Starter Tracking (#1)

* starterCounter?

* Update api/savedata/update.go

---------

Co-authored-by: frutescens <info@laptop>
Co-authored-by: Frederico Santos <frederico.f.santos@tecnico.ulisboa.pt>

api/savedata/prometheus.go

@@ -13,4 +13,12 @@ var (
 		},
 		[]string{"gamemode"},
 	)
+
+	starterCounter = promauto.NewCounterVec(
+		prometheus.CounterOpts{
+			Name: "rogueserver_starter_count",
+			Help: "The total number of times a specific starter was selected",
+		},
+		[]string{"starterKey"},
+	)
 )

api/savedata/update.go

@@ -79,4 +79,15 @@ func ProcessSessionMetrics(save defs.SessionSaveData, uuid []byte) {
 	case 4:
 		gameModeCounter.WithLabelValues("challenge").Inc()
 	}
+	if save.WaveIndex == 1 {
+		for i := 0; i < len(save.Party); i++ {
+			formIndex = ""
+			if save.Party[i]["formIndex"] != 0 {
+				formIndex = "-"+save.Party[i]["formIndex"]
+			}
+			key = save.Party[i]["Species"] + formIndex
+			log.Printf("incremented starter %s", key)
+			starterCounter.WithLabelValues(key).Inc()
+		}
+	}
 }