Support convert advancements and pets' owner

examples/playerdataconvert/utils.go

@@ -0,0 +1,48 @@
+package main
+
+import (
+	"encoding/binary"
+	"encoding/json"
+	"fmt"
+	"net/http"
+
+	"github.com/google/uuid"
+)
+
+func usernameToUUID(name string) (string, uuid.UUID, error) {
+	var id uuid.UUID
+	resp, err := http.Get("https://api.mojang.com/users/profiles/minecraft/" + name)
+	if err != nil {
+		return "", id, err
+	}
+
+	var body struct {
+		Name string `json:"name"`
+		ID   string `json:"id"`
+	}
+	err = json.NewDecoder(resp.Body).Decode(&body)
+	if err != nil {
+		return "", id, err
+	}
+
+	id, err = uuid.Parse(body.ID)
+	return body.Name, id, err
+}
+
+func intArrayToUUID(uuidInts []int32) (id uuid.UUID, err error) {
+	if uuidLen := len(uuidInts); uuidLen != 4 {
+		err = fmt.Errorf("invalid UUID len: %d * int32", uuidLen)
+		return
+	}
+	for i, v := range uuidInts {
+		binary.BigEndian.PutUint32(id[i*4:], uint32(v))
+	}
+	return
+}
+
+func uuidToIntArray(id uuid.UUID) (ints [4]int32) {
+	for i := range ints {
+		ints[i] = int32(binary.BigEndian.Uint32(id[i*4:]))
+	}
+	return
+}