Add StoreMigrateCommand from integration repos to ease maintainance

src/Console/Command/StoreMigrateCommand.php

@@ -0,0 +1,88 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Patchlevel\EventSourcing\Console\Command;
+
+use Patchlevel\EventSourcing\Console\InputHelper;
+use Patchlevel\EventSourcing\Console\OutputStyle;
+use Patchlevel\EventSourcing\Message\Pipe;
+use Patchlevel\EventSourcing\Message\Translator\Translator;
+use Patchlevel\EventSourcing\Store\Store;
+use Symfony\Component\Console\Attribute\AsCommand;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+
+use function count;
+
+#[AsCommand(
+    'event-sourcing:store:migrate',
+    'migrate events from one store to another',
+)]
+final class StoreMigrateCommand extends Command
+{
+    /** @param iterable<int, Translator> $translators */
+    public function __construct(
+        private readonly Store $store,
+        private readonly Store $newStore,
+        private readonly iterable $translators = [],
+    ) {
+        parent::__construct();
+    }
+
+    protected function configure(): void
+    {
+        $this
+            ->addOption(
+                'buffer',
+                null,
+                InputOption::VALUE_REQUIRED,
+                'How many messages should be buffered',
+                1_000,
+            );
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output): int
+    {
+        $buffer = InputHelper::positiveIntOrZero($input->getOption('buffer'));
+        $style = new OutputStyle($input, $output);
+
+        $style->info('Migration initialization...');
+
+        $count = $this->store->count();
+        $messages = $this->store->load();
+
+        $style->progressStart($count);
+
+        $bufferedMessages = [];
+
+        $pipe = new Pipe(
+            $messages,
+            ...$this->translators,
+        );
+
+        foreach ($pipe as $message) {
+            $bufferedMessages[] = $message;
+
+            if (count($bufferedMessages) < $buffer) {
+                continue;
+            }
+
+            $this->newStore->save(...$bufferedMessages);
+            $bufferedMessages = [];
+            $style->progressAdvance($buffer);
+        }
+
+        if (count($bufferedMessages) !== 0) {
+            $this->newStore->save(...$bufferedMessages);
+            $style->progressAdvance(count($bufferedMessages));
+        }
+
+        $style->progressFinish();
+        $style->success('Migration finished');
+
+        return 0;
+    }
+}