path: root/extensions/Ember/lib/WebService.pm

# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

# This Source Code Form is "Incompatible With Secondary Licenses", as
# defined by the Mozilla Public License, v. 2.0.

package Bugzilla::Extension::Ember::WebService;

use 5.10.1;
use strict;
use warnings;

use parent qw(Bugzilla::WebService
              Bugzilla::WebService::Bug
              Bugzilla::WebService::Product);

use Bugzilla::Bug;
use Bugzilla::Component;
use Bugzilla::Product;
use Bugzilla::Constants;
use Bugzilla::Error;
use Bugzilla::Field;
use Bugzilla::Util qw(trick_taint);

use Bugzilla::Extension::Ember::FakeBug;

use Scalar::Util qw(blessed);
use Storable qw(dclone);

use constant PUBLIC_METHODS => qw(
    bug
    create
    get_attachments
    search
    show
);

use constant DATE_FIELDS => {
    show => ['last_updated'],
};

use constant FIELD_TYPE_MAP => {
    0  => 'unknown',
    1  => 'freetext',
    2  => 'single_select',
    3  => 'multiple_select',
    4  => 'textarea',
    5  => 'datetime',
    6  => 'date',
    7  => 'bug_id',
    8  => 'bug_urls',
    9  => 'keywords',
    99 => 'extension'
};

use constant NON_EDIT_FIELDS => qw(
    assignee_accessible
    bug_group
    bug_id
    commenter
    cclist_accessible
    content
    creation_ts
    days_elapsed
    everconfirmed
    qacontact_accessible
    reporter
    reporter_accessible
    restrict_comments
    tag
    votes
);

use constant BUG_CHOICE_FIELDS => qw(
    bug_status
    component
    product
    resolution
    target_milestone
    version
);

use constant DEFAULT_VALUE_MAP => {
    op_sys       => 'defaultopsys',
    rep_platform => 'defaultplatform',
    priority     => 'defaultpriority',
    bug_severity => 'defaultseverity'
};

sub API_NAMES {
    # Internal field names converted to the API equivalents
    my %api_names = reverse %{ Bugzilla::Bug::FIELD_MAP() };
    return \%api_names;
}

###############
# API Methods #
###############

sub create {
    my ($self, $params) = @_;

    Bugzilla->login(LOGIN_REQUIRED);
    Bugzilla->switch_to_shadow_db();

    my $product = delete $params->{product};
    $product || ThrowCodeError('params_required',
                               { function => 'Ember.create', params => ['product'] });

    my $product_obj = Bugzilla::Product->check($product);

    my $fake_bug = Bugzilla::Extension::Ember::FakeBug->new(
        { product_obj => $product_obj, reporter_id => Bugzilla->user->id });

    my @fields = $self->_get_fields($fake_bug);

    return {
        fields => \@fields
    };
}

sub show {
    my ($self, $params) = @_;
    my (@fields, $attachments, $comments, $data);
    my $dbh = Bugzilla->dbh;
    my $user = Bugzilla->user;

    Bugzilla->switch_to_shadow_db();

    # Throw error if token was provided and user is not logged
    # in meaning token was invalid/expired.
    if (exists $params->{token} && !$user->id) {
        ThrowUserError('invalid_token');
    }

    my $bug_id = delete $params->{id};
    $bug_id || ThrowCodeError('params_required',
                              { function => 'Ember.show', params => ['id'] });

    my $bug = Bugzilla::Bug->check($bug_id);

    my $bug_hash = $self->_bug_to_hash($bug, $params);

    # Only return changes since last_updated if provided
    my $last_updated = delete $params->{last_updated};
    if ($last_updated) {
        trick_taint($last_updated);

        my $updated_fields =
            $dbh->selectcol_arrayref('SELECT fieldid FROM bugs_activity
                                       WHERE bug_when > ? AND bug_id = ?',
                                     undef, ($last_updated, $bug->id));

        if (@$updated_fields) {
            # Also add in the delta_ts value which is in the bugs_activity
            # entries
            push(@$updated_fields, get_field_id('delta_ts'));
            @fields = $self->_get_fields($bug, $updated_fields);
        }
    }
    # Return all the things
    else {
        @fields = $self->_get_fields($bug);
    }

