baggage handling system implementation

go/06-airport/airport/baggageHandlingSystem.go

@@ -1,6 +1,7 @@
 package airport
 
 import (
+	"fmt"
 	"time"
 )
 
@@ -11,7 +12,7 @@ type BaggageProcessor interface {
 type BaggageHandlingSystem struct {
 	processingTime time.Duration
 	sinks          map[FlightNumber]BaggageProcessor
-	//TODO: extend
+	lostBaggage    chan LostBaggage
 }
 
 type LostBaggage struct {
@@ -26,19 +27,39 @@ func NewBaggageHandlingSystem(processingTime time.Duration, sinks map[FlightNumb
 	return BaggageHandlingSystem{
 		processingTime: processingTime,
 		sinks:          sinks,
+		lostBaggage:    make(chan LostBaggage),
 	}
 }
 
 func (bhs *BaggageHandlingSystem) ProcessBaggage(fn FlightNumber, b Baggage) error {
-	//TODO: implement
+	sink, ok := bhs.sinks[fn]
+	if !ok {
+		return fmt.Errorf("invalid flight %v", fn)
+	}
+
+	go func() {
+		time.Sleep(bhs.processingTime)
+		if err := sink.ProcessBaggage(fn, b); err != nil {
+			bhs.lostBaggage <- LostBaggage{b, fn, err}
+		}
+	}()
+
 	return nil
+
 }
 
 func (bhs *BaggageHandlingSystem) CollectLostBaggage() []LostBaggage {
-	//TODO: implement
+	lostBaggage := []LostBaggage{}
-	return nil
+	for {
+		select {
+		case lb := <-bhs.lostBaggage:
+			lostBaggage = append(lostBaggage, lb)
+		default:
+			return lostBaggage
+		}
+	}
 }
 
 func (bhs *BaggageHandlingSystem) Start() {
-	//TODO: implement
+
 }