add saturatiion to/fromJson

Author: strausr

__TESTS__/unit/fromJson/adjust.fromJson.test.ts

@@ -4,12 +4,14 @@ describe('adjust.fromJson', () => {
   it('should generate a url with adjust actions from array of models', function () {
     const transformation = fromJson([
       { actionType: 'improve', mode: 'outdoor', blend: 30},
-      { actionType: 'unsharpMask', level: 50}
+      { actionType: 'unsharpMask', level: 50},
+      { actionType: 'saturation', level: 40}
     ]);
 
     expect(transformation.toString()).toStrictEqual([
       'e_improve:outdoor:30',
-      'e_unsharp_mask:50'
+      'e_unsharp_mask:50',
+      'e_saturation:40'
     ].join('/'));
   });
 });

__TESTS__/unit/toJson/adjust.toJson.test.ts

@@ -24,4 +24,15 @@ describe('Adjust toJson()', () => {
       }
     ]);
   });
+
+  it('adjust.saturation', () => {
+    const transformation = new Transformation()
+      .addAction(Adjust.saturation().level(50));
+    expect(transformation.toJson()).toStrictEqual( [
+      {
+        actionType: 'saturation',
+        level: 50
+      }
+    ]);
+  });
 });

src/internal/fromJson.ts

@@ -84,7 +84,8 @@ const ActionModelMap: Record<string, IHasFromJson> = {
   pixelate: Pixelate,
   blur: BlurAction,
   improve: ImproveAction,
-  unsharpMask: EffectActionWithStrength
+  unsharpMask: EffectActionWithStrength,
+  saturation: EffectActionWithLevel
 };
 
 /**