<?php
/* Copyright (C) 2001      Fabien Seisen        <seisen@linuxfr.org>
 * Copyright (C) 2002-2005 Rodolphe Quiedeville <rodolphe@quiedeville.org>
 * Copyright (C) 2004-2008 Laurent Destailleur  <eldy@users.sourceforge.net>
 * Copyright (C) 2004      Sebastien Di Cintio  <sdicintio@ressource-toi.org>
 * Copyright (C) 2004      Benoit Mortier		<benoit.mortier@opensides.be>
 * Copyright (C) 2005-2009 Regis Houssin        <regis@dolibarr.fr>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

/**
	    \file       htdocs/lib/databases/pgsql.lib.php
		\brief      Fichier de la classe permettant de gerer une base pgsql
		\version	$Id$
*/
// For compatibility during upgrade
if (! defined('DOL_DOCUMENT_ROOT'))	 define('DOL_DOCUMENT_ROOT', '../..');
if (! defined('ADODB_DATE_VERSION')) include_once(DOL_DOCUMENT_ROOT."/includes/adodbtime/adodb-time.inc.php");


/**
        \class      DoliDb
        \brief      Classe permettant de gerer la database de dolibarr
*/
class DoliDb
{
    var $db;                      // Handler de base
    var $type='pgsql';            // Nom du gestionnaire
   //! Charset
    var $forcecharset='latin1';
	var $versionmin=array(8,1,0);	// Version min database

    var $results;                 // Resultset de la derniere requete

    var $connected;               // 1 si connecte, 0 sinon
    var $database_selected;       // 1 si base selectionne, 0 sinon
    var $database_name;			  // Nom base selectionnee
    var $database_user;	   //! Nom user base
    var $transaction_opened;      // 1 si une transaction est en cours, 0 sinon
    var $lastquery;
	var $lastqueryerror;		// Ajout d'une variable en cas d'erreur

    var $ok;
    var $error;
    var $lasterror;


    /**
     * \brief      Ouverture d'une connexion vers le serveur et une database.
     * \param		type		type de base de donnees (mysql ou pgsql)
     * \param		host		addresse de la base de donnees
     * \param	    user		nom de l'utilisateur autorise
     * \param		pass		mot de passe
     * \param		name		nom de la database
     * \param	    port		Port of database server
     * \return		int			1 en cas de succes, 0 sinon
     */
    function DoliDb($type='pgsql', $host, $user, $pass, $name='', $port=0)
    {
    	global $conf,$langs;

		$this->forcecharset=$conf->file->character_set_client;
	    $this->forcecollate=$conf->db->dolibarr_main_db_collation;
	    $this->database_user=$user;

        $this->transaction_opened=0;

        //print "Name DB: $host,$user,$pass,$name<br>";

        if (! function_exists("pg_connect"))
        {
        	$this->connected = 0;
        	$this->ok = 0;
            $this->error="Pgsql PHP functions are not available in this version of PHP";
        	dol_syslog("DoliDB::DoliDB : Pgsql PHP functions are not available in this version of PHP",LOG_ERR);
            return $this->ok;
        }

        if (! $host)
        {
        	$this->connected = 0;
        	$this->ok = 0;
            $this->error=$langs->trans("ErrorWrongHostParameter");
        	dol_syslog("DoliDB::DoliDB : Erreur Connect, wrong host parameters",LOG_ERR);
            return $this->ok;
        }

        // Essai connexion serveur
        $this->db = $this->connect($host, $user, $pass, $name, $port);

        if ($this->db)
        {
            $this->connected = 1;
            $this->ok = 1;
        }
        else
        {
            // host, login ou password incorrect
            $this->connected = 0;
            $this->ok = 0;
			$this->error='Host, login or password incorrect';
            dol_syslog("DoliDB::DoliDB : Erreur Connect ".$this->error,LOG_ERR);
        }

