Bug 349555: Move dependency validation from post_bug into Bugzilla::Bug

Bugzilla/Bug.pm

@@ -341,6 +341,35 @@ sub _check_component {
     return $obj;
 }
 
+# Takes two comma/space-separated strings and returns arrayrefs
+# of valid bug IDs.
+sub _check_dependencies {
+    my ($depends_on, $blocks) = @_;
+
+    # Only editbugs users can set dependencies on bug entry.
+    return ([], []) unless Bugzilla->user->in_group('editbugs');
+
+    $depends_on ||= '';
+    $blocks     ||= '';
+
+    # Make sure all the bug_ids are valid.
+    my @results;
+    foreach my $string ($depends_on, $blocks) {
+        my @array = split(/[\s,]+/, $string);
+        # Eliminate nulls
+        @array = grep($_, @array);
+        # $field is not passed to ValidateBugID to prevent adding new
+        # dependencies on inaccessible bugs.
+        ValidateBugID($_) foreach (@array);
+        push(@results, \@array);
+    }
+
+    #                               dependson    blocks
+    my %deps = ValidateDependencies($results[0], $results[1]);
+
+    return ($deps{'dependson'}, $deps{'blocked'});
+}
+
 sub _check_keywords {
     my ($keyword_string) = @_;
     $keyword_string = trim($keyword_string);
@@ -1633,6 +1662,7 @@ sub ValidateBugAlias {
 # Validate and return a hash of dependencies
 sub ValidateDependencies {
     my $fields = {};
+    # These can be arrayrefs or they can be strings.
     $fields->{'dependson'} = shift;
     $fields->{'blocked'} = shift;
     my $id = shift || 0;
@@ -1653,7 +1683,9 @@ sub ValidateDependencies {
         next unless $fields->{$target};
 
         my %seen;
-        foreach my $i (split('[\s,]+', $fields->{$target})) {
+        my $target_array = ref($fields->{$target}) ? $fields->{$target}
+                           : [split(/[\s,]+/, $fields->{$target})];
+        foreach my $i (@$target_array) {
             if ($id == $i) {
                 ThrowUserError("dependency_loop_single");
             }

post_bug.cgi

@@ -227,26 +227,8 @@ my @keyword_ids = @{Bugzilla::Bug::_check_keywords($cgi->param('keywords'))};
 Bugzilla::Bug::_check_strict_isolation($product, $cc_ids, 
     $cgi->param('assigned_to'), $cgi->param('qa_contact'));
 
-# Check for valid dependency info. 
-foreach my $field ("dependson", "blocked") {
-    if (UserInGroup("editbugs") && $cgi->param($field)) {
-        my @validvalues;
-        foreach my $id (split(/[\s,]+/, $cgi->param($field))) {
-            next unless $id;
-            # $field is not passed to ValidateBugID to prevent adding new 
-            # dependencies on inaccessible bugs.
-            ValidateBugID($id);
-            push(@validvalues, $id);
-        }
-        $cgi->param(-name => $field, -value => join(",", @validvalues));
-    }
-}
-# Gather the dependency list, and make sure there are no circular refs
-my %deps;
-if (UserInGroup("editbugs")) {
-    %deps = Bugzilla::Bug::ValidateDependencies(scalar($cgi->param('dependson')),
-                                                scalar($cgi->param('blocked')));
-}
+my ($depends_on_ids, $blocks_ids) = Bugzilla::Bug::_check_dependencies(
+    scalar $cgi->param('dependson'), scalar $cgi->param('blocked'));
 
 # get current time
 my $timestamp = $dbh->selectrow_array(q{SELECT NOW()});
@@ -415,6 +397,7 @@ if (UserInGroup("editbugs")) {
                     WHERE bug_id = ?}, undef, ($timestamp, $kw_list, $id));
     }
     if ($cgi->param('dependson') || $cgi->param('blocked')) {
+        my %deps = (dependson => $depends_on_ids, blocked => $blocks_ids);
         foreach my $pair (["blocked", "dependson"], ["dependson", "blocked"]) {
             my ($me, $target) = @{$pair};
             my $sth_dep = $dbh->prepare(qq{