init

internal/language-service.go

@@ -0,0 +1,146 @@
+package internal
+
+import (
+	"bytes"
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+type LanguageService struct{}
+
+func isValidLang(lang string) bool {
+	valid := []string{"en", "jp", "cn", "kr"}
+	for _, v := range valid {
+		if lang == v {
+			return true
+		}
+	}
+	return false
+}
+
+func (l *LanguageService) GetLanguage(path string) (string, string, error) {
+	files, err := os.ReadDir(path)
+	if err != nil {
+		return "", "", err
+	}
+
+	for _, file := range files {
+		filePath := filepath.Join(path, file.Name())
+
+		content, err := os.ReadFile(filePath)
+		if err != nil {
+			continue
+		}
+
+		patternToFind := []byte("SpriteOutput/UI/Fonts/RPG_CN.ttf")
+		idx := bytes.Index(content, patternToFind)
+		if idx == -1 {
+			continue
+		}
+
+		pattern := []byte("Korean")
+		idx = bytes.Index(content, pattern)
+		if idx == -1 {
+			continue
+		}
+
+		// Move to os text language
+		idx += 10
+		idx += 4
+		osText := string(content[idx : idx+2])
+		idx += 3 * 4 
+
+		// Move to cn voice language
+		idx += 1
+		idx += 5
+		cnVoice := string(content[idx : idx+2])
+		idx += 3 * 2 // skip 2 entries
+
+		// Move to os voice language
+		idx += 1
+		idx += 5
+		osVoice := string(content[idx : idx+2])
+		idx += 3 * 5 // skip 5 entries
+
+		// Move to cn text language
+		idx += 1
+		idx += 4
+		cnText := string(content[idx : idx+2])
+
+		textLang := osText
+		voiceLang := osVoice
+		if !isValidLang(textLang) {
+			textLang = cnText
+		}
+		if !isValidLang(voiceLang) {
+			voiceLang = cnVoice
+		}
+
+		return textLang, voiceLang, nil
+	}
+
+	return "", "", fmt.Errorf("couldn't find file to read language from")
+}
+
+func replaceBytes(content []byte, idx int, choice string, param int) int {
+	for i := 0; i < param; i++ {
+		copy(content[idx:idx+2], []byte(choice))
+		idx += 3
+	}
+	return idx
+}
+
+func (l *LanguageService) SetLanguage(path string, text, voice string) (bool, error) {
+	files, err := os.ReadDir(path)
+	if err != nil {
+		return false, err
+	}
+
+	for _, file := range files {
+		filePath := filepath.Join(path, file.Name())
+
+		content, err := os.ReadFile(filePath)
+		if err != nil {
+			continue
+		}
+
+		patternToFind := []byte("SpriteOutput/UI/Fonts/RPG_CN.ttf")
+		idx := bytes.Index(content, patternToFind)
+		if idx == -1 {
+			continue
+		}
+
+		pattern := []byte("Korean")
+		idx = bytes.Index(content, pattern)
+		if idx == -1 {
+			continue
+		}
+
+		idx += 10
+		idx += 4
+		idx = replaceBytes(content, idx, text, 4)
+		idx += 1
+
+		idx += 5
+		idx = replaceBytes(content, idx, voice, 2)
+		idx += 1
+
+		idx += 5
+		idx = replaceBytes(content, idx, voice, 5)
+
+		idx += 1
+
+		idx += 4
+		_ = replaceBytes(content, idx, text, 2)
+
+		err = os.WriteFile(filePath, content, 0644)
+		if err != nil {
+			return false, err
+		}
+
+		return true, nil
+	}
+
+	return false, fmt.Errorf("couldn't find file to patch. Make sure this file is placed in the correct folder")
+}