        // Si connexion serveur ok et si connexion base demandee, on essaie connexion base
        if ($this->connected && $name)
        {
            if ($this->select_db($name))
            {
                $this->database_selected = 1;
                $this->database_name = $name;
                $this->ok = 1;
            }
            else
            {
                $this->database_selected = 0;
                $this->database_name = '';
                $this->ok = 0;
                $this->error=$this->error();
                dol_syslog("DoliDB::DoliDB : Erreur Select_db ".$this->error,LOG_ERR);
            }
        }
        else
        {
            // Pas de selection de base demandee, ok ou ko
            $this->database_selected = 0;
        }

        return $this->ok;
    }


    /**
	 *	\brief		Convert a SQL request in mysql syntax to database syntax
	 * 	\param		line		SQL request line to convert
	 * 	\return		string		SQL request line converted
	 */
	function convertSQLFromMysql($line)
	{
		# comments or empty lines
    	if (eregi('^-- \$Id',$line)) {
    		return '';
		}
		# comments or empty lines
    	if (eregi('^#',$line) || eregi('^$',$line) || eregi('^--',$line))
    	{
    		return $line;
    	}
    	if ($create_sql != "")
    	{ 		# we are inside create table statement so lets process datatypes
    		if (eregi('(ISAM|innodb)',$line)) { # end of create table sequence
    			$line=eregi_replace('\) *type=(MyISAM|innodb);',');');
    			$line=eregi_replace('\) *engine=(MyISAM|innodb);',');');
    		}

            # int, auto_increment -> serial
//    		} elsif (/^[\s\t]*(\w*)\s*.*int.*auto_increment/i) {
//    			$seq = qq~${table}_${1}_seq~;
//    			s/[\s\t]*([a-zA-Z_0-9]*)\s*.*int.*auto_increment[^,]*/  $1 SERIAL PRIMARY KEY/ig;
//    			$create_sql.=$_;

    		# int type conversion
/*    		} elsif (/(\w*)int\(\d+\)/i) {
    			$size=$1;
    			$size =~ tr [A-Z] [a-z];
    			if ($size eq "tiny" || $size eq "small") {
    				$out = "int2";
    			} elsif ($size eq "big") {
    				$out = "int8";
    			} else {
    				$out = "int4";
    			}
    			s/\w*int\(\d+\)/$out/g;
    		}
*/
    		$line=eregi_replace('tinyint','smallint');

    		# nuke unsigned
    		if (eregi_replace('(int\w+|smallint)\s+unsigned','smallint',$reg))
    		{
    			$line=eregi_replace('(int\w+|smallint)\s+unsigned',$reg[1]);
    		}


    		# blob -> text
   			$line=eregi_replace('\w*blob','text');

    		# tinytext/mediumtext -> text
   			$line=eregi_replace('tinytext','text');
   			$line=eregi_replace('mediumtext','text');

    		# char -> varchar
    		# PostgreSQL would otherwise pad with spaces as opposed
    		# to MySQL! Your user interface may depend on this!
//    		s/(\s+)char/${1}varchar/gi;

    		# nuke date representation (not supported in PostgreSQL)
//    		s/datetime default '[^']+'/datetime/i;
//    		s/date default '[^']+'/datetime/i;
//    		s/time default '[^']+'/datetime/i;

    		# change not null datetime field to null valid ones
    		# (to support remapping of "zero time" to null
   			$line=eregi_replace('datetime not null','datetime');
   			$line=eregi_replace('datetime','timestamp');

