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- <?php
- /* vim: set expandtab tabstop=4 shiftwidth=4: */
- // +----------------------------------------------------------------------+
- // | PHP Version 4 |
- // +----------------------------------------------------------------------+
- // | Copyright (c) 1997-2002 The PHP Group |
- // +----------------------------------------------------------------------+
- // | This source file is subject to version 2.02 of the PHP license, |
- // | that is bundled with this package in the file LICENSE, and is |
- // | available at through the world-wide-web at |
- // | http://www.php.net/license/2_02.txt. |
- // | If you did not receive a copy of the PHP license and are unable to |
- // | obtain it through the world-wide-web, please send a note to |
- // | license@php.net so we can mail you a copy immediately. |
- // +----------------------------------------------------------------------+
- // | Authors: Alan Knowles <alan@akbkhome.com> |
- // +----------------------------------------------------------------------+
- //
- // $Id: Cast.php,v 1.6 2004/06/05 02:32:34 alan_k Exp $
- //
- // Prototype Castable Object.. for DataObject queries
- //
-
- /**
- *
- * @abstract Storage for Data that may be cast into a variety of formats.
- *
- * 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');
- * }
- *
- *
- *
- *
- * @version $Id: Cast.php,v 1.6 2004/06/05 02:32:34 alan_k Exp $
- */
- 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)
- *
- *
- * @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]);
- }
- 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;
- }
-
- /**
- * get the string to use in the SQL statement for this...
- *
- *
- * @param int $to Type (DB_DATAOBJECT_*
- * @param string $db (eg. mysql|mssql.....)
- *
- *
- * @return string
- * @access public
- */
-
- function toString($to=false,$db='mysql') {
- // 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 string $db (eg. mysql|mssql.....)
- *
- *
- * @return string
- * @access public
- */
- function toStringFromBlob($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 ($db) {
- case 'pgsql':
- return "'".pg_escape_bytea($this->value)."'::bytea";
-
- default:
- return PEAR::raiseError("DB_DataObject_Cast cant handle blobs for Database:$db 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 string $db (eg. mysql|mssql.....)
- *
- *
- * @return string
- * @access public
- */
- function toStringFromString($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 ($db) {
- case 'pgsql':
- return "'".pg_escape_string($this->value)."'::bytea";
-
- default:
- return PEAR::raiseError("DB_DataObject_Cast cant handle blobs for Database:$db Yet");
- }
-
- }
-
-
- /**
- * get the string to use in the SQL statement for a date
- *
- *
- *
- * @param int $to Type (DB_DATAOBJECT_*
- * @param string $db (eg. mysql|mssql.....)
- *
- *
- * @return string
- * @access public
- */
- function toStringFromDate($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 raw sql statement.
- *
- * @param int $to Type (DB_DATAOBJECT_*
- * @param string $db (eg. mysql|mssql.....)
- *
- *
- * @return string
- * @access public
- */
- function toStringFromSql($to,$db) {
- return $this->value;
- }
-
-
-
-
- }
-
-