--- /dev/null
+<?
+/**Abstract base class for database engines*/
+abstract class DbEngine
+{
+ /**passcode for admin.php*/
+ private $adminpass=false;
+ private $adminuser=false;
+
+ /**transaction RO/RW mode: false=assume readonly, true=assume inserts/updates*/
+ protected $transmode=false;
+
+ //public function __construct();
+
+ /**connect to the database, must be overwritten by DB driver*/
+ public abstract function tryConnect();
+
+ /**set the admin passcode*/
+ public function setAdminPassCode($u,$p)
+ {
+ $this->adminuser=$u;
+ $this->adminpass=$p;
+ }
+
+ /**check admin credentials*/
+ public function checkAdmin()
+ {
+ global $_SERVER;
+ if(!$this->canAdministrate())return false;
+ if(!isset($_SERVER["PHP_AUTH_USER"]) || !isset($_SERVER["PHP_AUTH_PW"])){
+ return false;
+ }
+ return $_SERVER["PHP_AUTH_USER"]==$this->adminuser && $_SERVER["PHP_AUTH_PW"]==$this->adminpass;
+ }
+
+ /**returns whether a passcode is known and admin.php may be used*/
+ public function canAdministrate()
+ {
+ return $this->adminpass!==false && $this->adminuser!==false;
+ }
+
+ /**returns the version of the DB layout that is required by this version of Magic Smoke*/
+ public function needVersion()
+ {
+ global $dbScheme;
+ return $dbScheme->version();
+ }
+
+ /**returns whether the table exists; must be implemented by driver*/
+ public abstract function hasTable($tablename);
+
+ /**begins a transaction; must be implemented by driver; use sqlBeginTransaction to create the SQL statement!*/
+ public abstract function beginTransaction();
+
+ /**ends a transaction successfully; must be implemented by driver; returns true on success; use sqlCommitTransaction to create the SQL statement!*/
+ public abstract function commitTransaction();
+
+ /**ends a transaction with a rollback; must be implemented by driver; returns true on success; use sqlRollbackTransaction to create the SQL statement!*/
+ public abstract function rollbackTransaction();
+
+ /**locks the database - only used by the backup functions; if necessary should also start a transaction; default just starts a transaction*/
+ protected function lockDB($writelock){$this->beginTransaction();}
+
+ /**unlocks the database - only used by the backup functions; if necessary should also commit a transaction; default just commits*/
+ protected function unlockDB(){$this->commitTransaction();}
+
+ /**gets some data from the database; $table is the name of the table, $cols is the list of columns to return or "*" for all, $where is the where clause of the SQL-statement, $orderby may contain additional ORDER BY or GROUP BY clauses; returns array of rows, which are in *_fetch_array format; returns false on error; use sqlSelect to create the SQL statement!; make sure that NULL values are returned as PHP value null (most DB drivers already do this)*/
+ public abstract function select($table,$cols,$where="",$orderby="");
+
+ /**insert values into a table; returns false on failure, the new primary key if a sequence was set, true otherwise; use sqlInsert to create the SQL statement!*/
+ public abstract function insert($table,array $values);
+
