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egroupware/phpgwapi/inc/class.db.inc.php

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<?php
/**************************************************************************\
* phpGroupWare API - database support via ADOdb *
* ------------------------------------------------------------------------ *
* This program is free software; you can redistribute it and/or modify it *
* under the terms of the GNU Lesser General Public License as published *
* by the Free Software Foundation; either version 2.1 of the License, or *
* any later version. *
\**************************************************************************/
/* $Id$ */
/*
* Database abstraction library
*
* This allows eGroupWare to use multiple database backends via ADOdb
*
* @package phpgwapi
* @subpackage db
* @author RalfBecker@outdoor-training.de
* @license LGPL
*/
if(empty($GLOBALS['phpgw_info']['server']['db_type']))
{
$GLOBALS['phpgw_info']['server']['db_type'] = 'mysql';
}
if (@$GLOBALS['phpgw_info']['server']['use_adodb'])
{
include_once('adodb/adodb.inc.php');
}
class db_
{
/**
* @var string $type database type
*/
var $type = '';
/**
* @var string $Host database host to connect to
*/
var $Host = '';
/**
* @var string $Port port number of database to connect to
*/
var $Port = '';
/**
* @var string $Database name of database to use
*/
var $Database = '';
/**
* @var string $User name of database user
*/
var $User = '';
/**
* @var string $Password password for database user
*/
var $Password = '';
/**
* @var bool $auto_stripslashes automatically remove slashes when returning field values - default False
*/
var $auto_stripslashes = False;
/**
* @var int $Auto_Free automatically free results - 0 no, 1 yes
*/
var $Auto_Free = 0;
/**
* @var int $Debug enable debuging - 0 no, 1 yes
*/
var $Debug = 0;
/**
* @var string $Halt_On_Error "yes" (halt with message), "no" (ignore errors quietly), "report" (ignore errror, but spit a warning)
*/
var $Halt_On_Error = 'no';//'yes';
/**
* @var string $Seq_Table table for storing sequences ????
*/
var $Seq_Table = 'db_sequence';
/**
* @var array $Record current record
*/
var $Record = array();
/**
* @var int row number for current record
*/
var $Row;
/**
* @var int $Errno internal rdms error number for last error
*/
var $Errno = 0;
/**
* @var string descriptive text from last error
*/
var $Error = '';
//i am not documenting private vars - skwashd :)
var $xmlrpc = False;
var $soap = False;
var $Link_ID = 0;
var $Query_ID = 0;
/**
* @param string $query query to be executed (optional)
*/
function db($query = '')
{
$this->query($query);
}
function db_($query='') {} // only for NOT useing ADOdb
/**
* @return int current connection id
*/
function link_id()
{
return $this->Link_ID;
}
/**
* @return int id of current query
*/
function query_id()
{
return $this->Query_ID;
}
/**
* Open a connection to a database
*
* @param string $Database name of database to use (optional)
* @param string $Host database host to connect to (optional)
* @param string $User name of database user (optional)
* @var string $Password password for database user (optional)
*/
function connect($Database = '', $Host = '', $Port = '', $User = '', $Password = '')
{
/* Handle defaults */
if ($Database == '')
{
$Database = $this->Database;
}
if ($Host == '')
{
$Host = $this->Host;
}
if ($Port == '')
{
$Port = $this->Port;
}
if (isset($Port))
{
$Host = $Host.':'.$Port;
}
if ($User == '')
{
$User = $this->User;
}
if ($Password == '')
{
$Password = $this->Password;
}
if (!$this->Link_ID)
{
$this->type = $GLOBALS['phpgw_info']['server']['db_type'];
if (!is_object($GLOBALS['phpgw']->ADOdb))
{
switch($this->type) // convert to ADO db-type-names
{
case 'pgsql':
$type = 'postgres';
break;
default:
$type = $this->type;
}
$GLOBALS['phpgw']->adodb = ADONewConnection($type);