    		# nuke size of timestamp
//    		s/timestamp\([^)]*\)/timestamp/i;

    		# double -> real
//    		s/^double/real/i;
//    		s/(\s*)double/${1}real/i;

    		# unique key(field1,field2)
/*    		if (/unique key\s*\((\w+\s*,\s*\w+)\)/i) {
    		    s/unique key\s*\((\w+\s*,\s*\w+)\)/UNIQUE\($1\)/i;
                $create_sql.=$_;
    		    next;
    		}
*/
    		# unique index(field1,field2)
/*    		if (/unique index\s*\((\w+\s*,\s*\w+)\)/i) {
                s/unique index\s*\((\w+\s*,\s*\w+)\)/UNIQUE\($1\)/i;
                $create_sql.=$_;
    		    next;
    		}
*/
            # unique key [name] (field)
/*            if (/unique key\s*(\w*)\s*\((\w+)\)/i) {
                s/unique key\s*(\w*)\s*\((\w+)\)/UNIQUE\($2\)/i;
                my $idxname=($1?"$1":"idx_${table}_$2");
                $create_sql.=$_;
                $create_index .= "CREATE INDEX $idxname ON $table ($2);\n";
                next;
            }
*/
            # unique index [name] (field)
/*            if (/unique index\s*(\w*)\s*\((\w+)\)/i) {
                s/unique index\s*(\w*)\s*\((\w+)\)/UNIQUE\($2\)/i;
                my $idxname=($1?"$1":"idx_${table}_$2");
                $create_sql.=$_;
                $create_index .= "CREATE INDEX $idxname ON $table ($2);\n";
                next;
            }
*/
            # unique (field) et unique (field1, field2 ...)
/*            if (/unique\s*\(([\w,\s]+)\)/i) {
                s/unique\s*\(([\w,\s]+)\)/UNIQUE\($1\)/i;
                my $fieldlist="$1";
                my $idxname="idx_${table}_${fieldlist}";
                $idxname =~ s/\W/_/g; $idxname =~ tr/_/_/s;
                $create_sql.=$_;
                $create_index .= "CREATE INDEX $idxname ON $table ($fieldlist);\n";
                next;
            }
*/
            # index(field)
/*            if (/index\s*(\w*)\s*\((\w+)\)/i) {
                my $idxname=($1?"$1":"idx_${table}_$2");
                $create_index .= "CREATE INDEX $idxname ON $table ($2);\n";
                next;
            }
*/
            # primary key
/*    		if (/\bkey\b/i && !/^\s+primary key\s+/i) {
    			s/KEY(\s+)[^(]*(\s+)/$1 UNIQUE $2/i;		 # hack off name of the non-primary key
    		}
*/
            # key(xxx)
/*            if (/key\s*\((\w+)\)/i) {
                my $idxname="idx_${table}_$1";
                $create_index .= "CREATE INDEX $idxname ON $table ($1);\n";
                next;
            }
*/
    		# Quote column names
/*    		s/(^\s*)([^\s\-\(]+)(\s*)/$1"$2"$3/gi if (!/\bkey\b/i);
*/
    		# Remap colums with names of existing system attribute
/*    		if (/"oid"/i) {
    			s/"oid"/"_oid"/g;
    			print STDERR "WARNING: table $table uses column \"oid\" which is renamed to \"_oid\"\nYou should fix application manually! Press return to continue.";
    			my $wait=<STDIN>;
    		}
    		s/oid/_oid/i if (/key/i && /oid/i); # fix oid in key
    		$create_sql.=$_;
*/
    	} #  END of if ($create_sql ne "") i.e. were inside create table statement so processed datatypes
    	else {	# not inside create table
    		#---- fix data in inserted data: (from MS world)
    		# FIX: disabled for now
/*    		if (00 && /insert into/i) {
    			s!\x96!-!g;	# --
    			s!\x93!"!g;	# ``
    			s!\x94!"!g;	# ''
    			s!\x85!... !g;	# \ldots
    			s!\x92!`!g;
    		}
*/
    		# fix dates '0000-00-00 00:00:00' (should be null)
/*    		s/'0000-00-00 00:00:00'/null/gi;
    		s/'0000-00-00'/null/gi;
    		s/'00:00:00'/null/gi;
    		s/([12]\d\d\d)([01]\d)([0-3]\d)([0-2]\d)([0-6]\d)([0-6]\d)/'$1-$2-$3 $4:$5:$6'/;

    		if (/create\s+table\s+(\w+)/i) {
    			$create_sql = $_;
    			/create\s*table\s*(\w+)/i;
    			$table=$1 if (defined($1));
    		} else {
    			print OUT $_;
    		}
*/
    	} # end of if inside create_table


		return $line;
	}

    /**
     * \brief      Selectionne une database.
     * \param		database		nom de la database
     * \return		boolean         true si ok, false si ko
     * \remarks 	Ici postgresql n'a aucune fonction equivalente de mysql_select_db
     * \remarks 	On compare juste manuellement si la database choisie est bien celle activee par la connexion
     */
    function select_db($database)
    {
        if ($database == $this->database_name)
        	return true;
        else
        	return false;
    }

