<?php

namespace Ulmus\Common;

use PDO, PDOStatement;

class PdoObject extends PDO {

    public function select(string $sql, array $parameters = []) : PDOStatement
    {
#        var_dump($sql, $parameters);
 #       die();
        try {
            if ( false !== ( $statement = $this->prepare($sql) ) ) {
                $statement = $this->execute($statement, $parameters, false);
                $statement->setFetchMode(\PDO::FETCH_ASSOC);
                
                return $statement;
            }
        } catch (\PDOException $e) { throw $e; }
    }

    public function runQuery(string $sql, array $parameters = []) : PDOStatement
    {
        try {
            if ( false !== ( $statement = $this->prepare($sql) ) ) {
                return $this->execute($statement, $parameters, true);
            }
        } catch (\PDOException $e) { throw $e; }
    }
    
    public function execute(PDOStatement $statement, array $parameters = [], bool $commit = true) : ? PDOStatement
    {
       try {
           if (! $this->inTransaction() ) {
               $this->beginTransaction();
           }
           
           if ( empty($parameters) ? $statement->execute() : $statement->execute($parameters) ) {
                if ( $commit ) {
                   $this->commit();
                }

               return $statement;
           }
           else {
               throw new PDOException('Could not begin transaction or given statement is invalid.');
           }
       } catch (\PDOException $e) {
           $this->rollback();
           throw $e;
       }

       return null;
   }

}