Bug 640045: Convert Search.pm to use the new AND/OR system internally.

This includes creating new Search::Clause and Search::Condition objects.
r=mkanat, a=mkanat (module owner)

1 files changed, 113 insertions, 0 deletions

diff --git a/Bugzilla/Search/Clause.pm b/Bugzilla/Search/Clause.pm
new file mode 100644
index 000000000..e31bfdd40
--- /dev/null
+++ b/Bugzilla/Search/Clause.pm
@@ -0,0 +1,113 @@
+# -*- 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::Search::Condition qw(condition);
+
+sub new {
+    my ($class, $joiner) = @_;
+    bless { joiner => $joiner || 'AND' }, $class;
+}
+
+sub children {
+    my ($self) = @_;
+    $self->{children} ||= [];
+    return $self->{children};
+}
+
+sub joiner { return $_[0]->{joiner} }
+
+sub has_children {
+    my ($self) = @_;
+    return scalar(@{ $self->children }) > 0 ? 1 : 0;
+}
+
+sub has_conditions {
+    my ($self) = @_;
+    my $children = $self->children;
+    return 1 if grep { $_->isa('Bugzilla::Search::Condition') } @$children;
+    foreach my $child (@$children) {
+        return 1 if $child->has_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;
+    }
+    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) = @_;
+    my @strings;
+    foreach my $child (@{ $self->children }) {
+        next if $child->isa(__PACKAGE__) && !$child->has_conditions;
+        next if $child->isa('Bugzilla::Search::Condition')
+                && !$child->translated;
+
+        my $string = $child->as_string;
+        if ($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;
+    return $sql;
+}
+
+
+1;
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