[PSR-4] Add "find-multi-classes" command to check files with multiple…

… classes (#15)

src/Command/FindMultiClassesCommand.php

@@ -0,0 +1,56 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Symplify\EasyCI\Command;
+
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use Symplify\EasyCI\Finder\MultipleClassInOneFileFinder;
+
+final class FindMultiClassesCommand extends Command
+{
+    public function __construct(
+        private readonly MultipleClassInOneFileFinder $multipleClassInOneFileFinder,
+        private readonly SymfonyStyle $symfonyStyle,
+    ) {
+        parent::__construct();
+    }
+
+    protected function configure(): void
+    {
+        $this->setName('find-multi-classes');
+
+        $this->setDescription('Find multiple classes in one file');
+
+        $this->addArgument(
+            'sources',
+            InputArgument::REQUIRED | InputArgument::IS_ARRAY,
+            'Path to source to analyse'
+        );
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output): int
+    {
+        /** @var string[] $source */
+        $source = $input->getArgument('sources');
+
+        $multipleClassesByFile = $this->multipleClassInOneFileFinder->findInDirectories($source);
+        if ($multipleClassesByFile === []) {
+            $this->symfonyStyle->success('No files with 2+ classes found');
+
+            return self::SUCCESS;
+        }
+
+        foreach ($multipleClassesByFile as $file => $classes) {
+            $message = sprintf('File "%s" has %d classes', $file, count($classes));
+            $this->symfonyStyle->section($message);
+            $this->symfonyStyle->listing($classes);
+        }
+
+        return self::FAILURE;
+    }
+}

src/DependencyInjection/ContainerFactory.php

@@ -11,6 +11,7 @@
 use Symfony\Component\Console\Style\SymfonyStyle;
 use Symplify\EasyCI\Command\CheckCommentedCodeCommand;
 use Symplify\EasyCI\Command\CheckConflictsCommand;
+use Symplify\EasyCI\Command\FindMultiClassesCommand;
 use Symplify\EasyCI\Command\ValidateFileLengthCommand;
 use Symplify\EasyCI\Testing\Command\DetectUnitTestsCommand;
 
@@ -37,7 +38,9 @@ public function create(): Container
                 $container->make(CheckConflictsCommand::class),
                 $container->make(ValidateFileLengthCommand::class),
                 $container->make(DetectUnitTestsCommand::class),
+                $container->make(FindMultiClassesCommand::class),
             ];
+
             $application->addCommands($commands);
 
             // remove basic command to make output clear

src/Finder/MultipleClassInOneFileFinder.php

@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Symplify\EasyCI\Finder;
+
+use Symplify\EasyCI\RobotLoader\PhpClassLoader;
+
+final readonly class MultipleClassInOneFileFinder
+{
+    public function __construct(
+        private PhpClassLoader $phpClassLoader
+    ) {
+    }
+
+    /**
+     * @param string[] $directories
+     * @return string[][]
+     */
+    public function findInDirectories(array $directories): array
+    {
+        $fileByClasses = $this->phpClassLoader->load($directories);
+
+        $classesByFile = [];
+        foreach ($fileByClasses as $class => $file) {
+            $classesByFile[$file][] = $class;
+        }
+
+        return array_filter($classesByFile, static fn(array $classes): bool => count($classes) >= 2);
+    }
+}

src/RobotLoader/PhpClassLoader.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace Symplify\EasyCI\RobotLoader;
+
+use Nette\Loaders\RobotLoader;
+
+final class PhpClassLoader
+{
+    /**
+     * @param string[] $directories
+     * @return array<string, string>
+     */
+    public function load(array $directories): array
+    {
+        $robotLoader = new RobotLoader();
+        $robotLoader->addDirectory(...$directories);
+        $robotLoader->setTempDirectory(sys_get_temp_dir() . '/multiple-classes');
+        $robotLoader->rebuild();
+
+        return $robotLoader->getIndexedClasses();
+    }
+}