Support convert advancements and pets' owner

examples/playerdataconvert/advancements.go

@@ -0,0 +1,58 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/google/uuid"
+)
+
+func readAdvancements(dir string, m map[uuid.UUID]UserCache) {
+	entries, err := os.ReadDir(dir)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Failed to open playerdata folder: %v", err)
+		return
+	}
+	for _, files := range entries {
+		filename := files.Name()
+		if ext := filepath.Ext(filename); ext != ".json" {
+			fmt.Fprintf(os.Stderr, "Unkown file type: %s\n", ext)
+			continue
+		}
+
+		// Parse old UUID from filename
+		oldID, err := uuid.Parse(strings.TrimSuffix(filename, ".json"))
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Unable to parse filename as uuid: %v\n", err)
+			continue
+		}
+
+		if ver := oldID.Version(); ver != 3 { // v3 is for offline players
+			fmt.Printf("Ignoring UUID: %v version: %d\n", oldID, ver)
+			continue
+		}
+
+		newUser, ok := m[oldID]
+		if !ok {
+			fmt.Printf("Skip user: %v\n", oldID)
+			continue
+		}
+
+		content, err := os.ReadFile(filepath.Join(dir, filename))
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Failed to read json file: %v\n", err)
+			continue
+		}
+
+		newFile := newUser.UUID.String() + ".json"
+		err = os.WriteFile(filepath.Join(dir, newFile), content, 0o666)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Failed to write json file: %v\n", err)
+			continue
+		}
+
+		fmt.Printf("Converted advancement file: %s\n", newFile)
+	}
+}