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efrain |
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<?php
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declare(strict_types=1);
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namespace Phpml;
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use Phpml\Exception\FileException;
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use Phpml\Exception\SerializeException;
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class ModelManager
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{
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public function saveToFile(Estimator $estimator, string $filepath): void
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{
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if (!is_writable(dirname($filepath))) {
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throw new FileException(sprintf('File "%s" cannot be saved.', basename($filepath)));
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}
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$serialized = serialize($estimator);
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if (!isset($serialized[0])) {
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throw new SerializeException(sprintf('Class "%s" cannot be serialized.', gettype($estimator)));
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}
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$result = file_put_contents($filepath, $serialized, LOCK_EX);
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if ($result === false) {
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throw new FileException(sprintf('File "%s" cannot be saved.', basename($filepath)));
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}
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}
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public function restoreFromFile(string $filepath): Estimator
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{
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if (!file_exists($filepath) || !is_readable($filepath)) {
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throw new FileException(sprintf('File "%s" cannot be opened.', basename($filepath)));
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}
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$object = unserialize((string) file_get_contents($filepath));
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if ($object === false || !$object instanceof Estimator) {
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throw new SerializeException(sprintf('"%s" cannot be unserialized.', basename($filepath)));
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}
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return $object;
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}
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}
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