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<?php
/**
* Prototype Castable Object.. for DataObject queries
*
* Storage for Data that may be cast into a variety of formats.
*
* PHP versions 4 and 5
*
* LICENSE: This source file is subject to version 3.0 of the PHP license
* that is available through the world-wide-web at the following URI:
* http://www.php.net/license/3_0.txt. If you did not receive a copy of
* the PHP License and are unable to obtain it through the web, please
* send a note to license@php.net so we can mail you a copy immediately.
*
* @category Database
* @package DB_DataObject
* @author Alan Knowles <alan@akbkhome.com>
* @copyright 1997-2006 The PHP Group
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version CVS: $Id: Cast.php,v 1.15 2005/07/07 05:30:53 alan_k Exp $
* @link http://pear.php.net/package/DB_DataObject
*/
/**
*
* Common usages:
* // blobs
* $data = DB_DataObject_Cast::blob($somefile);
* $data = DB_DataObject_Cast::string($somefile);
* $dataObject->someblobfield = $data
*
* // dates?
* $d1 = new DB_DataObject_Cast::date('12/12/2000');
* $d2 = new DB_DataObject_Cast::date(2000,12,30);
* $d3 = new DB_DataObject_Cast::date($d1->year, $d1->month+30, $d1->day+30);
*
* // time, datetime.. ?????????
*
* // raw sql????
* $data = DB_DataObject_Cast::sql('cast("123123",datetime)');
* $data = DB_DataObject_Cast::sql('NULL');
*
* // int's/string etc. are proably pretty pointless..!!!!
*
*
* inside DB_DataObject,
* if (is_a($v,'db_dataobject_class')) {
* $value .= $v->toString(DB_DATAOBJECT_INT,'mysql');
* }
*
*
*
*
*/
class DB_DataObject_Cast {
/**
* Type of data Stored in the object..
*
* @var string (date|blob|.....?)
* @access public
*/
var $type;
/**
* Data For date representation
*
* @var int day/month/year
* @access public
*/
var $day;
var $month;
var $year;
/**
* Generic Data..
*
* @var string
* @access public
*/
var $value;
/**
* Blob consructor
*
* create a Cast object from some raw data.. (binary)
*
*
* @param string (with binary data!)
*
* @return object DB_DataObject_Cast
* @access public
*/
function blob($value) {
$r = new DB_DataObject_Cast;
$r->type = 'blob';
$r->value = $value;
return $r;
}
/**
* String consructor (actually use if for ints and everything else!!!
*
* create a Cast object from some string (not binary)
*
*
* @param string (with binary data!)
*
* @return object DB_DataObject_Cast
* @access public
*/
function string($value) {
$r = new DB_DataObject_Cast;
$r->type = 'string';
$r->value = $value;
return $r;
}
/**
* SQL constructor (for raw SQL insert)
*
* create a Cast object from some sql
*
* @param string (with binary data!)
*
* @return object DB_DataObject_Cast
* @access public
*/
function sql($value)
{
$r = new DB_DataObject_Cast;
$r->type = 'sql';
$r->value = $value;
return $r;
}
/**
* Date Constructor
*
* create a Cast object from some string (not binary)
* NO VALIDATION DONE, although some crappy re-calcing done!
*
* @param vargs... accepts
* dd/mm
* dd/mm/yyyy
* yyyy-mm
* yyyy-mm-dd
* array(yyyy,dd)
* array(yyyy,dd,mm)
*
*
*
* @return object DB_DataObject_Cast
* @access public
*/
function date()
{
$args = func_get_args();
switch(count($args)) {
case 0: // no args = today!
$bits = explode('-',date('Y-m-d'));
break;
case 1: // one arg = a string
if (strpos($args[0],'/') !== false) {
$bits = array_reverse(explode('/',$args[0]));
} else {
$bits = explode('-',$args[0]);
}
break;
default: // 2 or more..
$bits = $args;
}
if (count($bits) == 1) { // if YYYY set day = 1st..
$bits[] = 1;
}
if (count($bits) == 2) { // if YYYY-DD set day = 1st..
$bits[] = 1;
}
// if year < 1970 we cant use system tools to check it...
