# -*- 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.
#
# The Initial Developer of the Original Code is Netscape Communications
# Corporation. Portions created by Netscape are
# Copyright (C) 1998 Netscape Communications Corporation. All
# Rights Reserved.
#
# Contributor(s): Joel Peshkin <bugreport@peshkin.net>
#                 Erik Stambaugh <erik@dasbistro.com>
#                 Tiago R. Mello <timello@async.com.br>
#                 Max Kanat-Alexander <mkanat@bugzilla.org>

use strict;

package Bugzilla::Group;

use base qw(Bugzilla::Object);

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

###############################
##### Module Initialization ###
###############################

use constant DB_COLUMNS => qw(
    groups.id
    groups.name
    groups.description
    groups.isbuggroup
    groups.userregexp
    groups.isactive
);

use constant DB_TABLE => 'groups';

use constant LIST_ORDER => 'isbuggroup, name';

use constant VALIDATORS => {
    name        => \&_check_name,
    description => \&_check_description,
    userregexp  => \&_check_user_regexp,
    isbuggroup  => \&_check_is_bug_group,
};

use constant REQUIRED_CREATE_FIELDS => qw(name description isbuggroup);

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

sub description  { return $_[0]->{'description'};  }
sub is_bug_group { return $_[0]->{'isbuggroup'};   }
sub user_regexp  { return $_[0]->{'userregexp'};   }
sub is_active    { return $_[0]->{'isactive'};     }

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

sub _rederive_regexp {
    my ($self) = @_;
    RederiveRegexp($self->user_regexp, $self->id);
}

################################
#####  Module Subroutines    ###
################################

sub create {
    my $class = shift;
    my ($params) = @_;
    my $dbh = Bugzilla->dbh;

    print get_text('install_group_create', { name => $params->{name} }) . "\n" 
        if Bugzilla->usage_mode == USAGE_MODE_CMDLINE;

    my $group = $class->SUPER::create(@_);

    # Since we created a new group, give the "admin" group all privileges
    # initially.
    my $admin = new Bugzilla::Group({name => 'admin'});
    # This function is also used to create the "admin" group itself,
    # so there's a chance it won't exist yet.
    if ($admin) {
        my $sth = $dbh->prepare('INSERT INTO group_group_map
                                 (member_id, grantor_id, grant_type)
                                 VALUES (?, ?, ?)');
        $sth->execute($admin->id, $group->id, GROUP_MEMBERSHIP);
        $sth->execute($admin->id, $group->id, GROUP_BLESS);
        $sth->execute($admin->id, $group->id, GROUP_VISIBLE);
    }

    $group->_rederive_regexp() if $group->user_regexp;
    return $group;
}

sub ValidateGroupName {
    my ($name, @users) = (@_);
    my $dbh = Bugzilla->dbh;
    my $query = "SELECT id FROM groups " .
                "WHERE name = ?";
    if (Bugzilla->params->{'usevisibilitygroups'}) {
        my @visible = (-1);
        foreach my $user (@users) {
            $user && push @visible, @{$user->visible_groups_direct};
        }
        my $visible = join(', ', @visible);
        $query .= " AND id IN($visible)";
    }
    my $sth = $dbh->prepare($query);
    $sth->execute($name);
    my ($ret) = $sth->fetchrow_array();
    return $ret;
}

# This sub is not perldoc'ed because we expect it to go away and
# just become the _rederive_regexp private method.
sub RederiveRegexp {
    my ($regexp, $gid) = @_;
    my $dbh = Bugzilla->dbh;
    my $sth = $dbh->prepare("SELECT userid, login_name, group_id
                               FROM profiles
                          LEFT JOIN user_group_map
                                 ON user_group_map.user_id = profiles.userid
                                AND group_id = ?
                                AND grant_type = ?
                                AND isbless = 0");
    my $sthadd = $dbh->prepare("INSERT INTO user_group_map
                                 (user_id, group_id, grant_type, isbless)
                                 VALUES (?, ?, ?, 0)");
    my $sthdel = $dbh->prepare("DELETE FROM user_group_map
                                 WHERE user_id = ? AND group_id = ?
                                 AND grant_type = ? and isbless = 0");
    $sth->execute($gid, GRANT_REGEXP);
    while (my ($uid, $login, $present) = $sth->fetchrow_array()) {
        if (($regexp =~ /\S+/) && ($login =~ m/$regexp/i))
        {
            $sthadd->execute($uid, $gid, GRANT_REGEXP) unless $present;
        } else {
            $sthdel->execute($uid, $gid, GRANT_REGEXP) if $present;
        }
    }
}

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

sub _check_name {
    my ($invocant, $name) = @_;
    $name = trim($name);
    $name || ThrowUserError("empty_group_name");
    my $exists = new Bugzilla::Group({name => $name });
    ThrowUserError("group_exists", { name => $name }) if $exists;
    return $name;
}

sub _check_description {
    my ($invocant, $desc) = @_;
    $desc = trim($desc);
    $desc || ThrowUserError("empty_group_description");
    return $desc;
}

sub _check_user_regexp {
    my ($invocant, $regex) = @_;
    $regex = trim($regex) || '';
    ThrowUserError("invalid_regexp") unless (eval {qr/$regex/});
    return $regex;
}

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

__END__

=head1 NAME

Bugzilla::Group - Bugzilla group class.

=head1 SYNOPSIS

    use Bugzilla::Group;

    my $group = new Bugzilla::Group(1);
    my $group = new Bugzilla::Group({name => 'AcmeGroup'});

    my $id           = $group->id;
    my $name         = $group->name;
    my $description  = $group->description;
    my $user_reg_exp = $group->user_reg_exp;
    my $is_active    = $group->is_active;

    my $group_id = Bugzilla::Group::ValidateGroupName('admin', @users);
    my @groups   = Bugzilla::Group->get_all;

=head1 DESCRIPTION

Group.pm represents a Bugzilla Group object. It is an implementation
of L<Bugzilla::Object>, and thus has all the methods that L<Bugzilla::Object>
provides, in addition to any methods documented below.

=head1 SUBROUTINES

=over

=item C<create>

Note that in addition to what L<Bugzilla::Object/create($params)>
normally does, this function also makes the new group be inherited
by the C<admin> group. That is, the C<admin> group will automatically
be a member of this group.

=item C<ValidateGroupName($name, @users)>

 Description: ValidateGroupName checks to see if ANY of the users
              in the provided list of user objects can see the
              named group.

 Params:      $name - String with the group name.
              @users - An array with Bugzilla::User objects.

 Returns:     It returns the group id if successful
              and undef otherwise.

=back