    # Place the fields current value along with the field definition
    foreach my $field (@fields) {
        if (($field->{name} eq 'depends_on'
            || $field->{name} eq 'blocks')
            && scalar @{ $bug_hash->{$field->{name}} })
        {
            my $bug_ids = delete $bug_hash->{$field->{name}};
            $user->visible_bugs($bug_ids);
            my $bug_objs = Bugzilla::Bug->new_from_list($bug_ids);

            my @new_list;
            foreach my $bug (@$bug_objs) {
                my $data;
                if ($user->can_see_bug($bug)) {
                    $data = {
                        id      => $bug->id,
                        status  => $bug->bug_status,
                        summary => $bug->short_desc
                    };
                }
                else {
                    $data = { id => $bug->id };
                }
                push(@new_list, $data);
            }
            $field->{current_value} = \@new_list;
        }
        else {
            $field->{current_value} = delete $bug_hash->{$field->{name}} || '';
        }
    }

    # Any left over bug values will be added to the field list
    # These are extra fields that do not have a corresponding
    # Field.pm object
    if (!$last_updated) {
        foreach my $key (keys %$bug_hash) {
            my $field = {
                name          => $key,
                current_value => $bug_hash->{$key}
            };
            my $name = Bugzilla::Bug::FIELD_MAP()->{$key} || $key;
            $field->{can_edit} = $self->_can_change_field($name, $bug);
            push(@fields, $field);
        }
    }

    # Complete the return data
    my $data = { id => $bug->id, fields => \@fields };

    return $data;
}

sub search {
    my ($self, $params) = @_;

    my $total;
    if (exists $params->{offset} && exists $params->{limit}) {
        my $count_params = dclone($params);
        delete $count_params->{offset};
        delete $count_params->{limit};
        $count_params->{count_only} = 1;
        $total = $self->SUPER::search($count_params);
    }

    my $result = $self->SUPER::search($params);
    $result->{total} = defined $total ? $total : scalar(@{ $result->{bugs} });
    return $result;
}

sub bug {
    my ($self, $params) = @_;
    my $dbh = Bugzilla->dbh;

    my $bug_id = delete $params->{id};
    $bug_id || ThrowCodeError('param_required',
                              { function => 'Ember.bug', param => 'id' });

    my ($comments, $attachments) = ([], []);
    my $bug = $self->get({ ids => [ $bug_id ] });
    $bug = $bug->{bugs}->[0];

    # Only return changes since last_updated if provided
    my $last_updated = delete $params->{last_updated};
    if ($last_updated) {
        trick_taint($last_updated);
        my $updated_fields = $dbh->selectcol_arrayref('SELECT fielddefs.name
                                                         FROM fielddefs INNER JOIN bugs_activity
                                                              ON fielddefs.id = bugs_activity.fieldid
                                                        WHERE bugs_activity.bug_when > ?
                                                              AND bugs_activity.bug_id = ?',
                                                      undef, ($last_updated, $bug->{id}));

        my %field_map = reverse %{ Bugzilla::Bug::FIELD_MAP() };
        $field_map{'flagtypes.name'} = 'flags';

        my $changed_bug = {};
        foreach my $field (@$updated_fields) {
            my $field_name = $field_map{$field} || $field;
            if ($bug->{$field_name}) {
                $changed_bug->{$field_name} = $bug->{$field_name};
            }
        }
        $bug = $changed_bug;

        # Find any comments created since the last_updated date
        $comments = $self->comments({ ids => $bug_id, new_since => $last_updated });

        # Find any new attachments or modified attachments since the
        # last_updated date
        my $updated_attachments =
            $dbh->selectcol_arrayref('SELECT attach_id FROM attachments
                                       WHERE (creation_ts > ? OR modification_time > ?)
                                             AND bug_id = ?',
                                     undef, ($last_updated, $last_updated, $bug->{id}));
        if ($updated_attachments) {
            $attachments = $self->_get_attachments({ attachment_ids => $updated_attachments,
                                                exclude_fields => ['data'] });
        }
    }
    else {
        $comments    = $self->comments({ ids => [ $bug_id ] });
        $attachments = $self->_get_attachments({ ids => [ $bug_id ],
                                                 exclude_fields => ['data'] });

