<?php

class dbAbstract {

    private $type;
    private $host;
    private $port;
    private $dataBase;
    private $user;
    private $password;
    private $conn;
    private $queryIbase;
    private $queryOracle;
    private $ociResourceError;

    public function __construct($type, $host, $port, $dataBase, $user, $password) {
        $this->type = $type;
        $this->host = $host;
        $this->port = $port;
        $this->dataBase = $dataBase;
        $this->user = $user;
        $this->password = $password;
    }

    function db_connect() {
        $conn = null;
        if ($this->type == DB__MSSQL) {
            $conn = @mssql_connect($this->host . ($this->port ? ":$this->port" : ''), $this->user, $this->password);
            if ($conn)
                mssql_select_db($this->dataBase, $conn);
        }
        else if ($this->type == DB__PGSQL) {
            $connectStr = sprintf("host='%s' port='%s' dbname='%s' user='%s' password='%s'", $this->host, ($this->port ? $this->port : DB__PGSQL_PORT), $this->dataBase, $this->user, $this->password);
            $conn = @pg_connect($connectStr);
        } else if ($this->type == DB_FBIIBS) {
            $connectStr = sprintf("%s/%s:%s", $this->host, ($this->port ? $this->port : DB_FBIIBS_PORT), $this->dataBase);
            $conn = @ibase_connect($connectStr, $this->user, $this->password);
        } else if ($this->type == DB_ORACLE) {
            $connectStr = sprintf("(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=%s)(PORT=%s)))(CONNECT_DATA=(SERVER=DEDICATED)(SID=%s)))", $this->host, ($this->port ? $this->port : DB_ORACLE_PORT), $this->dataBase);
            $conn = @oci_connect($this->user, $this->password, $connectStr);
            if (!$conn) {
                $connectStr = sprintf("(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=%s)(PORT=%s)))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=%s)))", $this->host, ($this->port ? $this->port : DB_ORACLE_PORT), $this->dataBase);
                $conn = @oci_connect($this->user, $this->password, $connectStr);
            }
            $this->ociResourceError = $conn;
        } else if ($this->type == DB__MYSQL) {
            $connectStr = sprintf("%s:%s", $this->host, ($this->port ? $this->port : DB__MYSQL_PORT));
            $conn = mysql_connect($connectStr, $this->user, $this->password);
            if ($conn && $this->dataBase)
                mysql_select_db($this->dataBase);
        }
        $this->conn = $conn;
        return $conn ? true : false;
    }

    function db_close() {
        if ($this->type == DB__MSSQL) {
            return mssql_close($this->conn);
        } else if ($this->type == DB__PGSQL) {
            return pg_close($this->conn);
        } else if ($this->type == DB_FBIIBS) {
            return ibase_close($this->conn);
        } else if ($this->type == DB_ORACLE) {
            return oci_close($this->conn);
        } else if ($this->type == DB__MYSQL) {
            return mysql_close($this->conn);
        }
        return false;
    }

    function db_query($query) {
        if ($this->type == DB__MSSQL) {
            return mssql_query($query, $this->conn);
        } else if ($this->type == DB__PGSQL) {
            return pg_query($this->conn, $query);
        } else if ($this->type == DB_FBIIBS) {
            $this->queryIbase = $query;
            return ibase_query($this->conn, $query);
        } else if ($this->type == DB_ORACLE) {
            $ret = false;
            $this->queryOracle = $query;
            $result = oci_parse($this->conn, $query);
            if ($result) {
                $this->ociResourceError = $result;
                $ret = oci_execute($result);
            }
            return $ret ? $result : false;
        } else if ($this->type == DB__MYSQL) {
            return mysql_query($query, $this->conn);
        }
        return false;
    }

    function db_fetch_array($result) {
        if ($this->type == DB__MSSQL) {
            return $this->PadronizaKey(mssql_fetch_array($result, MSSQL_ASSOC));
        } else if ($this->type == DB__PGSQL) {
            return pg_fetch_array($result, null, PGSQL_ASSOC);
        } else if ($this->type == DB_FBIIBS) {
            return $this->PadronizaKey(ibase_fetch_assoc($result));
        } else if ($this->type == DB_ORACLE) {
            return $this->PadronizaKey(oci_fetch_array($result, OCI_ASSOC + OCI_RETURN_NULLS));
        } else if ($this->type == DB__MYSQL) {
            return $this->PadronizaKey(mysql_fetch_array($result, MYSQL_ASSOC));
        }
        return false;
    }

    function db_fetch_row($result) {
        if ($this->type == DB__MSSQL) {
            return mssql_fetch_row($result);
        } else if ($this->type == DB__PGSQL) {
            return pg_fetch_row($result);
        } else if ($this->type == DB_FBIIBS) {
            return ibase_fetch_row($result);
        } else if ($this->type == DB_ORACLE) {
            return oci_fetch_row($result);
        } else if ($this->type == DB__MYSQL) {
            return mysql_fetch_row($result);
        }
        return false;
    }

    function db_num_rows($result) {
        if ($this->type == DB__MSSQL) {
            return mssql_num_rows($result);
        } else if ($this->type == DB__PGSQL) {
            return pg_num_rows($result);
        } else if ($this->type == DB_FBIIBS) {
            $query = "select count(*) as num_rows " . substr($this->queryIbase, stripos($this->queryIbase, 'from'));
            $result = ibase_query($this->conn, $query);
            if ($result) {
                $row = ibase_fetch_row($result);
                return $row[0];
            }
            return 0;
        } else if ($this->type == DB_ORACLE) {
            $query = "select count(*) as num_rows " . substr($this->queryOracle, stripos($this->queryOracle, 'from'));
            $result = oci_parse($this->conn, $query);
            if ($result) {
                oci_execute($result);
                $row = oci_fetch_row($result);
                return $row[0];
            }
            return oci_num_rows($result);
        } else if ($this->type == DB__MYSQL) {
            return mysql_num_rows($result);
        }
        return false;
    }

    function db_rows_affected($result) {
        if ($this->type == DB__MSSQL) {
            return mssql_rows_affected($this->conn);
        } else if ($this->type == DB__PGSQL) {
            return pg_affected_rows($result);
        } else if ($this->type == DB_FBIIBS) {
            return ibase_affected_rows();
        } else if ($this->type == DB_ORACLE) {
            return oci_num_rows($result);
        } else if ($this->type == DB__MYSQL) {
            return mysql_affected_rows($this->conn);
        }
        return false;
    }

    function db_getmessage() {
        if ($this->type == DB__MSSQL) {
            return mssql_get_last_message();
        } else if ($this->type == DB__PGSQL) {
            return pg_last_error($this->conn);
        } else if ($this->type == DB_FBIIBS) {
            return ibase_errmsg();
        } else if ($this->type == DB_ORACLE) {
            $error = oci_error($this->ociResourceError);
            return $error["message"];
        } else if ($this->type == DB__MYSQL) {
            return mysql_error($this->conn);
        }
        return false;
    }

    private function PadronizaKey($ar) {
        $arResult = array();
        foreach ($ar as $key => $value) {
            $newKey = strtolower($key);
            $arResult[$newKey] = $value;
        }
        return $arResult;
    }

}

?>