Create abstract base class for commands deleting visits

module/CLI/src/Command/Visit/AbstractDeleteVisitsCommand.php

@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\CLI\Command\Visit;
+
+use Shlinkio\Shlink\CLI\Util\ExitCode;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+
+abstract class AbstractDeleteVisitsCommand extends Command
+{
+    final protected function execute(InputInterface $input, OutputInterface $output): ?int
+    {
+        $io = new SymfonyStyle($input, $output);
+        if (! $this->confirm($io)) {
+            $io->info('Operation aborted');
+            return ExitCode::EXIT_SUCCESS;
+        }
+
+        return $this->doExecute($input, $io);
+    }
+
+    private function confirm(SymfonyStyle $io): bool
+    {
+        $io->warning($this->getWarningMessage());
+        return $io->confirm('<comment>Continue deleting visits?</comment>', false);
+    }
+
+    abstract protected function doExecute(InputInterface $input, SymfonyStyle $io): ?int;
+
+    abstract protected function getWarningMessage(): string;
+}