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<?php
class ADEIDB {
var $dbh;
const MYSQL_ER_BAD_DB_ERROR = 1049;
const MYSQL_ER_NO_SUCH_TABLE = 1146;
const MYSQL_ER_DUP_ENTRY = 1062;
const MYSQL_ER_WRONG_VALUE_COUNT_ON_ROW = 1136;
const MYSQL_ER_SP_ALREADY_EXISTS = 1304;
const MYSQL_ER_BAD_FIELD_ERROR = 1054;
function __construct() {
global $ADEI_DB;
$this->dbh = $this->ConnectDB();
}
static function ConnectDB() {
global $ADEI_DB;
global $ADEI_CACHE_ENGINE;
$dbh = mysql_connect($ADEI_DB['host'] . ($ADEI_DB['port']?(":" . $ADEI_DB['port']):""), $ADEI_DB['user'], $ADEI_DB['password']);
if (!$dbh) throw new ADEIException(translate("Connection to the Caching MySQL Server is failed"));
mysql_query("SET sql_mode = ''", $dbh);
mysql_query("SET time_zone = '+0:00'", $dbh);
// We expect that INNODB is used if replication is on...
if (!strcasecmp($ADEI_CACHE_ENGINE, "MYISAM")) {
mysql_query("SET sql_log_bin = 0", $dbh);
}
// We don't need syncing even if INNODB and replication is used, re-caching couple of last minutes is completely fine
mysql_query("SET sync_binlog = 0", $dbh);
if (!@mysql_select_db($ADEI_DB['database'], $dbh)) {
// ER_NO_DB_ERROR
if (mysql_errno($dbh) == CACHEDB::MYSQL_ER_BAD_DB_ERROR) {
if (mysql_query("CREATE DATABASE IF NOT EXISTS " . $ADEI_DB['database'], $dbh)) {
if (!mysql_select_db($ADEI_DB['database'], $dbh))
throw new ADEIException(translate("Connection to the Caching MySQL Database is failed") . " (" . mysql_error($dbh) . ")");
self::CreateStoredProcedures($dbh);
} else
throw new ADEIException(translate("Creation of the caching MySQL database is failed") . " (" . mysql_error($dbh) . ")");
} else
throw new ADEIException(translate("Connection to the Caching MySQL Database is failed") . " (" . mysql_error($dbh) . ")");
}
return $dbh;
}
function CreateStoredProcedures($dbh = false) {
if (!$dbh) $dbh = $this->dbh;
/* The starting points of timestamps should be floating and should not
be referenced in other places of app */
$query = "CREATE FUNCTION ADEI_TIMESTAMP(unix_timestamp INT, ns INT) RETURNS BIGINT DETERMINISTIC RETURN unix_timestamp*1000000000+ns";
if ((!mysql_query($query, $dbh))&&(mysql_errno($dbh) != CACHEDB::MYSQL_ER_SP_ALREADY_EXISTS)) {
throw new ADEIException(translate("CACHE is not able to create stored procedure (%s), error: %s", "ADEI_TIMESTAMP", mysql_error($dbh)));
}
$query = "CREATE FUNCTION EXTENDED_UNIX_TIMESTAMP(dt DATETIME) RETURNS BIGINT DETERMINISTIC RETURN TIMESTAMPDIFF(SECOND, '1970-01-01 00:00:00', dt)";
if ((!mysql_query($query, $dbh))&&(mysql_errno($dbh) != CACHEDB::MYSQL_ER_SP_ALREADY_EXISTS)) {
throw new ADEIException(translate("CACHE is not able to create stored procedure (%s), error: %s", "EXTENDED_UNIX_TIMESTAMP", mysql_error($dbh)));
}
}
function LockCachingTable($table) {
mysql_query("LOCK TABLES $table WRITE");
}
function UnLockCache() {
mysql_query("UNLOCK TABLES");
}
function CreateTable($name, $spec) {
if (!@mysql_query("CREATE TABLE IF NOT EXIST `$name` ($spec)", $this->dbh)) {
throw new ADEIException(translate("Creation of system table (%s) within CACHE database is failed", $name) . " (" . mysql_error($this->dbh) . ")");
}
}
function AppendRecord($table, $values, $spec = false, $update = true) {
if (is_array($update)) {
$arr = array();
foreach ($update as $key => $col) {
array_push($arr, "`$col` = '{$values[$key]}'");
}
if ($arr) $update = " ON DUPLICATE KEY UPDATE " . implode(",", $arr) . "";
else $update = "";
} else $update = "";
$query = "INSERT INTO `$table` VALUES('" . implode("','", $values) . "')$update";
# echo $query . "\n";
if (!@mysql_query($query, $this->dbh)) {
switch (mysql_errno($this->dbh)) {
case CACHE::MYSQL_ER_NO_SUCH_TABLE:
if ($spec) {
$this->CreateTable($table, $spec);
if (@mysql_query($query, $this->dbh)) return;
} else {
throw new ADEIException(translate("Table (%s) is not found within CACHE database", $table));
}
break;
case CACHE::MYSQL_ER_DUP_ENTRY:
if ($update === false) return;
else if ($update === true) {
throw new ADEIException(translate("Record is already existing in the caching table (%s)", $table));
}
break;
}
throw new ADEIException(translate("Can not append entry into the caching table (%s), error: %s", $table, mysql_error($this->dbh)));
}
}
function DeleteRecord($table, $cond) {
$res = "DELETE FROM $table";
if (is_array($cond)) {
$conds = array();
foreach ($cond as $col => $value) {
if ($value === false) $value = 0;
array_push($conds, "`$col` = '$value'");
}
if ($conds) {
$res .= " WHERE (" . implode(") AND (", $conds) . ")";
}
} else if ($cond) $res .= " WHERE $cond";
# echo $res . "\n";
if (!@mysql_query($res, $this->dbh)) {
throw new ADEIException(translate("Can not delete entry from the caching table (%s), error: %s", $table, mysql_error($this->dbh)));
}
}
function Select($request) {
$res = @mysql_query($request, $this->dbh);
if (!$res) {
switch (mysql_errno($this->dbh)) {
case CACHE::MYSQL_ER_NO_SUCH_TABLE:
break;
default:
throw new ADEIException(translate("Can not query CACHE table, error") . ": " . mysql_error($this->dbh));
}
return array();
}
$list = array();
while ($row = mysql_fetch_row($res)) {
array_push($list, $row);
}
return $list;
}
function SelectRequest($table, $columns="*", array $req = NULL) {
$res = "SELECT ";
if (is_array($columns)) {
if (!$columns)
throw new ADEIException(translate("Select request is failed: column list is empty"));
$res .= "`" . implode("`,`", $columns) . "`";
} else $res .= $columns;
$res .= " FROM " . $table;
if ($req['condition']) $res = " WHERE " . $req['condition'];
else if (is_array($req['columns_equal'])) {
$conds = array();
foreach ($req['columns_equal'] as $col => $value) {
if ($value === false) $value = 0;
array_push($conds, "`$col` = '$value'");
}
if ($conds) {
$res .= " WHERE (" . implode(") AND (", $conds) . ")";
}
}
if ($req['group']) $res .= " GROUP BY " . $req['group'];
if ($req['order']) $res .= " ORDER BY " . $req['order'];
if ($req['limit']) $res .= " LIMIT " . $req['limit'];
return $this->Select($res);
}
}
?>
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