+ /**update database values; returns how many rows have been changed or false for failure; use sqlUpdate to create the SQL statement!*/
+ public abstract function update($table,array $values,$where);
+
+ /**delete database values; returns the amount of rows deleted or false if an error occurred; use sqlDelete to create the SQL statement!*/
+ public abstract function deleteRows($table,$where);
+
+ /**creates a table; the argument is an array of the form "col-name" => array("col-type", "flags"...); use sqlCreateTable() etc. to create the actual statement*/
+ protected abstract function createTable($tablename,$table);
+
+ /**transform an internally used table name to the actual table name in the DB; the default implementation returns exactly what it gets*/
+ protected function tableName($tname){return $tname;}
+
+ /**returns the correct type name for the required abstract data type;
+ types that must be understood are: int32 (INTEGER), int64 (LONG INTEGER), seq32 (auto-incrementing int), seq64, bool (boolean), string:$length (text up to 255 chars, length is optional, default is 255; VARCHAR($length)), text (unlimited text)*/
+ protected function dataType($type)
+ {
+ if($type=="int32"||$type=="enum"||$type=="enum32")return "INTEGER";
+ if($type=="int64"||$type=="enum64")return "LONG INTEGER";
+ if($type=="bool")return "BOOLEAN";
+ $tpa=explode(":",$type);
+ if($tpa[0]=="string"){
+ if(isset($tpa[1]))
+ return "VARCHAR(".$tpa[1].")";
+ else
+ return "VARCHAR(255)";
+ }
+ return false;
+ }
+
+ /**returns the correct name/coding of a flag:
+ primarykey, notnull, unique (implies notnull), foreignkey:$table:$col, defaultint:$val, defaultstr:$val, index*/
+ protected function columnFlag($flag,$col,$table)
+ {
+ if($flag=="primarykey")return "PRIMARY KEY";
+ if($flag=="null")return "NULL";
+ if($flag=="notnull")return "NOT NULL";
+ if($flag=="unique")return "NOT NULL UNIQUE";
+ if($flag=="index")return "INDEX";
+ $tpa=explode(":",$flag);
+ if($tpa[0]=="foreignkey"){
+ if(count($tpa)<3)
+ return false;
+ return "REFERENCES ".$this->tableName($tpa[1])."($tpa[2])";
+ }
+ if($tpa[0]=="defaultint"){
+ if(count($tpa)<2)
+ return "DEFAULT NULL";
+ return "DEFAULT $tpa[1]";
+ }
+ if($tpa[0]=="defaultstr"){
+ if(count($tpa)<2)
+ return "DEFAULT NULL";
+ return "DEFAULT ".$this->escapeString($tpa[1]);
+ }
+ if($tpa[0]=="defaultbool"){
+ if(count($tpa)<2)
+ return "DEFAULT NULL";
+ return "DEFAULT ".$this->escapeBool($tpa[1]);
+ }
+ if($tpa[0]=="default"){
+ if(count($tpa)<2)
+ return "DEFAULT NULL";
+ return "DEFAULT ".$this->escapeColumn($table,$col,$tpa[1]);
+ }
+ }
+
+ /**creates a SQL92 statement for creating a table; overwrite this to implement DB specific syntax*/
+ protected function sqlCreateTable($tablename,$table)
+ {
+ $ret="CREATE TABLE ".$this->tableName($tablename)." (";
+ $cm="";
+ reset($table);
+ while(list($col,$def)=each($table)){
+ $ret.=$cm;$cm=",";
+ //check whether this is a special column
+ if(substr($col,0,1)==":"){
+ if($col==":primarykey")$ret.=$this->sqlCreateTablePrimaryKey($def);
+ else die("Unknown special column ".$col." while creating table ".$tablename);
+ }else{
+ //column name
+ $ret.=$col." ";
+ //get type
+ $ret.=$this->dataType($def[0])." ";
