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[Phpgroupware-cvs] phpgwapi/inc/class.sql.inc.php, 1.2
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Subject: |
[Phpgroupware-cvs] phpgwapi/inc/class.sql.inc.php, 1.2 |
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Date: |
Thu, 30 Dec 2004 07:47:31 +0100 |
Update of /phpgwapi/inc
Added Files:
Branch:
class.sql.inc.php
date: 2004/12/30 06:47:31; author: skwashd; state: Exp; lines: +425 -0
Log Message:
new HEAD
=====================================================================
<?php
/**
* SQL Generator OPERANDS & TYPES - help to create criterias for common
queries
* @author Edgar Antonio Luna Diaz <address@hidden>
* @author Alejadro Borges
* @author Jonathan Alberto Rivera Gomez
* @copyright Copyright (C) 2003,2004 Free Software Foundation, Inc.
http://www.fsf.org/
* @license http://www.fsf.org/licenses/gpl.html GNU General Public
License
* @package phpgwapi
* @subpackage database
* @version $Id: class.sql.inc.php,v 1.2 2004/12/30 06:47:31 skwashd Exp
$
* @internal Development of this application was funded by
http://www.sogrp.com
* @link http://www.sogrp.com/
*/
if (empty($GLOBALS['phpgw_info']['server']['db_type']))
{
$GLOBALS['phpgw_info']['server']['db_type'] = 'mysql';
}
/**
* Include concrete database class
*/
include(PHPGW_API_INC.'/class.sql_'.$GLOBALS['phpgw_info']['server']['db_type'].'.inc.php');
/**
* SQL Generator OPERANDS & TYPES - help to create criterias for common
queries
*
* This class provide common methods to set, mantain, an retrive the
queries
* to use in a query (for the where clause).
* @package phpgwapi
* @subpackage database
* @abstract
*/
class sql_
{
function sql_()
{
}
/*************************************************************\
* Usefull low level functions to create queries logically *
\*************************************************************/
/**
* Genarete equal criteria for sql
*
* @param string $left The left operand of the staement
* @param string $right The right operand of the statement
* @return string with an equal criteria formated.
*/
function equal($field, $value)
{
return $field.' = '.$value;
}
/**
* Generate a critieria for non equal comparission for sql.
*
* @param string $left Left operand.
* @param string $right Right operand.
* @return string with criteria.
*/
function not_equal($field, $value)
{
return $field.' <> '.$value;
}
/**
* Generate greater than criteria for sql
*
* @param string $left The left operand of the staement
* @param string $right The right operand of the statement
* @return string with an greater than criteria formated.
*/
function greater($field, $value)
{
return $field.' > '.$value;
}
/**
* Generate less than criteria for sql (in string)
*
* @param string $left The left operand of the staement
* @param string $right The right operand of the statement
* @return string with an less than criteria formated.
*/
function less($field, $value)
{
return $field.' < '.$value;
}
/**
* Generate greater-equal than criteria for sql
*
* @param string $left The left operand of the staement
* @param string $right The right operand of the statement
* @return string with an greater-equal than criteria formated.
*/
function greater_equal($field, $value)
{
return $field.' >= '.$value;
}
/**
* Generate less-equal than criteria for sql (in string)
*
* @param string $left The left operand of the staement
* @param string $right The right operand of the statement
* @return string with an less-equal than criteria formated.
*/
function less_equal($field, $value)
{
return $field.' <= '.$value;
}
/**
* Generate a criteria for search in the content of a field a
value for sql.
*
* @param string $field For search in.
* @param string $value That will search.
* @return string that use LIKE to search in field.
*/
function has($field, $value)
{
return sql_criteria::upper($field).' LIKE
'."'%$value%'";
}
/**
* Generate a criteria to search in the beginning of a field for
sql.
*
* @param string $field For search in.
* @param string $value That will search.
* @return string that use LIKE to search in field.
*/
function begin_with($field, $value)
{
return sql_criteria::upper($field).' LIKE '."'$value%'";
}
/**
* Generate a critieria to search in the end of a field for sql.
*
* @param string $field For search in.
* @param string $value That will search.
* @return string that use LIKE to search in field.
*/
function end_with($field, $value)
{
return sql_criteria::upper($field).' LIKE '."'%$value'";
}
/**
* Generate an AND conjuction for sql criterias.
*
* Always return with brackets. I have more confidence in DBMS
speed than the code that I will need to analize it in php.
* @param string $left Left operand.
* @param string $right Right operand.
* @return string with (right) and (left)
*/
function and_($left, $right)
{
return '('.$left.' AND '.$right.')';
}
/**
* Generate an OR conjuction for sql criterias.
*
* @param string $left Left operand.
* @param string $right Right operand.
* @return string with (right) or (left)
*/
function or_($left, $right)
{
return ' ('.$left.' OR '.$right.') ';
}
/**
* Generate a is null critieria for sql.
