fix trains/busses/...

bot.go

@@ -110,8 +110,8 @@ func (b *Bot) BotHandlers() {
 	b.bot.Handle("/value", botGraphValue)
 	b.bot.Handle("/value_delta", botGraphValueDelta)
 	b.bot.Handle("/planes", botGraphPlanes)
-	b.bot.Handle("/busses", botGraphPlanes)
-	b.bot.Handle("/trains", botGraphPlanes)
+	b.bot.Handle("/busses", botGraphBusses)
+	b.bot.Handle("/trains", botGraphTrains)
 
 	b.bot.Handle(tb.OnPhoto, botPhoto)
 	b.bot.Handle(tb.OnChannelPost, botChannelPost)
@@ -984,6 +984,7 @@ func botGraphValue(m *tb.Message) {
 
 func botGraphValueDelta(m *tb.Message) {
 	var (
+		minZero    int
 		maxVal     float64
 		unitFactor float64
 		unitName   string
@@ -1008,6 +1009,9 @@ func botGraphValueDelta(m *tb.Message) {
 				vals[coID] = append(vals[coID], pt)
 			}
 			sort.Slice(vals[coID], func(i, j int) bool { return vals[coID][i].X < vals[coID][j].X })
+			if len(vals[coID]) > minZero {
+				minZero = len(vals[coID])
+			}
 		}
 	}
 
@@ -1017,9 +1021,21 @@ func botGraphValueDelta(m *tb.Message) {
 			if math.Abs(v[i].Y) > maxVal {
 				maxVal = math.Abs(v[i].Y)
 			}
+			if v[i].Y == 0 && i < minZero {
+				minZero = i
+			}
 		}
-		vals[coID] = v[1:]
+		vals[coID] = v
 	}
+	for coID, v := range vals {
+		if minZero > 1 {
+			vals[coID] = v[minZero:]
+		} else {
+			vals[coID] = v[1:]
+		}
+	}
+
+	logInfoDebug("botGraphValueDelta : removing leading %d values", minZero)
 
 	if maxVal > 1000000000 {
 		unitFactor = 1000000000