Add support for deleting all measurements (#158)

Co-authored-by: Simone Basso <bassosimone@gmail.com>

internal/cli/rm/rm.go

@@ -10,11 +10,50 @@ import (
 	"github.com/ooni/probe-cli/internal/database"
 	survey "gopkg.in/AlecAivazis/survey.v1"
 	db "upper.io/db.v3"
+	"upper.io/db.v3/lib/sqlbuilder"
 )
 
+func deleteAll(sess sqlbuilder.Database, skipInteractive bool) error {
+	if skipInteractive == false {
+		answer := ""
+		confirm := &survey.Select{
+			Message: fmt.Sprintf("Are you sure you wish to delete ALL results"),
+			Options: []string{"true", "false"},
+			Default: "false",
+		}
+		survey.AskOne(confirm, &answer, nil)
+		if answer == "false" {
+			return errors.New("canceled by user")
+		}
+	}
+	doneResults, incompleteResults, err := database.ListResults(sess)
+	if err != nil {
+		log.WithError(err).Error("failed to list results")
+		return err
+	}
+	cnt := 0
+	for _, result := range incompleteResults {
+		err = database.DeleteResult(sess, result.Result.ID)
+		if err == db.ErrNoMoreRows {
+			log.WithError(err).Errorf("failed to delete result #%d", result.Result.ID)
+		}
+		cnt++
+	}
+	for _, result := range doneResults {
+		err = database.DeleteResult(sess, result.Result.ID)
+		if err == db.ErrNoMoreRows {
+			log.WithError(err).Errorf("failed to delete result #%d", result.Result.ID)
+		}
+		cnt++
+	}
+	log.Infof("Deleted #%d measurements", cnt)
+	return nil
+}
+
 func init() {
 	cmd := root.Command("rm", "Delete a result")
 	yes := cmd.Flag("yes", "Skip interactive prompt").Bool()
+	all := cmd.Flag("all", "Delete all measurements").Bool()
 
 	resultID := cmd.Arg("id", "the id of the result to delete").Int64()
 
@@ -25,6 +64,10 @@ func init() {
 			return err
 		}
 
+		if *all == true {
+			return deleteAll(ctx.DB, *yes)
+		}
+
 		if *yes == true {
 			err = database.DeleteResult(ctx.DB, *resultID)
 			if err == db.ErrNoMoreRows {