*
* @param string $data A field.
* @return string with criteria.
*/
function is_null($data)
{
return $data.' IS NULL';
}
/**
* Generate a is not null critieria for sql.
*
* @param string $data A field.
* @return string with criteria.
*/
function not_null($data)
{
return $data.' IS NOT NULL';
}
function upper($value)
{
return 'UPPER('.$value.')';
}
function lower($value)
{
return 'LOWER('.$value.')';
}
/**
* Generate a IN sql operator
*
* @param string $field String with the field which you can
filter.
* @param string $values Array with posible values
* @return string with criteria.
*/
function in($field, $values, $type='integer')
{
// This must be changed by anything
if(count($values) > 1)
{
if($type != 'integer' && $type != '')
{
return str_replace(',\'', '\',\'',
$field.' IN (\''.implode(",'",$values)."')");
}
else
{
return $field.' IN ('.implode(",",
$values) .')';
}
}
else
{
$type = $type ? $type : 'integer';
if (is_array($values))
{
return sql::equal($field,
sql::$type(current($values)));
}
else
{
return sql::equal($field,
sql::$type($values));
}
}
}
/**
* Act like a lisp and(one, two, three,...infinity) adding
clause with and.
*
* All and's are in same level, (without parenethesis).
* @param string $and Array with the list of operators for and.
* @return string with many and conjuntions at same level.
*/
function append_and($clause)
{
if(is_array($clause))
{
$value = array_shift($clause);
$return_value = $value;
foreach($clause as $element)
{
$return_value .= empty($element)?'':'
AND '.$element;
}
return '('. $return_value .')';
}
}
/**
* Append many criterias with `or' conjuntion
*
* @param string $and Array with the list of operators for or.
* @return string with many or conjuntions at same level.
* @see append_and
*/
function append_or($clause)
{
if(is_array($clause))
{
$value = array_shift($clause);
$return_value = $value;
foreach($clause as $element)
{
$return_value .= empty($element)?'':'
OR '.$element;
}
return '('. $return_value.')';
}
}
/*************************************************************\
* SQL Standard Types *
\*************************************************************/
/**
* @param str string the value that will be casted for sql type
* @return string ready for using for a value with CHARACTER sql
type
*/
function string($str)
{
$str = db::db_addslashes($str);
return "'$str'";
}
function character($str)
{
return sql::string($str);
}
/**
* @param integer string the value that will be casted for sql
type
* @return string ready for using for a value with INTEGER sql
type
*/
function integer($integer)
{
return intval($integer);
}
/**
* Generate a string with date
*/
function date_($date, $format=False)
{
switch(gettype($date))
{
case 'integer':
return sql::int_date2str($date, $format);
default:
return sql::str_date2int($date, $format);
}
}
/**
* return a string with time
*/
function time_($time, $format=False)
{
switch(gettype($time))
{
case 'integer':
return sql::int_time2str($time, $format);
default:
return sql::str_time2int($time, $format);
}
}
/*************************************************************\
* Data types conversion *
\*************************************************************/
function int_date2str($int, $format=False)
{
$format = $format ? $format :
$GLOBALS['phpgw_info']['user']['preferences']['common']['dateformat'];
return date($format, intval($int));
}
function int_time2str($int, $format=False)
{
$format = $format ? $format :
$GLOBALS['phpgw_info']['user']['preferences']['common']['timeformat'];
return date($format, intval($int));
}
//note this is not 100% reliable, but close enough
function str_date2int($date, $format=False)
{
$format = $format ? $format :
$GLOBALS['phpgw_info']['user']['preferences']['common']['dateformat'];
return date($format, intval(strtotime($date)));
}
function str_time2int($time)
{
return intval(sql::str_date2int($time));
}
/*************************************************************\
* Constants *
\*************************************************************/
/**
* Return a NULL value
*/
function null()
{
return ' NULL ';
}
/*************************************************************\
* Functions *
\*************************************************************/
/**
* Return the function that concatenate fields on $elements
*
* @param array $elements array with the elemnts that want to
concatenate
* @return string with $elements concatenated
*/
function concat($elements)
{
}
/**
* Return the function that concatenate fields, when any
returned value<br />
* is null, it changet it for empty string.
*
* @param array $elements array with the elemnts that want to
concatenate
* @return string with $elements concatenated
*/
function concat_null($elements)
{
}
/**
* This function change to empty string, a NULL value for select.
*
* When data retrieved from database is NULL it allow change it
to empty<br />
* string. use it in SELECT development.
* @param string $value Field or expresion to make safe.
*/
function safe_null($value)
{
if(empty($value) || !is_array($value))
{
return array();
}
foreach($value as $data)
{
$return_value[] = '(CASE WHEN '.$data.' IS NULL
THEN \'\' ELSE '.$data.' END)';
}
return $return_value;
}
}
?>
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