if (!$GLOBALS['phpgw']->adodb)
{
$this->halt("No ADOdb support for '$type' !!!");
}
$connect = $GLOBALS['phpgw_info']['server']['db_persistent'] ? 'PConnect' : 'Connect';
if (!$connect = $GLOBALS['phpgw']->adodb->$connect($Host, $User, $Password, $Database))
{
$this->halt("ADOdb::$connect($Host, $User, \$Password, $Database) failed.");
}
}
$this->Link_ID = &$GLOBALS['phpgw']->adodb;
}
return $this->Link_ID;
}
/**
* Close a connection to a database - not needed for ADOdb connection
*/
function disconnect()
{
}
/**
* Escape strings before sending them to the database
*
* @param string $str the string to be escaped
* @return string escaped sting
*/
function db_addslashes($str)
{
if (!isset($str) || $str == '')
{
return '';
}
// REMOVE-IF-ONLY-ADODB
if (!@$GLOBALS['phpgw_info']['server']['use_adodb'])
{
return addslashes($str);
}
if (!$this->Link_ID)
{
$this->connect();
}
// the substring is needed as the string is already in quotes
return substr($this->Link_ID->quote($str),1,-1);
}
/**
* Convert a unix timestamp to a rdms specific timestamp
*
* @param int unix timestamp
* @return string rdms specific timestamp
*/
function to_timestamp($epoch)
{
// the substring is needed as the string is already in quotes
return substr($this->Link_ID->DBTimeStamp($epoch),1,-1);
}
/**
* Convert a rdms specific timestamp to a unix timestamp
*
* @param string rdms specific timestamp
* @return int unix timestamp
*/
function from_timestamp($timestamp)
{
return $this->Link_ID->UnixTimeStamp($timestamp);
}
/**
* @deprecated
* @see limit_query()
*/
function limit($start)
{}
/**
* Discard the current query result
*/
function free()
{
unset($this->Query_ID); // else copying of the db-object does not work
$this->Query_ID = 0;
}
/**
* Execute a query
*
* @param string $Query_String the query to be executed
* @param mixed $line the line method was called from - use __LINE__
* @param string $file the file method was called from - use __FILE__
* @param int $offset row to start from
* @param int $num_rows number of rows to return (optional), if unset will use $GLOBALS['phpgw_info']['user']['preferences']['common']['maxmatchs']
* @return int current query id if sucesful and null if fails
*/
function query($Query_String, $line = '', $file = '', $offset=0, $num_rows=-1)
{
if ($Query_String == '')
{
return 0;
}
if (!$this->connect())
{
return 0; /* we already complained in connect() about that. */
}
# New query, discard previous result.
if ($this->Query_ID)
{
$this->free();
}
if ($this->Link_ID->fetchMode != ADODB_FETCH_BOTH)
{
$this->Link_ID->SetFetchMode(ADODB_FETCH_BOTH);
}
if (! $num_rows)
{
$num_rows = $GLOBALS['phpgw_info']['user']['preferences']['common']['maxmatchs'];
}
if ($num_rows > 0)
{
$this->Query_ID = $this->Link_ID->SelectLimit($Query_String,$num_rows,(int)$offset);
}
else
{
$this->Query_ID = $this->Link_ID->Execute($Query_String);
}
$this->Row = 0;
$this->Errno = $this->Link_ID->ErrorNo();
$this->Error = $this->Link_ID->ErrorMsg();
if (! $this->Query_ID)
{
$this->halt("Invalid SQL: ".$Query_String, $line, $file);
}
return $this->Query_ID;
}
/**
* Execute a query with limited result set
*
* @param string $Query_String the query to be executed
* @param int $offset row to start from
* @param mixed $line the line method was called from - use __LINE__
* @param string $file the file method was called from - use __FILE__
* @param int $num_rows number of rows to return (optional), if unset will use $GLOBALS['phpgw_info']['user']['preferences']['common']['maxmatchs']
* @return int current query id if sucesful and null if fails
*/
function limit_query($Query_String, $offset, $line = '', $file = '', $num_rows = '')
{
return $this->query($Query_String,$line,$file,$offset,$num_rows);
}
/**
* Move to the next row in the results set
*
* @return bool was another row found?
