.
// Should not be enabled for public code
//ini_set('display_errors', 'stdout');
//error_reporting(E_ALL);
/// represents a connection to a database.
// Intended to be subclassed (e.g., BoincDb, BossaDb)
class DbConn {
var $db_conn;
var $db_name;
function init_conn($user, $passwd, $host, $name) {
$this->db_conn = mysql_pconnect($host, $user, $passwd);
if (!$this->db_conn) {
return false;
}
$this->db_name = $name;
return true;
}
function do_query($q) {
//echo "query: $q
\n";
$ret = mysql_query($q, $this->db_conn);
if (!$ret) {
echo "Database Error
\n";
//echo ": ", mysql_error(), "\n";
//var_dump(debug_backtrace());
//echo "query: $q\n";
return null;
}
return $ret;
}
function affected_rows() {
return mysql_affected_rows($this->db_conn);
}
function lookup_fields($table, $classname, $fields, $clause) {
$query = "select $fields from ".$this->db_name.".$table where $clause";
$result = $this->do_query($query);
if (!$result) {
return null;
}
$obj = mysql_fetch_object($result, $classname);
mysql_free_result($result);
return $obj;
}
function lookup($table, $classname, $clause) {
$query = "select * from ".$this->db_name.".$table where $clause";
$result = $this->do_query($query);
if (!$result) {
return null;
}
$obj = mysql_fetch_object($result, $classname);
mysql_free_result($result);
return $obj;
}
function lookup_id($id, $table, $classname) {
return $this->lookup($table, $classname, "id=$id");
}
function enum_general($classname, $query) {
$result = $this->do_query($query);
if (!$result) return null;
$x = array();
while ($obj = mysql_fetch_object($result, $classname)) {
$x[] = $obj;
}
mysql_free_result($result);
return $x;
}
function enum_fields(
$table, $classname, $fields, $where_clause, $order_clause
) {
$x = array();
if ($where_clause) {
$where_clause = "where $where_clause";
}
$query = "select $fields from ".$this->db_name.".$table $where_clause $order_clause";
$result = $this->do_query($query);
if (!$result) return null;
$x = array();
while ($obj = mysql_fetch_object($result, $classname)) {
$x[] = $obj;
}
mysql_free_result($result);
return $x;
}
function enum($table, $classname, $where_clause=null, $order_clause=null) {
return self::enum_fields(
$table, $classname, '*', $where_clause, $order_clause
);
}
function update($obj, $table, $clause) {
$query = "update ".$this->db_name.".$table set $clause where id=$obj->id";
return $this->do_query($query);
}
function update_aux($table, $clause) {
$query = "update ".$this->db_name.".$table set $clause";
return $this->do_query($query);
}
function insert($table, $clause) {
$query = "insert into ".$this->db_name.".$table $clause";
return $this->do_query($query);
}
function delete($obj, $table) {
$query = "delete from ".$this->db_name.".$table where id=$obj->id";
return $this->do_query($query);
}
function delete_aux($table, $clause) {
$query = "delete from ".$this->db_name.".$table where $clause";
return $this->do_query($query);
}
function insert_id() {
return mysql_insert_id($this->db_conn);
}
function count($table, $clause) {
$query = "select count(*) as total from ".$this->db_name.".$table where $clause";
$result = $this->do_query($query);
$cnt = mysql_fetch_object($result);
mysql_free_result($result);
if ($cnt) return $cnt->total;
return null;
}
function replace($table, $clause) {
$query = "replace into ".$this->db_name.".$table set $clause";
return $this->do_query($query);
}
function base_escape_string($string) {
return mysql_real_escape_string($string);
}
function base_error() {
return mysql_error($this->db_conn);
}
function table_exists($table_name) {
$result = $this->do_query("show tables from ".$this->db_name." like '$table_name'");
$t = mysql_fetch_array($result);
mysql_free_result($result);
if ($t[0] == "$table_name") return true;
return false;
}
}
?>