using libtrainsim go library

go.mod

+module train-creator
+
+go 1.16
+
+require git.thm.de/bahn-simulator/libtrainsim-go v0.0.0-20210606125647-5db49d872a16

go.sum

+git.thm.de/bahn-simulator/libtrainsim-go v0.0.0-20210606123308-0e0a20221bc9 h1:gORDSkFCQiSB065Je2KYjOG90Fum7xowSTM2uTu4+Jo=
+git.thm.de/bahn-simulator/libtrainsim-go v0.0.0-20210606123308-0e0a20221bc9/go.mod h1:kWXn2m4huRvtBJvL33VqwS8iAe0RA957TLAN9rZCnpo=
+git.thm.de/bahn-simulator/libtrainsim-go v0.0.0-20210606125647-5db49d872a16 h1:ZdvEJMlOEu3VXo2hoLRYco5kd9FfVZypzYLVBPvPZaE=
+git.thm.de/bahn-simulator/libtrainsim-go v0.0.0-20210606125647-5db49d872a16/go.mod h1:kWXn2m4huRvtBJvL33VqwS8iAe0RA957TLAN9rZCnpo=

main.go

@@ -3,11 +3,12 @@ package main
 import (
 	"encoding/json"
 	"fmt"
+	"git.thm.de/bahn-simulator/libtrainsim-go"
 	"io/ioutil"
 	"log"
 )
 
-var supportedVersions = [...]versionStruct { {0,4,0} }
+var supportedVersions = [...]libtrainsim.VersionStruct { {Major:0, Minor:4, Patch:0} }
 
 func main(){
 
@@ -21,19 +22,24 @@ func main(){
 	create(selectedVersion)
 }
 
-func create(version versionStruct){
-	var trainConfig trainProperties
+func create(version libtrainsim.VersionStruct){
+	var trainConfig libtrainsim.TrainProperties
 
 	switch version {
-	case versionStruct{0,4,0}:
+	case libtrainsim.VersionStruct{Major:0, Minor:4, Patch:0}:
 		tmp := createTrainProperties040()
-		trainConfig = tmp.cast()
+		trainConfig = tmp.Cast()
 	default:
 		trainConfig = createTrainProperties()
 	}
 
+	if !trainConfig.IsValid(){
+		fmt.Println("The train configuration is not valid. Restart the program and try again!")
+		return
+	}
+
 	filename := trainConfig.Name + ".json"
-	jOutput, err := json.MarshalIndent(trainConfig, "", "")
+	jOutput, err := json.MarshalIndent(trainConfig, "", "     ")
 	if err != nil {
 		log.Fatalln(err.Error())
 		return

train_properties.go

 package main
 
-type versionStruct struct {
-	Major int64
-	Minor int64
-	Patch int64
-}
-
-type trainProperties struct{
-	trainProperties040
-}
-
-type trainProperties040 struct {
-	Name    string   `json:"name"`
-	Mass	float64   `json:"mass"`
-	MaxVelocity	float64   `json:"maxVelocity"`
-	MaxAcceleration	float64   `json:"maxAcceleration"`
-	FormatVersion    string   `json:"formatVersion"`
-	TrackDrag	float64   `json:"trackDrag"`
-	AirDrag	float64   `json:"airDrag"`
-	VelocityUnit    string   `json:"velocityUnit"`
-}
-
-func (b *trainProperties040) cast() trainProperties{
-	var retVal trainProperties
-	retVal.Name = b.Name
-	retVal.Mass = b.Mass
-	retVal.MaxVelocity = b.MaxVelocity
-	retVal.MaxAcceleration = b.MaxAcceleration
-	retVal.FormatVersion = b.FormatVersion
-	retVal.TrackDrag = b.TrackDrag
-	retVal.AirDrag = b.AirDrag
-	retVal.VelocityUnit = b.VelocityUnit
-	return retVal
-}
+import (
+	"git.thm.de/bahn-simulator/libtrainsim-go"
+)
 
-func createTrainProperties() trainProperties{
+func createTrainProperties() libtrainsim.TrainProperties{
 	tmp := createTrainProperties040()
-	return tmp.cast()
+	return tmp.Cast()
 }
 
-func createTrainProperties040() trainProperties040{
-	var retVal trainProperties040
+func createTrainProperties040() libtrainsim.TrainProperties040{
+	var retVal libtrainsim.TrainProperties040
 	retVal.FormatVersion = "0.4.0"
 	retVal.Name = readTrainName()
 	retVal.Mass = readPositiveFloat("Please enter the mass of the train:")