[Koha-cvs] CVS: koha/C4/Circulation Date.pm,NONE,1.1

[Chris Cormack]

Update of /cvsroot/koha/koha/C4/Circulation
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv3578

Added Files:
	Date.pm 
Log Message:
This is currently a copy of C4::Date

But C4::Date uses Date::Manip, which in the authors own words

"If you look in CPAN, you'll find that there are a number of Date and Time packages.  Is Date::Manip the one you should be using?  In my
opinion, the answer is no most of the time."

He goes on to say, that because Date::Manip is powerful and is written fully in perl its also slow.
Now Circulation needs to be as fast as possible. And C4::Date isnt actually doing anything particularly tricky, 
So im working on C4::Circulation::Date to be a replacement, in an attempt to win some speed



--- NEW FILE ---
#!/usr/bin/perl -w

package C4::Circulation::Date;

# $Id:

# Copyright 2005 Katipo Communications                                                                                                                            
#                                                                                                                                                                      
# This file is part of Koha.                                                                                                                                           
#                                                                                                                                                                      
# Koha is free software; you can redistribute it and/or modify it under the                                                                                            
# terms of the GNU General Public License as published by the Free Software                                                                                            
# Foundation; either version 2 of the License, or (at your option) any later                                                                                           
# version.                                                                                                                                                             
#                                                                                                                                                                      
# Koha is distributed in the hope that it will be useful, but WITHOUT ANY                                                                                              
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR                                                                                        
# A PARTICULAR PURPOSE.  See the GNU General Public License for more details.                                                                                          
#                                                                                                                                                                      
# You should have received a copy of the GNU General Public License along with                                                                                         
# Koha; if not, write to the Free Software Foundation, Inc., 59 Temple Place,                                                                                          
# Suite 330, Boston, MA  02111-1307 USA 

use strict;
use C4::Context;
use Date::Manip;

require Exporter;

use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);

$VERSION = do { my @v = '$Revision: 1.1 $' =~ /\d+/g;                                                                                                                 
                    shift(@v) . "." . join("_", map {sprintf "%03d", $_ } @v); };;

@ISA = qw(Exporter);

@EXPORT = qw(
             &display_date_format
             &format_date
             &format_date_in_iso
);


sub get_date_format
{
	#Get the database handle
	my $dbh = C4::Context->dbh;
	return C4::Context->preference('dateformat');
}

sub display_date_format
{
	my $dateformat = get_date_format();

	if ( $dateformat eq "us" )
	{
		return "mm/dd/yyyy";
	}
	elsif ( $dateformat eq "metric" )
	{
		return "dd/mm/yyyy";
	}
	elsif ( $dateformat eq "iso" )
	{
		return "yyyy-mm-dd";
	}
	else
	{
		return "Invalid date format: $dateformat. Please change in system preferences";
	}
}


sub format_date
{
	my $olddate = shift;
	my $newdate;

	if ( ! $olddate )
	{
		return "";
	}

	my $dateformat = get_date_format();

	if ( $dateformat eq "us" )
	{
		Date_Init("DateFormat=US");
		$olddate = ParseDate($olddate);
		$newdate = UnixDate($olddate,'%m/%d/%Y');
	}
	elsif ( $dateformat eq "metric" )
	{
		Date_Init("DateFormat=metric");
		$olddate = ParseDate($olddate);
		$newdate = UnixDate($olddate,'%d/%m/%Y');
	}
	elsif ( $dateformat eq "iso" )
	{
		Date_Init("DateFormat=iso");
		$olddate = ParseDate($olddate);
		$newdate = UnixDate($olddate,'%Y-%m-%d');
	}
	else
	{
		return "Invalid date format: $dateformat. Please change in system preferences";
	}
}

sub format_date_in_iso
{
        my $olddate = shift;
        my $newdate;

        if ( ! $olddate )
        {
                return "";
        }
                
        my $dateformat = get_date_format();

        if ( $dateformat eq "us" )
        {
                Date_Init("DateFormat=US");
                $olddate = ParseDate($olddate);
        }
        elsif ( $dateformat eq "metric" )
        {
                Date_Init("DateFormat=metric");
                $olddate = ParseDate($olddate);
        }
        elsif ( $dateformat eq "iso" )
        {
                Date_Init("DateFormat=iso");
                $olddate = ParseDate($olddate);
        }
        else
        {
                return "9999-99-99";
        }

	$newdate = UnixDate($olddate, '%Y-%m-%d');

	return $newdate;
}
1;