Passed
Push — master ( d4b74b...f37c5f )
by Jesse
01:55
created

JsonTransform::fromKey()   A

Complexity

Conditions 1
Paths 1

Size

Total Lines 3
Code Lines 1

Duplication

Lines 0
Ratio 0 %

Importance

Changes 1
Bugs 0 Features 0
Metric Value
cc 1
eloc 1
nc 1
nop 2
dl 0
loc 3
rs 10
c 1
b 0
f 0
1
<?php declare(strict_types=1);
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namespace Stratadox\Hydration\Mapping\Transform;
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use Stratadox\Hydration\Mapping\AssertKey;
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use Stratadox\HydrationMapping\Mapping;
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use Stratadox\HydrationMapping\MappingFailure;
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use function is_array;
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use function json_decode;
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use function json_last_error;
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use function json_last_error_msg;
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use const JSON_ERROR_NONE;
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final class JsonTransform implements Mapping
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{
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    /** @var string */
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    private $key;
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    /** @var Mapping */
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    private $mapping;
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    private function __construct(string $key, Mapping $mapping)
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    {
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        $this->key = $key;
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        $this->mapping = $mapping;
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    }
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    public static function fromKey(string $key, Mapping $mapping): Mapping
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    {
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        return new self($key, $mapping);
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    }
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    public function name(): string
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    {
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        return $this->mapping->name();
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    }
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    public function value(array $data, $owner = null)
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    {
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        AssertKey::exists($this, $data, $this->key);
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        return $this->mapping->value($this->decode($data[$this->key]), $owner);
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    }
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    /** @throws MappingFailure */
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    private function decode(string $json): array
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    {
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        $value = json_decode($json, true);
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        if (is_array($value)) {
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            return $value;
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        }
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        if (json_last_error() !== JSON_ERROR_NONE) {
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            throw JsonTransformationFailure::detected(
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                json_last_error_msg(),
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                $this->key,
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                $this->name()
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            );
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        }
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        throw JsonTransformationFailure::cannotBeScalar(
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            $value,
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            $this->key,
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            $this->name()
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        );
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    }
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}
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