []);
}
/**
* Build a Context for a namespace in the provided file contents.
*
* @see Context for more information on Contexts.
*
* @param string $namespace It does not matter if a `\` precedes the namespace name,
* this method first normalizes.
* @param string $fileContents The file's contents to retrieve the aliases from with the given namespace.
*/
public function createForNamespace(string $namespace, string $fileContents): Context
{
$namespace = trim($namespace, '\\');
$useStatements = [];
$currentNamespace = '';
$tokens = new ArrayIterator(token_get_all($fileContents));
while ($tokens->valid()) {
$currentToken = $tokens->current();
switch ($currentToken[0]) {
case T_NAMESPACE:
$currentNamespace = $this->parseNamespace($tokens);
break;
case T_CLASS:
case T_TRAIT:
// Fast-forward the iterator through the class so that any
// T_USE tokens found within are skipped - these are not
// valid namespace use statements so should be ignored.
$braceLevel = 0;
$firstBraceFound = false;
while ($tokens->valid() && ($braceLevel > 0 || !$firstBraceFound)) {
$currentToken = $tokens->current();
if (
$currentToken === '{'
|| in_array($currentToken[0], [T_CURLY_OPEN, T_DOLLAR_OPEN_CURLY_BRACES], true)
) {
if (!$firstBraceFound) {
$firstBraceFound = true;
}
++$braceLevel;
}
if ($currentToken === '}') {
--$braceLevel;
}
$tokens->next();
}
break;
case T_USE:
if ($currentNamespace === $namespace) {
$useStatements += $this->parseUseStatement($tokens);
}
break;
}
$tokens->next();
}
return new Context($namespace, $useStatements);
}
/**
* Deduce the name from tokens when we are at the T_NAMESPACE token.
*
* @param ArrayIterator<int, string|array{0:int,1:string,2:int}> $tokens
*/
private function parseNamespace(ArrayIterator $tokens): string
{
// skip to the first string or namespace separator
$this->skipToNextStringOrNamespaceSeparator($tokens);
$name = '';
$acceptedTokens = [T_STRING, T_NS_SEPARATOR, T_NAME_QUALIFIED];
while ($tokens->valid() && in_array($tokens->current()[0], $acceptedTokens, true)) {
$name .= $tokens->current()[1];
$tokens->next();
}
return $name;
}
/**
* Deduce the names of all imports when we are at the T_USE token.
*
* @param ArrayIterator<int, string|array{0:int,1:string,2:int}> $tokens
*
* @return string[]
* @psalm-return array<string, string>
*/
private function parseUseStatement(ArrayIterator $tokens): array
{
$uses = [];
while ($tokens->valid()) {
$this->skipToNextStringOrNamespaceSeparator($tokens);
$uses += $this->extractUseStatements($tokens);
$currentToken = $tokens->current();
if ($currentToken[0] === self::T_LITERAL_END_OF_USE) {
return $uses;
}
}
return $uses;
}
/**
* Fast-forwards the iterator as longs as we don't encounter a T_STRING or T_NS_SEPARATOR token.
*
* @param ArrayIterator<int, string|array{0:int,1:string,2:int}> $tokens
*/
private function skipToNextStringOrNamespaceSeparator(ArrayIterator $tokens): void
{
while ($tokens->valid()) {
$currentToken = $tokens->current();
if (in_array($currentToken[0], [T_STRING, T_NS_SEPARATOR], true)) {
break;
}
if ($currentToken[0] === T_NAME_QUALIFIED) {
break;
}
if (defined('T_NAME_FULLY_QUALIFIED') && $currentToken[0] === T_NAME_FULLY_QUALIFIED) {
break;
}
$tokens->next();
}
}
/**
* Deduce the namespace name and alias of an import when we are at the T_USE token or have not reached the end of
* a USE statement yet. This will return a key/value array of the alias => namespace.
*
* @param ArrayIterator<int, string|array{0:int,1:string,2:int}> $tokens
*
* @return string[]
* @psalm-return array<string, string>
*
* @psalm-suppress TypeDoesNotContainType
*/
private function extractUseStatements(ArrayIterator $tokens): array
{
$extractedUseStatements = [];
$groupedNs = '';
$currentNs = '';
$currentAlias = '';
$state = 'start';
while ($tokens->valid()) {
$currentToken = $tokens->current();
$tokenId = is_string($currentToken) ? $currentToken : $currentToken[0];
$tokenValue = is_string($currentToken) ? null : $currentToken[1];
switch ($state) {
case 'start':
switch ($tokenId) {
case T_STRING:
case T_NS_SEPARATOR:
$currentNs .= (string) $tokenValue;
$currentAlias = $tokenValue;
break;
case T_NAME_QUALIFIED:
case T_NAME_FULLY_QUALIFIED:
$currentNs .= (string) $tokenValue;
$currentAlias = substr(
(string) $tokenValue,
(int) (strrpos((string) $tokenValue, '\\')) + 1
);
break;
case T_CURLY_OPEN:
case '{':
$state = 'grouped';
$groupedNs = $currentNs;
break;
case T_AS:
$state = 'start-alias';
break;
case self::T_LITERAL_USE_SEPARATOR:
case self::T_LITERAL_END_OF_USE:
$state = 'end';
break;
default:
break;
}
break;
case 'start-alias':
switch ($tokenId) {
case T_STRING:
$currentAlias = $tokenValue;
break;
case self::T_LITERAL_USE_SEPARATOR:
case self::T_LITERAL_END_OF_USE:
$state = 'end';
break;
default:
break;
}
break;
case 'grouped':
switch ($tokenId) {
case T_STRING:
case T_NS_SEPARATOR:
$currentNs .= (string) $tokenValue;
$currentAlias = $tokenValue;
break;
case T_AS:
$state = 'grouped-alias';
break;
case self::T_LITERAL_USE_SEPARATOR:
$state = 'grouped';
$extractedUseStatements[(string) $currentAlias] = $currentNs;
$currentNs = $groupedNs;
$currentAlias = '';
break;
case self::T_LITERAL_END_OF_USE:
$state = 'end';
break;
default:
break;
}
break;
case 'grouped-alias':
switch ($tokenId) {
case T_STRING:
$currentAlias = $tokenValue;
break;
case self::T_LITERAL_USE_SEPARATOR:
$state = 'grouped';
$extractedUseStatements[(string) $currentAlias] = $currentNs;
$currentNs = $groupedNs;
$currentAlias = '';
break;
case self::T_LITERAL_END_OF_USE:
$state = 'end';
break;
default:
break;
}
}
if ($state === 'end') {
break;
}
$tokens->next();
}
if ($groupedNs !== $currentNs) {
$extractedUseStatements[(string) $currentAlias] = $currentNs;
}
return $extractedUseStatements;
}
}

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text/x-php
Expires
Oct 4 2026, 01:43 (4 w, 3 d ago)
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ContextFactory.php (14 KB)

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