X-Git-Url: http://git.giacomolli.uk/onechat/blobdiff_plain/75b9579355e1adcdbb1255a7e8e4582e0a431f3d..786c2b0551517d4befaa35be2c7743f65bd5f1c4:/schedule.go?ds=inline

diff --git a/schedule.go b/schedule.go
index f3dcfe2..3b4a4ee 100644
--- a/schedule.go
+++ b/schedule.go
@@ -6,6 +6,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"log"
 	"os"
 	"slices"
 	"strconv"
@@ -48,11 +49,13 @@ const (
 )
 
 // openSchedules reads the schedules of the file at path. A missing file holds
-// none. The clock gives the time and the time zone of the schedules.
-func openSchedules(path string, clock func() time.Time) (*Schedules, error) {
+// none. The clock gives the time and the time zone of the schedules, and logger
+// gets one line for each run.
+func openSchedules(path string, clock func() time.Time, logger *log.Logger) (*Schedules, error) {
 	s := &Schedules{
 		path:    path,
 		clock:   clock,
+		logger:  logger,
 		check:   scheduleCheck,
 		changed: make(chan struct{}, 1),
 	}
@@ -93,6 +96,7 @@ func openSchedules(path string, clock func() time.Time) (*Schedules, error) {
 type Schedules struct {
 	path    string
 	clock   func() time.Time
+	logger  *log.Logger
 	check   time.Duration
 	changed chan struct{}
 
@@ -244,7 +248,9 @@ func (s *Schedules) Remove(id int) (string, error) {
 // deliver logs the message of each due schedule in l, in due order, as a work
 // message of scheduleSource, and wakes the loop once with all of them. A
 // schedule ends its run with Done after its message is durable in the log. A
-// crash between the two makes the run repeat once.
+// crash between the two makes the run repeat once. Each run logs one line with
+// the ID of the schedule and, for a late run, how late it is. The line holds no
+// text of the schedule.
 func (s *Schedules) deliver(ctx context.Context, l *TurnLoop) error {
 	now := s.clock()
 	var turns []Message
@@ -270,6 +276,12 @@ func (s *Schedules) deliver(ctx context.Context, l *TurnLoop) error {
 			return err
 		}
 
+		if schedule.late(now) {
+			s.logger.Printf("schedule %d ran %s late", schedule.ID, durationText(now.Sub(schedule.Due)))
+		} else {
+			s.logger.Printf("schedule %d ran", schedule.ID)
+		}
+
 		turns = append(turns, message)
 	}
 
@@ -402,13 +414,19 @@ func (s Schedule) Message(now time.Time) string {
 		s.Text,
 	}
 
-	if now.Sub(s.Due) > scheduleLate {
+	if s.late(now) {
 		lines = append(lines, scheduleLateLine)
 	}
 
 	return strings.Join(append(lines, scheduleEmptyReply), "\n")
 }
 
+// late tells if a run at now is late: more than scheduleLate after the due
+// time.
+func (s Schedule) late(now time.Time) bool {
+	return now.Sub(s.Due) > scheduleLate
+}
+
 // repeats returns once for a one-time schedule, or else repeats and the cron
 // expression.
 func (s Schedule) repeats() string {