Add one-click dashboard updates

update.go

@@ -2,11 +2,14 @@ package main
 
 import (
 	"encoding/json"
+	"fmt"
 	"os"
+	"path/filepath"
 	"time"
 )
 
 const defaultUpdateStatusPath = "/var/lib/proxmox-dashboard/update-status.json"
+const defaultUpdateRequestPath = "/var/lib/proxmox-dashboard/update-request"
 
 type UpdateStatus struct {
 	CurrentVersion   string    `json:"currentVersion"`
@@ -31,3 +34,44 @@ func readUpdateStatus() UpdateStatus {
 	status.CurrentVersion = version
 	return status
 }
+
+func requestUpdate() (UpdateStatus, error) {
+	requestPath := os.Getenv("DASHBOARD_UPDATE_REQUEST_PATH")
+	if requestPath == "" {
+		requestPath = defaultUpdateRequestPath
+	}
+	if err := os.MkdirAll(filepath.Dir(requestPath), 0o750); err != nil {
+		return UpdateStatus{}, err
+	}
+	status := readUpdateStatus()
+	status.State = "queued"
+	status.Message = "Обновление поставлено в очередь."
+	status.CheckedAt = time.Now()
+	statusPath := os.Getenv("DASHBOARD_UPDATE_STATUS_PATH")
+	if statusPath == "" {
+		statusPath = defaultUpdateStatusPath
+	}
+	data, _ := json.Marshal(status)
+	temporary, err := os.CreateTemp(filepath.Dir(statusPath), ".update-status-")
+	if err != nil {
+		return UpdateStatus{}, err
+	}
+	temporaryPath := temporary.Name()
+	defer os.Remove(temporaryPath)
+	if _, err = temporary.Write(data); err == nil {
+		err = temporary.Chmod(0o644)
+	}
+	if closeErr := temporary.Close(); err == nil {
+		err = closeErr
+	}
+	if err == nil {
+		err = os.Rename(temporaryPath, statusPath)
+	}
+	if err != nil {
+		return UpdateStatus{}, fmt.Errorf("не удалось сохранить запрос обновления: %w", err)
+	}
+	if err := os.WriteFile(requestPath, []byte(time.Now().Format(time.RFC3339Nano)), 0o640); err != nil {
+		return UpdateStatus{}, err
+	}
+	return status, nil
+}