Adding a confirmation prompt for dashboards upload (#174)

* Adding a confirmation prompt for dashboards upload

* Address code review comments

* Address code review comments

cmd/dashboard.go

@@ -4,12 +4,17 @@ import (
 	"fmt"
 	"github.com/esnet/gdg/internal/apphelpers"
 	"github.com/esnet/gdg/internal/service"
+	"github.com/esnet/gdg/internal/tools"
 	"github.com/jedib0t/go-pretty/v6/table"
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 	"strings"
 )
 
+var (
+	skipConfirmAction bool
+)
+
 func parseDashboardGlobalFlags(cmd *cobra.Command) []string {
 	folderFilter, _ := cmd.Flags().GetString("folder")
 	dashboardFilter, _ := cmd.Flags().GetString("dashboard")
@@ -56,6 +61,13 @@ var uploadDashboard = &cobra.Command{
 	Run: func(cmd *cobra.Command, args []string) {
 
 		filter := service.NewDashboardFilter(parseDashboardGlobalFlags(cmd)...)
+
+		if !skipConfirmAction {
+			tools.GetUserConfirmation(fmt.Sprintf("WARNING: this will delete all dashboards from the monitored folders: '%s' "+
+				"(or all folders if ignore_dashboard_filters is set to true) and upload your local copy.  Do you wish to "+
+				"continue (y/n) ", strings.Join(apphelpers.GetCtxDefaultGrafanaConfig().GetMonitoredFolders(), ", "),
+			), "", true)
+		}
 		grafanaSvc.ExportDashboards(filter)
 
 		tableObj.AppendHeader(table.Row{"Title", "id", "folder", "UID"})
@@ -120,6 +132,7 @@ var listDashboards = &cobra.Command{
 
 func init() {
 	rootCmd.AddCommand(dashboard)
+	dashboard.PersistentFlags().BoolVarP(&skipConfirmAction, "skip-confirmation", "", false, "when set to true, bypass confirmation prompts")
 	dashboard.PersistentFlags().StringP("dashboard", "d", "", "filter by dashboard slug")
 	dashboard.PersistentFlags().StringP("folder", "f", "", "Filter by Folder Name (Quotes in names not supported)")
 	dashboard.PersistentFlags().StringSliceP("tags", "t", []string{}, "Filter by Tags (does not apply on upload)")

internal/tools/prompt_helpers.go

@@ -0,0 +1,42 @@
+package tools
+
+import (
+	"bufio"
+	"fmt"
+	log "github.com/sirupsen/logrus"
+	"golang.org/x/exp/slices"
+	"os"
+	"strings"
+)
+
+var validResponse = []rune{'y', 'n'}
+
+// GetUserConfirmation prompts user to confirm operation
+// msg Message to prompt the user with
+// validate returns true/false on success or terminates the process
+// msg: prompt to display to the user asking for a response.
+// error: error message to display if app should terminate
+// terminate:  when set to true will terminate the app user response is not valid.
+func GetUserConfirmation(msg, error string, terminate bool) bool {
+	if error == "" {
+		error = "Goodbye"
+	}
+	for {
+		fmt.Printf(msg)
+		r := bufio.NewReader(os.Stdin)
+		ans, _ := r.ReadString('\n')
+		ans = strings.ToLower(ans)
+		if !slices.Contains(validResponse, rune(ans[0])) {
+			log.Error("Invalid response, please try again.  Only [yes/no] are supported")
+			continue
+		}
+		//Validate Response
+		if ans[0] != 'y' && terminate {
+			log.Fatal(error)
+		} else if ans[0] != 'y' {
+			return false
+		}
+		return true
+	}
+
+}