+ //get flags
+ for($i=0;$i<count($def);$i++)
+ $ret.=$this->columnFlag($def[$i],$col,$tablename)." ";
+ }
+ }
+ $ret.=$this->createTableExtras($tablename,$table);
+ $ret.=")";
+ return $ret;
+ }
+
+ /**This function can be used to amend the column definitions of a table; if overwritten it must return a string; overwrite this to implement DB specific syntax*/
+ protected function createTableExtras($tablename,$table)
+ {
+ return "";
+ }
+
+ /**creates primary key statement for sqlCreateTable; overwrite this to implement DB specific syntax*/
+ protected function sqlCreateTablePrimaryKey(array $cols)
+ {
+ $ret="PRIMARY KEY(";
+ for($i=0;$i<count($cols);$i++){
+ if($i>0)$ret.=",";
+ $ret.=$cols[$i];
+ }
+ $ret.=")";
+ return $ret;
+ }
+
+ /**creates a SQL92 statement for selects; overwrite this to implement DB specific syntax; the concrete DB implementation should append "for update" to the select statement if $this->transmode is true and the DB supports it*/
+ public function sqlSelect($table,$cols,$where,$orderby)
+ {
+ $query="SELECT $cols FROM ".$this->tableName($table);
+ if($where!="")$query.=" WHERE ".$where;
+ if($orderby!="")$query.=" ".$orderby;
+ return $query;
+ }
+
+ /**creates a SQL92 statement for inserts; overwrite this to implement DB specific syntax*/
+ protected function sqlInsert($table,array $values)
+ {
+ global $dbScheme;
+ $ret="INSERT INTO ".$this->tableName($table)." (";
+ reset($values);
+ $cm="";
+ $val=") VALUES (";
+ while(list($k,$v)=each($values)){
+ //make sure the column exists, ignore the riff-raff
+ if(!$dbScheme->tableHasColumn($table,$k))continue;
+ $ret.=$cm;$val.=$cm;$cm=",";
+ //append column name
+ $ret.=$k;
+ //append value
+ if($dbScheme->isIntColumn($table,$k))
+ $val.=$this->escapeInt($v);
+ else
+ if($dbScheme->isStringColumn($table,$k))
+ $val.=$this->escapeString($v);
+ else
+ if($dbScheme->isBlobColumn($table,$k))
+ $val.=$this->escapeBlob($v);
+ else
+ if($dbScheme->isBoolColumn($table,$k))
+ $val.=$this->escapeBool($v);
+ else
+ //don't know how to escape it...
+ $val.="NULL";
+ }
+ $ret.=$val.")";
+// print $ret;
+ return $ret;
+ }
+
+ /**creates a SQL92 statement for deletes; overwrite this to implement DB specific syntax*/
+ protected function sqlDelete($table,$where)
+ {
+ return "DELETE FROM ".$this->tableName($table)." WHERE ".$where;
+ }
+
+ /**creates a SQL92 statement for updates; overwrite this to implement DB specific syntax*/
+ protected function sqlUpdate($table,array $values,$where)
+ {
+ global $dbScheme;
+ $ret="UPDATE ".$this->tableName($table)." SET ";
+ reset($values);
+ $cm="";
+ while(list($k,$v)=each($values)){
+ //make sure the column exists, ignore the riff-raff
+ if(!$dbScheme->tableHasColumn($table,$k))continue;
+ $ret.=$cm;$cm=",";
+ //append column name
+ $ret.=$k."=";
+ //append value
+ if($dbScheme->isIntColumn($table,$k))
+ $ret.=$this->escapeInt($v);
+ else
+ if($dbScheme->isStringColumn($table,$k))
+ $ret.=$this->escapeString($v);
+ else
+ if($dbScheme->isBlobColumn($table,$k))
+ $ret.=$this->escapeBlob($v);
+ else
+ if($dbScheme->isBoolColumn($table,$k))
+ $ret.=$this->escapeBool($v);
+ else
+ //don't know how to escape it...
