package Test::Chimps::Server::Lister;

use warnings;
use strict;

use Params::Validate qw<:all>;
use Test::Chimps::Report;
use HTML::Mason;
use DateTime;

=head1 NAME

Test::Chimps::Server::Lister - Format the list of smoke reports

=head1 SYNOPSIS

This module encapsulates the formatting and output of the smoke
report list.  You should not have to use this module directly
unless you need to customize listing output.  To do so, subclass
C<Lister> and pass one to your C<Server>.

    package MyLister;
    
    use base 'Test::Chimps::Server::Lister';
    
    sub foo { ... }
    
    package main;
    
    use Test::Chimps::Server;
    
    my $lister = MyLister->new();
    
    my $server = Test::Chimps::Server->new(
      base_dir => '/var/www/smokes',
      lister   => $lister
    );
    
    $server->handle_request;

=head1 METHODS

=cut

use base qw/Class::Accessor/;

__PACKAGE__->mk_ro_accessors(
  qw/max_reports_per_subcategory list_template/
);


=head2 new

Returns a new Lister object

=cut

sub new {
  my $class = shift;
  my $obj = bless {}, $class;
  $obj->_init(@_);
  return $obj;
}

sub _init {
  my $self = shift;
  my %args = validate_with(
    params => \@_,
    called => 'The Test::Chimps::Server::Lister constructor',
    spec   => {
      list_template => {
        type     => SCALAR,
        optional => 0,
      },
      max_reports_per_subcategory => {
        type     => SCALAR,
        optional => 0
      }
    }
  );

  foreach my $key (keys %args) {
    $self->{$key} = $args{$key};
  }
}

=head2 output_list

Output the smoke report listing.

=cut

sub output_list {
  my ($self, $template_dir, $reports, $cgi) = @_;

  my $interp = HTML::Mason::Interp->new(comp_root => $template_dir);

  my $categories = $self->_build_heirarchy($reports);

  $interp->exec(File::Spec->catfile(File::Spec->rootdir,
                                    $self->list_template),
                categories => $categories,
                cgi => $cgi);
}

sub _build_heirarchy {
  my $self = shift;
  my $reports = shift;

  my $categories = {};
  foreach my $report (@$reports) {
    my $category = $self->_compute_category($report);
    my $subcategory = $self->_compute_subcategory($report);
    push @{$categories->{$category}->{$subcategory}}, $report;
  }
  $self->_sort_reports($categories);
  $self->_prune_reports($categories);
  return $categories;
}

sub _compute_category {
  my $self = shift;
  my $report = shift;
  return $report->project;
}

sub _compute_subcategory {
  my $self = shift;
  my $report = shift;
  return '';
}

sub _sort_reports {
  my $self = shift;
  my $categories = shift;

  foreach my $category (keys %$categories) {
    foreach my $subcategory (keys %{$categories->{$category}}) {
      @{$categories->{$category}->{$subcategory}} =
        sort _by_revision_then_date @{$categories->{$category}->{$subcategory}};
    }
  }
}

sub _by_revision_then_date {
  my $res = $b->revision <=> $a->revision;

  if ($res != 0) {
    return $res;
  }
  
  return DateTime->compare($b->timestamp, $a->timestamp);
}

sub _prune_reports {
  my $self = shift;
  my $categories = shift;

  foreach my $category (keys %$categories) {
    foreach my $subcategory (keys %{$categories->{$category}}) {
      if (scalar @{$categories->{$category}->{$subcategory}} >
          $self->max_reports_per_subcategory)
        {
          @{$categories->{$category}->{$subcategory}} =
            @{$categories->{$category}->{$subcategory}}[0 .. ($self->max_reports_per_subcategory - 1)];
        }
    }
  }
}

=head1 AUTHOR

Zev Benjamin, C<< <zev at cpan.org> >>

=head1 BUGS

Please report any bugs or feature requests to
C<bug-test-chimps at rt.cpan.org>, or through the web interface at
L<http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Test-Chimps>.
I will be notified, and then you'll automatically be notified of progress on
your bug as I make changes.

=head1 SUPPORT

You can find documentation for this module with the perldoc command.

    perldoc Test::Chimps

You can also look for information at:

=over 4

=item * Mailing list

Chimps has a mailman mailing list at
L<chimps@bestpractical.com>.  You can subscribe via the web
interface at
L<http://lists.bestpractical.com/cgi-bin/mailman/listinfo/chimps>.

=item * AnnoCPAN: Annotated CPAN documentation

L<http://annocpan.org/dist/Test-Chimps>

=item * CPAN Ratings

L<http://cpanratings.perl.org/d/Test-Chimps>

=item * RT: CPAN's request tracker

L<http://rt.cpan.org/NoAuth/Bugs.html?Dist=Test-Chimps>

=item * Search CPAN

L<http://search.cpan.org/dist/Test-Chimps>

=back

=head1 COPYRIGHT & LICENSE

Copyright 2006 Best Practical Solutions.

This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.

=cut

1;