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<?php |
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declare(strict_types=1); |
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namespace QB\Generic\Statement; |
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use QB\Generic\Clause\Table; |
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use QB\Generic\Expr\Expr; |
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use QB\Generic\IQueryPart; |
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use RuntimeException; |
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class Delete implements IDelete |
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{ |
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/** @var array<int,Table|string> */ |
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protected array $tables = []; |
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/** @var string[] */ |
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protected array $modifiers = []; |
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/** @var IQueryPart[] */ |
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protected array $whereParts = []; |
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/** |
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* @param Table|string ...$tables |
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* |
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* @return $this |
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*/ |
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public function from(Table|string ...$tables): static |
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{ |
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$this->tables = array_merge($this->tables, $tables); |
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return $this; |
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} |
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/** |
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* @param IQueryPart|string ...$whereParts |
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* |
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* @return $this |
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*/ |
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public function where(IQueryPart|string ...$whereParts): static |
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{ |
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foreach ($whereParts as $wherePart) { |
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$wherePart = is_string($wherePart) ? new Expr($wherePart) : $wherePart; |
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$this->whereParts[] = $wherePart; |
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} |
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return $this; |
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} |
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/** |
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* @return string |
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*/ |
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public function __toString(): string |
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{ |
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if (!$this->isValid()) { |
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throw new RuntimeException('Under-initialized DELETE query. Table and where are necessary'); |
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} |
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$delete = $this->delete(); |
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$sqlParts = array_merge( |
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[$delete], |
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$this->getWhere(), |
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); |
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$sqlParts = array_filter($sqlParts); |
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return implode(PHP_EOL, $sqlParts); |
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} |
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public function isValid(): bool |
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{ |
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return count($this->tables) === 1 || count($this->whereParts) > 0; |
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} |
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protected function delete(): string |
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{ |
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$sql = []; |
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$sql[] = 'DELETE'; |
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$sql[] = $this->getModifiers(); |
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$sql[] = 'FROM'; |
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$sql[] = $this->tables[0]; |
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$sql = array_filter($sql); |
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return implode(' ', $sql); |
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} |
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protected function getModifiers(): string |
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{ |
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if (empty($this->modifiers)) { |
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return ''; |
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} |
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return implode(' ', $this->modifiers); |
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} |
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protected function getWhere(): array |
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{ |
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if (count($this->whereParts) === 0) { |
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return []; |
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} |
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$whereParts = []; |
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foreach ($this->whereParts as $wherePart) { |
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$whereParts[] = (string)$wherePart; |
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} |
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return ['WHERE ' . implode(' AND ', $whereParts)]; |
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} |
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/** |
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* @return array |
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*/ |
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public function getParams(): array |
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{ |
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$params = []; |
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foreach ($this->whereParts as $wherePart) { |
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$params = array_merge($params, $wherePart->getParams()); |
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} |
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return $params; |
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} |
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} |
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abterphp /
qb