// so we make a few best gueses....
// basically do date calculations for the year 2000!!!
// fix me if anyone has more time...
if (($bits[0] < 1975) || ($bits[0] > 2030)) {
$oldyear = $bits[0];
$bits = explode('-',date('Y-m-d',mktime(1,1,1,$bits[1],$bits[2],2000)));
$bits[0] = ($bits[0] - 2000) + $oldyear;
} else {
// now mktime
$bits = explode('-',date('Y-m-d',mktime(1,1,1,$bits[1],$bits[2],$bits[0])));
}
$r = new DB_DataObject_Cast;
$r->type = 'date';
list($r->year,$r->month,$r->day) = $bits;
return $r;
}
/**
* Data For time representation ** does not handle timezones!!
*
* @var int hour/minute/second
* @access public
*/
var $hour;
var $minute;
var $second;
/**
* DateTime Constructor
*
* create a Cast object from a Date/Time
* Maybe should accept a Date object.!
* NO VALIDATION DONE, although some crappy re-calcing done!
*
* @param vargs... accepts
* noargs (now)
* yyyy-mm-dd HH:MM:SS (Iso)
* array(yyyy,mm,dd,HH,MM,SS)
*
*
* @return object DB_DataObject_Cast
* @access public
* @author therion 5 at hotmail
*/
function dateTime()
{
$args = func_get_args();
switch(count($args)) {
case 0: // no args = now!
$datetime = date('Y-m-d G:i:s', mktime());
case 1:
// continue on from 0 args.
if (!isset($datetime)) {
$datetime = $args[0];
}
$parts = explode(' ', $datetime);
$bits = explode('-', $parts[0]);
$bits = array_merge($bits, explode(':', $parts[1]));
break;
default: // 2 or more..
$bits = $args;
}
if (count($bits) != 6) {
// PEAR ERROR?
return false;
}
$r = DB_DataObject_Cast::date($bits[0], $bits[1], $bits[2]);
if (!$r) {
return $r; // pass thru error (False) - doesnt happen at present!
}
// change the type!
$r->type = 'datetime';
// should we mathematically sort this out..
// (or just assume that no-one's dumb enough to enter 26:90:90 as a time!
$r->hour = $bits[3];
$r->minute = $bits[4];
$r->second = $bits[5];
return $r;
}
/**
* time Constructor
*
* create a Cast object from a Date/Time
* Maybe should accept a Date object.!
* NO VALIDATION DONE, and no-recalcing done!
*
* @param vargs... accepts
* noargs (now)
* HH:MM:SS (Iso)
* array(HH,MM,SS)
*
*
* @return object DB_DataObject_Cast
* @access public
* @author therion 5 at hotmail
*/
function time()
{
$args = func_get_args();
switch (count($args)) {
case 0: // no args = now!
$time = date('G:i:s', mktime());
case 1:
// continue on from 0 args.
if (!isset($time)) {
$time = $args[0];
}
$bits = explode(':', $time);
break;
default: // 2 or more..
$bits = $args;
}
if (count($bits) != 3) {
return false;
}
// now take data from bits into object fields
$r = new DB_DataObject_Cast;
$r->type = 'time';
$r->hour = $bits[0];
$r->minute = $bits[1];
$r->second = $bits[2];
return $r;
}
/**
* get the string to use in the SQL statement for this...
*
*
* @param int $to Type (DB_DATAOBJECT_*
* @param object $db DB Connection Object
*
*
* @return string
* @access public
*/
function toString($to=false,$db)
{
// if $this->type is not set, we are in serious trouble!!!!
// values for to:
$method = 'toStringFrom'.$this->type;
return $this->$method($to,$db);
}
/**
* get the string to use in the SQL statement from a blob of binary data
* ** Suppots only blob->postgres::bytea
*
* @param int $to Type (DB_DATAOBJECT_*
* @param object $db DB Connection Object
*
*
* @return string
* @access public
*/
function toStringFromBlob($to,$db)
{
// first weed out invalid casts..
// in blobs can only be cast to blobs.!
