1 files changed, 40 insertions, 0 deletions
diff --git a/server/building.go b/server/building.go
new file mode 100644
index 0000000..c7d298f
--- /dev/null
+++ b/server/building.go
@@ -0,0 +1,40 @@
+package main
+
+import "log"
+
+type Building map[RoomID]Record[Humidity]
+
+func newBuilding(roomIDs []RoomID) Building {
+	b := make(Building)
+	for _, id := range roomIDs {
+		b[id] = newRecord[Humidity]()
+	}
+	return b
+}
+
+func (b Building) Close() {
+	for _, record := range b {
+		record.Close()
+	}
+}
+
+// Calculate the average humidity in the building. Returns false if there is not enough data available.
+func (b Building) average() (Humidity, bool) {
+	var sum Humidity = 0
+	nRooms := 0
+	for room, record := range b {
+		c := make(chan Humidity)
+		record.getRecent <- c
+		if humidity, ok := <-c; ok {
+			sum += humidity
+			nRooms++
+		} else {
+			log.Printf("Warning: no humidity for room '%s'\n", room)
+		}
+	}
+	if nRooms == 0 {
+		log.Println("Warning: not enough data to calculate average humidity")
+		return -1.0, false
+	}
+	return sum / Humidity(nRooms), true
+}