add loop toJson

Author: strausr

__TESTS__/unit/toJson/effect.toJson.test.ts

@@ -148,4 +148,15 @@ describe('Effect toJson()', () => {
       }
     ]);
   });
+
+  it('effect.loop', () => {
+    const transformation = new Transformation()
+      .addAction(Effect.loop().additionalIterations(5));
+    expect(transformation.toJson()).toStrictEqual( [
+      {
+        actionType: 'loop',
+        iterations: 5,
+      }
+    ]);
+  });
 });

src/actions/effect/leveled/Loop.ts

@@ -8,7 +8,10 @@ import {LeveledEffectAction} from "../EffectActions/LeveledEffectAction.js";
  */
 class LoopEffectAction extends LeveledEffectAction {
   additionalIterations(value: number | string): this {
-    return this.setLevel(value);
+    this._actionModel.iterations = value;
+    const qualifierEffect = this.createEffectQualifier(this.effectType, value);
+    this.addQualifier(qualifierEffect);
+    return this;
   }
 }