cycle through effects

ledstring.yml

@@ -33,22 +33,16 @@ binary_sensor:
     name: "Button"
     on_click:
       then:
-        - switch.toggle:
-            id: ledstring_switch
-
-switch:
-  - platform: template
-    optimistic: True
-    id: ledstring_switch
-    name: "LED String Switch"
-    turn_on_action:
-      - light.turn_on:
-          id: ledstring
-          brightness: 70%
-          effect: rainbow
-    turn_off_action:
-      - light.turn_off:
-          id: ledstring
+        - lambda: |
+            std::string current = id(ledstring).get_effect_name();
+            std::vector<LightEffect *> effects = id(ledstring).get_effects();
+            for(int i=0; i<effects.size(); i++) {
+                if(effects[i]->get_name().compare(current) == 0) {
+                    auto call = id(ledstring).turn_on();
+                    call.set_effect(effects[(i+1) % effects.size()]->get_name());
+                    call.perform();
+                }
+            }
 
 light:
   - platform: neopixelbus