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<?php
/*
* This file is part of Psy Shell.
*
* (c) 2012-2022 Justin Hileman
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Psy\Command;
use Psy\Formatter\DocblockFormatter;
use Psy\Formatter\SignatureFormatter;
use Psy\Input\CodeArgument;
use Psy\Output\ShellOutput;
use Psy\Reflection\ReflectionClassConstant;
use Psy\Reflection\ReflectionConstant_;
use Psy\Reflection\ReflectionLanguageConstruct;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
/**
* Read the documentation for an object, class, constant, method or property.
*/
class DocCommand extends ReflectingCommand
{
const INHERIT_DOC_TAG = '{@inheritdoc}';
/**
* {@inheritdoc}
*/
protected function configure()
{
$this
->setName('doc')
->setAliases(['rtfm', 'man'])
->setDefinition([
new InputOption('all', 'a', InputOption::VALUE_NONE, 'Show documentation for superclasses as well as the current class.'),
new CodeArgument('target', CodeArgument::REQUIRED, 'Function, class, instance, constant, method or property to document.'),
])
->setDescription('Read the documentation for an object, class, constant, method or property.')
->setHelp(
<<<HELP
Read the documentation for an object, class, constant, method or property.
It's awesome for well-documented code, not quite as awesome for poorly documented code.
e.g.
<return>>>> doc preg_replace</return>
<return>>>> doc Psy\Shell</return>
<return>>>> doc Psy\Shell::debug</return>
<return>>>> \$s = new Psy\Shell</return>
<return>>>> doc \$s->run</return>
HELP
);
}
/**
* {@inheritdoc}
*
* @return int 0 if everything went fine, or an exit code
*/
protected function execute(InputInterface $input, OutputInterface $output)
{
$value = $input->getArgument('target');
if (ReflectionLanguageConstruct::isLanguageConstruct($value)) {
$reflector = new ReflectionLanguageConstruct($value);
$doc = $this->getManualDocById($value);
} else {
list($target, $reflector) = $this->getTargetAndReflector($value);
$doc = $this->getManualDoc($reflector) ?: DocblockFormatter::format($reflector);
}
$db = $this->getApplication()->getManualDb();
if ($output instanceof ShellOutput) {
$output->startPaging();
}
// Maybe include the declaring class
if ($reflector instanceof \ReflectionMethod || $reflector instanceof \ReflectionProperty) {
$output->writeln(SignatureFormatter::format($reflector->getDeclaringClass()));
}
$output->writeln(SignatureFormatter::format($reflector));
$output->writeln('');
if (empty($doc) && !$db) {
$output->writeln('<warning>PHP manual not found</warning>');
$output->writeln(' To document core PHP functionality, download the PHP reference manual:');
$output->writeln(' https://github.com/bobthecow/psysh/wiki/PHP-manual');
} else {
$output->writeln($doc);
}
// Implicit --all if the original docblock has an {@inheritdoc} tag.
if ($input->getOption('all') || \stripos($doc, self::INHERIT_DOC_TAG) !== false) {
$parent = $reflector;
foreach ($this->getParentReflectors($reflector) as $parent) {
$output->writeln('');
$output->writeln('---');
$output->writeln('');
// Maybe include the declaring class
if ($parent instanceof \ReflectionMethod || $parent instanceof \ReflectionProperty) {
$output->writeln(SignatureFormatter::format($parent->getDeclaringClass()));
}
$output->writeln(SignatureFormatter::format($parent));
$output->writeln('');
if ($doc = $this->getManualDoc($parent) ?: DocblockFormatter::format($parent)) {
$output->writeln($doc);
}
}
}
if ($output instanceof ShellOutput) {
$output->stopPaging();
}
// Set some magic local variables
$this->setCommandScopeVariables($reflector);
return 0;
}
private function getManualDoc($reflector)
{
switch (\get_class($reflector)) {
case \ReflectionClass::class:
case \ReflectionObject::class:
case \ReflectionFunction::class:
$id = $reflector->name;
break;
case \ReflectionMethod::class:
$id = $reflector->class.'::'.$reflector->name;
break;
case \ReflectionProperty::class:
$id = $reflector->class.'::$'.$reflector->name;
break;
case \ReflectionClassConstant::class:
case ReflectionClassConstant::class:
// @todo this is going to collide with ReflectionMethod ids
// someday... start running the query by id + type if the DB
// supports it.
$id = $reflector->class.'::'.$reflector->name;
break;
case ReflectionConstant_::class:
$id = $reflector->name;
break;
default:
return false;
}
return $this->getManualDocById($id);
}
/**
* Get all all parent Reflectors for a given Reflector.
*
* For example, passing a Class, Object or TraitReflector will yield all
* traits and parent classes. Passing a Method or PropertyReflector will
* yield Reflectors for the same-named method or property on all traits and
* parent classes.
*
* @return \Generator a whole bunch of \Reflector instances
*/
private function getParentReflectors($reflector): \Generator
{
$seenClasses = [];
switch (\get_class($reflector)) {
case \ReflectionClass::class:
case \ReflectionObject::class:
foreach ($reflector->getTraits() as $trait) {
if (!\in_array($trait->getName(), $seenClasses)) {
$seenClasses[] = $trait->getName();
yield $trait;
}
}
foreach ($reflector->getInterfaces() as $interface) {
if (!\in_array($interface->getName(), $seenClasses)) {
$seenClasses[] = $interface->getName();
yield $interface;
}
}
while ($reflector = $reflector->getParentClass()) {
yield $reflector;
foreach ($reflector->getTraits() as $trait) {
if (!\in_array($trait->getName(), $seenClasses)) {
$seenClasses[] = $trait->getName();
yield $trait;
}
}
foreach ($reflector->getInterfaces() as $interface) {
if (!\in_array($interface->getName(), $seenClasses)) {
$seenClasses[] = $interface->getName();
yield $interface;
}
}
}
return;
case \ReflectionMethod::class:
foreach ($this->getParentReflectors($reflector->getDeclaringClass()) as $parent) {
if ($parent->hasMethod($reflector->getName())) {
$parentMethod = $parent->getMethod($reflector->getName());
if (!\in_array($parentMethod->getDeclaringClass()->getName(), $seenClasses)) {
$seenClasses[] = $parentMethod->getDeclaringClass()->getName();
yield $parentMethod;
}
}
}
return;
case \ReflectionProperty::class:
foreach ($this->getParentReflectors($reflector->getDeclaringClass()) as $parent) {
if ($parent->hasProperty($reflector->getName())) {
$parentProperty = $parent->getProperty($reflector->getName());
if (!\in_array($parentProperty->getDeclaringClass()->getName(), $seenClasses)) {
$seenClasses[] = $parentProperty->getDeclaringClass()->getName();
yield $parentProperty;
}
}
}
break;
}
}
private function getManualDocById($id)
{
if ($db = $this->getApplication()->getManualDb()) {
$result = $db->query(\sprintf('SELECT doc FROM php_manual WHERE id = %s', $db->quote($id)));
if ($result !== false) {
return $result->fetchColumn(0);
}
}
}
}
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