+ $ret.="NULL";
+ }
+ $ret.=" WHERE ".$where;
+ //print $ret;
+ return $ret;
+ }
+
+ /**returns the SQL92 statement for beginning a transaction; overwrite this to implement DB specific syntax*/
+ public function sqlBeginTransaction()
+ {
+ return "BEGIN TRANSACTION";
+ }
+
+ /**returns the SQL92 statement for committing a transaction; overwrite this to implement DB specific syntax*/
+ public function sqlCommitTransaction()
+ {
+ return "COMMIT TRANSACTION";
+ }
+
+ /**returns the SQL92 statement for rolling a transaction back; overwrite this to implement DB specific syntax*/
+ public function sqlRollbackTransaction()
+ {
+ return "ROLLBACK TRANSACTION";
+ }
+
+ /**escapes integers; the default implementation just makes sure it is an int (false and null are translated to NULL)*/
+ public function escapeInt($i)
+ {
+ if($i === false || $i === null)return "NULL";
+ return round($i + 0);
+ }
+
+ /**escapes a list of integers; uses escapeInt for each element; automatically adds parentheses*/
+ public function escapeIntList(array $il)
+ {
+ $r="(";
+ $b=false;
+ foreach($il as $i){
+ if($b)$r.=",";
+ else $b=true;
+ $r.=$this->escapeInt($i);
+ }
+ $r.=")";
+ return $r;
+ }
+
+ /**escapes strings; the default uses addslashes and encloses the value in ''; it is recommended to overwrite this with the proper escaping procedure for the target DB (false and null are translated to NULL)*/
+ public function escapeString($s)
+ {
+ if($s === false || $s === null) return "NULL";
+ return "'".addslashes($s)."'";
+ }
+
+ /**escapes blobs; the default uses addslashes and encloses the value in ''; it is recommended to overwrite this with the proper escaping procedure for the target DB*/
+ public function escapeBlob($s)
+ {
+ if($s === false || $s===null) return "NULL";
+ return "'".addslashes($s)."'";
+ }
+
+ /**escapes a boolean value; the default translates 0, '0', 'f', 'false', 'n', 'no', false to FALSE and numerics !=0, 't', 'true', 'y', 'yes', true to TRUE; any other value (incl. the PHP constant null) is translated to NULL*/
+ public function escapeBool($s)
+ {
+ if($s===null)return "NULL";
+ if(is_numeric($s)){
+ if(($s+0)!=0)return "TRUE";
+ else return "FALSE";
+ }
+ if($s===false)return "FALSE";
+ if($s===true)return "TRUE";
+ switch(strtolower($s)){
+ case "t":case "true":case "yes":case "y":
+ return "TRUE";
+ case "f":case "false":case "n":case "no":
+ return "FALSE";
+ default:
+ return "NULL";
+ }
+ }
+
+ /**generic escape routine: queries the schema for the correct escape mechanism and then returns the appropriately escaped value*/
+ public function escapeColumn($table,$col,$val)
+ {
+ global $dbScheme;
+ if($dbScheme->isIntColumn($table,$col))return $this->escapeInt($val);
+ if($dbScheme->isStringColumn($table,$col))return $this->escapeString($val);
+ if($dbScheme->isBlobColumn($table,$col))return $this->escapeBlob($val);
+ if($dbScheme->isBoolColumn($table,$col))return $this->escapeBool($val);
+ //fallback: NULL
+ return "NULL";
+ }
+
+ /**returns a configuration setting*/
+ public function getConfig($key)
+ {
+ $mar=$this->select("config","cval","ckey=".$this->escapeString($key));
+ if(count($mar)>0)return $mar[0][0];
+ return false;
+ }
+
+ /**sets a config setting*/
+ public function setConfig($key,$val)
+ {
+ $this->beginTransaction();