    /**
     * \brief      Connection vers le serveur
     * \param		host		addresse de la base de donnees
     * \param		login		nom de l'utilisateur autorise
     * \param		passwd		mot de passe
     * \param		name		nom de la database (ne sert pas sous mysql, sert sous pgsql)
     * \param		port		Port of database server
     * \return		resource	handler d'acces a la base
     */
    function connect($host, $login, $passwd, $name, $port=0)
    {
    	if (!$name){
    		$name="postgres";
    	}
        $con_string = "host=$host port=$port dbname=$name user=$login password=$passwd";
        $this->db = pg_connect($con_string);
        if ($this->db)
        {
            $this->database_name = $name;
        }
        return $this->db;
    }

    /**
     * \brief          Renvoie la version du serveur
     * \return	        string      Chaine version
     */
    function getVersion()
    {
    	$resql=$this->query('SHOW server_version');
	    $liste=$this->fetch_array($resql);
	    return $liste['server_version'];
    }

    /**
     * \brief		Renvoie la version du serveur sous forme de nombre
     * \return		string      Chaine version
     */
    function getIntVersion()
	{
		$version = $this->getVersion();
		$vlist = split('[.-]',$version);
		if (strlen($vlist[1])==1){
			$vlist[1]="0".$vlist[1];
		}
		if (strlen($vlist[2])==1){
			$vlist[2]="0".$vlist[2];
		}
		return $vlist[0].$vlist[1].$vlist[2];
	}

    /**
     * \brief		Renvoie la version du serveur dans un tableau
     * \return		array  		Tableau de chaque niveau de version
     */
    function getVersionArray()
    {
        return split('\.',$this->getVersion());
    }

    /**
     * \brief      Fermeture d'une connexion vers une database.
     * \return	    resource
     */
    function close()
    {
		dol_syslog("DoliDB::disconnect",LOG_DEBUG);
    	return pg_close($this->db);
    }

    /**
     * \brief      Debut d'une transaction.
     * \return	    int         1 si ouverture transaction ok ou deja ouverte, 0 en cas d'erreur
     */
    function begin()
    {
        if (! $this->transaction_opened)
        {
            $ret=$this->query("BEGIN;");
            if ($ret)
			{
				$this->transaction_opened++;
				dol_syslog("BEGIN Transaction",LOG_DEBUG);
			}
            return $ret;
        }
        else
        {
            $this->transaction_opened++;
            return 1;
        }
    }

    /**
     * \brief      Validation d'une transaction
     * \return	    int         1 si validation ok ou niveau de transaction non ouverte, 0 en cas d'erreur
     */
    function commit()
    {
        if ($this->transaction_opened<=1)
        {
            $ret=$this->query("COMMIT;");
			if ($ret)
			{
				$this->transaction_opened=0;
				dol_syslog("COMMIT Transaction",LOG_DEBUG);
			}
            return $ret;
        }
        else
        {
            $this->transaction_opened--;
            return 1;
        }
    }

    /**
     * \brief      Annulation d'une transaction et retour aux anciennes valeurs
     * \return	    int         1 si annulation ok ou transaction non ouverte, 0 en cas d'erreur
     */
    function rollback()
    {
        if ($this->transaction_opened<=1)
        {
            $ret=$this->query("ROLLBACK;");
			$this->transaction_opened=0;
			dol_syslog("ROLLBACK Transaction",LOG_DEBUG);
            return $ret;
        }
        else
        {
            $this->transaction_opened--;
            return 1;
        }
    }


    /**
     * \brief      Effectue une requete et renvoi le resultset de reponse de la base
     * \param		query		Contenu de la query
     * \return	    resource    Resultset de la reponse
     */
    function query($query)
    {
        $query = trim($query);

		if ($this->forcecharset=="UTF-8"){
					$buffer=utf8_encode ($buffer);
		}
		$ret = pg_query($this->db, $query);
        if (! eregi("^COMMIT",$query) && ! eregi("^ROLLBACK",$query))
        {
            // Si requete utilisateur, on la sauvegarde ainsi que son resultset
			if (! $ret)
			{
				$this->lastqueryerror = $query;
            	$this->lasterror = $this->error();
            	$this->lasterrno = $this->errno();
            }
            $this->lastquery=$query;
            $this->results = $ret;
        }

        return $ret;
    }

    /**
     * \brief      Renvoie la ligne courante (comme un objet) pour le curseur resultset.
     * \param      resultset   Curseur de la requete voulue
     * \return	    resource
     */
    function fetch_object($resultset=0)
    {
        // Si le resultset n'est pas fourni, on prend le dernier utilise sur cette connexion
        if (! is_resource($resultset)) { $resultset=$this->results; }
        return pg_fetch_object($resultset);
    }

