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<?php
namespace Doctrine\DBAL\Driver\PgSQL;
use Doctrine\DBAL\Driver\FetchUtils;
use Doctrine\DBAL\Driver\PgSQL\Exception\UnexpectedValue;
use Doctrine\DBAL\Driver\Result as ResultInterface;
use PgSql\Result as PgSqlResult;
use TypeError;
use function array_keys;
use function array_map;
use function assert;
use function get_class;
use function gettype;
use function hex2bin;
use function is_object;
use function is_resource;
use function pg_affected_rows;
use function pg_fetch_all;
use function pg_fetch_all_columns;
use function pg_fetch_assoc;
use function pg_fetch_row;
use function pg_field_name;
use function pg_field_type;
use function pg_free_result;
use function pg_num_fields;
use function sprintf;
use function substr;
use const PGSQL_ASSOC;
use const PGSQL_NUM;
use const PHP_INT_SIZE;
final class Result implements ResultInterface
{
/** @var PgSqlResult|resource|null */
private $result;
/** @param PgSqlResult|resource $result */
public function __construct($result)
{
if (! is_resource($result) && ! $result instanceof PgSqlResult) {
throw new TypeError(sprintf(
'Expected result to be a resource or an instance of %s, got %s.',
PgSqlResult::class,
is_object($result) ? get_class($result) : gettype($result),
));
}
$this->result = $result;
}
public function __destruct()
{
if (! isset($this->result)) {
return;
}
$this->free();
}
/** {@inheritdoc} */
public function fetchNumeric()
{
if ($this->result === null) {
return false;
}
$row = pg_fetch_row($this->result);
if ($row === false) {
return false;
}
return $this->mapNumericRow($row, $this->fetchNumericColumnTypes());
}
/** {@inheritdoc} */
public function fetchAssociative()
{
if ($this->result === null) {
return false;
}
$row = pg_fetch_assoc($this->result);
if ($row === false) {
return false;
}
return $this->mapAssociativeRow($row, $this->fetchAssociativeColumnTypes());
}
/** {@inheritdoc} */
public function fetchOne()
{
return FetchUtils::fetchOne($this);
}
/** {@inheritdoc} */
public function fetchAllNumeric(): array
{
if ($this->result === null) {
return [];
}
$resultSet = pg_fetch_all($this->result, PGSQL_NUM);
// On PHP 7.4, pg_fetch_all() might return false for empty result sets.
if ($resultSet === false) {
return [];
}
$types = $this->fetchNumericColumnTypes();
return array_map(
fn (array $row) => $this->mapNumericRow($row, $types),
$resultSet,
);
}
/** {@inheritdoc} */
public function fetchAllAssociative(): array
{
if ($this->result === null) {
return [];
}
$resultSet = pg_fetch_all($this->result, PGSQL_ASSOC);
// On PHP 7.4, pg_fetch_all() might return false for empty result sets.
if ($resultSet === false) {
return [];
}
$types = $this->fetchAssociativeColumnTypes();
return array_map(
fn (array $row) => $this->mapAssociativeRow($row, $types),
$resultSet,
);
}
/** {@inheritdoc} */
public function fetchFirstColumn(): array
{
if ($this->result === null) {
return [];
}
$postgresType = pg_field_type($this->result, 0);
return array_map(
fn ($value) => $this->mapType($postgresType, $value),
pg_fetch_all_columns($this->result),
);
}
public function rowCount(): int
{
if ($this->result === null) {
return 0;
}
return pg_affected_rows($this->result);
}
public function columnCount(): int
{
if ($this->result === null) {
return 0;
}
return pg_num_fields($this->result);
}
public function free(): void
{
if ($this->result === null) {
return;
}
pg_free_result($this->result);
$this->result = null;
}
/** @return array<int, string> */
private function fetchNumericColumnTypes(): array
{
assert($this->result !== null);
$types = [];
$numFields = pg_num_fields($this->result);
for ($i = 0; $i < $numFields; ++$i) {
$types[$i] = pg_field_type($this->result, $i);
}
return $types;
}
/** @return array<string, string> */
private function fetchAssociativeColumnTypes(): array
{
assert($this->result !== null);
$types = [];
$numFields = pg_num_fields($this->result);
for ($i = 0; $i < $numFields; ++$i) {
$types[pg_field_name($this->result, $i)] = pg_field_type($this->result, $i);
}
return $types;
}
/**
* @param list<string|null> $row
* @param array<int, string> $types
*
* @return list<mixed>
*/
private function mapNumericRow(array $row, array $types): array
{
assert($this->result !== null);
return array_map(
fn ($value, $field) => $this->mapType($types[$field], $value),
$row,
array_keys($row),
);
}
/**
* @param array<string, string|null> $row
* @param array<string, string> $types
*
* @return array<string, mixed>
*/
private function mapAssociativeRow(array $row, array $types): array
{
assert($this->result !== null);
$mappedRow = [];
foreach ($row as $field => $value) {
$mappedRow[$field] = $this->mapType($types[$field], $value);
}
return $mappedRow;
}
/** @return string|int|float|bool|null */
private function mapType(string $postgresType, ?string $value)
{
if ($value === null) {
return null;
}
switch ($postgresType) {
case 'bool':
switch ($value) {
case 't':
return true;
case 'f':
return false;
}
throw UnexpectedValue::new($value, $postgresType);
case 'bytea':
return hex2bin(substr($value, 2));
case 'float4':
case 'float8':
return (float) $value;
case 'int2':
case 'int4':
return (int) $value;
case 'int8':
return PHP_INT_SIZE >= 8 ? (int) $value : $value;
}
return $value;
}
}
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