+ $mar=$this->select("config","cval","ckey=".$this->escapeString($key));
+ if(count($mar)>0)$this->update("config",array("cval"=>$val),"ckey=".$this->escapeString($key));
+ else $this->insert("config",array("ckey"=>$key,"cval"=>$val));
+ $this->commitTransaction();
+ }
+
+ /**tries to find out whether the connected DB version is usable*/
+ public function canUseDb()
+ {
+ if(!$this->hasTable("config"))
+ return false;
+ return $this->getConfig("MagicSmokeVersion")==$this->needVersion();
+ }
+
+ /**creates the database, used by admin.php only!!*/
+ public function createDb()
+ {
+ global $dbScheme;
+ $this->beginTransaction();
+ //iterate DB schema and create tables
+ $tabs=$dbScheme->tableNames();
+ for($i=0;$i<count($tabs);$i++){
+ //create table
+ if(!$this->createTable($tabs[$i],$dbScheme->tableDefinition($tabs[$i]))){
+ print("DB Error while creating ".$tabs[$i].": ".$this->lastError()."<p>\n");
+ print("Last statement was: ".$this->sqlCreateTable($tabs[$i],$dbScheme->tableDefinition($tabs[$i]))."<p>\n");
+ $this->rollbackTransaction();
+ die("Unable to create database.");
+ }
+ //insert defaults
+ foreach($dbScheme->tableDefaults($tabs[$i]) as $def){
+ $this->insert($tabs[$i],$def);
+ }
+ }
+ //close transaction
+ $this->commitTransaction();
+ }
+
+ /**shows how the database would be created, used by admin.php only!!*/
+ public function showCreateDb()
+ {
+ global $dbScheme;
+ print("<h3>Database Creation SQL Script</h3>\n<pre>\n");
+ print(htmlentities($this->sqlBeginTransaction()).";\n");
+ //iterate DB schema and create tables
+ $tabs=$dbScheme->tableNames();
+ for($i=0;$i<count($tabs);$i++){
+ //create table
+ print(htmlentities($this->sqlCreateTable($tabs[$i],$dbScheme->tableDefinition($tabs[$i]))).";\n");
+ //insert defaults
+ foreach($dbScheme->tableDefaults($tabs[$i]) as $def){
+ print(htmlentities($this->sqlInsert($tabs[$i],$def)).";\n");
+ }
+ }
+ //close transaction
+ print(htmlentities($this->sqlCommitTransaction()).";\n</pre>\n");
+ }
+
+ /**returns the error string of the last operation*/
+ public abstract function lastError();
+
+ /**returns whether the result value is NULL; the default interprets only the special value null as NULL*/
+ public function isNull($val)
+ {
+ if($val===null)return true;
+ else return false;
+ }
+
+ /**returns whether the DB driver currently believes to be in RW transaction mode*/
+ public function transactionIsUpdating()
+ {
+ return $this->transmode;
+ }
+
+ /**set the transaction mode: true if it is an updating transaction*/
+ public function setTransactionUpdating($tm)
+ {
+ $this->transmode=$tm!=false;
+ }
+
+ /**helper: encode backup data for transport*/
+ private function escapeBackup($tab,$col,$val)
+ {
+ //check for NULL
+ if($this->isNull($val))return "NULL NULL";
+ //get type
+ global $dbScheme;
+ if($dbScheme->isIntColumn($tab,$col))return "int ".($val+0);
+ if($dbScheme->isBoolColumn($tab,$col)){
+ if($val)return "bool 1";
+ else return "bool 0";
+ }
+ //string and blob are base64 encoded
+ return "str ".base64_encode($val);
+ }
+
+ /**dump a backup (returned as string)*/
+ public function dumpBackup()
+ {
+ global $dbScheme;
+ //make sure nobody else can disturb us (read lock)
+ $this->lockDB(false);
+ //dump basic stuff
+ $ret="startbackup\n";
+ $ret.="backupversion 0\n";
+ $ret.="dbversion ".$dbScheme->version()."\n";
+ //go through backup tables