    }

    $comments = $comments->{bugs}->{$bug_id}->{comments};

    return {
        bug         => $bug,
        comments    => $comments,
        attachments => $attachments,
    };
}

sub get_attachments {
    my ($self, $params) = @_;
    my $attachments = $self->_get_attachments($params);
    my $flag_types = [];
    my $bug;
    if ($params->{ids}) {
        $bug = Bugzilla::Bug->check($params->{ids}->[0]);
        $flag_types = $self->_get_flag_types_bug($bug, 'attachment');
    }
    elsif ($params->{attachment_ids} && @$attachments) {
        $bug = Bugzilla::Bug->check($attachments->[0]->{bug_id});
        $flag_types = $self->_get_flag_types_all($bug, 'attachment')->{attachment};
    }
    if (@$flag_types) {
        @$flag_types = map { $self->_flagtype_to_hash($_, $bug) } @$flag_types;
    }
    return {
        attachments => $attachments,
        flag_types  => $flag_types
    };
}

###################
# Private Methods #
###################

sub _get_attachments {
    my ($self, $params) = @_;
    my $user = Bugzilla->user;

    my $attachments = $self->attachments($params);

    if ($params->{ids}) {
        $attachments = [ map { @{ $attachments->{bugs}->{$_} } }
                         keys %{ $attachments->{bugs} } ];
    }
    elsif ($params->{attachment_ids}) {
        $attachments = [ map { $attachments->{attachments}->{$_} }
                         keys %{ $attachments->{attachments} } ];
    }

    foreach my $attachment (@$attachments) {
        $attachment->{can_edit}
            = ($user->login eq $attachment->{creator} || $user->in_group('editbugs')) ? 1 : 0;
    }

    return $attachments;
}

sub _get_fields {
    my ($self, $bug, $field_ids) = @_;
    my $user = Bugzilla->user;

    # Load the field objects we need
    my @field_objs;
    if ($field_ids) {
        # Load just the fields that match the ids provided
        @field_objs = @{ Bugzilla::Field->match({ id => $field_ids }) };

    }
    else {
        # load up standard fields
        @field_objs = @{ Bugzilla->fields({ custom => 0 }) };

        # Load custom fields
        my $cf_params = { product => $bug->product_obj };
        $cf_params->{component} = $bug->component_obj if $bug->can('component_obj');
        $cf_params->{bug_id} = $bug->id if $bug->id;
        push(@field_objs, Bugzilla->active_custom_fields($cf_params));
    }

    my $return_groups = my $return_flags = $field_ids ? 0 : 1;
    my @fields;
    foreach my $field (@field_objs) {
        $return_groups = 1 if $field->name eq 'bug_group';
        $return_flags  = 1 if $field->name eq 'flagtypes.name';

        # Skip any special fields containing . in the name such as
        # for attachments.*, etc.
        next if $field->name =~ /\./;

        # Remove time tracking fields if the user is privileged
        next if (grep($field->name eq $_, TIMETRACKING_FIELDS)
                 && !Bugzilla->user->is_timetracker);

        # These fields should never be set by the user
        next if grep($field->name eq $_, NON_EDIT_FIELDS);

        # We already selected a product so no need to display all choices
        # Might as well skip classification for new bugs as well.
        next if (!$bug->id && ($field->name eq 'product' || $field->name eq 'classification'));

        # Skip assigned_to and qa_contact for new bugs if user not in
        # editbugs group
        next if (!$bug->id
                 && ($field->name eq 'assigned_to' || $field->name eq 'qa_contact')
                 && !$user->in_group('editbugs', $bug->product_obj->id));

        # Do not display obsolete fields or fields that should be displayed for create bug form
        next if (!$bug->id && $field->custom
                 && ($field->obsolete || !$field->enter_bug));

        push(@fields, $self->_field_to_hash($field, $bug));
    }

    # Add group information as separate field
    if ($return_groups) {
        push(@fields, {
            description  => $self->type('string', 'Groups'),
            is_custom    => $self->type('boolean', 0),
            is_mandatory => $self->type('boolean', 0),
            name         => $self->type('string', 'groups'),
            values       => [ map { $self->_group_to_hash($_, $bug) }
                            @{ $bug->product_obj->groups_available } ]
        });
    }

