UPDATE: Add ldiff

internal/language-service/language.go

@@ -0,0 +1,175 @@
+package languageService
+
+import (
+	"bytes"
+	assetMeta "firefly-launcher/pkg/language-patch/asset-meta"
+	excelLanguage "firefly-launcher/pkg/language-patch/excel-language"
+	"firefly-launcher/pkg/models"
+	"os"
+	"path/filepath"
+	"slices"
+	"strings"
+)
+
+type LanguageService struct{}
+
+func isValidLang(lang string) bool {
+	valid := []string{"en", "jp", "cn", "kr"}
+	return slices.Contains(valid, lang)
+}
+
+func (l *LanguageService) GetLanguage(path string) (bool, string, string, string) {
+	currentVersionGame, err := models.ParseBinaryVersion(filepath.Join(path, "BinaryVersion.bytes"))
+	if err != nil {
+		return false, "", "", err.Error()
+	}
+
+	typeVersionGame := "os"
+	if strings.Contains(currentVersionGame.Name, "CN") {
+		typeVersionGame = "cn"
+	}
+
+	assetPath := filepath.Join(path, "DesignData\\Windows")
+
+	indexHash, err := assetMeta.GetIndexHash(assetPath)
+	if err != nil {
+		return false, "", "", err.Error()
+	}
+
+	DesignIndex, err := assetMeta.DesignIndexFromBytes(assetPath, indexHash)
+	if err != nil {
+		return false, "", "", err.Error()
+	}
+	dataEntry, fileEntry, err := DesignIndex.FindDataAndFileByTarget(-515329346)
+	if err != nil {
+		return false, "", "", err.Error()
+	}
+	allowedLanguage := excelLanguage.NewExcelLanguage(assetPath, &dataEntry, &fileEntry)
+	languageRows, err := allowedLanguage.Parse()
+	if err != nil {
+		return false, "", "", err.Error()
+	}
+
+	currentTextLang := ""
+	currentVoiceLang := ""
+
+	pairs := []struct {
+		area string
+		typ  *uint8
+	}{
+		{"os", nil},
+		{"cn", func() *uint8 { v := uint8(1); return &v }()},
+		{"os", func() *uint8 { v := uint8(1); return &v }()},
+		{"cn", nil},
+	}
+	
+	for _, p := range pairs {
+		var found *excelLanguage.LanguageRow
+		for i := range languageRows {
+			if languageRows[i].Area != nil && *languageRows[i].Area == p.area {
+				if (languageRows[i].Type == nil && p.typ == nil) ||
+					(languageRows[i].Type != nil && p.typ != nil && *languageRows[i].Type == *p.typ) {
+					found = &languageRows[i]
+					break
+				}
+			}
+		}
+		if found == nil {
+			continue
+		}
+		if found.DefaultLanguage != nil && found.Area != nil && *found.Area == typeVersionGame && found.Type == nil {
+			currentTextLang = *found.DefaultLanguage
+		}
+		if found.DefaultLanguage != nil && found.Area != nil && *found.Area == typeVersionGame && found.Type != nil {
+			currentVoiceLang = *found.DefaultLanguage
+		}
+	}
+
+	if currentTextLang == "" || currentVoiceLang == "" || !isValidLang(currentTextLang) || !isValidLang(currentVoiceLang) {
+		return false, "", "", "not found language"
+	}
+	
+	return true, currentTextLang, currentVoiceLang, ""
+}
+
+
+
+func (l *LanguageService) SetLanguage(path string, text, voice string) (bool, string) {
+	indexHash, err := assetMeta.GetIndexHash(path)
+	if err != nil {
+		return false, err.Error()
+	}
+
+	DesignIndex, err := assetMeta.DesignIndexFromBytes(path, indexHash)
+	if err != nil {
+		return false, err.Error()
+	}
+	dataEntry, fileEntry, err := DesignIndex.FindDataAndFileByTarget(-515329346)
+	if err != nil {
+		return false, err.Error()
+	}
+	allowedLanguage := excelLanguage.NewExcelLanguage(path, &dataEntry, &fileEntry)
+	languageRows, err := allowedLanguage.Parse()
+	if err != nil {
+		return false, err.Error()
+	}
+
+	pairs := []struct {
+		area string
+		typ  *uint8
+		lang string
+	}{
+		{"os", nil, text},
+		{"cn", func() *uint8 { v := uint8(1); return &v }(), voice},
+		{"os", func() *uint8 { v := uint8(1); return &v }(), voice},
+		{"cn", nil, text},
+	}
+	
+	for _, p := range pairs {
+		var found *excelLanguage.LanguageRow
+		for i := range languageRows {
+			if languageRows[i].Area != nil && *languageRows[i].Area == p.area {
+				if (languageRows[i].Type == nil && p.typ == nil) ||
+					(languageRows[i].Type != nil && p.typ != nil && *languageRows[i].Type == *p.typ) {
+					found = &languageRows[i]
+					break
+				}
+			}
+		}
+		if found == nil {
+			continue
+		}
+	
+		found.DefaultLanguage = &p.lang
+		found.LanguageList = []string{p.lang}
+	}
+	
+	data, err := allowedLanguage.Unmarshal(languageRows)
+	if err != nil {
+		return false, err.Error()
+	}
+	
+	filePath := filepath.Join(path, fileEntry.FileByteName+".bytes")
+	
+	f, err := os.OpenFile(filePath, os.O_RDWR, 0644)
+	if err != nil {
+		return false, err.Error()
+	}
+	defer f.Close()
+	
+	if _, err := f.Seek(int64(dataEntry.Offset), 0); err != nil {
+		return false, err.Error()
+	}
+	if _, err := f.Write(data); err != nil {
+		return false, err.Error()
+	}
+	
+	if len(data) < int(dataEntry.Size) {
+		remaining := int(dataEntry.Size) - len(data)
+		zeros := bytes.Repeat([]byte{0}, remaining)
+		if _, err := f.Write(zeros); err != nil {
+			return false, err.Error()
+		}
+	}
+	return true, "success"
+}