+ foreach($dbScheme->backupTables() as $tab){
+ $ret.="table ".$tab."\n";
+ //get columns
+ $cols=$dbScheme->tableColumns($tab);
+ //go through rows
+ $res=$this->select($tab,"*","1=1");
+ foreach($res as $row){
+ foreach($cols as $col){
+ $val=$row[$col];
+ $ret.="value $col ".$this->escapeBackup($tab,$col,$val)."\n";
+ }
+ $ret.="insert\n";
+ }
+ }
+ $ret.="endofbackup\n";
+ //release lock & commit
+ $this->unlockDB();
+
+ return $ret;
+ }
+
+ /**helper: decode backup data from transport format*/
+ private function unescapeBackup($fmt,$val)
+ {
+ switch($fmt){
+ case "NULL":return null;
+ case "int":return $val+0;
+ case "str":return base64_decode($val);
+ case "bool":return $val+0;
+ default:
+ print("Warning: encountered unknown data encoding \"".htmlspecialchars($fmt)."\". Using NULL instead.<br>\n");
+ return null;
+ }
+ }
+
+ /**helper: inserts data from backup*/
+ private function backupInsert($table,$data,$overwrite)
+ {
+ global $dbScheme;
+ //get primary keys
+ $pk=$dbScheme->primaryKeyColumns($table);
+ //scan whether data is existent
+ $pks="";$q="";
+ foreach($pk as $p){
+ if($pks!="")$pks.=",";
+ $pks.=$p;
+ if($q!="")$q.=" AND ";
+// print("pk $p ");
+ $q.=$p."=".$this->escapeColumn($table,$p,$data[$p]);
+ }
+// print("pk=$pks q=$q<br>");
+ $res=$this->select($table,$pks,$q);
+ if(count($res)>0){
+ if($overwrite){
+ $b=$this->update($table,$data,$q);
+ print("update data: ".($b===false?"failed":"success")."<br>\n");
+ }else{
+ print("ignoring existing row<br>\n");
+ }
+ }else{
+ $b=$this->insert($table,$data);
+ print("insert data: ".($b===false?"failed":"success")."<br>\n");
+ }
+ }
+
+ /**called from admin.php: restore a backup*/
+ public function restoreData($file,$overwrite)
+ {
+ //prep
+ $this->lockDB(true);
+ $data=array();
+ $table="";
+ //open file
+ $fd=fopen($file,"r");
+ while(!feof($fd)){
+ $line=trim(fgets($fd));
+ if($line=="")continue;
+ $cmd=explode(" ",$line);
+ switch($cmd[0]){
+ case "startbackup":
+ case "backupversion":
+ case "dbversion":
+ /*currently ignored, maybe we do something with it later*/
+ break;
+ case "endofbackup":
+ print("Reached End of Backup.<br>\n");
+ break 2;
+ case "table":
+ $data=array();
+ $table=$cmd[1];
+ if(!$this->hasTable($table)){
+ print("Switching to non-existing table ".htmlspecialchars($table)." - ignoring data that follows.<br>\n");
+ $table="";
+ }else
+ print("Switching to table ".htmlspecialchars($table)."<br>\n");
+ break;
+ case "value":
+ $data[$cmd[1]]=$this->unescapeBackup($cmd[2],$cmd[3]);
+ break;
+ case "insert":
+ if($table==""){
+ print("Warning: insert on non-existing table, ignoring data.<br>\n");
+ }else{
+ $this->backupInsert($table,$data,$overwrite);
+ }
+ break;
+ default:
+ print("Warning: unknown statement \"".htmlspecialchars($cmd[0])."\" in backup file. Ignoring it.<br>\n");
+ break;
+ }
+ }
+ fclose($fd);
+ $this->unlockDB();
+ }
+
+
+ /**creates a log entry, the array must supply values for the moneylog table; time, username are generated automatically, the log entry is delivered via the second argument*/
+ public function mkLog(array $vals,$logtext)
+ {
+ global $session;
+ $vals["logtime"]=time();
+ $vals["uname"]=$session->getUser();
+ $vals["log"]=$logtext;
+ $this->insert("moneylog",$vals);
+ }
+};
+
+?>
\ No newline at end of file
--- /dev/null
+<?
