fix: Properly handle map and slice pointers (#1817)

#### Summary

I missed this in #1796. Actually added the `normalizePointer` for this reason just forgot to use it for map and slice pointers 

---

Author: erezrokah

transformers/struct.go

@@ -271,11 +271,11 @@ func normalizePointer(field reflect.StructField) reflect.Value {
 }
 
 func (t *structTransformer) fieldToJSONSchema(field reflect.StructField, depth int) any {
-	transformInput := normalizePointer(field)
-	switch transformInput.Elem().Kind() {
+	normalizedField := normalizePointer(field)
+	switch normalizedField.Elem().Kind() {
 	case reflect.Struct:
 		fieldsMap := make(map[string]any)
-		fieldType := transformInput.Elem().Type()
+		fieldType := normalizedField.Elem().Type()
 		for i := 0; i < fieldType.NumField(); i++ {
 			name, err := t.nameTransformer(fieldType.Field(i))
 			if err != nil {
@@ -304,13 +304,13 @@ func (t *structTransformer) fieldToJSONSchema(field reflect.StructField, depth i
 		return fieldsMap
 	case reflect.Map:
 		keySchema, ok := t.fieldToJSONSchema(reflect.StructField{
-			Type: field.Type.Key(),
+			Type: normalizedField.Elem().Type().Key(),
 		}, depth+1).(string)
 		if keySchema == "" || !ok {
 			return ""
 		}
 		valueSchema := t.fieldToJSONSchema(reflect.StructField{
-			Type: field.Type.Elem(),
+			Type: normalizedField.Elem().Type().Elem(),
 		}, depth+1)
 		if valueSchema == "" {
 			return ""
@@ -320,7 +320,7 @@ func (t *structTransformer) fieldToJSONSchema(field reflect.StructField, depth i
 		}
 	case reflect.Slice:
 		valueSchema := t.fieldToJSONSchema(reflect.StructField{
-			Type: field.Type.Elem(),
+			Type: normalizedField.Elem().Type().Elem(),
 		}, depth+1)
 		if valueSchema == "" {
 			return ""

transformers/struct_test.go

@@ -496,6 +496,15 @@ func TestJSONTypeSchema(t *testing.T) {
 				"tags": `{"utf8":"utf8"}`,
 			},
 		},
+		{
+			name: "simple map pointer",
+			testStruct: struct {
+				Tags *map[string]string `json:"tags"`
+			}{},
+			want: map[string]string{
+				"tags": `{"utf8":"utf8"}`,
+			},
+		},
 		{
 			name: "simple array",
 			testStruct: struct {
@@ -507,6 +516,17 @@ func TestJSONTypeSchema(t *testing.T) {
 				"items": `[{"name":"utf8"}]`,
 			},
 		},
+		{
+			name: "simple array pointer",
+			testStruct: struct {
+				Items *[]struct {
+					Name string `json:"name"`
+				} `json:"items"`
+			}{},
+			want: map[string]string{
+				"items": `[{"name":"utf8"}]`,
+			},
+		},
 		{
 			name: "simple struct",
 			testStruct: struct {