add reports statistics

internal/metrics/collector.go

@@ -85,6 +85,18 @@ var (
 		metricPrefix+"users_pending",
 		"Number of pending users.",
 		nil, nil)
+	reportsNewest = prometheus.NewDesc(
+		metricPrefix+"reports_newest",
+		"Contains the datetime about the newest report of this Instance.",
+		[]string{"datetime"}, nil)
+	reportsOpen = prometheus.NewDesc(
+		metricPrefix+"reports_open",
+		"Number of open reports.",
+		nil, nil)
+	reportsClosed = prometheus.NewDesc(
+		metricPrefix+"reports_closed",
+		"Number of closed reports.",
+		nil, nil)
 )
 
 type friendicaCollector struct {
@@ -133,6 +145,9 @@ func (c *friendicaCollector) Describe(ch chan<- *prometheus.Desc) {
 	ch <- postsOutbound
 	ch <- packetsInbound
 	ch <- packetsOutbound
+	ch <- reportsNewest
+	ch <- reportsOpen
+	ch <- reportsClosed
 }
 
 func (c *friendicaCollector) Collect(ch chan<- prometheus.Metric) {
@@ -254,6 +269,14 @@ func collectSimpleMetrics(ch chan<- prometheus.Metric, status *serverinfo.Server
 			desc:  usersPending,
 			value: float64(status.Users.Pending),
 		},
+		{
+			desc:  reportsOpen,
+			value: float64(status.Reports.Open),
+		},
+		{
+			desc:  reportsClosed,
+			value: float64(status.Reports.Closed),
+		},
 	}
 
 	for _, m := range metrics {
@@ -391,6 +414,13 @@ func collectLastExecutions(ch chan<- prometheus.Metric, status *serverinfo.Serve
 	}
 	ch <- metric
 
+	reportsInfo := status.Reports
+
+	metric, err = prometheus.NewConstMetric(reportsNewest, prometheus.GaugeValue, float64(reportsInfo.Newest.Timestamp), reportsInfo.Newest.DateTime)
+	if err != nil {
+		return fmt.Errorf("error creating metric for %s: %w", reportsNewest, err)
+	}
+	ch <- metric
 	return nil
 }