# 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): Tiago R. Mello <timello@async.com.br>
#                 Frédéric Buclin <LpSolit@gmail.com>

use strict;

package Bugzilla::Classification;

use Bugzilla::Constants;
use Bugzilla::Util;
use Bugzilla::Error;
use Bugzilla::Product;

use base qw(Bugzilla::Field::Choice);

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

use constant DB_TABLE => 'classifications';
use constant FIELD_NAME => 'classification';

use constant NAME_FIELD => 'name';
use constant LIST_ORDER => 'sortkey, name';

use constant DB_COLUMNS => qw(
    id
    name
    description
    sortkey
);

use constant REQUIRED_CREATE_FIELDS => qw(
    name
);

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

use constant VALIDATORS => {
    name        => \&_check_name,
    description => \&_check_description,
    sortkey     => \&_check_sortkey,
};

use constant is_active => 1;

###############################
####     Constructors     #####
###############################

sub remove_from_db
{
    my $self = shift;
    my $dbh = Bugzilla->dbh;

    ThrowUserError("classification_not_deletable") if ($self->id == 1);

    $dbh->bz_start_transaction();

    # Reclassify products to the default classification, if needed.
    $dbh->do("UPDATE products SET classification_id=1 WHERE classification_id=?", undef, $self->id);
    my @dependent_fields = map { $_->id } Bugzilla->get_fields({ visibility_field_id => $self->field->id });
    if (@dependent_fields)
    {
        $dbh->do(
            "UPDATE fieldvaluecontrol SET visibility_value_id=1 WHERE field_id IN (".
            join(",", @dependent_fields).") AND visibility_value_id=?", undef, $self->id
        );
    }

    # Touch the field
    $self->SUPER::remove_from_db();

    $dbh->bz_commit_transaction();
}

sub is_default { 0 }
sub bug_count { 0 }

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

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

    $name = trim($name);
    $name || ThrowUserError('classification_not_specified');
    if (length($name) > MAX_FIELD_VALUE_SIZE)
    {
        ThrowUserError('classification_name_too_long', { name => $name });
    }

    my $classification = new Bugzilla::Classification({ name => $name });
    if ($classification && (!ref $invocant || $classification->id != $invocant->id))
    {
        ThrowUserError("classification_already_exists", { name => $classification->name });
    }
    return $name;
}

sub _check_description
{
    my ($invocant, $description) = @_;
    $description  = trim($description || '');
    return $description;
}

sub _check_sortkey
{
    my ($invocant, $sortkey) = @_;
    $sortkey ||= 0;
    if (!detaint_natural($sortkey) || $sortkey > MAX_SMALLINT)
    {
        ThrowUserError('classification_invalid_sortkey', { sortkey => $sortkey });
    }
    return $sortkey;
}

###############################
####       Methods         ####
###############################

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

sub product_count
{
    my $self = shift;
    my $dbh = Bugzilla->dbh;
    if (!defined $self->{product_count})
    {
        $self->{product_count} = $dbh->selectrow_array(
            'SELECT COUNT(*) FROM products WHERE classification_id = ?', undef, $self->id
        ) || 0;
    }
    return $self->{product_count};
}

sub products
{
    my $self = shift;
    my $dbh = Bugzilla->dbh;
    if (!$self->{products})
    {
        $self->{products} = Bugzilla::Product->_do_list_select('classification_id=?', [ $self->id ]);
    }
    return $self->{products};
}

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

sub description { $_[0]->{description} }
sub sortkey     { $_[0]->{sortkey}     }

# Return all visible classifications.
sub get_all { @{ Bugzilla->user->get_selectable_classifications } }

1;

__END__

=head1 NAME

Bugzilla::Classification - Bugzilla classification class.

=head1 SYNOPSIS

    use Bugzilla::Classification;

    my $classification = new Bugzilla::Classification(1);
    my $classification = new Bugzilla::Classification({name => 'Acme'});

    my $id = $classification->id;
    my $name = $classification->name;
    my $description = $classification->description;
    my $sortkey = $classification->sortkey;
    my $product_count = $classification->product_count;
    my $products = $classification->products;

=head1 DESCRIPTION

Classification.pm represents a classification object. It is an
implementation of L<Bugzilla::Object>, and thus provides all methods
that L<Bugzilla::Object> provides.

The methods that are specific to C<Bugzilla::Classification> are listed
below.

A Classification is a higher-level grouping of Products.

=head1 METHODS

=over

=item B<product_count()>

 Description: Returns the total number of products that belong to
              the classification.

 Params:      none.

 Returns:     Integer - The total of products inside the classification.

=item B<products>

 Description: Returns all products of the classification.

 Params:      none.

 Returns:     A reference to an array of Bugzilla::Product objects.

=back

=cut