    /**
     * \brief      Renvoie les donnees dans un tableau.
     * \param      resultset   Curseur de la requete voulue
     * \return		array
     */
    function fetch_array($resultset=0)
    {
        // Si le resultset n'est pas fourni, on prend le dernier utilise sur cette connexion
        if (! is_resource($resultset)) { $resultset=$this->results; }
        return pg_fetch_array($resultset);
    }

    /**
     * \brief      Renvoie les donnees comme un tableau.
     * \param      resultset   Curseur de la requete voulue
     * \return	    array
     */
    function fetch_row($resultset=0)
    {
        // Si le resultset n'est pas fourni, on prend le dernier utilise sur cette connexion
        if (! is_resource($resultset)) { $resultset=$this->results; }
        return pg_fetch_row($resultset);
    }

    /**
     * \brief      Renvoie le nombre de lignes dans le resultat d'une requete SELECT
     * \see    	affected_rows
     * \param      resultset   Curseur de la requete voulue
     * \return     int		    Nombre de lignes
     */
    function num_rows($resultset=0)
    {
        // Si le resultset n'est pas fourni, on prend le dernier utilise sur cette connexion
        if (! is_resource($resultset)) { $resultset=$this->results; }
        return pg_num_rows($resultset);
    }

    /**
     * \brief      Renvoie le nombre de lignes dans le resultat d'une requete INSERT, DELETE ou UPDATE
     * \see    	num_rows
     * \param      resultset   Curseur de la requete voulue
     * \return     int		    Nombre de lignes
     */
    function affected_rows($resultset=0)
    {
        // Si le resultset n'est pas fourni, on prend le dernier utilise sur cette connexion
        if (! is_resource($resultset)) { $resultset=$this->results; }
        // pgsql necessite un resultset pour cette fonction contrairement
        // a mysql qui prend un link de base
        return pg_affected_rows($resultset);
    }


    /**
     * \brief      Libere le dernier resultset utilise sur cette connexion.
     * \param      resultset   Curseur de la requete voulue
     */
    function free($resultset=0)
    {
        // Si le resultset n'est pas fourni, on prend le dernier utilise sur cette connexion
        if (! is_resource($resultset)) { $resultset=$this->results; }
        // Si resultset en est un, on libere la m�moire
        if (is_resource($resultset)) pg_free_result($resultset);
    }


    /**
     * \brief      Defini les limites de la requete.
     * \param	    limit       nombre maximum de lignes retournees
     * \param	    offset      numero de la ligne a partir de laquelle recuperer les lignes
     * \return	    string      chaine exprimant la syntax sql de la limite
     */
    function plimit($limit=0,$offset=0)
    {
        global $conf;
        if (! $limit) $limit=$conf->liste_limit;
        if ($offset > 0) return " LIMIT $offset,$limit ";
        else return " LIMIT $limit ";
    }


	/**
	 * \brief      Defini le tri de la requete.
	 * \param	    sortfield   liste des champ de tri
	 * \param	    sortorder   ordre du tri
	 * \return	    string      chaine exprimant la syntax sql de l'ordre de tri
	 * \TODO		A mutualiser dans classe mere
	 */
    function order($sortfield=0,$sortorder=0)
    {
		if ($sortfield)
		{
			$return='';
			$fields=split(',',$sortfield);
			foreach($fields as $val)
			{
				if (! $return) $return.=' ORDER BY ';
				else $return.=',';

				$return.=$val;
				if ($sortorder) $return.=' '.$sortorder;
			}
			return $return;
		}
		else
		{
			return '';
		}
    }


	/**
	 * \brief      Escape a string to insert data.
	 * \param	    stringtoencode		String to escape
	 * \return	    string				String escaped
	 */
    function escape($stringtoencode)
	{
		return addslashes($stringtoencode);
	}


   /**
    *   \brief      Formatage (par la base de donnees) d'un champ de la base au format tms ou Date (YYYY-MM-DD HH:MM:SS)
    *               afin de retourner une donnee toujours au format universel date tms unix.
    *               Fonction a utiliser pour generer les SELECT.
    *   \param	    param       Date au format text a convertir
    *   \return	    date        Date au format tms.
    */
    function pdate($param)
    {
        return "unix_timestamp(".$param.")";
    }

