<?php

namespace database;

include_once "../../global.inc.php";
include_once PATH_CONFIG . "/config.db.php";

/**
 * The SQLManager manage the SQL-Connection for an API
 * @author stubbfel
 * @since 20.06.2013
 */
abstract class SqlManager {

    /**
     * Variable for address of the server
     * @var string
     */
    private $serverAddress;

    /**
     * Variable for name of the databaseuser
     * @var string
     */
    private $userName;

    /**
     * Variable for name of the database
     * @var string
     */
    private $dbName;

    /**
     * Variable for password of the user
     * @var string
     */
    private $userPw;

    /**
     * Variable for link of the connection to the server
     * @var connection
     */
    private $link;

    /**
     * String for a and operrator
     * @var string
     */
    protected $andTerm = " and ";

    /**
     * String for quotes in a query
     * @var string
     */
    protected $quoteTerm = "\"";

    /**
     * Default-Constructor
     */
    public function __construct() {
        $this->serverAddress = \config\DBConfig::$sqlServer;
        $this->dbName = \config\DBConfig::$sqlDBName;
        $this->userName = \config\DBConfig::$sqlDBUser;
        $this->userPw = \config\DBConfig::$sqlDBUserPW;
    }

    /**
     * Default-DEConstructor
     */
    public function __destruct() {
        $this->closeConnection();
        $this->serverAddress = null;
        $this->dbName = null;
        $this->userName = null;
        $this->userPW = null;
    }

    /**
     * Method setup the connection to the Database
     */
    public function connect() {
        $this->link = mysql_connect($this->serverAddress, $this->userName, $this->userPw);
        if (!$this->link) {
            exit("No Connection: " . mysql_error());
        }
        $selected = mysql_select_db($this->dbName, $this->link);
        if (!$selected) {
            exit("No DB: " . mysql_error());
        }
    }

    /**
     * Method close the connection
     */
    public function closeConnection() {
        if ($this->link) {
            mysql_close($this->link);
            $this->link = null;
        }
    }

    /**
     * Method send a query to the Datebase and return the result
     * @param string $query
     * @return result[num][assoc]
     */
    protected function query($query) {
        $mysqlResult = mysql_query($query, $this->link);
        if (!$mysqlResult) {
            exit("Query error: " . mysql_error());
        }
        $rowNums = mysql_num_rows($mysqlResult);
        $result = array();
        for ($i = 0; $i < $rowNums; $i++) {
            $row = mysql_fetch_assoc($mysqlResult);
            $result[$i] = $row;
        }
        mysql_free_result($mysqlResult);
        return $result;
    }

    /**
     * Method if the string is not a empty String (not only spaces and controlls)
     * @param string $string
     * @return boolean
     */
    protected function validString($string) {
        if (!ctype_space($string) && !ctype_cntrl($string)) {
            return TRUE;
        }
        return FALSE;
    }

}

?>