<?php
/*
* This file is part of Psy Shell.
*
* (c) 2012-2020 Justin Hileman
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Psy\CodeCleaner;
use PhpParser\Node;
use PhpParser\Node\Stmt\Class_;
use PhpParser\Node\Stmt\ClassMethod;
use Psy\Exception\FatalErrorException;
/**
* The abstract class pass handles abstract classes and methods, complaining if there are too few or too many of either.
*/
class AbstractClassPass extends CodeCleanerPass
{
private $class;
private $abstractMethods;
/**
* @throws FatalErrorException if the node is an abstract function with a body
*
* @param Node $node
*/
public function enterNode(Node $node)
{
if ($node instanceof Class_) {
$this->class = $node;
$this->abstractMethods = [];
} elseif ($node instanceof ClassMethod) {
if ($node->isAbstract()) {
$name = \sprintf('%s::%s', $this->class->name, $node->name);
$this->abstractMethods[] = $name;
if ($node->stmts !== null) {
$msg = \sprintf('Abstract function %s cannot contain body', $name);
throw new FatalErrorException($msg, 0, \E_ERROR, null, $node->getLine());
}
}
}
}
/**
* @throws FatalErrorException if the node is a non-abstract class with abstract methods
*
* @param Node $node
*/
public function leaveNode(Node $node)
{
if ($node instanceof Class_) {
$count = \count($this->abstractMethods);
if ($count > 0 && !$node->isAbstract()) {
$msg = \sprintf(
'Class %s contains %d abstract method%s must therefore be declared abstract or implement the remaining methods (%s)',
$node->name,
$count,
($count === 1) ? '' : 's',
\implode(', ', $this->abstractMethods)
);
throw new FatalErrorException($msg, 0, \E_ERROR, null, $node->getLine());
}
}
}
}