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alexa-tube.go
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alexa-tube.go
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package main
import (
"os"
gotube "github.com/FireEater64/go-tube"
alexa "github.com/bsilverman/go-alexa/skillserver"
)
const (
HELP_RESPONSE = "Try asking me about the tube status for a particular line"
ERROR_RESPONSE = "I'm sorry - I can't help you with that"
)
var Applications = map[string]interface{}{
"/echo/tfl": alexa.EchoApplication{ // Route
AppID: os.Getenv("ALEXA_APP_ID"),
OnIntent: EchoIntentHandler,
OnLaunch: EchoIntentHandler,
},
}
func main() {
port, portEnvar := os.LookupEnv("HTTP_PLATFORM_PORT")
if !portEnvar {
port = "3000" // For testing
}
alexa.Run(Applications, port)
}
func EchoIntentHandler(echoReq *alexa.EchoRequest, echoResp *alexa.EchoResponse) {
switch echoReq.GetIntentName() {
case "AMAZON.HelpIntent":
echoResp.OutputSpeech(HELP_RESPONSE).EndSession(false)
break
case "AMAZON.StopIntent":
echoResp.EndSession(true)
break
case "GetLineStatus":
station, err := echoReq.GetSlotValue("Line")
if err != nil {
echoResp.OutputSpeech(ERROR_RESPONSE).EndSession(true)
} else {
echoResp.OutputSpeech(GetTubeStatusString(station)).EndSession(true)
}
break
default:
echoResp.OutputSpeech(ERROR_RESPONSE).EndSession(true)
break
}
}
func GetTubeStatusString(givenLine string) string {
TFL := gotube.NewTFL(os.Getenv("TFL_API_KEY"), os.Getenv("TFL_API_SECRET"))
status, _ := TFL.GetStatusForLine(givenLine)
return (*status)[0].SeverityDescription
}