*/
function next_record()
{
if (!$this->Query_ID)
{
$this->halt('next_record called with no query pending.');
return 0;
}
if ($this->Row) // first row is already fetched
{
$this->Query_ID->MoveNext();
}
++$this->Row;
$this->Record = $this->Query_ID->fields;
if ($this->Query_ID->EOF || !$this->Query_ID->RecordCount() || !is_array($this->Record))
{
return False;
}
return True;
}
/**
* Move to position in result set
*
* @param int $pos required row (optional), default first row
* @return int 1 if sucessful or 0 if not found
*/
function seek($pos = 0)
{
if (!$this->Query_ID->Move($this->Row = $pos))
{
$this->halt("seek($pos) failed: resultset has " . $this->num_rows() . " rows");
$this->Query_ID->Move( $this->num_rows() );
$this->Row = $this->num_rows();
return False;
}
return True;
}
/**
* Begin Transaction
*
* @return int current transaction id
*/
function transaction_begin()
{
//return $this->Link_ID->BeginTrans();
return $this->Link_ID->StartTrans();
}
/**
* Complete the transaction
*
* @return bool True if sucessful, False if fails
*/
function transaction_commit()
{
//return $this->Link_ID->CommitTrans();
return $this->Link_ID->CompleteTrans();
}
/**
* Rollback the current transaction
*
* @return bool True if sucessful, False if fails
*/
function transaction_abort()
{
//return $this->Link_ID->RollbackTrans();
return $this->Link_ID->FailTrans();
}
/**
* Find the primary key of the last insertion on the current db connection
*
* @param string $table name of table the insert was performed on
* @param string $field the autoincrement primary key of the table
* @return int the id, -1 if fails
*/
function get_last_insert_id($table, $field)
{
$id = $this->Link_ID->Insert_ID();
if ($id === False) // function not supported
{
echo "<p>db::get_last_insert_id(table='$table',field='$field') not yet implemented for db-type '$this->type'</p>\n";
return -1;
}
if ($this->type != 'pgsql' || $id == -1)
{
return $id;
}
// pgsql code to transform the OID into the real id
$id = $this->Link_ID->GetOne("SELECT $field FROM $table WHERE oid=$id");
return $id !== False ? $id : -1;
}
/**
* Lock a table
*
* @param string $table name of table to lock
* @param string $mode type of lock required (optional), default write
* @return bool True if sucessful, False if fails
*/
function lock($table, $mode='write')
{}
/**
* Unlock a table
*
* @return bool True if sucessful, False if fails
*/
function unlock()
{}
/**
* Get the number of rows affected by last update
*
* @return int number of rows
*/
function affected_rows()
{
return $this->Link_ID->Affected_Rows();
}
/**
* Number of rows in current result set
*
* @return int number of rows
*/
function num_rows()
{
return $this->Query_ID->RecordCount();
}
/**
* Number of fields in current row
*
* @return int number of fields
*/
function num_fields()
{
return $this->Query_ID->FieldCount();
}
/**
* short hand for @see num_rows()
*/
function nf()
{
return $this->num_rows();
}
/**
* short hand for print @see num_rows
*/
function np()
{
print $this->num_rows();
}
/**
* Return the value of a column
*
* @param string/integer $Name name of field or positional index starting from 0
* @param bool $strip_slashes string escape chars from field(optional), default false
* @return string the field value
*/
function f($Name, $strip_slashes = False)
{
if ($strip_slashes || ($this->auto_stripslashes && ! $strip_slashes))
{
return stripslashes($this->Record[$Name]);
}
else
{
return $this->Record[$Name];
}
}
/**
* Print the value of a field
*
* @param string $Name name of field to print
* @param bool $strip_slashes string escape chars from field(optional), default false
*/
function p($Name, $strip_slashes = True)
{
print $this->f($Name, $strip_slashes);
}
/**
* Returns a query-result-row as an associative array (no numerical keys !!!)
*
* @param bool $do_next_record should next_record() be called or not (default not)
* @return array/bool the associative array or False if no (more) result-row is availible
*/
function row($do_next_record=False)
{
if ($do_next_record && !$this->next_record() || !is_array($this->Record))
{
return False;
}
$result = array();
foreach($this->Record as $column => $value)
{
if (!is_numeric($column))
{
$result[$column] = $value;
}
}
return $result;
}
/**
* Get the id for the next sequence - not implemented!
*
* This seems not to be used anywhere in eGroupWhere !!!
*
* @param string $seq_name name of the sequence
* @return int sequence id
*/
function nextid($seq_name)
{
echo "<p>db::nextid(sequence='$seq_name') not yet implemented</p>\n";
}
/**
* Error handler
*
* @param string $msg error message
* @param int $line line of calling method/function (optional)
* @param string $file file of calling method/function (optional)
*/
function halt($msg, $line = '', $file = '')
{
if ($this->Link_ID) // only if we have a link, else infinite loop
{
$this->Error = $this->Link_ID->ErrorMsg(); // need to be BEFORE unlock,
$this->Errno = $this->Link_ID->ErrorNo(); // else we get its error or none
$this->unlock(); /* Just in case there is a table currently locked */
}
if ($this->Halt_On_Error == "no")
{
return;
}
$this->haltmsg($msg);
if ($file)
{
printf("<br><b>File:</b> %s",$file);
}
if ($line)
{
printf("<br><b>Line:</b> %s",$line);
}
printf("<br><b>Function:</b> %s\n",function_backtrace(2));
if ($this->Halt_On_Error != "report")
{
echo "<p><b>Session halted.</b>";
$GLOBALS['phpgw']->common->phpgw_exit(True);
}
}
function haltmsg($msg)
{
printf("<p><b>Database error:</b> %s<br>\n", $msg);
if ($this->Errno != "0" && $this->Error != "()")
{
printf("<b>$this->type Error</b>: %s (%s)<br>\n",$this->Errno,$this->Error);
}
}
/**
* Get description of a table
*
* Beside the column-name all other data depends on the db-type !!!
