<?php

/*
 * SCROTT IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * For more information, please refer to UNLICENSE
 */

require_once "class/database.class.php";

/*
 * This class implements support for MySQL and MariaDB via PHP's mysqli
 * driver.
 */
class mysql extends database
{
    private $db;

    /*
     * Constructor
     */
    public function __construct(string $host, string $uname, string $passwd, string $dbname)
    {
        $this->db = new mysqli($host, $uname, $passwd, $dbname);

        if ($this->db->connect_error)
            throw new Exception("Can not connect to MySQL database.  Please check your configuration.");
    }

    /*
     * Close connection to DB
     */
    protected function _close() : void
    {
        $this->db->close();
    }

    /*
     * Make a query of the database.  Return data as an array of arrays.
     */
    protected function _query(string $query) : array
    {
        $arr = array();
        $res = $this->db->query($query);

        if ($res === true || $res === false)
            return $arr;

        while (($arr[] = $res->fetch_assoc()));
        return array_filter($arr, function ($val) { return !is_null($val); });
    }

    /*
     * Escape a string for use in a query
     */
    protected function _esc(string $str) : string
    {
        return $this->db->real_escape_string($str);
    }
}

?>