# -*- Mode: perl; indent-tabs-mode: nil -*-
#
# The contents of this file are subject to the Mozilla Public
# License Version 1.1 (the "License"); you may not use this file
# except in compliance with the License. You may obtain a copy of
# the License at http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS
# IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
# implied. See the License for the specific language governing
# rights and limitations under the License.
#
# The Original Code is the Bugzilla Bug Tracking System.
#
# Contributor(s): Max Kanat-Alexander <mkanat@bugzilla.org>

use strict;

package Bugzilla::Keyword;

use base qw(Bugzilla::Object);

use Bugzilla::Error;
use Bugzilla::Util;

###############################
####    Initialization     ####
###############################

use constant IS_CONFIG => 1;

use constant DB_COLUMNS => qw(
   keyworddefs.id
   keyworddefs.name
   keyworddefs.description
   keyworddefs.is_active
);

use constant DB_TABLE => 'keyworddefs';

use constant VALIDATORS => {
    name        => \&_check_name,
    description => \&_check_description,
    is_active   => \&_check_is_active,
};

use constant UPDATE_COLUMNS => qw(
    name
    description
    is_active
);

###############################
####      Accessors      ######
###############################

sub description       { return $_[0]->{'description'}; }

sub bug_count {
    my ($self) = @_;
    return $self->{'bug_count'} if defined $self->{'bug_count'};
    ($self->{'bug_count'}) =
      Bugzilla->dbh->selectrow_array(
          'SELECT COUNT(*) FROM keywords WHERE keywordid = ?', 
          undef, $self->id);
    return $self->{'bug_count'};
}

###############################
####       Mutators       #####
###############################

sub set_name        { $_[0]->set('name', $_[1]); }
sub set_description { $_[0]->set('description', $_[1]); }
sub set_is_active   { $_[0]->set('is_active', $_[1]); }

###############################
####      Subroutines    ######
###############################

sub get_all_with_bug_count {
    my $class = shift;
    my $dbh = Bugzilla->dbh;
    my $keywords =
      $dbh->selectall_arrayref('SELECT ' 
                                      . join(', ', $class->_get_db_columns) . ',
                                       COUNT(keywords.bug_id) AS bug_count
                                  FROM keyworddefs
                             LEFT JOIN keywords
                                    ON keyworddefs.id = keywords.keywordid ' .
                                  $dbh->sql_group_by('keyworddefs.id',
                                                     'keyworddefs.name,
                                                      keyworddefs.description') . '
                                 ORDER BY keyworddefs.name', {'Slice' => {}});
    if (!$keywords) {
        return [];
    }
    
    foreach my $keyword (@$keywords) {
        bless($keyword, $class);
    }
    return $keywords;
}

###############################
###       Validators        ###
###############################

sub _check_name {
    my ($self, $name) = @_;

    $name = trim($name);
    if (!defined $name or $name eq "") {
        ThrowUserError("keyword_blank_name");
    }
    if ($name =~ /[\s,]/) {
        ThrowUserError("keyword_invalid_name");
    }

    # We only want to validate the non-existence of the name if
    # we're creating a new Keyword or actually renaming the keyword.
    if (!ref($self) || $self->name ne $name) {
        my $keyword = new Bugzilla::Keyword({ name => $name });
        ThrowUserError("keyword_already_exists", { name => $name }) if $keyword;
    }

    return $name;
}

sub _check_description {
    my ($self, $desc) = @_;
    $desc = trim($desc);
    if (!defined $desc or $desc eq '') {
        ThrowUserError("keyword_blank_description");
    }
    return $desc;
}

sub _check_is_active { return $_[1] ? 1 : 0 }

sub is_active { return $_[0]->{is_active} }

1;

__END__

=head1 NAME

Bugzilla::Keyword - A Keyword that can be added to a bug.

=head1 SYNOPSIS

 use Bugzilla::Keyword;

 my $description = $keyword->description;

 my $keywords = Bugzilla::Keyword->get_all_with_bug_count();

=head1 DESCRIPTION

Bugzilla::Keyword represents a keyword that can be added to a bug.

This implements all standard C<Bugzilla::Object> methods. See 
L<Bugzilla::Object> for more details.

=head1 METHODS

This is only a list of methods specific to C<Bugzilla::Keyword>.
See L<Bugzilla::Object> for more methods that this object
implements.

=over

=item C<get_all_with_bug_count()> 

 Description: Returns all defined keywords. This is an efficient way
              to get the associated bug counts, as only one SQL query
              is executed with this method, instead of one per keyword
              when calling get_all and then bug_count.
 Params:      none
 Returns:     A reference to an array of Keyword objects, or an empty
              arrayref if there are no keywords.

=item C<is_active>

 Description: Indicates if the keyword may be used on a bug
 Params:      none
 Returns:     a boolean value that is true if the keyword can be applied to bugs.

=item C<set_is_active($is_active)>

 Description: Set the is_active property to a boolean value
 Params:      the new value of the is_active property.
 Returns:     nothing

=back

=cut