*
* @param string $table name of table to describe
* @param bool $full optional, default False summary information, True full information
* @return array table meta data
*/
function metadata($table='',$full=false)
{
$columns = $this->Link_ID->MetaColumns($table);
//echo "<b>metadata</b>('$table')=<pre>\n".print_r($columns,True)."</pre>\n";
$metadata = array();
$i = 0;
foreach($columns as $column)
{
$metadata[$i] = $column;
$metadata[$i]['table'] = $table;
if ($full)
{
$metadata['meta'][$column['name']] = $i;
}
++$i;
}
if ($full)
{
$metadata['num_fields'] = $i;
}
return $metadata;
}
/**
* Get a list of table names in the current database
*
* @return array list of the tables
*/
function table_names()
{
$this->connect();
$result = array();
$tables = $this->Link_ID->MetaTables('TABLES');
if (is_array($tables))
{
foreach($tables as $table)
{
$result[] = array(
'table_name' => $table,
'tablespace_name' => $this->Database,
'database' => $this->Database
);
}
}
return $result;
}
/**
* Return a list of indexes in current database
*
* @return array list of indexes
*/
function index_names()
{
echo "<p>db::index_names() not yet implemented</p>\n";
return array();
}
/**
* Create a new database
*
* @param string $adminname name of database administrator user (optional)
* @param string $adminpasswd password for the database administrator user (optional)
*/
function create_database($adminname = '', $adminpasswd = '')
{
echo "<p>db::create_database(user='$adminname',\$pw) not yet implemented</p>\n";
}
/**
* Implodes an array of column-value pairs for the use in sql-querys.
* All data is either run through addslashes() or (int).
*
* @author RalfBecker<at>outdoor-training.de
*
* @param string $glue in most cases this will be either ',' or ' AND ', depending you your query
* @param array $array column-value pairs
* @param boolean $use_key should a "$key=" prefix each value, typicaly set to False for insert querys
* @param array/boolean $only if set to an array only colums which are set (as data !!!) are written
* typicaly used to form a WHERE-clause from the primary keys
* @param array/boolean $column_definitions this can be set to the column-definitions-array
* of your table ($tables_baseline[$table]['fd'] of the setup/tables_current.inc.php file).
* If its set, the column-type-data determinates if (int) or addslashes is used.
*/
function column_data_implode($glue,$array,$use_key=True,$only=False,$column_definitions=False)
{
if (!$column_definitions)
{
$column_definitions = $this->column_definitions;
}
$pairs = array();
foreach($array as $key => $data)
{
if (!$only || in_array($key,$only))
{
$column_type = is_array($column_definitions) ? @$colum_definitions[$key]['type'] : False;
$values[] = ($use_key ? $key.'=' : '').
($column_type == 'int' || $colum_type == 'auto' ?
(int)$data : "'" . $this->db_addslashes($data) . "'");
}
}
return implode($glue,$values);
}
/**
* Sets the default column-definitions for use with column_data_implode()
*
* @author RalfBecker<at>outdoor-training.de
*
* @param array/boolean $column_definitions this can be set to the column-definitions-array
* of your table ($tables_baseline[$table]['fd'] of the setup/tables_current.inc.php file).
* If its set, the column-type-data determinates if (int) or addslashes is used.
*/
function set_column_definitions($column_definitions=False)
{
$this->column_definitions=$column_definitions;
}
/**
* reads the table-definitions from the app's setup/tables_current.inc.php file
*
* @author RalfBecker<at>outdoor-training.de
*
* @param string $app name of the app
* @param bool/string $table if set return only defintions of that table, else return all defintions
* @return the table-defintions or False if file not found
*/
function get_table_definitions($app,$table=False)
{
if (!isset($this->table_definitions[$app]))
{
$tables_current = PHPGW_INCLUDE_ROOT . "/$app/setup/tables_current.inc.php";
if (!@file_exists($tables_current))
{
return $this->table_definitions[$app] = False;
}
include($tables_current);
$this->table_definitions[$app] = $phpgw_baseline;
}
if ($table && (!$this->table_definitions[$app] || !isset($this->table_definitions[$app][$table])))
{
return False;
}
return $table ? $this->table_definitions[$app][$table] : $this->table_definitions[$app];
}
}
// REMOVE-IF-ONLY-ADODB
if (!@$GLOBALS['phpgw_info']['server']['use_adodb'])
{
include(PHPGW_API_INC.'/class.db_'.$GLOBALS['phpgw_info']['server']['db_type'].'.inc.php');
}
else
{
class db extends db_{}
}
?>
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