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<?php |
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/* |
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* This file is part of the webmozart/json package. |
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* |
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* (c) Bernhard Schussek <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Webmozart\Json\Migration\Versioner; |
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use stdClass; |
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/** |
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* Expects the version to be set in the "$schema" field of a JSON object. |
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* |
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* @since 1.3 |
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* |
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* @author Bernhard Schussek <[email protected]> |
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*/ |
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class SchemaFieldPatternVersioner implements JsonVersioner |
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{ |
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/** |
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* The default pattern used to extract the version of a schema ID. |
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*/ |
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const DEFAULT_PATTERN = '~(?<=/)\d+\.\d+(?=/)~'; |
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/** |
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* @var string |
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*/ |
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private $pattern; |
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public function __construct($pattern = self::DEFAULT_PATTERN) |
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{ |
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$this->pattern = $pattern; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function parseVersion(stdClass $jsonData) |
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{ |
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if (!isset($jsonData->{'$schema'})) { |
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throw new CannotParseVersionException('Cannot find "$schema" property in JSON object.'); |
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} |
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$schema = $jsonData->{'$schema'}; |
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if (!preg_match($this->pattern, $schema, $matches)) { |
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throw new CannotParseVersionException(sprintf( |
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'Cannot find version of schema "%s" (pattern: "%s")', |
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$schema, |
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$this->pattern |
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)); |
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} |
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return $matches[0]; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function updateVersion(stdClass $jsonData, $version) |
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{ |
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if (!isset($jsonData->{'$schema'})) { |
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throw new CannotUpdateVersionException('Cannot find "$schema" property in JSON object.'); |
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} |
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$previousSchema = $jsonData->{'$schema'}; |
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$newSchema = preg_replace($this->pattern, $version, $previousSchema, -1, $count); |
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if (1 !== $count) { |
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throw new CannotUpdateVersionException(sprintf( |
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'Cannot update version of schema "%s" (pattern: "%s"): %s', |
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$previousSchema, |
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$this->pattern, |
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$count < 1 ? 'Not found' : 'Found more than once' |
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)); |
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} |
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$jsonData->{'$schema'} = $newSchema; |
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} |
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} |
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