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<?php |
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namespace Belamov\PostgresRange\Ranges; |
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/** |
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* Class CanonicalRange. |
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* |
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* Range that automatically canonicalizes its boundaries to [) |
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*/ |
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abstract class CanonicalRange extends Range |
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{ |
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public function __construct(string $from = null, string $to = null, $fromBound = '[', $toBound = ')') |
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{ |
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parent::__construct($from, $to, $fromBound, $toBound); |
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$this->canonicalizeBoundaries(); |
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} |
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/** |
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* The built-in range types int4range, int8range, and daterange all use a canonical form |
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* that includes the lower bound and excludes the upper bound; that is, [). |
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*/ |
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private function canonicalizeBoundaries(): void |
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{ |
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$this->canonicalizeLowerBoundary(); |
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$this->canonicalizeUpperBoundary(); |
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} |
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private function canonicalizeLowerBoundary(): void |
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{ |
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if ($this->fromBound === '(') { |
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if ($this->from !== null) { |
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$this->from = $this->addToDiscreteBoundary($this->from); |
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} |
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$this->fromBound = '['; |
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} |
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} |
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/** |
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* @param string $boundary |
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* @return string |
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*/ |
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abstract protected function addToDiscreteBoundary(string $boundary): string; |
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private function canonicalizeUpperBoundary(): void |
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{ |
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if ($this->toBound === ']') { |
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if ($this->to !== null) { |
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$this->to = $this->addToDiscreteBoundary($this->to); |
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} |
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$this->toBound = ')'; |
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} |
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} |
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public function fromBound(): string |
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{ |
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$this->canonicalizeLowerBoundary(); |
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return parent::fromBound(); |
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} |
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public function toBound(): string |
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{ |
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$this->canonicalizeUpperBoundary(); |
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return parent::toBound(); |
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} |
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} |
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belamov /
postgres-range
