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<?php |
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declare(strict_types=1); |
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namespace QB\MySQL\Clause; |
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use QB\Generic\IQueryPart; |
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class CombiningQuery |
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{ |
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public const TYPE_UNION = 'UNION'; |
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public const MODIFIER_ALL = 'ALL'; |
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public const MODIFIER_DISTINCT = 'DISTINCT'; |
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protected const VALID_TYPE = [null, self::TYPE_UNION]; |
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protected const VALID_MODIFIERS = [null, self::MODIFIER_ALL, self::MODIFIER_DISTINCT]; |
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protected string $type; |
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protected IQueryPart $queryPart; |
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protected ?string $modifier = null; |
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/** |
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* CombiningQuery constructor. |
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* |
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* @param string $type |
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* @param IQueryPart $queryPart |
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* @param string|null $modifier |
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*/ |
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public function __construct(string $type, IQueryPart $queryPart, ?string $modifier = null) |
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{ |
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if (!$this->isValid($type, $modifier)) { |
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throw new \InvalidArgumentException( |
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sprintf('invalid arguments for %s. arguments: %s', __CLASS__, print_r([$type, $modifier], true)) |
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); |
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} |
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$this->type = $type; |
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$this->queryPart = $queryPart; |
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$this->modifier = $modifier; |
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} |
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/** |
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* @param string $type |
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* @param string|null $modifier |
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* |
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* @return bool |
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*/ |
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private function isValid(string $type, ?string $modifier = null): bool |
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{ |
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if (!in_array($type, static::VALID_TYPE, true)) { |
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return false; |
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} |
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if (!in_array($modifier, static::VALID_MODIFIERS, true)) { |
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return false; |
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} |
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return true; |
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} |
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/** |
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* @return string |
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*/ |
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public function __toString(): string |
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{ |
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$modifier = ''; |
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if ($this->modifier) { |
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$modifier = ' ' . $this->modifier; |
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} |
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$parts = []; |
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$parts[] = $this->type . $modifier; |
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$parts[] = (string)$this->queryPart; |
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return implode(PHP_EOL, $parts); |
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} |
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} |
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abterphp /
qb
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