// perhaps we should support TEXT fields???
if (!($to & DB_DATAOBJECT_BLOB)) {
return PEAR::raiseError('Invalid Cast from a DB_DataObject_Cast::blob to something other than a blob!');
}
switch ($db->dsn["phptype"]) {
case 'pgsql':
return "'".pg_escape_bytea($this->value)."'::bytea";
case 'mysql':
return "'".mysql_real_escape_string($this->value,$db->connection)."'";
case 'mysqli':
// this is funny - the parameter order is reversed ;)
return "'".mysqli_real_escape_string($db->connection, $this->value)."'";
default:
return PEAR::raiseError("DB_DataObject_Cast cant handle blobs for Database:{$db->dsn['phptype']} Yet");
}
}
/**
* get the string to use in the SQL statement for a blob from a string!
* ** Suppots only string->postgres::bytea
*
*
* @param int $to Type (DB_DATAOBJECT_*
* @param object $db DB Connection Object
*
*
* @return string
* @access public
*/
function toStringFromString($to,$db)
{
// first weed out invalid casts..
// in blobs can only be cast to blobs.!
// perhaps we should support TEXT fields???
//
if (!($to & DB_DATAOBJECT_BLOB)) {
return PEAR::raiseError('Invalid Cast from a DB_DataObject_Cast::string to something other than a blob!'.
' (why not just use native features)');
}
switch ($db->dsn['phptype']) {
case 'pgsql':
return "'".pg_escape_string($this->value)."'::bytea";
case 'mysql':
return "'".mysql_real_escape_string($this->value,$db->connection)."'";
case 'mysqli':
return "'".mysqli_real_escape_string($db->connection, $this->value)."'";
default:
return PEAR::raiseError("DB_DataObject_Cast cant handle blobs for Database:{$db->dsn['phptype']} Yet");
}
}
/**
* get the string to use in the SQL statement for a date
*
*
*
* @param int $to Type (DB_DATAOBJECT_*
* @param object $db DB Connection Object
*
*
* @return string
* @access public
*/
function toStringFromDate($to,$db)
{
// first weed out invalid casts..
// in blobs can only be cast to blobs.!
// perhaps we should support TEXT fields???
//
if (($to !== false) && !($to & DB_DATAOBJECT_DATE)) {
return PEAR::raiseError('Invalid Cast from a DB_DataObject_Cast::string to something other than a date!'.
' (why not just use native features)');
}
return "'{$this->year}-{$this->month}-{$this->day}'";
}
/**
* get the string to use in the SQL statement for a datetime
*
*
*
* @param int $to Type (DB_DATAOBJECT_*
* @param object $db DB Connection Object
*
*
* @return string
* @access public
* @author therion 5 at hotmail
*/
function toStringFromDateTime($to,$db)
{
// first weed out invalid casts..
// in blobs can only be cast to blobs.!
// perhaps we should support TEXT fields???
if (($to !== false) &&
!($to & (DB_DATAOBJECT_DATE + DB_DATAOBJECT_TIME))) {
return PEAR::raiseError('Invalid Cast from a ' .
' DB_DataObject_Cast::dateTime to something other than a datetime!' .
' (try using native features)');
}
return "'{$this->year}-{$this->month}-{$this->day} {$this->hour}:{$this->minute}:{$this->second}'";
}
/**
* get the string to use in the SQL statement for a time
*
*
*
* @param int $to Type (DB_DATAOBJECT_*
* @param object $db DB Connection Object
*
*
* @return string
* @access public
* @author therion 5 at hotmail
*/
function toStringFromTime($to,$db)
{
// first weed out invalid casts..
// in blobs can only be cast to blobs.!
// perhaps we should support TEXT fields???
if (($to !== false) && !($to & DB_DATAOBJECT_TIME)) {
return PEAR::raiseError('Invalid Cast from a' .
' DB_DataObject_Cast::time to something other than a time!'.
' (try using native features)');
}
return "'{$this->hour}:{$this->minute}:{$this->second}'";
}
/**
* get the string to use in the SQL statement for a raw sql statement.
*
* @param int $to Type (DB_DATAOBJECT_*
* @param object $db DB Connection Object
*
*
* @return string
* @access public
*/
function toStringFromSql($to,$db)
{
return $this->value;
}
}
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