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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.
#
# The Initial Developer of the Original Code is James Robson.
# Portions created by James Robson are Copyright (c) 2009 James Robson.
# All rights reserved.
#
# Contributor(s): James Robson <arbingersys@gmail.com> 

use strict;

package Bugzilla::Comment;

use base qw(Bugzilla::Object);

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

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

use constant DB_COLUMNS => qw(
    comment_id
    bug_id
    who
    bug_when
    work_time
    thetext
    isprivate
    already_wrapped
    type
    extra_data
);

use constant UPDATE_COLUMNS => qw(
    type
    extra_data
);

use constant DB_TABLE => 'longdescs';
use constant ID_FIELD => 'comment_id';
use constant LIST_ORDER => 'bug_when';

use constant VALIDATORS => {
    type => \&_check_type,
};

use constant UPDATE_VALIDATORS => {
    extra_data => \&_check_extra_data,
};

#########################
# Database Manipulation #
#########################

sub update {
    my $self = shift;
    my $changes = $self->SUPER::update(@_);
    $self->bug->_sync_fulltext();
    return $changes;
}

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

sub already_wrapped { return $_[0]->{'already_wrapped'}; }
sub body        { return $_[0]->{'thetext'};   }
sub bug_id      { return $_[0]->{'bug_id'};    }
sub creation_ts { return $_[0]->{'bug_when'};  }
sub is_private  { return $_[0]->{'isprivate'}; }
sub work_time   { return $_[0]->{'work_time'}; }
sub type        { return $_[0]->{'type'};      }
sub extra_data  { return $_[0]->{'extra_data'} }

sub bug {
    my $self = shift;
    require Bugzilla::Bug;
    $self->{bug} ||= new Bugzilla::Bug($self->bug_id);
    return $self->{bug};
}

sub is_about_attachment {
    my ($self) = @_;
    return 1 if ($self->type == CMT_ATTACHMENT_CREATED
                 or $self->type == CMT_ATTACHMENT_UPDATED);
    return 0;
}

sub attachment {
    my ($self) = @_;
    return undef if not $self->is_about_attachment;
    $self->{attachment} ||= new Bugzilla::Attachment($self->extra_data);
    return $self->{attachment};
}

sub author { 
    my $self = shift;
    $self->{'author'} ||= new Bugzilla::User($self->{'who'});
    return $self->{'author'};
}

sub body_full {
    my ($self, $params) = @_;
    $params ||= {};
    my $template = Bugzilla->template_inner;
    my $body;
    $template->process("bug/format_comment.txt.tmpl", 
                       { comment => $self, %$params }, \$body)
        || ThrowTemplateError($template->error());
    $body =~ s/^X//;
    if ($params->{wrap} and !$self->already_wrapped) {
        $body = wrap_comment($body);
    }
    return $body;
}

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

sub set_extra_data { $_[0]->set('extra_data', $_[1]); }

sub set_type {
    my ($self, $type, $extra_data) = @_;
    $self->set('type', $type);
    $self->set_extra_data($extra_data);
}

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

sub _check_extra_data {
    my ($invocant, $extra_data, $type) = @_;
    $type = $invocant->type if ref $invocant;
    if ($type == CMT_NORMAL or $type == CMT_POPULAR_VOTES) {
        if (defined $extra_data) {
            ThrowCodeError('comment_extra_data_not_allowed',
                           { type => $type, extra_data => $extra_data });
        }
    }
    else {
        if (!defined $extra_data) {
            ThrowCodeError('comment_extra_data_required', { type => $type });
        }
        if ($type == CMT_MOVED_TO) {
            $extra_data = Bugzilla::User->check($extra_data)->login;
        }
        elsif ($type == CMT_ATTACHMENT_CREATED 
               or $type == CMT_ATTACHMENT_UPDATED) 
        {
             my $attachment = Bugzilla::Attachment->check({ 
                 id => $extra_data });
             $extra_data = $attachment->id;
        }
        else {
            my $original = $extra_data;
            detaint_natural($extra_data) 
              or ThrowCodeError('comment_extra_data_not_numeric',
                                { type => $type, extra_data => $original });
        }
    }

    return $extra_data;
}

sub _check_type {
    my ($invocant, $type) = @_;
    $type ||= CMT_NORMAL;
    my $original = $type;
    detaint_natural($type)
        or ThrowCodeError('comment_type_invalid', { type => $original });
    return $type;
}

sub count {
    my ($self) = @_;

    return $self->{'count'} if defined $self->{'count'};

    my $dbh = Bugzilla->dbh;
    ($self->{'count'}) = $dbh->selectrow_array(
        "SELECT COUNT(*)
           FROM longdescs 
          WHERE bug_id = ? 
                AND bug_when <= ?",
        undef, $self->bug_id, $self->creation_ts);

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

1;

__END__

=head1 NAME

Bugzilla::Comment - A Comment for a given bug 

=head1 SYNOPSIS

 use Bugzilla::Comment;

 my $comment = Bugzilla::Comment->new($comment_id);
 my $comments = Bugzilla::Comment->new_from_list($comment_ids);

=head1 DESCRIPTION

Bugzilla::Comment represents a comment attached to a bug.

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

=head2 Accessors

=over

=item C<bug_id>

C<int> The ID of the bug to which the comment belongs.

=item C<creation_ts>

C<string> The comment creation timestamp.

=item C<body>

C<string> The body without any special additional text.

=item C<work_time>

C<string> Time spent as related to this comment.

=item C<is_private>

C<boolean> Comment is marked as private

=item C<already_wrapped>

If this comment is stored in the database word-wrapped, this will be C<1>.
C<0> otherwise.

=item C<author>

L<Bugzilla::User> who created the comment.

=item C<count>

C<int> The position this comment is located in the full list of comments for a bug starting from 0.

=item C<body_full>

=over

=item B<Description>

C<string> Body of the comment, including any special text (such as
"this bug was marked as a duplicate of...").

=item B<Params>

=over

=item C<is_bugmail>

C<boolean>. C<1> if this comment should be formatted specifically for
bugmail.

=item C<wrap>

C<boolean>. C<1> if the comment should be returned word-wrapped.

=back

=item B<Returns>

A string, the full text of the comment as it would be displayed to an end-user.

=back

=back

=cut