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package service
import (
"encoding/json"
"fmt"
"net/http"
"os"
"os/exec"
"path/filepath"
"runtime"
"strconv"
"strings"
"syscall"
"time"
"github.com/mhsanaei/3x-ui/v2/config"
"github.com/mhsanaei/3x-ui/v2/logger"
)
// PanelService provides business logic for panel management operations.
// It handles panel restart, updates, and system-level panel controls.
type PanelService struct{}
// PanelUpdateInfo contains the current and latest available panel versions.
type PanelUpdateInfo struct {
CurrentVersion string `json:"currentVersion"`
LatestVersion string `json:"latestVersion"`
UpdateAvailable bool `json:"updateAvailable"`
}
func (s *PanelService) RestartPanel(delay time.Duration) error {
p, err := os.FindProcess(syscall.Getpid())
if err != nil {
return err
}
go func() {
time.Sleep(delay)
err := p.Signal(syscall.SIGHUP)
if err != nil {
logger.Error("failed to send SIGHUP signal:", err)
}
}()
return nil
}
// GetUpdateInfo checks GitHub for the latest 3x-ui release.
func (s *PanelService) GetUpdateInfo() (*PanelUpdateInfo, error) {
latest, err := fetchLatestPanelVersion()
if err != nil {
return nil, err
}
current := config.GetVersion()
return &PanelUpdateInfo{
CurrentVersion: current,
LatestVersion: latest,
UpdateAvailable: isNewerVersion(latest, current),
}, nil
}
// StartUpdate starts the official updater outside of the current web request.
func (s *PanelService) StartUpdate() error {
if runtime.GOOS != "linux" {
return fmt.Errorf("panel web update is supported only on Linux installations")
}
bash, err := exec.LookPath("bash")
if err != nil {
return fmt.Errorf("bash is required to run the panel updater: %w", err)
}
curl, err := exec.LookPath("curl")
if err != nil {
return fmt.Errorf("curl is required to download the panel updater: %w", err)
}
mainFolder, serviceFolder := resolveUpdateFolders()
updateScript := fmt.Sprintf("set -o pipefail; %s -fLs https://raw.githubusercontent.com/MHSanaei/3x-ui/main/update.sh | %s", shellQuote(curl), shellQuote(bash))
if systemdRun, err := exec.LookPath("systemd-run"); err == nil {
unitName := fmt.Sprintf("x-ui-web-update-%d", time.Now().Unix())
cmd := exec.Command(systemdRun,
"--unit", unitName,
"--setenv", "XUI_MAIN_FOLDER="+mainFolder,
"--setenv", "XUI_SERVICE="+serviceFolder,
bash, "-lc", updateScript,
)
out, err := cmd.CombinedOutput()
if err != nil {
output := strings.TrimSpace(string(out))
if !strings.Contains(output, "System has not been booted with systemd") &&
!strings.Contains(output, "Failed to connect to bus") {
return fmt.Errorf("failed to start panel update job: %w: %s", err, output)
}
logger.Warning("systemd-run is unavailable, falling back to detached update process:", output)
} else {
logger.Infof("started panel update job via systemd-run unit %s", unitName)
return nil
}
}
cmd := exec.Command(bash, "-lc", updateScript)
cmd.Env = append(os.Environ(),
"XUI_MAIN_FOLDER="+mainFolder,
"XUI_SERVICE="+serviceFolder,
)
setDetachedProcess(cmd)
if err := cmd.Start(); err != nil {
return fmt.Errorf("failed to start panel update job: %w", err)
}
if err := cmd.Process.Release(); err != nil {
logger.Warning("failed to release panel update process:", err)
}
logger.Infof("started panel update job with pid %d", cmd.Process.Pid)
return nil
}
func fetchLatestPanelVersion() (string, error) {
client := &http.Client{Timeout: 10 * time.Second}
resp, err := client.Get("https://api.github.com/repos/MHSanaei/3x-ui/releases/latest")
if err != nil {
return "", err
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return "", fmt.Errorf("GitHub API returned status %d: %s", resp.StatusCode, resp.Status)
}
var release Release
if err := json.NewDecoder(resp.Body).Decode(&release); err != nil {
return "", err
}
if release.TagName == "" {
return "", fmt.Errorf("latest panel release tag is empty")
}
return release.TagName, nil
}
func resolveUpdateFolders() (string, string) {
mainFolder := os.Getenv("XUI_MAIN_FOLDER")
if mainFolder == "" {
if exePath, err := os.Executable(); err == nil {
mainFolder = filepath.Dir(exePath)
}
}
if mainFolder == "" {
mainFolder = "/usr/local/x-ui"
}
serviceFolder := os.Getenv("XUI_SERVICE")
if serviceFolder == "" {
serviceFolder = "/etc/systemd/system"
}
return mainFolder, serviceFolder
}
func isNewerVersion(latest string, current string) bool {
cmp, ok := compareVersionStrings(latest, current)
if !ok {
return normalizeVersionTag(latest) != normalizeVersionTag(current)
}
return cmp > 0
}
func compareVersionStrings(a string, b string) (int, bool) {
aParts, okA := parseVersionParts(a)
bParts, okB := parseVersionParts(b)
if !okA || !okB {
return 0, false
}
for i := 0; i < len(aParts); i++ {
if aParts[i] > bParts[i] {
return 1, true
}
if aParts[i] < bParts[i] {
return -1, true
}
}
return 0, true
}
func parseVersionParts(version string) ([3]int, bool) {
var result [3]int
parts := strings.Split(normalizeVersionTag(version), ".")
if len(parts) != 3 {
return result, false
}
for i, part := range parts {
n, err := strconv.Atoi(part)
if err != nil {
return result, false
}
result[i] = n
}
return result, true
}
func normalizeVersionTag(version string) string {
return strings.TrimPrefix(strings.TrimSpace(version), "v")
}
func shellQuote(value string) string {
return "'" + strings.ReplaceAll(value, "'", "'\\''") + "'"
}
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