UPDATE: Add ldiff

internal/diff-service/hdiffz.go

@@ -0,0 +1,167 @@
+package diffService
+
+import (
+	"bufio"
+	"encoding/json"
+	"firefly-launcher/pkg/constant"
+	"firefly-launcher/pkg/hpatchz"
+	"firefly-launcher/pkg/models"
+	"firefly-launcher/pkg/sevenzip"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/wailsapp/wails/v3/pkg/application"
+)
+
+type DiffService struct{}
+
+func (h *DiffService) CheckTypeHDiff(patchPath string) (bool, string, string) {
+	if ok, err := sevenzip.IsFileIn7z(patchPath, "manifest"); err == nil && ok {
+		return true, "manifest", ""
+	}
+
+	if ok, err := sevenzip.IsFileIn7z(patchPath, "hdifffiles.txt"); err == nil && ok {
+		return true, "hdifffiles.txt", ""
+	}
+	if ok, err := sevenzip.IsFileIn7z(patchPath, "hdiffmap.json"); err == nil && ok {
+		return true, "hdiffmap.json", ""
+	}
+	return false, "", "not found hdifffiles.txt or hdiffmap.json"
+}
+
+func (h *DiffService) VersionValidate(gamePath, patchPath string) (bool, string) {
+	oldVersionData, err := models.ParseBinaryVersion(filepath.Join(gamePath, "StarRail_Data\\StreamingAssets\\BinaryVersion.bytes"))
+	if err != nil {
+		return false, err.Error()
+	}
+
+	if _, err := os.Stat(patchPath); err != nil {
+		return false, err.Error()
+	}
+
+	if _, err := os.Stat(constant.TempUrl); os.IsNotExist(err) {
+		if err := os.MkdirAll(constant.TempUrl, os.ModePerm); err != nil {
+			return false, err.Error()
+		}
+	}
+	if err := sevenzip.ExtractAFileFromZip(patchPath, "StarRail_Data\\StreamingAssets\\BinaryVersion.bytes", constant.TempUrl); err != nil {
+		return false, err.Error()
+	}
+
+	binPath := filepath.Join(constant.TempUrl, "BinaryVersion.bytes")
+	newVersionData, err := models.ParseBinaryVersion(binPath)
+	if err != nil {
+		return false, err.Error()
+	}
+	defer os.Remove(binPath)
+
+	v := newVersionData.Subtract(*oldVersionData)
+	if v != 0 && v != 1 {
+		return false, fmt.Sprintf("the diff version %s not valid with game version %s", newVersionData, oldVersionData)
+	}
+
+	return true, "validated"
+}
+
+func (h *DiffService) HDiffPatchData(gamePath string) (bool, string) {
+	hdiffMapPath := filepath.Join(gamePath, "hdiffmap.json")
+	hdiffFilesPath := filepath.Join(gamePath, "hdifffiles.txt")
+
+	var jsonData struct {
+		DiffMap []*models.HDiffData `json:"diff_map"`
+	}
+
+	if _, err := os.Stat(hdiffMapPath); err == nil {
+		data, err := os.ReadFile(hdiffMapPath)
+		if err != nil {
+			return false, err.Error()
+		}
+
+		var jsonDataDiffMap struct {
+			DiffMap []*models.DiffMapType `json:"diff_map"`
+		}
+		if err := json.Unmarshal(data, &jsonDataDiffMap); err != nil {
+			return false, err.Error()
+		}
+		for _, entry := range jsonDataDiffMap.DiffMap {
+			jsonData.DiffMap = append(jsonData.DiffMap, entry.ToHDiffData())
+		}
+	} else if _, err := os.Stat(hdiffFilesPath); err == nil {
+		files, err := models.LoadHDiffFiles(hdiffFilesPath)
+		if err != nil {
+			return false, err.Error()
+		}
+		for _, entry := range files {
+			jsonData.DiffMap = append(jsonData.DiffMap, entry.ToHDiffData())
+		}
+	} else {
+		return false, "no hdiff entries map exist"
+	}
+	application.Get().Event.Emit("diff:stage", map[string]string{"stage": "Patching HDiff"})
+	for i, entry := range jsonData.DiffMap {
+		application.Get().Event.Emit(
+			"diff:progress", map[string]int{
+				"progress":    i,
+				"maxProgress": len(jsonData.DiffMap),
+			})
+
+		sourceFile := filepath.Join(gamePath, entry.SourceFileName)
+		patchFile := filepath.Join(gamePath, entry.PatchFileName)
+		targetFile := filepath.Join(gamePath, entry.TargetFileName)
+
+		if _, err := os.Stat(patchFile); os.IsNotExist(err) {
+			continue
+		}
+
+		if entry.SourceFileName == "" {
+			hpatchz.ApplyPatchEmpty(patchFile, targetFile)
+			os.Remove(patchFile)
+			continue
+		}
+
+		if _, err := os.Stat(sourceFile); os.IsNotExist(err) {
+			continue
+		}
+
+		hpatchz.ApplyPatch(sourceFile, patchFile, targetFile)
+		if entry.SourceFileName != entry.TargetFileName {
+			os.Remove(sourceFile)
+		}
+		os.Remove(patchFile)
+	}
+
+	os.Remove(filepath.Join(gamePath, "hdiffmap.json"))
+	os.Remove(filepath.Join(gamePath, "hdifffiles.txt"))
+	return true, "patching completed"
+}
+
+func (h *DiffService) DeleteFiles(gamePath string) (bool, string) {
+	var deleteFiles []string
+
+	file, err := os.Open(filepath.Join(gamePath, "deletefiles.txt"))
+	if err != nil {
+		return false, ""
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+		if line != "" {
+			deleteFiles = append(deleteFiles, line)
+		}
+	}
+
+	if err := scanner.Err(); err != nil {
+		return false, "no delete files exist"
+	}
+
+	for i, file := range deleteFiles {
+		os.Remove(filepath.Join(gamePath, file))
+		application.Get().Event.Emit("diff:progress", map[string]int{"progress": i, "maxProgress": len(deleteFiles)})
+	}
+	os.Remove(filepath.Join(gamePath, "deletefiles.txt"))
+	return true, ""
+}