    # Add flag information as separate field
    if ($return_flags) {
        my $flag_hash;
        if ($bug->id) {
            foreach my $flag_type ('bug', 'attachment') {
                $flag_hash->{$flag_type} = $self->_get_flag_types_bug($bug, $flag_type);
            }
        }
        else {
            $flag_hash = $self->_get_flag_types_all($bug);
        }
        my @flag_values;
        foreach my $flag_type ('bug', 'attachment') {
            foreach my $flag (@{ $flag_hash->{$flag_type} }) {
                push(@flag_values, $self->_flagtype_to_hash($flag, $bug));
            }
        }

        push(@fields, {
            description  => $self->type('string', 'Flags'),
            is_custom    => $self->type('boolean', 0),
            is_mandatory => $self->type('boolean', 0),
            name         => $self->type('string', 'flags'),
            values       => \@flag_values
        });
    }

    return @fields;
}

sub _get_flag_types_all {
    my ($self, $bug, $type) = @_;
    my $params = { is_active => 1 };
    $params->{target_type} = $type if $type;
    return $bug->product_obj->flag_types($params);
}

sub _get_flag_types_bug {
    my ($self, $bug, $type) = @_;
    my $params = {
        target_type         => $type,
        product_id          => $bug->product_obj->id,
        component_id        => $bug->component_obj->id,
        bug_id              => $bug->id,
        active_or_has_flags => $bug->id,
    };
    return Bugzilla::Flag->_flag_types($params);
}

sub _group_to_hash {
    my ($self, $group, $bug) = @_;

    my $data = {
        description => $self->type('string', $group->description),
        name        => $self->type('string', $group->name)
    };

    if ($group->name eq $bug->product_obj->default_security_group) {
        $data->{security_default} = $self->type('boolean', 1);
    }

    return $data;
}

sub _field_to_hash {
    my ($self, $field, $bug) = @_;

    my $data = {
        is_custom    => $self->type('boolean', $field->custom),
        description  => $self->type('string', $field->description),
        is_mandatory => $self->type('boolean', $field->is_mandatory),
    };

    if ($field->custom) {
        $data->{type} = $self->type('string', FIELD_TYPE_MAP->{$field->type});
    }

    # Use the API name if one is present instead of the internal field name
    my $field_name = $field->name;
    $field_name = API_NAMES->{$field_name} || $field_name;

    if ($field_name eq 'longdesc') {
        $field_name = $bug->id ? 'comment' : 'description';
    }

    $data->{name} = $self->type('string', $field_name);

    # Set can_edit true or false if we are editing a current bug
    if ($bug->id) {
        # 'delta_ts's can_edit is incorrectly set in fielddefs
        $data->{can_edit} = $field->name eq 'delta_ts'
                            ? $self->type('boolean', 0)
                            : $self->_can_change_field($field, $bug);
    }

    # description for creating a new bug, otherwise comment

    # FIXME 'version' and 'target_milestone' types are incorrectly set in fielddefs
    if ($field->is_select || $field->name eq 'version' || $field->name eq 'target_milestone') {
        $data->{values} = [ $self->_get_field_values($field, $bug) ];
    }

    # Add default values for specific fields if new bug
    if (!$bug->id && DEFAULT_VALUE_MAP->{$field->name}) {
        my $default_value = Bugzilla->params->{DEFAULT_VALUE_MAP->{$field->name}};
        $data->{default_value} = $default_value;
    }

    return $data;
}

sub _value_to_hash {
    my ($self, $value, $bug) = @_;

    my $data = { name=> $self->type('string', $value->name) };

    if ($bug->{bug_id}) {
        $data->{is_active} = $self->type('boolean', $value->is_active);
    }

    if ($value->can('sortkey')) {
        $data->{sort_key} = $self->type('int', $value->sortkey || 0);
    }

    if ($value->isa('Bugzilla::Component')) {
        $data->{default_assignee} = $self->_user_to_hash($value->default_assignee);
        $data->{initial_cc} = [ map { $self->_user_to_hash($_) } @{ $value->initial_cc } ];
        if (Bugzilla->params->{useqacontact} && $value->default_qa_contact) {
            $data->{default_qa_contact} = $self->_user_to_hash($value->default_qa_contact);
        }
    }

    if ($value->can('description')) {
        $data->{description} = $self->type('string', $value->description);
    }

    return $data;
}

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

    my $data = {
        real_name =>  $self->type('string', $user->name)
    };

    if (Bugzilla->user->id) {
        $data->{email} = $self->type('string', $user->email);
    }

    return $data;
}

sub _get_field_values {
    my ($self, $field, $bug) = @_;

