R-1352: the does-not-answer alarm is not mailed after the restart mail of the same episode. Hub commit only.

hub/internal/monitor/controller_supervisor.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"log"
 	"sync"
+	"time"
 
 	"gitea.dooplex.hu/admin/felhom-hub/internal/store"
 )
@@ -140,11 +141,24 @@ func (c *ControllerSupervisorChecker) observe(hostID, customerID string, guests
 			c.emit(customerID, hostID, g, "controller_slow_crashloop")
 		}
 		if g.UnresponsiveSince != "" && g.UnresponsiveSince != prev.unresponsiveSince {
-			c.emit(customerID, hostID, g, "controller_unresponsive")
+			// R-1352: the alarm and the restart of ONE episode lie 2 minutes apart and reports 15, so both can arrive together.
+			// The restart's mail says all of it (since when, restarted when); an alarm after it („restarts it in 2 minutes")
+			// reads backwards. A new episode after that restart has had no restart yet, and alarms.
+			if !(unrespRestart && episodeRestarted(g.UnresponsiveSince, g.UnresponsiveRestartAt)) {
+				c.emit(customerID, hostID, g, "controller_unresponsive")
+			}
 		}
 	}
 }
 
+// episodeRestarted reports whether the unresponsive episode that began at since is the one restarted at restartAt. A time
+// that cannot be read counts as „no": the alarm is mailed, the safe direction.
+func episodeRestarted(since, restartAt string) bool {
+	s, err1 := time.Parse(time.RFC3339, since)
+	r, err2 := time.Parse(time.RFC3339, restartAt)
+	return err1 == nil && err2 == nil && !s.After(r)
+}
+
 func (c *ControllerSupervisorChecker) emit(customerID, hostID string, g ControllerSupervisorGuest, eventType string) {
 	var severity, message string
 	switch eventType {