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<?php |
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namespace Smoren\QueryRelationManager\Pdo; |
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use PDO; |
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use Smoren\QueryRelationManager\Base\QueryRelationManagerException; |
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use Smoren\QueryRelationManager\Base\QueryWrapperInterface; |
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/** |
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* QueryWrapper implementation for PDO |
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* @author Smoren <[email protected]> |
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*/ |
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class QueryWrapper implements QueryWrapperInterface |
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{ |
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/** |
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* @var PDO|null PDO connection object |
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*/ |
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protected static ?PDO $pdo = null; |
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/** |
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* @var string SQL query string |
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*/ |
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protected string $query; |
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/** |
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* @var array<string, scalar> values of dynamic query params |
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*/ |
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protected array $mapParams; |
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/** |
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* Creates and sets default connection to DB |
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* @param string $dsn DSN |
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* @param string $username username |
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* @param string|null $password password |
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* @return PDO PDO connection object |
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*/ |
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public static function setDbConfig(string $dsn, string $username, ?string $password = null): PDO |
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{ |
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static::$pdo = new PDO( |
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$dsn, |
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$username, |
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$password, |
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[ |
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PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION, |
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PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC, |
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PDO::ATTR_EMULATE_PREPARES => false, |
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] |
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); |
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return static::$pdo; |
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} |
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/** |
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* QueryWrapper constructor. |
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*/ |
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public function __construct() |
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{ |
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$this->query = ''; |
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$this->mapParams = []; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function select(array $arSelect): QueryWrapperInterface |
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{ |
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$this->query .= 'SELECT '; |
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$buf = []; |
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foreach($arSelect as $alias => $field) { |
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$buf[] = addslashes($field).' AS '.addslashes($alias); |
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} |
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$this->query .= implode(', ', $buf).' '; |
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return $this; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function from(array $mapFrom): QueryWrapperInterface |
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{ |
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$this->query .= ' FROM '; |
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foreach($mapFrom as $alias => $tableName) { |
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$this->query .= ' '.addslashes($tableName).' '.addslashes($alias).' '; |
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break; |
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} |
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return $this; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function join( |
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string $type, |
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array $mapTable, |
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string $condition, |
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array $extraJoinParams = [] |
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): QueryWrapperInterface { |
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$this->query .= " ".addslashes($type)." JOIN "; |
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foreach($mapTable as $alias => $tableName) { |
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$this->query .= addslashes($tableName).' '.addslashes($alias).' '; |
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break; |
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} |
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$this->query .= " ON {$condition} "; |
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foreach($extraJoinParams as $key => $val) { |
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$this->mapParams[$key] = $val; |
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} |
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return $this; |
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} |
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/** |
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* @inheritDoc |
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* @param PDO|null $db DB connection object |
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* @return array<array<mixed>> |
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* @throws QueryRelationManagerException |
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*/ |
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public function all($db = null): array |
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{ |
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$db = $db ?? static::$pdo; |
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if(!$db) { |
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throw new QueryRelationManagerException('no pdo connection opened'); |
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} |
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$q = $db->prepare($this->query); |
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foreach($this->mapParams as $key => $val) { |
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$q->bindValue($key, $val); |
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} |
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$q->execute(); |
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return $q->fetchAll() ?: []; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function getRawSql(): string |
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{ |
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$from = array_keys($this->mapParams); |
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$to = array_values($this->mapParams); |
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foreach($to as &$param) { |
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$param = "'{$param}'"; |
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} |
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unset($param); |
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return str_replace($from, $to, $this->query); |
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} |
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/** |
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* Sets raw SQL to query |
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* @param string $sql raw SQL string |
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* @return $this |
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*/ |
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public function setRawSql(string $sql): self |
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{ |
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$this->query = $sql; |
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return $this; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function &getQuery() |
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{ |
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return $this->query; |
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} |
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} |
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