+/**MySQL adaptation of DB-Engine*/
+class MysqlEngine extends DbEngine
+{
+ /**prefix for table names*/
+ protected $prefix="";
+
+ private $user;
+ private $server;
+ private $pass;
+ private $dbhdl=false;
+ private $dbname="";
+ private $engine="InnoDB";
+ private $charset="utf8";
+ private $intrans=false;
+ //used for table creation to work around mysql bugs
+ private $tableappend;
+
+ /**initialize driver*/
+ public function __construct($server,$user,$pass)
+ {
+ $this->user=$user;
+ $this->server=$server;
+ $this->pass=$pass;
+ }
+
+ /**make sure it shuts down*/
+ public function __destruct()
+ {
+ //fail on the side of caution: roll back unless already released
+ if($this->intrans)
+ @$this->rollbackTransaction();
+ }
+
+ /**set a table-name prefix for the database*/
+ public function setPrefix($pre)
+ {
+ $this->prefix=$pre;
+ }
+
+ /**set the name of the database to be used*/
+ public function setDbName($dbn)
+ {
+ $this->dbname=$dbn;
+ }
+
+ /**set the name of the storage engine to be used on DB creation*/
+ public function setStorageEngine($e)
+ {
+ $this->engine=$e;
+ }
+
+ /**set the default charset for tables and connections*/
+ public function setCharacterSet($c)
+ {
+ $this->charset=$c;
+ }
+
+ public function tryConnect()
+ {
+ //connect
+ $this->dbhdl=mysqli_connect($this->server,$this->user,$this->pass,$this->dbname);
+ if($this->dbhdl===false)
+ die("Unable to connect to database system. Giving up.");
+ //select Unicode; TODO: fix it to be configurable
+ if(mysqli_query($this->dbhdl,"SET NAMES 'utf8'")===false)
+ die("Cannot set DB character set to utf-8, aborting.");
+ //make sure the DB is transaction safe
+ if(mysqli_query($this->dbhdl,"SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE")===false)
+ die("Cannot make this database transaction safe, aborting");
+ }
+
+ public function hasTable($tnm)
+ {
+ global $dbScheme;
+ if(!$dbScheme->hasTable($tnm))return false;
+ $res=mysqli_query($this->dbhdl,"select * from ".$this->tableName($tnm)." where 1=2");
+ if($res===false)return false;
+ mysqli_free_result($res);
+ return true;
+ }
+ public function beginTransaction()
+ {
+ $this->intrans=mysqli_query($this->dbhdl,$this->sqlBeginTransaction());
+ return $this->intrans;
+ }
+
+ public function commitTransaction()
+ {
+ if(!$this->intrans)return false;
+ //otherwise commit
+ $this->intrans=false;
+ return mysqli_query($this->dbhdl,$this->sqlCommitTransaction());
+ }
+
+ public function rollbackTransaction()
+ {
+ $this->intrans=false;
+ //don't ask, just do (also catches implicit transactions)
+ return mysqli_query($this->dbhdl,$this->sqlRollbackTransaction());
+ }
+
+ protected function lockDB($wl)
+ {
+ global $dbScheme;
+ $req="SET autocommit = 0 ; LOCK TABLES ";
+ $i=0;
+ foreach($dbScheme->backupTables() as $tab){
+ if($i)$req.=",";
+ $i++;
+ $req.=$this->tableName($tab);
+ if($wl)$req.=" WRITE";
+ else $req.=" READ";
+ }
+ mysqli_query($this->dbhdl,$req);
+ }
+
+ protected function unlockDB()
+ {
+ mysqli_query($this->dbhdl,"UNLOCK TABLES");
+ }
+
+ public function sqlBeginTransaction(){return "BEGIN";}
+
+ public function sqlCommitTransaction(){return "COMMIT";}
+
+ public function sqlRollbackTransaction(){return "ROLLBACK";}
+
+
+ public function select($table,$cols,$where="",$orderby="")
+ {
+ $query=$this->sqlSelect($table,$cols,$where,$orderby);
+ if($this->transmode)$query.=" FOR UPDATE";
+ $res=mysqli_query($this->dbhdl,$query);
+ if($res===false)return false;
+ $nr=mysqli_num_rows($res);
+ $ret=array();
+ for($i=0;$i<$nr;$i++){
+ $ret[]=mysqli_fetch_array($res,MYSQLI_BOTH);
+ }
+ mysqli_free_result($res);
+ return $ret;
+ }
+
+ protected function createTable($tn,$t)
+ {
+ $sql=$this->sqlCreateTable($tn,$t);
