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<?php |
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/** |
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* JSON backend for Postgres using the {@link JSONText} DB field. Allows us to use Postgres JSON query syntax within |
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* the module. |
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* |
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* @package silverstripe-jsontext |
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* @subpackage models |
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* @author Russell Michell <[email protected]> |
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*/ |
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namespace JSONText\Backends; |
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use JSONText\Exceptions\JSONTextException; |
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use JSONText\Fields\JSONText; |
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class JSONBackend |
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{ |
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/** |
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* @var mixed |
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*/ |
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protected $key; |
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/** |
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* @var mixed |
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*/ |
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protected $val; |
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/** |
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* @var int |
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*/ |
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protected $idx; |
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/** |
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* @var string |
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*/ |
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protected $operand; |
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/** |
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* Not used. |
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* |
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* @var string |
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*/ |
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protected $operator; |
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/** |
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* @var JSONText |
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*/ |
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protected $jsonText; |
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/** |
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* PostgresJSONBackend constructor. |
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* |
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* @param mixed $key |
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* @param mixed $val |
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* @param int $idx |
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* @param string $operand |
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* @param JSONText $jsonText |
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*/ |
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public function __construct($key, $val, $idx, $operator, $operand, $jsonText) |
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{ |
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$this->key = $key; |
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$this->val = $val; |
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$this->idx = $idx; |
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$this->operator = $operator; |
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$this->operand = $operand; |
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$this->jsonText = $jsonText; |
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} |
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/** |
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* Match on keys by INT. |
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* |
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* @return array |
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*/ |
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public function matchIfKeyIsInt() |
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{ |
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if (is_int($this->operand) && $this->idx === $this->operand) { |
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return [$this->key => $this->val]; |
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} |
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return []; |
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} |
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/** |
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* Match on keys by STRING. |
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* |
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* @return array |
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*/ |
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public function matchIfKeyIsStr() |
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{ |
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// operand can be a numeric string if it wants here |
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if (is_string($this->operand) && $this->key === $this->operand) { |
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return [$this->key => $this->val]; |
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} |
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return []; |
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} |
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/** |
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* Match on path. |
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* |
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* @return array |
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* @throws \JSONText\Exceptions\JSONTextException |
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*/ |
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public function matchOnPath() |
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{ |
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if (!is_string($this->operand) || !$this->jsonText->isJson($this->operand)) { |
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$msg = 'Invalid JSON passed as operand on RHS.'; |
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throw new JSONTextException($msg); |
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} |
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$operandAsArray = $this->jsonText->toArray($this->operand); |
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// Empty is OK..could've been accidental... |
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if (!count($operandAsArray)) { |
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return []; |
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} |
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$keys = array_keys($operandAsArray); |
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if (count($keys) >1) { |
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$msg = 'Sorry. I can\'t handle complex operands.'; |
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throw new JSONTextException($msg); |
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} |
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$vals = array_values($operandAsArray); |
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if (count($vals) >1) { |
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$msg = 'Sorry. I can\'t handle complex operands.'; |
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throw new JSONTextException($msg); |
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} |
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if ($this->key === $keys[0] && is_array($this->val) && !empty($this->val[$vals[0]])) { |
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return $this->val[$vals[0]]; |
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} |
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return []; |
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} |
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} |
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phptek /
silverstripe-jsontext
