Implement Triggers and Scarring

Assets/Battle/Trigger.cs

@@ -0,0 +1,36 @@
+public enum TriggerExpiration {
+    Never,
+    StartOfNextHeroTurn,
+}
+
+public enum TriggerRepetition {
+    Once,
+    Multiple,
+}
+
+public class Trigger {
+
+    private TriggeredEffect callback;
+    private TriggerExpiration expiration;
+    private TriggerRepetition repetition;
+    private bool expired;
+
+    public Trigger(TriggeredEffect callback, TriggerExpiration expiration,
+            TriggerRepetition repetition) {
+        this.callback = callback;
+        this.expiration = expiration;
+        this.repetition = repetition;
+    }
+
+    public void Run(IBattleEffectApplier effectApplier) {
+        if (this.expired) return;
+        callback(effectApplier);
+        if (this.repetition == TriggerRepetition.Once) {
+            this.expired = true;
+        }
+    }
+
+    public bool Expired {get => this.expired;}
+    public TriggerExpiration Expiration {get => this.expiration;}
+    public TriggerRepetition Repetition {get => this.repetition;}
+}