add filtering to tags. E.g. Hue,Namrom+Gisle will return all with either of the former AND the latter. - will do the opposite.

models/device.go

@@ -99,6 +99,18 @@ func (d *Device) Validate() error {
 	return nil
 }
 
+func (d *Device) HasTag(tags ...string) bool {
+	for _, c := range d.Tags {
+		for _, c2 := range tags {
+			if c == c2 {
+				return true
+			}
+		}
+	}
+
+	return false
+}
+
 func (d *Device) HasCapability(capabilities ...DeviceCapability) bool {
 	for _, c := range d.Capabilities {
 		for _, c2 := range capabilities {