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<?php |
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namespace Belamov\PostgresRange\Ranges; |
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use JsonSerializable; |
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abstract class Range implements JsonSerializable |
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{ |
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protected string $fromBound; |
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protected string $toBound; |
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protected ?string $from; |
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protected ?string $to; |
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public function __construct(?string $from = null, ?string $to = null, string $fromBound = '[', string $toBound = ')') |
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{ |
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$this->from = $from; |
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$this->to = $to; |
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$this->fromBound = $fromBound; |
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$this->toBound = $toBound; |
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$this->checkForEmptyBoundaries(); |
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} |
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/** |
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* @return mixed |
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*/ |
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public function from() |
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{ |
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if ($this->from === null) { |
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return; |
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} |
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return $this->transformBoundary($this->from); |
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} |
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/** |
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* @param string $boundary |
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* @return mixed |
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*/ |
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abstract protected function transformBoundary(string $boundary); |
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/** |
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* @return mixed |
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*/ |
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public function to() |
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{ |
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if ($this->to === null) { |
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return; |
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} |
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return $this->transformBoundary($this->to); |
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} |
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public function hasLowerBoundary(): bool |
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{ |
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return $this->from !== null; |
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} |
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public function hasUpperBoundary(): bool |
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{ |
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return $this->to !== null; |
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} |
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/** |
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* @return string |
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*/ |
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public function __toString() |
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{ |
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return "{$this->fromBound}{$this->from},{$this->to}{$this->toBound}"; |
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} |
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/** |
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* @return string |
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*/ |
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abstract public function forSql(): string; |
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private function checkForEmptyBoundaries(): void |
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{ |
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if ($this->to === '') { |
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$this->to = null; |
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} |
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if ($this->from === '') { |
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$this->from = null; |
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} |
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} |
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public function fromBound(): string |
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{ |
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return $this->fromBound; |
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} |
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public function toBound(): string |
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{ |
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return $this->toBound; |
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} |
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public function jsonSerialize(): string |
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{ |
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return $this->__toString(); |
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} |
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} |
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belamov /
postgres-range