	/**
	 *   \brief     Convert (by PHP) a GM Timestamp date into a GM string date to insert into a date field.
	 *              Function to use to build INSERT, UPDATE or WHERE predica
	 *   \param	    param       Date TMS to convert
	 *   \return	string      Date in a string YYYYMMDDHHMMSS
	 */
	function idate($param)
	{
		return adodb_strftime("%Y%m%d%H%M%S",$param);
	}

	/**
	 *	\brief  	Convert (by PHP) a PHP server TZ string date into a GM Timestamps date
	 * 				19700101020000 -> 3600 with TZ+1
	 * 	\param		string			Date in a string (YYYYMMDDHHMMSS, YYYYMMDD, YYYY-MM-DD HH:MM:SS)
	 *	\return		date			Date TMS
	 */
	function jdate($string)
	{
		$string=eregi_replace('[^0-9]','',$string);
		$tmp=$string.'000000';
		$date=dol_mktime(substr($tmp,8,2),substr($tmp,10,2),substr($tmp,12,2),substr($tmp,4,2),substr($tmp,6,2),substr($tmp,0,4));
		return $date;
	}

    /**
     *   \brief      Formatage d'un if SQL
     *   \param		test            chaine test
     *   \param		resok           resultat si test egal
     *   \param		resko           resultat si test non egal
     *   \return		string          chaine formate SQL
     */
    function ifsql($test,$resok,$resko)
    {
        return 'IF('.$test.','.$resok.','.$resko.')';
    }


    /**
     *   \brief      Renvoie la derniere requete soumise par la methode query()
     *   \return	    lastquery
     */
    function lastquery()
    {
        return $this->lastquery;
    }

    /**
     *   \brief      Renvoie la derniere requete en erreur
     *   \return	    string	lastqueryerror
     */
	function lastqueryerror()
	{
		return $this->lastqueryerror;
	}

    /**
     * \brief      Renvoie le libelle derniere erreur
     * \return	    string	lasterror
     */
	function lasterror()
	{
		return $this->lasterror;
	}

    /**
     * \brief      Renvoie le code derniere erreur
     * \return	    string	lasterrno
     */
	function lasterrno()
	{
		return $this->lasterrno;
	}

    /**
     * \brief     Renvoie le code erreur generique de l'operation precedente.
     * \return    error_num       (Exemples: DB_ERROR_TABLE_ALREADY_EXISTS, DB_ERROR_RECORD_ALREADY_EXISTS...)
     */
    function errno()
    {
        if (empty($error_regexps))
        {
            $error_regexps = array(
                '/(Table does not exist\.|Relation [\"\'].*[\"\'] does not exist|sequence does not exist|class ".+" not found)$/' => 'DB_ERROR_NOSUCHTABLE',
                '/table [\"\'].*[\"\'] does not exist/' => 'DB_ERROR_NOSUCHTABLE',
                '/Relation [\"\'].*[\"\'] already exists|Cannot insert a duplicate key into (a )?unique index.*/'      => 'DB_ERROR_RECORD_ALREADY_EXISTS',
                '/divide by zero$/'                     => 'DB_ERROR_DIVZERO',
                '/pg_atoi: error in .*: can\'t parse /' => 'DB_ERROR_INVALID_NUMBER',
                '/ttribute [\"\'].*[\"\'] not found$|Relation [\"\'].*[\"\'] does not have attribute [\"\'].*[\"\']/' => 'DB_ERROR_NOSUCHFIELD',
                '/parser: parse error at or near \"/'   => 'DB_ERROR_SYNTAX',
                '/referential integrity violation/'     => 'DB_ERROR_CONSTRAINT'
            );
        }
        foreach ($error_regexps as $regexp => $code) {
            if (preg_match($regexp, pg_last_error($this->db))) {
                return $code;
            }
        }
        $errno=pg_last_error($this->db);
        return ($errno?'DB_ERROR':'0');
    }

    /**
     * \brief 		Renvoie le texte de l'erreur pgsql de l'operation precedente.
     * \return		error_text
     */
    function error()
    {
        return pg_last_error($this->db);
    }

