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# -*- 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): Tiago R. Mello <timello@async.com.br>

use strict;

package Bugzilla::Product;

use Bugzilla::Version;
use Bugzilla::Milestone;

use Bugzilla::Constants;
use Bugzilla::Util;
use Bugzilla::Group;
use Bugzilla::Error;

use Bugzilla::Install::Requirements;

use base qw(Bugzilla::Object);

use constant DEFAULT_CLASSIFICATION_ID => 1;

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

use constant DB_TABLE => 'products';

use constant DB_COLUMNS => qw(
   products.id
   products.name
   products.classification_id
   products.description
   products.milestoneurl
   products.disallownew
   products.votesperuser
   products.maxvotesperbug
   products.votestoconfirm
   products.defaultmilestone
);

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

# This is considerably faster than calling new_from_list three times
# for each product in the list, particularly with hundreds or thousands
# of products.
sub preload {
    my ($products) = @_;
    my %prods = map { $_->id => $_ } @$products;
    my @prod_ids = keys %prods;
    return unless @prod_ids;

    my $dbh = Bugzilla->dbh;
    foreach my $field (qw(component version milestone)) {
        my $classname = "Bugzilla::" . ucfirst($field);
        my $objects = $classname->match({ product_id => \@prod_ids });

        # Now populate the products with this set of objects.
        foreach my $obj (@$objects) {
            my $product_id = $obj->product_id;
            $prods{$product_id}->{"${field}s"} ||= [];
            push(@{$prods{$product_id}->{"${field}s"}}, $obj);
        }
    }
}

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

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

    if (!defined $self->{components}) {
        my $ids = $dbh->selectcol_arrayref(q{
            SELECT id FROM components
            WHERE product_id = ?
            ORDER BY name}, undef, $self->id);

        require Bugzilla::Component;
        $self->{components} = Bugzilla::Component->new_from_list($ids);
    }
    return $self->{components};
}

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

    if (!defined $self->{group_controls}) {
        my $query = qq{SELECT
                       groups.id,
                       group_control_map.entry,
                       group_control_map.membercontrol,
                       group_control_map.othercontrol,
                       group_control_map.canedit,
                       group_control_map.editcomponents,
                       group_control_map.editbugs,
                       group_control_map.canconfirm
                  FROM groups
                  LEFT JOIN group_control_map
                        ON groups.id = group_control_map.group_id
                  WHERE group_control_map.product_id = ?
                  AND   groups.isbuggroup != 0
                  ORDER BY groups.name};
        $self->{group_controls} = 
            $dbh->selectall_hashref($query, 'id', undef, $self->id);
        foreach my $group (keys(%{$self->{group_controls}})) {
            $self->{group_controls}->{$group}->{'group'} = 
                new Bugzilla::Group($group);
        }
    }
    return $self->{group_controls};
}

sub groups_mandatory_for {
    my ($self, $user) = @_;
    my $groups = $user->groups_as_string;
    my $mandatory = CONTROLMAPMANDATORY;
    # For membercontrol we don't check group_id IN, because if membercontrol
    # is Mandatory, the group is Mandatory for everybody, regardless of their
    # group membership.
    my $ids = Bugzilla->dbh->selectcol_arrayref(
        "SELECT group_id FROM group_control_map
          WHERE product_id = ?
                AND (membercontrol = $mandatory
                     OR (othercontrol = $mandatory
                         AND group_id NOT IN ($groups)))",
        undef, $self->id);
    return Bugzilla::Group->new_from_list($ids);
}

sub groups_valid {
    my ($self) = @_;
    return $self->{groups_valid} if defined $self->{groups_valid};
    
    # Note that we don't check OtherControl below, because there is no
    # valid NA/* combination.
    my $ids = Bugzilla->dbh->selectcol_arrayref(
        "SELECT DISTINCT group_id
          FROM group_control_map AS gcm
               INNER JOIN groups ON gcm.group_id = groups.id
         WHERE product_id = ? AND isbuggroup = 1
               AND membercontrol != " . CONTROLMAPNA,  undef, $self->id);
    $self->{groups_valid} = Bugzilla::Group->new_from_list($ids);
    return $self->{groups_valid};
}

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

    if (!defined $self->{versions}) {
        my $ids = $dbh->selectcol_arrayref(q{
            SELECT id FROM versions
            WHERE product_id = ?}, undef, $self->id);

        $self->{versions} = Bugzilla::Version->new_from_list($ids);
    }
    return $self->{versions};
}

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

    if (!defined $self->{milestones}) {
        my $ids = $dbh->selectcol_arrayref(q{
            SELECT id FROM milestones
             WHERE product_id = ?}, undef, $self->id);
 
        $self->{milestones} = Bugzilla::Milestone->new_from_list($ids);
    }
    return $self->{milestones};
}

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

    if (!defined $self->{'bug_count'}) {
        $self->{'bug_count'} = $dbh->selectrow_array(qq{
            SELECT COUNT(bug_id) FROM bugs
            WHERE product_id = ?}, undef, $self->id);

