Add Device addresses with DNS entries report

Netdisco/lib/App/Netdisco/DB/ResultSet/Device.pm

@@ -665,4 +665,62 @@ sub with_poestats_as_hashref {
   return \@return;
 }
 
+=head2 address_nodns_as_hashref
+
+This is a modifier for C<search()> which returns a list of hash references
+for devices addresses without a corresponding DNS entry.
+
+Note:  The DNS resolver checks both reverse and forward entries of the
+address.  Verify reverse and forward DNS entries if it appears an address
+was included erroneously.
+
+Returned hash keys:
+
+=over 4
+
+=item ip
+
+The primary IP address of the device.
+
+=item dns
+
+DNS entry of primary IP address of the device.
+
+=item name
+
+C<sysName> of the device.
+
+=item location
+
+C<sysLocation> of the device.
+
+=item contact
+
+C<sysContact> of the device.
+
+=item alias
+
+IP address belonging to the device without a corresponding DNS
+entry.
+
+=back
+
+=cut
+
+sub address_nodns_as_hashref {
+  my ( $rs, $cond, $attrs ) = @_;
+
+  my @return = $rs->search(
+    { 'device_ips.dns' => undef },
+    { result_class => 'DBIx::Class::ResultClass::HashRefInflator',
+      select       => [ 'ip', 'dns', 'name', 'location', 'contact' ],
+      join         => [qw/device_ips/],
+      '+columns' => [ { 'alias' => 'device_ips.alias' }, ],
+      order_by => { -asc => [qw/me.ip device_ips.alias/] },
+    }
+  )->all;
+
+  return \@return;
+}
+
 1;

Netdisco/lib/App/Netdisco/Web/Plugin/Report/DeviceAddrNoDNS.pm

@@ -0,0 +1,35 @@
+package App::Netdisco::Web::Plugin::Report::DeviceAddrNoDNS;
+
+use Dancer ':syntax';
+use Dancer::Plugin::DBIC;
+use Dancer::Plugin::Auth::Extensible;
+
+use App::Netdisco::Web::Plugin;
+
+register_report(
+    {   category     => 'Device',
+        tag          => 'deviceaddrnodns',
+        label        => 'Addresses without DNS Entries',
+        provides_csv => 1,
+    }
+);
+
+get '/ajax/content/report/deviceaddrnodns' => require_login sub {
+    my $results = schema('netdisco')->resultset('Device')
+        ->address_nodns_as_hashref;
+
+    return unless scalar $results;
+
+    if ( request->is_ajax ) {
+        template 'ajax/report/deviceaddrnodns.tt', { results => $results, },
+            { layout => undef };
+    }
+    else {
+        header( 'Content-Type' => 'text/comma-separated-values' );
+        template 'ajax/report/deviceaddrnodns_csv.tt',
+            { results => $results, },
+            { layout  => undef };
+    }
+};
+
+1;