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db.php
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<?php
/**
* @copyright Copyright (C) 2010 Nadir Boussoukaia. All rights reserved.
*/
class Inducido {
public static $Path_To_Data=".";
public static $project_name_tech="reservation";
}
function die_fatal_error($message)
{
die($message);
}
function add2statusbar($msg, array $values = NULL,$category= NULL) //info
{
echo empty($values) ? $string : strtr($string, $values);
}
function add2statusbarKO($msg, array $values = NULL,$category= NULL) //failed
{
echo empty($values) ? $string : strtr($string, $values);
}
function add2statusbarOK($msg, array $values = NULL,$category= NULL) //success
{
echo empty($values) ? $string : strtr($string, $values);
}
//----------------------------------------------------------------------
class DB
//----------------------------------------------------------------------
{
/* connexion à la base de donnée */
private static $db_init_called=false;
private static $lastSQL="";
private static $dbHandle="";
private static $dburl=null;
private static $typeDb='sqlite';
private static $instance;
public static $db_server = '127.0.0.1';
public $db_port = '5984';
public static function instance($typeDb='sqlite',$dsn=null) {
if (!isset(self::$instance)) {
self::$instance = new DB($typeDb,$dsn);
}
return self::$instance;
}
// realise la connexion a la base de donnees
public static function init()
{
//lazy connect (on first sql call)
if(DB::$db_init_called) return;
DB::$db_init_called=true;
//TODO faire mieux
$ext_names=get_loaded_extensions();
if (!in_array('PDO',$ext_names))
die('no PDO extension');
self::$typeDb='sqlite';
//$typeDb='mysql';
//voir pour les URL: http://php.developpez.com/faq/?page=pdo#pdo-connect
//[PDO::getAvailableDrivers] array ( 0 => 'mysql', 1 => 'sqlite', 2 => 'sqlite2', )
switch(self::$typeDb)
{
case 'sqlite':
if (!in_array('sqlite',PDO::getAvailableDrivers()))
die('<pre>No SQLITE PDO extension<br>'.print_r(PDO::getAvailableDrivers(),true));
$username="";
$password="";
self::$dburl='sqlite:'.Inducido::$Path_To_Data.'/'.strtolower(Inducido::$project_name_tech).'.db3';
$driver_options= null;
break;
default:
die("non géré");
}
try{
//__construct ( string $dsn [, string $username [, string $password [, array $driver_options ]]] )
DB::$dbHandle = new PDO(self::$dburl,$username,$password,$driver_options);
//PDO doit gerer les erreurs sous forme d'exception
DB::$dbHandle->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
// les noms de champs seront en caractères minuscules
DB::$dbHandle->setAttribute(PDO::ATTR_CASE, PDO::CASE_LOWER);
}catch(PDOException $e){
//ici si PDO ne trouve pas le fichier, il faut afficher le message!!!
//$msg = 'ERREUR PDO dans ' . $e->getFile() . ' L.' . $e->getLine() . ' : ' . $e->getMessage();
DB::$dbHandle=null;
add2statusbarKO("[PDO ERROR: {msg}]",array('{msg}'=>$e->getMessage()),'core' );
add2statusbarKO("At {pos}",array('{pos}'=>get_caller_position()),'core' );
die_fatal_error("ERROR on database access");
}
}
private static function _SQLquote($val)
{
return "'".str_replace("'" , "''", $val)."'";
}
public static function quote($field)
{
// if(empty($field)) sinon empeche les valeur 0!
