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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 BugzillaSource, Inc.
# Portions created by the Initial Developer are Copyright (C) 2011 the
# Initial Developer. All Rights Reserved.
#
# Contributor(s):
# Max Kanat-Alexander <mkanat@bugzilla.org>
package Bugzilla::Search::Clause;
use strict;
use Bugzilla::Error;
use Bugzilla::Search::Condition qw(condition);
use Bugzilla::Util qw(trick_taint);
sub new {
my ($class, $joiner) = @_;
if ($joiner and $joiner ne 'OR' and $joiner ne 'AND') {
ThrowCodeError('search_invalid_joiner', { joiner => $joiner });
}
# This will go into SQL directly so needs to be untainted.
trick_taint($joiner) if $joiner;
bless { joiner => $joiner || 'AND' }, $class;
}
sub children {
my ($self) = @_;
$self->{children} ||= [];
return $self->{children};
}
sub joiner { return $_[0]->{joiner} }
sub has_translated_conditions {
my ($self) = @_;
my $children = $self->children;
return 1 if grep { $_->isa('Bugzilla::Search::Condition')
&& $_->translated } @$children;
foreach my $child (@$children) {
next if $child->isa('Bugzilla::Search::Condition');
return 1 if $child->has_translated_conditions;
}
return 0;
}
sub add {
my $self = shift;
my $children = $self->children;
if (@_ == 3) {
push(@$children, condition(@_));
return;
}
my ($child) = @_;
return if !defined $child;
$child->isa(__PACKAGE__) || $child->isa('Bugzilla::Search::Condition')
|| die 'child not the right type: ' . $child;
push(@{ $self->children }, $child);
}
sub negate {
my ($self, $value) = @_;
if (@_ == 2) {
$self->{negate} = $value ? 1 : 0;
}
return $self->{negate};
}
sub walk_conditions {
my ($self, $callback) = @_;
foreach my $child (@{ $self->children }) {
if ($child->isa('Bugzilla::Search::Condition')) {
$callback->($child);
}
else {
$child->walk_conditions($callback);
}
}
}
sub as_string {
my ($self) = @_;
if (!$self->{sql}) {
my @strings;
foreach my $child (@{ $self->children }) {
next if $child->isa(__PACKAGE__) && !$child->has_translated_conditions;
next if $child->isa('Bugzilla::Search::Condition')
&& !$child->translated;
my $string = $child->as_string;
next unless $string;
if ($self->joiner eq 'AND') {
$string = "( $string )" if $string =~ /OR/;
}
else {
$string = "( $string )" if $string =~ /AND/;
}
push(@strings, $string);
}
my $sql = join(' ' . $self->joiner . ' ', @strings);
$sql = "NOT( $sql )" if $sql && $self->negate;
$self->{sql} = $sql;
}
return $self->{sql};
}
# Search.pm converts URL parameters to Clause objects. This helps do the
# reverse.
sub as_params {
my ($self) = @_;
my @params;
foreach my $child (@{ $self->children }) {
if ($child->isa(__PACKAGE__)) {
my %open_paren = (f => 'OP', n => scalar $child->negate,
j => $child->joiner);
push(@params, \%open_paren);
push(@params, $child->as_params);
my %close_paren = (f => 'CP');
push(@params, \%close_paren);
}
else {
push(@params, $child->as_params);
}
}
return @params;
}
1;
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