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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\Db\Pgsql\Expression; |
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use Yiisoft\Db\Expression\ArrayExpression; |
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use Yiisoft\Db\Expression\ExpressionBuilderInterface; |
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use Yiisoft\Db\Expression\ExpressionBuilderTrait; |
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use Yiisoft\Db\Expression\ExpressionInterface; |
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use Yiisoft\Db\Expression\JsonExpression; |
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use Yiisoft\Db\Pgsql\Schema\Schema; |
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use Yiisoft\Db\Query\Query; |
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/** |
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* Class ArrayExpressionBuilder builds {@see ArrayExpression} for Postgres SQL DBMS. |
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*/ |
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class ArrayExpressionBuilder implements ExpressionBuilderInterface |
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{ |
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use ExpressionBuilderTrait; |
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/** |
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* {@inheritdoc} |
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* |
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* @param ArrayExpression|ExpressionInterface $expression the expression to be built |
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*/ |
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public function build(ExpressionInterface $expression, array &$params = []): string |
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{ |
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$value = $expression->getValue(); |
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if ($value === null) { |
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return 'NULL'; |
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} |
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if ($value instanceof Query) { |
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[$sql, $params] = $this->queryBuilder->build($value, $params); |
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return $this->buildSubqueryArray($sql, $expression); |
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} |
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$placeholders = $this->buildPlaceholders($expression, $params); |
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return 'ARRAY[' . \implode(', ', $placeholders) . ']' . $this->getTypehint($expression); |
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} |
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/** |
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* Builds placeholders array out of $expression values |
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* |
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* @param ExpressionInterface|ArrayExpression $expression |
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* @param array $params the binding parameters. |
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* |
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* @return array |
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*/ |
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protected function buildPlaceholders(ExpressionInterface $expression, &$params): array |
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{ |
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$value = $expression->getValue(); |
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$placeholders = []; |
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if ($value === null || (!\is_array($value) && !$value instanceof \Traversable)) { |
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return $placeholders; |
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} |
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if ($expression->getDimension() > 1) { |
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foreach ($value as $item) { |
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$placeholders[] = $this->build($this->unnestArrayExpression($expression, $item), $params); |
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} |
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return $placeholders; |
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} |
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foreach ($value as $item) { |
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if ($item instanceof Query) { |
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list($sql, $params) = $this->queryBuilder->build($item, $params); |
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$placeholders[] = $this->buildSubqueryArray($sql, $expression); |
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continue; |
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} |
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$item = $this->typecastValue($expression, $item); |
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if ($item instanceof ExpressionInterface) { |
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$placeholders[] = $this->queryBuilder->buildExpression($item, $params); |
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continue; |
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} |
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$placeholders[] = $this->queryBuilder->bindParam($item, $params); |
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} |
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return $placeholders; |
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} |
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/** |
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* @param ArrayExpression $expression |
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* @param mixed $value |
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* |
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* @return ArrayExpression |
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*/ |
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private function unnestArrayExpression(ArrayExpression $expression, $value): ArrayExpression |
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{ |
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$expressionClass = \get_class($expression); |
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return new $expressionClass($value, $expression->getType(), $expression->getDimension() - 1); |
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} |
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/** |
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* @param ArrayExpression $expression |
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* |
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* @return string the typecast expression based on {@see type} |
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*/ |
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protected function getTypehint(ArrayExpression $expression): string |
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{ |
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if ($expression->getType() === null) { |
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return ''; |
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} |
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$result = '::' . $expression->getType(); |
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$result .= \str_repeat('[]', $expression->getDimension()); |
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return $result; |
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} |
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/** |
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* Build an array expression from a subquery SQL. |
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* |
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* @param string $sql the subquery SQL. |
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* @param ArrayExpression $expression. |
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* |
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* @return string the subquery array expression. |
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*/ |
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protected function buildSubqueryArray($sql, ArrayExpression $expression): string |
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{ |
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return 'ARRAY(' . $sql . ')' . $this->getTypehint($expression); |
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} |
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/** |
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* Casts $value to use in $expression |
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* |
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* @param ArrayExpression $expression |
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* @param mixed $value |
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* |
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* @return int|JsonExpression |
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*/ |
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protected function typecastValue(ArrayExpression $expression, $value) |
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{ |
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if ($value instanceof ExpressionInterface) { |
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return $value; |
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} |
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if (\in_array($expression->getType(), [Schema::TYPE_JSON, Schema::TYPE_JSONB], true)) { |
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return new JsonExpression($value); |
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} |
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return $value; |
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} |
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} |
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yiisoft /
db-pgsql
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