    /**
     * \brief      Recupere l'id genere par le dernier INSERT.
     * \param     	tab     Nom de la table concernee par l'insert. Ne sert pas sous MySql mais requis pour compatibilite avec Postgresql
     * \return     int     id
     */
    function last_insert_id($tab)
    {
        $result = pg_query($this->db,"SELECT MAX(rowid) FROM ".$tab." ;");
        $nbre = pg_num_rows($result);
        $row = pg_fetch_result($result,0,0);
        return $row;
    }

	/**
	 *	\brief          Encrypt sensitive data in database
	 *	\param	        fieldorvalue	Field name or value to encrypt
	 * 	\param			cryptType		Type of encryption (2: AES (recommended), 1: DES , 0: no encryption)
	 * 	\param			cryptKey		Encryption key
	 * 	\param			isAValue		String in field can be a field name or a value
	 * 	\return	        return			XXX(field) or XXX('value') or field or 'value'
	 */
	function encrypt($fieldorvalue, $cryptType=0, $cryptKey='', $isAValue=0)
	{
		$return = $fieldorvalue;
		return ($isAValue?"'":"").$return.($isAValue?"'":"");
	}


	/**
	 *	\brief          Decrypt sensitive data in database
	 *	\param	        field			Field name to decrypt
	 * 	\param			cryptType		Type of encryption (2: AES (recommended), 1: DES , 0: no encryption)
	 * 	\param			cryptKey		Encryption key
	 * 	\return	        return			Field to decrypt if used
	 */
	function decrypt($field, $cryptType=0, $cryptKey='')
	{
		$return = $field;
		return $return;
	}


	// Next function are not required. Only minor features use them.
	//--------------------------------------------------------------


	/**
     * \brief          Renvoie l'id de la connexion
     * \return	        string      Id connexion
     */
    function DDLGetConnectId()
    {
        return '?';
    }


    /**
	 *	\brief          Create a new database
 	 *	\param	        database		Database name to create
	 * 	\param			charset			Charset used to store data
	 * 	\param			collation		Charset used to sort data
	 * 	\return	        resource		resource defined if OK, null if KO
	 *  \remarks        Ne pas utiliser les fonctions xxx_create_db (xxx=mysql, ...) car elles sont deprecated
     */
    function DDLCreateDb($database,$charset='',$collation='')
    {
		if (empty($charset))   $charset=$this->forcecharset;
		if (empty($collation)) $collation=$this->collation;

    	$ret=$this->query('CREATE DATABASE '.$database.' OWNER '.$this->db_user.' ENCODING \''.$charset.'\' ;');
        return $ret;
    }

    /**
     * \brief      Liste des tables dans une database.
     * \param	    database	Nom de la database
     * \return	    resource
     */
    function DDLListTables($database)
    {
        $this->results = pg_query($this->db, "SHOW TABLES;");
        return  $this->results;
    }

	/**
	 *	\brief     	Liste les informations des champs d'une table.
	 *	\param	    table			Nom de la table
	 *	\return	    array			Tableau des informations des champs de la table
	 *	TODO modifier pour postgresql
	 */
	function DDLInfoTable($table)
	{
		/*
		$infotables=array();

		$sql="SHOW FULL COLUMNS FROM ".$table.";";

		dol_syslog($sql,LOG_DEBUG);
		$result = $this->pg_query($this->db,$sql);
		while($row = $this->fetch_row($result))
		{
			$infotables[] = $row;
		}
		return $infotables;
		*/
	}


	/**
	 * 	\brief      Create a user
	 *	\param	    dolibarr_main_db_host 		Ip serveur
	 *	\param	    dolibarr_main_db_user 		Nom user a creer
	 *	\param	    dolibarr_main_db_pass 		Mot de passe user a creer
	 *	\param		dolibarr_main_db_name		Database name where user must be granted
	 *	\return	    int							<0 si KO, >=0 si OK
	 */
	function DDLCreateUser($dolibarr_main_db_host,$dolibarr_main_db_user,$dolibarr_main_db_pass,$dolibarr_main_db_name)
	{
		$sql = "create user \"".$dolibarr_main_db_user."\" with password '".$dolibarr_main_db_pass."'";

		dol_syslog("pgsql.lib::DDLCreateUser", LOG_DEBUG);	// No sql to avoid password in log
		$resql=$this->query($sql);
		if (! $resql)
		{
			return -1;
		}

