forked from extern/egroupware
272 lines
6.6 KiB
PHP
272 lines
6.6 KiB
PHP
<?php
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/*
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* Session Management for PHP3
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*
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* Copyright (c) 1998-2000 NetUSE AG
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* Boris Erdmann, Kristian Koehntopp
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*
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* $Id$
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*
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*/
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class db {
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var $Host = "";
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var $Database = "";
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var $User = "";
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var $Password = "";
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var $auto_stripslashes = False;
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var $Halt_On_Error = "yes"; ## "yes" (halt with message), "no" (ignore errors quietly), "report" (ignore errror, but spit a warning)
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var $Link_ID = 0;
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var $Query_ID = 0;
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var $Record = array();
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var $Row = 0;
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var $Seq_Table = "db_sequence";
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var $Errno = 0;
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var $Error = "";
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var $Auto_Free = 0; # Set this to 1 for automatic pg_freeresult on
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# last record.
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function ifadd($add, $me) {
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if("" != $add) return " ".$me.$add;
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}
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/* public: constructor */
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function db($query = "") {
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$this->query($query);
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}
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function connect() {
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if ( 0 == $this->Link_ID ) {
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$cstr = "dbname=".$this->Database.
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$this->ifadd($this->Host, "host=").
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$this->ifadd($this->Port, "port=").
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$this->ifadd($this->User, "user=").
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$this->ifadd($this->Password, "password=");
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$this->Link_ID=pg_pconnect($cstr);
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if (!$this->Link_ID) {
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$this->halt("Link-ID == false, pconnect failed");
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}
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}
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}
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// This only affects systems not using persistant connections
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function disconnect()
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{
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return pg_close($this->Link_ID);
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}
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// I added the line and file section so we can have better error reporting. (jengo)
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function query($Query_String, $line = "", $file = "") {
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/* No empty queries, please, since PHP4 chokes on them. */
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if ($Query_String == "")
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/* The empty query string is passed on from the constructor,
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* when calling the class without a query, e.g. in situations
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* like these: '$db = new db_Subclass;'
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*/
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return 0;
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$this->connect();
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# printf("<br>Debug: query = %s<br>\n", $Query_String);
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$this->Query_ID = pg_Exec($this->Link_ID, $Query_String);
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$this->Row = 0;
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$this->Error = pg_ErrorMessage($this->Link_ID);
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$this->Errno = ($this->Error == "")?0:1;
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if (! $this->Query_ID) {
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$this->halt("Invalid SQL: ".$Query_String, $line, $file);
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}
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return $this->Query_ID;
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}
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// public: discard the query result
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function free() {
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@pg_freeresult($this->Query_ID);
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$this->Query_ID = 0;
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}
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function next_record() {
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$this->Record = @pg_fetch_array($this->Query_ID, $this->Row++);
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$this->Error = pg_ErrorMessage($this->Link_ID);
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$this->Errno = ($this->Error == "")?0:1;
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$stat = is_array($this->Record);
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if (!$stat && $this->Auto_Free) {
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pg_freeresult($this->Query_ID);
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$this->Query_ID = 0;
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}
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return $stat;
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}
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function seek($pos) {
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$this->Row = $pos;
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}
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function lock($table, $mode = "write") {
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$result = pg_Exec($this->Link_ID, "begin work");
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if ($mode == "write") {
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if (is_array($table)) {
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while ($t = each($table)) {
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$result = pg_Exec($this->Link_ID,"lock table $t[1] in share mode");
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}
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} else {
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$result = pg_Exec($this->Link_ID, "lock table $table in share mode");
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}
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} else {
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$result = 1;
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}
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return $result;
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}
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function unlock() {
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return pg_Exec($this->Link_ID, "commit work");
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}
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/* public: sequence numbers */
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function nextid($seq_name) {
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$this->connect();
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if ($this->lock($this->Seq_Table)) {
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/* get sequence number (locked) and increment */
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$q = sprintf("select nextid from %s where seq_name = '%s'",
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$this->Seq_Table,
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$seq_name);
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$id = @pg_Exec($this->Link_ID, $q);
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$res = @pg_Fetch_Array($id, 0);
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/* No current value, make one */
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if (!is_array($res)) {
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$currentid = 0;
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$q = sprintf("insert into %s values('%s', %s)",
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$this->Seq_Table,
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$seq_name,
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$currentid);
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$id = @pg_Exec($this->Link_ID, $q);
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} else {
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$currentid = $res["nextid"];
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}
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$nextid = $currentid + 1;
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$q = sprintf("update %s set nextid = '%s' where seq_name = '%s'",
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$this->Seq_Table,
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$nextid,
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$seq_name);
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$id = @pg_Exec($this->Link_ID, $q);
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$this->unlock();
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} else {
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$this->halt("cannot lock ".$this->Seq_Table." - has it been created?");
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return 0;
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}
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return $nextid;
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}
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function metadata($table) {
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$count = 0;
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$id = 0;
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$res = array();
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$this->connect();
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$id = pg_exec($this->Link_ID, "select * from $table");
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if ($id < 0) {
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$this->Error = pg_ErrorMessage($id);
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$this->Errno = 1;
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$this->halt("Metadata query failed.");
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}
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$count = pg_NumFields($id);
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for ($i=0; $i<$count; $i++) {
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$res[$i]["table"] = $table;
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$res[$i]["name"] = pg_FieldName ($id, $i);
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$res[$i]["type"] = pg_FieldType ($id, $i);
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$res[$i]["len"] = pg_FieldSize ($id, $i);
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$res[$i]["flags"] = "";
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}
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pg_FreeResult($id);
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return $res;
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}
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function affected_rows() {
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return pg_cmdtuples($this->Query_ID);
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}
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function num_rows() {
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return pg_numrows($this->Query_ID);
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}
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function num_fields() {
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return pg_numfields($this->Query_ID);
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}
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function nf() {
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return $this->num_rows();
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}
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function np() {
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print $this->num_rows();
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}
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function f($Name,$strip_slashes = "")
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{
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if ($strip_slashes || ($this->auto_stripslashes && ! $strip_slashes)) {
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return stripslashes($this->Record[$Name]);
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} else {
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return $this->Record[$Name];
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}
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}
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function p($Name) {
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print $this->Record[$Name];
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}
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function halt($msg, $line = "", $file = "")
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{
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global $phpgw;
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if($this->Halt_On_Error == "no") {
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return;
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}
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$this->unlock(); // Just in case there is a table currently locked
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printf("<b>Database error:</b> %s<br>\n", $msg);
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printf("<b>PostgreSQL Error</b>: %s (%s)<br>\n",
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$this->Errno,
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$this->Error);
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if ($file) {
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printf("<br><b>File:</b> %s",$file);
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}
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if ($line) {
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printf("<br><b>Line:</b> %s",$line);
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}
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if ($this->Halt_On_Error == "yes") {
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echo "<p><b>Session halted.</b>";
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$phpgw->common->phpgw_exit(True);
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}
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}
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function table_names() {
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$this->query("select relname from pg_class where relkind = 'r' and not relname like 'pg_%'");
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$i=0;
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while ($this->next_record())
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{
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$return[$i]["table_name"]= $this->f(0);
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$return[$i]["tablespace_name"]=$this->Database;
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$return[$i]["database"]=$this->Database;
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$i++;
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}
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return $return;
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}
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}
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