    }
    return $self->{'bug_count'};
}

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

    if (!defined $self->{'bug_ids'}) {
        $self->{'bug_ids'} = 
            $dbh->selectcol_arrayref(q{SELECT bug_id FROM bugs
                                       WHERE product_id = ?},
                                     undef, $self->id);
    }
    return $self->{'bug_ids'};
}

sub user_has_access {
    my ($self, $user) = @_;

    return Bugzilla->dbh->selectrow_array(
        'SELECT CASE WHEN group_id IS NULL THEN 1 ELSE 0 END
           FROM products LEFT JOIN group_control_map
                ON group_control_map.product_id = products.id
                   AND group_control_map.entry != 0
                   AND group_id NOT IN (' . $user->groups_as_string . ')
          WHERE products.id = ? ' . Bugzilla->dbh->sql_limit(1),
          undef, $self->id);
}

sub flag_types {
    my $self = shift;

    if (!defined $self->{'flag_types'}) {
        $self->{'flag_types'} = {};
        foreach my $type ('bug', 'attachment') {
            my %flagtypes;
            foreach my $component (@{$self->components}) {
                foreach my $flagtype (@{$component->flag_types->{$type}}) {
                    $flagtypes{$flagtype->{'id'}} ||= $flagtype;
                }
            }
            $self->{'flag_types'}->{$type} = [sort { $a->{'sortkey'} <=> $b->{'sortkey'}
                                                    || $a->{'name'} cmp $b->{'name'} } values %flagtypes];
        }
    }
    return $self->{'flag_types'};
}

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

sub description       { return $_[0]->{'description'};       }
sub milestone_url     { return $_[0]->{'milestoneurl'};      }
sub disallow_new      { return $_[0]->{'disallownew'};       }
sub votes_per_user    { return $_[0]->{'votesperuser'};      }
sub max_votes_per_bug { return $_[0]->{'maxvotesperbug'};    }
sub votes_to_confirm  { return $_[0]->{'votestoconfirm'};    }
sub default_milestone { return $_[0]->{'defaultmilestone'};  }
sub classification_id { return $_[0]->{'classification_id'}; }

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

sub check_product {
    my ($product_name) = @_;

    unless ($product_name) {
        ThrowUserError('product_not_specified');
    }
    my $product = new Bugzilla::Product({name => $product_name});
    unless ($product) {
        ThrowUserError('product_doesnt_exist',
                       {'product' => $product_name});
    }
    return $product;
}

1;

__END__

=head1 NAME

Bugzilla::Product - Bugzilla product class.

=head1 SYNOPSIS

    use Bugzilla::Product;

    my $product = new Bugzilla::Product(1);
    my $product = new Bugzilla::Product({ name => 'AcmeProduct' });

    my @components      = $product->components();
    my $groups_controls = $product->group_controls();
    my @milestones      = $product->milestones();
    my @versions        = $product->versions();
    my $bugcount        = $product->bug_count();
    my $bug_ids         = $product->bug_ids();
    my $has_access      = $product->user_has_access($user);
    my $flag_types      = $product->flag_types();

    my $id               = $product->id;
    my $name             = $product->name;
    my $description      = $product->description;
    my $milestoneurl     = $product->milestone_url;
    my disallownew       = $product->disallow_new;
    my votesperuser      = $product->votes_per_user;
    my maxvotesperbug    = $product->max_votes_per_bug;
    my votestoconfirm    = $product->votes_to_confirm;
    my $defaultmilestone = $product->default_milestone;
    my $classificationid = $product->classification_id;

=head1 DESCRIPTION

Product.pm represents a product 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::Product> are listed 
below.

=head1 METHODS

=over

=item C<components>

 Description: Returns an array of component objects belonging to
              the product.

 Params:      none.

 Returns:     An array of Bugzilla::Component object.

=item C<group_controls()>

 Description: Returns a hash (group id as key) with all product
              group controls.

 Params:      none.

 Returns:     A hash with group id as key and hash containing 
              a Bugzilla::Group object and the properties of group
              relative to the product.

=item C<groups_mandatory_for>

=over

=item B<Description>

Tells you what groups are mandatory for bugs in this product.

=item B<Params>

C<$user> - The user who you want to check.

=item B<Returns> An arrayref of C<Bugzilla::Group> objects.

=back

=item C<groups_valid>

=over

=item B<Description>

Returns an arrayref of L<Bugzilla::Group> objects, representing groups
that bugs could validly be restricted to within this product. Used mostly
by L<Bugzilla::Bug> to assure that you're adding valid groups to a bug.

B<Note>: This doesn't check whether or not the current user can add/remove
bugs to/from these groups. It just tells you that bugs I<could be in> these
groups, in this product.

=item B<Params> (none)

=item B<Returns> An arrayref of L<Bugzilla::Group> objects.

=back

=item C<versions>

 Description: Returns all valid versions for that product.

 Params:      none.

 Returns:     An array of Bugzilla::Version objects.

=item C<milestones>

 Description: Returns all valid milestones for that product.

 Params:      none.

 Returns:     An array of Bugzilla::Milestone objects.

=item C<bug_count()>

 Description: Returns the total of bugs that belong to the product.

 Params:      none.

 Returns:     Integer with the number of bugs.

=item C<bug_ids()>

 Description: Returns the IDs of bugs that belong to the product.

 Params:      none.

 Returns:     An array of integer.

=item C<user_has_access()>

 Description: Tells you whether or not the user is allowed to enter
              bugs into this product, based on the C<entry> group
              control. To see whether or not a user can actually
              enter a bug into a product, use C<$user-&gt;can_enter_product>.

 Params:      C<$user> - A Bugzilla::User object.

 Returns      C<1> If this user's groups allow him C<entry> access to
              this Product, C<0> otherwise.

=item C<flag_types()>

 Description: Returns flag types available for at least one of
              its components.

 Params:      none.

 Returns:     Two references to an array of flagtype objects.

=back

=head1 SUBROUTINES

=over

=item C<preload>

When passed an arrayref of C<Bugzilla::Product> objects, preloads their
L</milestones>, L</components>, and L</versions>, which is much faster
than calling those accessors on every item in the array individually.

This function is not exported, so must be called like 
C<Bugzilla::Product::preload($products)>.

=item C<check_product($product_name)>

 Description: Checks if the product name was passed in and if is a valid
              product.

 Params:      $product_name - String with a product name.

 Returns:     Bugzilla::Product object.

=back

=head1 SEE ALSO

L<Bugzilla::Object>

=cut