package RTx::Calendar;

use strict;
use DateTime;
use DateTime::Set;

our $VERSION = "1.00";

RT->AddStyleSheets('calendar.css');

sub FirstDay {
    my ($year, $month, $matchday) = @_;
    my $set = DateTime::Set->from_recurrence(
	next => sub { $_[0]->truncate( to => 'day' )->subtract( days => 1 ) }
    );

    my $day = DateTime->new( year => $year, month => $month );

    $day = $set->next($day) while $day->day_of_week != $matchday;
    $day;

}

sub LastDay {
    my ($year, $month, $matchday) = @_;
    my $set = DateTime::Set->from_recurrence(
	next => sub { $_[0]->truncate( to => 'day' )->add( days => 1 ) }
    );

    my $day = DateTime->last_day_of_month( year => $year, month => $month );

    $day = $set->next($day) while $day->day_of_week != $matchday;
    $day;
}

# we can't use RT::Date::Date because it uses gmtime
# and we need localtime
sub LocalDate {
  my $ts = shift;
  my ($d,$m,$y) = (localtime($ts))[3..5];
  sprintf "%4d-%02d-%02d", ($y + 1900), ++$m, $d;
}

sub DatesClauses {
    my ($Dates, $begin, $end) = @_;

    my $clauses = "";

    my @DateClauses = map {
	"($_ >= '" . $begin . " 00:00:00' AND $_ <= '" . $end . " 23:59:59')"
    } @$Dates;
    $clauses  .= " AND " . " ( " . join(" OR ", @DateClauses) . " ) "
	if @DateClauses;

    return $clauses
}

sub FindTickets {
    my ($CurrentUser, $Query, $Dates, $begin, $end) = @_;

    $Query .= DatesClauses($Dates, $begin, $end)
	if $begin and $end;

    my $Tickets = RT::Tickets->new($CurrentUser);
    $Tickets->FromSQL($Query);

    my %Tickets;
    my %AlreadySeen;

    while ( my $Ticket = $Tickets->Next()) {

	# How to find the LastContacted date ?
	for my $Date (@$Dates) {
	    my $DateObj = $Date . "Obj";
	    push @{ $Tickets{ LocalDate($Ticket->$DateObj->Unix) } }, $Ticket
		# if reminder, check it's refering to a ticket
		unless ($Ticket->Type eq 'reminder' and not $Ticket->RefersTo->First)
		    or $AlreadySeen{  LocalDate($Ticket->$DateObj->Unix) }{ $Ticket }++;
	}
    }
    return %Tickets;
}

#
# Take a user object and return the search with Description "calendar" if it exists
#
sub SearchDefaultCalendar {
    my $CurrentUser = shift;
    my $Description = "calendar";

    # I'm quite sure the loop isn't usefull but...
    my @Objects = $CurrentUser->UserObj;
    for my $object (@Objects) {
	next unless ref($object) eq 'RT::User' && $object->id == $CurrentUser->Id;
	my @searches = $object->Attributes->Named('SavedSearch');
	for my $search (@searches) {
	    next if ($search->SubValue('SearchType')
			 && $search->SubValue('SearchType') ne 'Ticket');

	    return $search
		if "calendar" eq $search->Description;
	}
    }
}

1;

__END__

=head1 NAME

RTx::Calendar - Calendar for RT due dates

=head1 DESCRIPTION

This RT extension provides a calendar view for your tickets and your
reminders so you see when is your next due ticket. You can find it in
the menu Search->Calendar.

There's a portlet to put on your home page (see Prefs/MyRT.html)

=head1 INSTALLATION

=over

=item C<perl Makefile.PL>

=item C<make>

=item C<make install>

May need root permissions

=item Edit your F</opt/rt4/etc/RT_SiteConfig.pm>

If you are using RT 4.2 or greater, add this line:

    Plugin('RTx::Calendar');

For RT 4.0, add this line:

    Set(@Plugins, qw(RTx::Calendar));

or add C<RTx::Calendar> to your existing C<@Plugins> line.

=item Clear your mason cache

    rm -rf /opt/rt4/var/mason_data/obj

=item Restart your webserver

=back

=head1 CONFIGURATION

=head2 Base configuration

To use the C<MyCalendar> portlet, you must add C<MyCalendar> to
C<$HomepageComponents> in F<etc/RT_SiteConfig.pm>:

  Set($HomepageComponents, [qw(QuickCreate Quicksearch MyCalendar
     MyAdminQueues MySupportQueues MyReminders RefreshHomepage)]);

=head2 Display configuration

You can show the owner in each day box by adding this line to your
F<etc/RT_SiteConfig.pm>:

    Set($CalendarDisplayOwner, 1);

You can change which fields show up in the popup display when you
mouse over a date in F<etc/RT_SiteConfig.pm>:

    Set(@CalendarPopupFields, ('Status', 'OwnerObj->Name', 'DueObj->ISO'));

=head1 USAGE

A small help section is available in /Prefs/Calendar.html

=head1 AUTHOR

Best Practical Solutions, LLC E<lt>modules@bestpractical.comE<gt>

Originally written by Nicolas Chuche E<lt>nchuche@barna.beE<gt>

=head1 BUGS

All bugs should be reported via email to

    L<bug-RTx-Calendar@rt.cpan.org|mailto:bug-RTx-Calendar@rt.cpan.org>

or via the web at

    L<rt.cpan.org|http://rt.cpan.org/Public/Dist/Display.html?Name=RTx-Calendar>.

=head1 LICENSE AND COPYRIGHT

This software is Copyright (c) 2010-2014 by Best Practical Solutions

Copyright 2007-2009 by Nicolas Chuche

This is free software, licensed under:

  The GNU General Public License, Version 2, June 1991

=cut