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# 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::Search::Clause;
use 5.10.1;
use strict;
use warnings;
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 $self->{children};
}
sub update_search_args {
my ($self, $search_args) = @_;
# abstract
}
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')) {
$callback->($self, $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;
=head1 B<Methods in need of POD>
=over
=item has_translated_conditions
=item as_string
=item add
=item children
=item negate
=item update_search_args
=item walk_conditions
=item joiner
=item as_params
=back
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