+ return mysqli_query($this->dbhdl,$sql);
+ }
+
+ protected function sqlCreateTable($tn,$t)
+ {
+ $this->tableappend="";
+ $sql=parent::sqlCreateTable($tn,$t)." engine=".$this->engine." default charset=".$this->charset;
+// print("<pre>\n$sql\n</pre>\n");
+ return $sql;
+ }
+
+ protected function createTableExtras($tablename,$table)
+ {
+ //warning: this is rather dangerous, but safe at the moment since there is only
+ // one user of this function
+ return $this->tableappend;
+ }
+
+ protected function tableName($tn)
+ {
+ return $this->prefix.$tn;
+ }
+
+ protected function dataType($type)
+ {
+ if($type=="int32"||$type=="enum"||$type=="enum32")return "INT";
+ if($type=="int64"||$type=="enum64")return "BIGINT";
+ if($type=="seq32")return "INT AUTO_INCREMENT";
+ if($type=="seq64")return "BIGINT AUTO_INCREMENT";
+ if($type=="text")return "TEXT";
+ if($type=="blob")return "MEDIUMBLOB"; //max.16MB of blob
+ $tpa=explode(":",$type);
+ if($tpa[0]=="string"){
+ if(isset($tpa[1]))
+ return "VARCHAR(".$tpa[1].")";
+ else
+ return "VARCHAR(255)";
+ }
+ //fallback to SQL standard
+ return parent::dataType($type);
+ }
+
+ protected function columnFlag($flag,$col,$table)
+ {
+ //MySQL does not mark columns for indexing directly, instead the index is appended to the table definition
+ if($flag=="index"){
+ $this->tableappend.=", INDEX(".$col.")";
+ return "";
+ }
+ //MySQL::InnoDB is buggy, it accepts references only as appendix
+ $tpa=explode(":",$flag);
+ if($tpa[0]=="foreignkey"){
+ if(count($tpa)<3)
+ return false;
+ $this->tableappend.=", FOREIGN KEY (".$col.") REFERENCES ".$this->tableName($tpa[1])."($tpa[2])";
+ return "";
+ }
+ //fallback to SQL standard
+ return parent::columnFlag($flag,$col,$table);
+ }
+
+ public function insert($table,array $values)
+ {
+ $this->transmode=true;
+ $res=mysqli_query($this->dbhdl,$this->sqlInsert($table,$values));
+ if($res===false)return false;
+ global $dbScheme;
+ $seq=$dbScheme->hasSequence($table);
+ if($seq!==false){
+ if(isset($values[$seq]))return $values[$seq];
+ $res=mysqli_query($this->dbhdl,"select LAST_INSERT_ID()");
+ if(mysqli_num_rows($res)>0){
+ $row=mysqli_fetch_array($res);
+ $ret=$row[0];
+ }else{
+ $ret=true;
+ }
+ mysqli_free_result($res);
+ return $ret;
+ }else{
+ return true;
+ }
+ }
+
+ public function update($table,array $values,$where)
+ {
+ $this->transmode=true;
+ $res=mysqli_query($this->dbhdl,$this->sqlUpdate($table,$values,$where));
+ if($res!==false)return mysqli_affected_rows($this->dbhdl);
+ else return false;
+ }
+
+ public function deleteRows($table,$where)
+ {
+ $this->transmode=true;
+ $b=mysqli_query($this->dbhdl,$this->sqlDelete($table,$where));
+// echo mysqli_error($this->dbhdl);
+ if($b!==false)return mysqli_affected_rows($this->dbhdl);
+ else return false;
+ }
+
+ public function lastError()
+ {
+ return mysqli_error($this->dbhdl);
+ }
+
+ /**escapes strings; it uses mysqli_escape_string and encloses the value in ''*/
+ public function escapeString($s)
+ {
+ if($s === false||$s===null) return "NULL";
+ return "'".mysqli_real_escape_string($this->dbhdl,$s)."'";
+ }
+
+ /**escapes blobs; it uses mysqli_escape_string and encloses the value in '' - blobs are binary strings in MySQL*/
+ public function escapeBlob($s)
+ {
+ if($s === false||$s===null) return "NULL";
+ return "'".mysqli_real_escape_string($this->dbhdl,$s)."'";
+ }
+
+ /**escapes booleans, overwrites the orignal to use "0" and "1" instead of "FALSE" and "TRUE"*/
+ public function escapeBool($b)
+ {
+ $r=DbEngine::escapeBool($b);
+ if($r=="TRUE")return "1";
+ if($r=="FALSE")return "0";
+ return $r;
+ }
+};
+
+?>
\ No newline at end of file
projects / konrad/pack.git / commitdiff