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<?php |
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namespace Pixie\JSON; |
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use Pixie\Exception; |
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use Pixie\Connection; |
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use Pixie\QueryBuilder\Raw; |
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use Pixie\QueryBuilder\TablePrefixer; |
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class JsonExpressionFactory |
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{ |
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use TablePrefixer; |
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/** @var Connection */ |
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protected $connection; |
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public function __construct(Connection $connection) |
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{ |
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$this->connection = $connection; |
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} |
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/** |
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* Returns the current connection instance. |
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* |
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* @return connection |
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*/ |
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public function getConnection(): Connection |
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{ |
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return $this->connection; |
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} |
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/** |
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* Normalises the values passed as nodes |
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* |
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* @param mixed $nodes |
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* @return string |
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*/ |
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protected function normaliseNodes($nodes): string |
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{ |
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// If its not an array, cast. |
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if (!is_array($nodes)) { |
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$nodes = [$nodes]; |
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} |
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// Remove all none string. |
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$nodes = array_filter($nodes, function ($node): bool { |
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return is_string($node); |
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}); |
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// If we have no nodes, throw. |
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if (count($nodes) === 0) { |
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throw new Exception("Only strings values may be passed as nodes."); |
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} |
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return \implode('.', $nodes); |
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} |
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/** |
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* @param string $column The database column which holds the JSON value |
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* @param string|string[] $nodes The json key/index to search |
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* @return \Pixie\QueryBuilder\Raw |
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*/ |
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public function extractAndUnquote(string $column, $nodes): Raw |
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{ |
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// Normalise nodes. |
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$nodes = $this->normaliseNodes($nodes); |
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// Add any possible prefixes to the key |
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$column = $this->addTablePrefix($column, true); |
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return new Raw("JSON_UNQUOTE(JSON_EXTRACT({$column}, \"$.{$nodes}\"))"); |
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} |
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} |
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gin0115 /
pixie-wpdb