		return 1;
	}

	/**
	 *	\brief      Insert a new field in table
	 *	\param	    table 			Nom de la table
	 *	\param		field_name 		Nom du champ a inserer
	 *	\param	    field_desc 		Tableau associatif de description du champ a inserer[nom du parametre][valeur du parametre]
	 *	\param	    field_position 	Optionnel ex.: "after champtruc"
	 *	\return	    int				<0 si KO, >0 si OK
	 */
	function DDLAddField($table,$field_name,$field_desc,$field_position="")
	{
		// cles recherchees dans le tableau des descriptions (field_desc) : type,value,attribute,null,default,extra
		// ex. : $field_desc = array('type'=>'int','value'=>'11','null'=>'not null','extra'=> 'auto_increment');
		$sql= "ALTER TABLE ".$table." ADD ".$field_name." ";
		$sql .= $field_desc['type'];
		if( eregi("^[^ ]",$field_desc['value']))
		$sql  .= "(".$field_desc['value'].")";
		if( eregi("^[^ ]",$field_desc['attribute']))
		$sql  .= " ".$field_desc['attribute'];
		if( eregi("^[^ ]",$field_desc['null']))
		$sql  .= " ".$field_desc['null'];
		if( eregi("^[^ ]",$field_desc['default']))
		if(eregi("null",$field_desc['default']))
		$sql  .= " default ".$field_desc['default'];
		else
		$sql  .= " default '".$field_desc['default']."'";
		if( eregi("^[^ ]",$field_desc['extra']))
		$sql  .= " ".$field_desc['extra'];
		$sql .= " ".$field_position;

		dol_syslog($sql,LOG_DEBUG);
		if(! $this -> query($sql))
		return -1;
		else
		return 1;
	}

	/**
	 *	\brief      Drop a field in table
	 *	\param	    table 			Nom de la table
	 *	\param		field_name 		Nom du champ a inserer
	 *	\return	    int				<0 si KO, >0 si OK
	 */
	function DDLDropField($table,$field_name)
	{
		$sql= "ALTER TABLE ".$table." DROP COLUMN `".$field_name."`";
		dol_syslog($sql,LOG_DEBUG);
		if (! $this->query($sql))
		{
			$this->error=$this->lasterror();
			return -1;
		}
		else return 1;
	}

	/**
	 *	\brief		Return charset used to store data in database
	 *	\return		string		Charset
	 */
	function getDefaultCharacterSetDatabase(){
		 $resql=$this->query('SHOW SERVER_ENCODING');
	    $liste=$this->fetch_array($resql);
	    return $liste['server_encoding'];
	}

	/**
	 *	\brief		Return list of available charset that can be used to store data in database
	 *	\return		array		List of Charset
	 */
	function getListOfCharacterSet(){
		 $resql=$this->query('SHOW CHARSET');
		$liste = array();
		if ($resql)
			{
			$i = 0;
			while ($obj = $this->fetch_object($resql) )
			{
				$liste[$i]['charset'] = $obj->Charset;
				$liste[$i]['description'] = $obj->Description;
				$i++;
			}
	    	$this->free($resql);
	  	} else {
	  		// version Mysql < 4.1.1
	   		return null;
	  	}
    	return $liste;
	}

	/**
	 *	\brief		Return collation used in database
	 *	\return		string		Collation value
	 */
	function getDefaultCollationDatabase(){
		$resql=$this->query('SHOW VARIABLES LIKE \'collation_database\'');
		 if (!$resql)
	      {
			// version Mysql < 4.1.1
			return $this->forcecollate;
	      }
	    $liste=$this->fetch_array($resql);
	    return $liste['Value'];
	}

	/**
	 *	\brief		Return list of available collation that can be used for database
	 *	\return		array		Liste of Collation
	 */
	function getListOfCollation(){
		 $resql=$this->query('SHOW COLLATION');
		$liste = array();
		if ($resql)
			{
			$i = 0;
			while ($obj = $this->fetch_object($resql) )
			{
				$liste[$i]['collation'] = $obj->Collation;
				$i++;
			}
	    	$this->free($resql);
	  	} else {
	  		// version Mysql < 4.1.1
	   		return null;
	  	}
    	return $liste;
	}

}
?>