add modifier key2obj

gjson.go

@@ -2932,6 +2932,7 @@ func init() {
 		"fromstr": modFromStr,
 		"group":   modGroup,
 		"dig":     modDig,
+		"key2obj": modKey2Obj,
 	}
 }
 
@@ -3147,6 +3148,54 @@ func modValues(json, arg string) string {
 	return out.String()
 }
 
+// @values appends key name as value in child object under "_key"
+//
+//	{"Tom Smith": { "height": 170 ,"weight": 80} } -> {"_key": "Tom Smith", "height": 170 ,"weight": 80} }
+func modKey2Obj(json, arg string) string {
+	v := Parse(json)
+	if !v.Exists() {
+		return "[]"
+	}
+	if v.IsArray() {
+		return json
+	}
+	var out strings.Builder
+	out.WriteByte('{')
+
+	var i int
+	v.ForEach(func(rootKey, rootValue Result) bool {
+		if i > 0 {
+			out.WriteByte(',')
+		}
+		out.WriteString(rootKey.Raw)
+		out.WriteString(":")
+
+		if rootValue.IsObject() {
+
+			out.WriteByte('{')
+
+			rootValue.ForEach(func(childKey, childValue Result) bool {
+				out.WriteString(childKey.Raw)
+				out.WriteString(":")
+				out.WriteString(childValue.Raw)
+				out.WriteByte(',')
+				return true
+			})
+			out.WriteString("\"_key\":")
+			out.WriteString(rootKey.Raw)
+
+			out.WriteByte('}')
+
+		} else {
+			out.WriteString(rootValue.Raw)
+		}
+		i++
+		return true
+	})
+	out.WriteByte(']')
+	return out.String()
+}
+
 // @join multiple objects into a single object.
 //
 //	[{"first":"Tom"},{"last":"Smith"}] -> {"first","Tom","last":"Smith"}

gjson_test.go

@@ -2727,3 +2727,29 @@ func TestEscape(t *testing.T) {
 	assert(t, user.Get(Escape("last.name")).String() == "Prichard")
 	assert(t, user.Get("first.name").String() == "")
 }
+
+func TestModKey2Obj(t *testing.T) {
+	json := `
+		{
+			"tickets": {
+				"ISSUE-10": {
+						"subject": "foo",
+						"priority": 1,
+						"id": 123
+				},
+				"ISSUE-12": {
+						"subject": "bar",
+						"priority": 3,
+						"id": 124
+				},
+				"ISSUE-17": {
+						"subject": "baz",
+						"priority": 2,
+						"id": 1128
+				}
+			}
+		}
+	`
+	assert(t, Get(json, "tickets.@key2obj.@values.#._key").String() == `["ISSUE-10","ISSUE-12","ISSUE-17"]`)
+	assert(t, Get(json, "tickets.@[email protected]").String() == `{"subject":"foo","priority":1,"id":123,"_key":"ISSUE-10"}`)
+}