// if($field==null || trim($field)=="")
// return $field;
DB::init();
if(!isset(DB::$dbHandle)) return DB::_SQLquote($field);
else return DB::$dbHandle->quote($field) ;
}
//----------------------------------------------------------------------
public static function query_single_row($sql)
{
$result = DB::_internal_query($sql);
if($result)
{
$rowdata=$result->fetch();
return $rowdata;
}
return null;
}
//----------------------------------------------------------------------
/*devrait renvoyer un tableau */
public static function query_all($sql)
{
$result = DB::_internal_query($sql);
if($result)
{
$rowdata=$result->fetchAll();
return $rowdata;
}
return array();
}
//----------------------------------------------------------------------
public static function query_single_field($sql, $defaultvalue=null)
{
$result = DB::_internal_query($sql);
if($result)
{
$field=$result->fetchColumn();
return $field;
}
else
if($defaultvalue)
return $defaultvalue;
return null;
}
//----------------------------------------------------------------------
/**
* execute un ordre DML - initialisation connexion si besoin
*
* @param mixed $sql
* @return PDO:resultset or false or number of affected rowss
*/
public static function query($sql)
{
return self::_internal_query($sql);
}
//----------------------------------------------------------------------
/**
* execute un ordre DML - initialisation connexion si besoin
*
* @param mixed $sql
* @return PDO:resultset or false or number of affected rowss
*/
private static function _internal_query($sql,$depth_add=0)
{
if(empty($sql))
throw new Exception("Error: empty SQL");
//lazy connect (on first sql call)
if(!DB::$db_init_called)
DB::init();
if(DB::$dbHandle==null)
return null;
DB::$lastSQL=$sql;
try {
if( strtolower(substr(trim($sql),0,strlen("select")))=="select")
//query() retourne un jeu de résultats sous la forme d'un objet PDOStatement
{
$result = DB::$dbHandle->query($sql);
if($result) $result->setFetchMode(PDO::FETCH_ASSOC);
}
else
//exec() retourne uniquement le nombre de lignes affectées.
$result = DB::$dbHandle->exec($sql);
//todo $result possede une propriété queryString = le SQL
if($result===FALSE)
self::showDBError(DB::$dbHandle,$sql);
} catch (PDOException $e) {
echo " [SQL ERROR: ".$e->getMessage()."']"." -->".$sql;
return false;
}
return $result;
}
///----------------------------------------------------------------------
static function lastInsertId()
{
if(DB::$dbHandle!=null)
{
$newid=DB::$dbHandle->lastInsertId();
return $newid;
}
return -1;
}
///----------------------------------------------------------------------
static function rowCount()
{
if(DB::$dbHandle!=null)
return DB::$dbHandle->rowCount();
return 0;
}
///----------------------------------------------------------------------
//todo devenue obsolete?? avec le catch?
function showDBError($dbHandle,$sql="")
{
if($dbHandle!=null)
{
$err=$dbHandle->errorInfo();
if($err!=null && count($err)>=2)
{
add2statusbarKO("[ERREUR SQLSTATE '".$err[0]."']");
add2statusbarKO("[ERREUR DB '".$err[1]."']");
add2statusbarKO("[ERREUR MSG '".$err[2]."']");
//en mode prod, ne pas afficher le SQL !!!!
if(!Inducido::prod_environment())
if($sql!="")
add2statusbarKO("[SQL: $sql]");
}
}
}
//----------------------------------------------------------------------
function DBErrorAsString()
{
$s="";
if(DB::$dbHandle!=null)
{
$err=DB::$dbHandle->errorInfo();
if($err!=null && count($err)>=2)
{
$s=("[ERREUR SQLSTATE '".$err[0]."']");
$s.=("[ERREUR DB '".$err[1]."']");
$s.=("[ERREUR MSG '".$err[2]."']");
if(DB::$lastSQL!="")
$s.=("[SQL: ".DB::$lastSQL."]");
}
}
return $s;
}
//----------------------------------------------------------------------
/* Démarre une transaction, désactivation de l'auto-commit */
static function beginTransaction()
{
if(DB::$dbHandle!=null)
{
$newid=DB::$dbHandle->beginTransaction();
return $newid;
}
return -1;
}
static function commit()
{
if(DB::$dbHandle!=null)
{
$newid=DB::$dbHandle->commit();
return $newid;
}
return -1;
}
static function now()
{ return DB::sysdate(); }
//usage
//$result=DB::query("UPDATE todo SET date=".DB::sysdate());
static function sysdate()
{
return "datetime('now')";
}
public static function url(){ //lazy connect (on first sql call)
if(!DB::$db_init_called)
DB::init(); return self::$dburl; }
}