feat(core): add alter option on deepMerge

tsedio · Dec 6, 2024 · 35a5ff7 · 35a5ff7
1 parent c4dc273
commit 35a5ff7
Show file tree

Hide file tree

Showing 2 changed files with 10 additions and 1 deletion.
diff --git a/packages/core/src/utils/objects/deepMerge.spec.ts b/packages/core/src/utils/objects/deepMerge.spec.ts
@@ -52,18 +52,26 @@ describe("deepMerge", () => {
         });
       });
       it("should merge data (4)", () => {
+        const alter = vi.fn().mockImplementation((key, value) => {
+          return value;
+        });
         expect(
           deepMerge(
             {
               prop: {}
             },
             {
               prop: ""
+            },
+            {
+              alter
             }
           )
         ).toEqual({
           prop: {}
         });
+
+        expect(alter).toHaveBeenCalledWith("prop", {});
       });
       it("should merge data and prevent prototype pollution", () => {
         const obj = JSON.parse('{"__proto__": {"a": "vulnerable"}, "security":  [{"1": "o"}, {"2": "o1"}]}');

diff --git a/packages/core/src/utils/objects/deepMerge.ts b/packages/core/src/utils/objects/deepMerge.ts
@@ -11,6 +11,7 @@ export interface DeepMergeOptions {
   reducers?: Record<string, DeepMergeReducerCB>;
   parentKey?: string;
   cleanUndefinedProps?: boolean;
+  alter?: (key: string, value: any) => any;
 }
 
 export function mergeReducerBuilder(cb: DeepMergeComparatorCB) {
@@ -77,7 +78,7 @@ export function deepMerge<T = any, C = any>(source: T & any, obj: C & any, optio
       return out;
     }
 
-    out[key] = value;
+    out[key] = options.alter?.(key, value) ?? value;
 
     return out;
   }, newObj);