    # Certain fields are special and should use $bug->choices
    # to determine editability and not $bug->check_can_change_field
    my @values;
    if (grep($field->name eq $_, BUG_CHOICE_FIELDS)) {
        @values = @{ $bug->choices->{$field->name} };
    }
    else {
        # We need to get the values from the product for
        # component, version, and milestones.
        if ($field->name eq 'component') {
            @values = @{ $bug->product_obj->components };
        }
        elsif ($field->name eq 'target_milestone') {
            @values = @{ $bug->product_obj->milestones };
        }
        elsif ($field->name eq 'version') {
            @values = @{ $bug->product_obj->versions };
        }
        else {
            @values = @{ $field->legal_values };
        }
    }

    my @filtered_values;
    foreach my $value (@values) {
        next if !$bug->id && !$value->is_active;
        next if $bug->id && !$self->_can_change_field($field, $bug, $value->name);
        push(@filtered_values, $value);
    }

    return map { $self->_value_to_hash($_, $bug) } @filtered_values;
}

sub _can_change_field {
    my ($self, $field, $bug, $value) = @_;
    my $user = Bugzilla->user;
    my $field_name = blessed $field ? $field->name : $field;

    # Cannot set resolution on bug creation
    return $self->type('boolean', 0) if ($field_name eq 'resolution' && !$bug->{bug_id});

    # Cannot edit an obsolete or inactive custom field
    return $self->type('boolean', 0) if (blessed $field && $field->custom && $field->obsolete);

    # If not a multi-select or single-select, value is not provided
    # and we just check if the field itself is editable by the user.
    if (!defined $value) {
        return $self->type('boolean', $bug->check_can_change_field($field_name, 0, 1));
    }

    return $self->type('boolean', $bug->check_can_change_field($field_name, '', $value));
}

sub _flag_to_hash {
    my ($self, $flag) = @_;

    my $data = {
        id                => $self->type('int', $flag->id),
        name              => $self->type('string', $flag->name),
        type_id           => $self->type('int', $flag->type_id),
        creation_date     => $self->type('dateTime', $flag->creation_date),
        modification_date => $self->type('dateTime', $flag->modification_date),
        status            => $self->type('string', $flag->status)
    };

    foreach my $field (qw(setter requestee)) {
        my $field_id = $field . "_id";
        $data->{$field} = $self->_user_to_hash($flag->$field) if $flag->$field_id;
    }

    $data->{type} = $flag->attach_id ? 'attachment' : 'bug';
    $data->{attach_id} = $flag->attach_id if $flag->attach_id;

    return $data;
}

sub _flagtype_to_hash {
    my ($self, $flagtype, $bug) = @_;
    my $user = Bugzilla->user;

    my $cansetflag     = $user->can_set_flag($flagtype);
    my $canrequestflag = $user->can_request_flag($flagtype);

    my $data = {
        id               => $self->type('int' , $flagtype->id),
        name             => $self->type('string' , $flagtype->name),
        description      => $self->type('string' , $flagtype->description),
        type             => $self->type('string' , $flagtype->target_type),
        is_requestable   => $self->type('boolean', $flagtype->is_requestable),
        is_requesteeble  => $self->type('boolean', $flagtype->is_requesteeble),
        is_multiplicable => $self->type('boolean', $flagtype->is_multiplicable),
        can_set_flag     => $self->type('boolean', $cansetflag),
        can_request_flag => $self->type('boolean', $canrequestflag)
    };

    my @values;
    foreach my $value ('?','+','-') {
        push(@values, $self->type('string', $value));
    }
    $data->{values} = \@values;

    # if we're creating a bug, we need to return all valid flags for
    # this product, as well as inclusions & exclusions so ember can
    # display relevant flags once the component is selected
    if (!$bug->id) {
        my $inclusions = $self->_flagtype_clusions_to_hash($flagtype->inclusions, $bug->product_obj->id);
        my $exclusions = $self->_flagtype_clusions_to_hash($flagtype->exclusions, $bug->product_obj->id);
        # if we have both inclusions and exclusions, the exclusions are redundant
        $exclusions = [] if @$inclusions && @$exclusions;
        # no need to return anything if there's just "any component"
        $data->{inclusions} = $inclusions if @$inclusions && $inclusions->[0] ne '';
        $data->{exclusions} = $exclusions if @$exclusions && $exclusions->[0] ne '';
    }

    return $data;
}

sub _flagtype_clusions_to_hash {
    my ($self, $clusions, $product_id) = @_;
    my $result = [];
    foreach my $key (keys %$clusions) {
        my ($prod_id, $comp_id) = split(/:/, $clusions->{$key}, 2);
        if ($prod_id == 0 || $prod_id == $product_id) {
            if ($comp_id) {
                my $component = Bugzilla::Component->new({ id => $comp_id, cache => 1 });
                push @$result, $component->name;
            }
            else {
                return [ '' ];
            }
        }
    }
    return $result;
}

