Added command to predictions

Author: mikoweb

.gitignore

@@ -4,6 +4,7 @@ composer.phar
 /resources/training.csv
 /resources/test.csv
 /resources/model.rbx
+/resources/predictions.csv
 
 ###> symfony/framework-bundle ###
 /.env.local

src/Domain/FileNames.php

@@ -9,4 +9,5 @@ final class FileNames
     public const string TRAINING_SET = 'training.csv';
     public const string TEST_SET = 'test.csv';
     public const string MODEL_FILENAME = 'model.rbx';
+    public const string PREDICTIONS_FILENAME = 'predictions.csv';
 }

src/UI/CLI/PredictCommand.php

@@ -0,0 +1,64 @@
+<?php
+
+namespace App\UI\CLI;
+
+use App\Application\Path\AppPathResolver;
+use App\Domain\FileNames;
+use League\Csv\CannotInsertRecord;
+use League\Csv\Exception;
+use League\Csv\UnavailableStream;
+use League\Csv\Writer;
+use Rubix\ML\Datasets\Labeled;
+use Rubix\ML\Extractors\CSV;
+use Rubix\ML\PersistentModel;
+use Rubix\ML\Persisters\Filesystem;
+use Symfony\Component\Console\Attribute\AsCommand;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+
+#[AsCommand(
+    name: 'app:predict',
+)]
+class PredictCommand extends Command
+{
+    public function __construct(
+        private readonly AppPathResolver $appPathResolver,
+    ) {
+        parent::__construct();
+    }
+
+    /**
+     * @throws UnavailableStream
+     * @throws CannotInsertRecord
+     * @throws Exception
+     */
+    protected function execute(InputInterface $input, OutputInterface $output): int
+    {
+        $io = new SymfonyStyle($input, $output);
+
+        $dataset = Labeled::fromIterator(new CSV(
+            $this->appPathResolver->getResourcesPath(FileNames::TEST_SET),
+            header: false,
+        ))->transformLabels(fn ($value) => (float) $value);
+
+        $model = PersistentModel::load(new Filesystem(
+            $this->appPathResolver->getResourcesPath(FileNames::MODEL_FILENAME),
+        ));
+
+        $writer = Writer::createFromPath($this->appPathResolver->getResourcesPath(
+            FileNames::PREDICTIONS_FILENAME,
+        ), 'w');
+
+        $predictions = $model->predict($dataset);
+
+        foreach ($predictions as $prediction) {
+            $writer->insertOne([$prediction]);
+        }
+
+        $io->success('Results saved to file');
+
+        return Command::SUCCESS;
+    }
+}