Add 'interesting routes' to quays

This way only the routes we're actually interested in will be
displayed.

bus.go

@@ -103,9 +103,12 @@ func getDepartures(quay Quay) ([]Departure, error) {
 			if err != nil {
 				return departures, err
 			}
+
+			if quay.IsInterestingDeparture(d) {
 				departures = append(departures, d)
 			}
 		}
+	}
 
 	return departures, nil
 }

main.go

@@ -4,10 +4,26 @@ import (
 	"net/http"
 )
 
+type Route struct {
+	RouteShortName string `json:"route_short_name"`
+	RouteLongName  string `json:"route_long_name"`
+}
+
 type Quay struct {
 	ID               string `json:"quayid"`
 	Name             string `json:"name"`
 	Town             string `json:"town"`
+	RoutesOfInterest []Route
+}
+
+func (q Quay) IsInterestingDeparture(d Departure) bool {
+	for _, route := range q.RoutesOfInterest {
+		if (route.RouteShortName == d.RouteShortName) && (route.RouteLongName == d.StopHeadsign) {
+			return true
+		}
+	}
+
+	return false
 }
 
 var BusClient *http.Client