sub rest_resources {
    return [
        # create page - single product name
        qr{^/ember/create/(.*)$}, {
            GET => {
                method => 'create',
                params => sub {
                    return { product => $_[0] };
                }
            }
        },
        # create page - one or more products
        qr{^/ember/create$}, {
            GET => {
                method => 'create'
            }
        },
        # show bug page - single bug id
        qr{^/ember/show/(\d+)$}, {
            GET => {
                method => 'show',
                params => sub {
                    return { id => $_[0] };
                }
            }
        },
        # search - wrapper around SUPER::search which also includes the total
        # number of bugs when using pagination
        qr{^/ember/search$}, {
            GET  => {
                method => 'search',
            },
        },
        # get current bug attributes without field information - single bug id
        qr{^/ember/bug/(\d+)$}, {
            GET => {
                method => 'bug',
                params => sub {
                    return { id => $_[0] };
                }
            }
        },
        # attachments - wrapper around SUPER::attachments that also includes
        # can_edit attribute
        qr{^/ember/bug/(\d+)/attachments$}, {
            GET => {
                method => 'get_attachments',
                params => sub {
                    return { ids => $_[0] };
                }
            }
        },
        qr{^/ember/bug/attachments/(\d+)$}, {
            GET => {
                method => 'get_attachments',
                params => sub {
                    return { attachment_ids => $_[0] };
                }
            }
        }
    ];
};

1;

__END__

=head1 NAME

Bugzilla::Extension::Ember::Webservice - The BMO Ember WebServices API

=head1 DESCRIPTION

This module contains API methods that are useful to users of the Bugzilla Ember
based UI.

=head1 METHODS

See L<Bugzilla::WebService> for a description of how parameters are passed,
and what B<STABLE>, B<UNSTABLE>, and B<EXPERIMENTAL> mean.

=head2 create

B<UNSTABLE>

=over

=item B<Description>

This method returns the necessary information for the Bugzilla Ember UI to generate a
bug creation page.

=item B<Params>

You pass a field called C<product> that must be a valid Bugzilla product name.

=over

=item C<product> (string) - The Bugzilla product name.

=back

=item B<Returns>

=over

=back

=item B<Errors>

=over

=back

=item B<History>

=over

=item Added in BMO Bugzilla B<4.2>.

=back

=back

=head2 show

B<UNSTABLE>

=over

=item B<Description>

This method returns the necessary information for the Bugzilla Ember UI to properly
generate a page to edit current bugs.

=item B<Params>

You pass a field called C<id> that is the current bug id.

=over

=item C<id> (int) - A bug id.

=back

=item B<Returns>

=over

=back

=item B<Errors>

=over

=back

=item B<History>

=over

=item Added in BMO Bugzilla B<4.0>.

=back

=back

=head2 search

B<UNSTABLE>

=over

=item B<Description>

A wrapper around Bugzilla's C<search> method which also returns the total of
bugs matching a query, even if the limit and offset parameters are supplied.

=item B<Params>

As per Bugzilla::WebService::Bug::search()

=item B<Returns>

=over

=back

=item B<Errors>

=over

=back

=item B<History>

=over

=back

=back

=head2 bug

B<UNSTABLE>

=over

=item B<Description>

This method returns just the current bug values, comments, and attachments without
all of the field information.

=item B<Params>

You pass a field called C<id> that is a valid bug ids.

=over

=item C<id> (integer) - A valid bug id

=item C<last_updated> - (dateTime) An optional timestamp that includes only fields,
attachments, or comments that have been changed or added since.

=back

=item B<Returns>

=over

=back

=item B<Errors>

=over

=back

=item B<History>

=over

=item Added in BMO Bugzilla B<4.2>.

=back

=back

=head2 get_attachments

B<UNSTABLE>

=over

=item B<Description>

This method returns the current attachment data and flag types for a given
bug id or attachment id.

=item B<Params>

You pass a field called C<id> that is a valid bug id or an C<attachment_id> which
is a valid attachment id.

=over

=item C<id> (integer) - A valid bug id.

=item C<attachment_id> (integer) - A valid attachment id.

=back

=item B<Returns>

=over

=back

=item B<Errors>

=over

=back

=item B<History>

=over

=item Added in BMO Bugzilla B<4.2>.

=back

=back