af83/edwig

package core

import (
    "fmt"
    "time"

    "bitbucket.org/enroute-mobi/ara/audit"
    "bitbucket.org/enroute-mobi/ara/clock"
    "bitbucket.org/enroute-mobi/ara/logger"
    "bitbucket.org/enroute-mobi/ara/siri/siri"
    "bitbucket.org/enroute-mobi/ara/state"
)

type SIRIVehicleMonitoringSubscriber interface {
    state.Stopable
    state.Startable
}

type VMSubscriber struct {
    clock.ClockConsumer

    connector *SIRIVehicleMonitoringSubscriptionCollector
}

type VehicleMonitoringSubscriber struct {
    VMSubscriber

    stop chan struct{}
}

type FakeVehicleMonitoringSubscriber struct {
    VMSubscriber
}

func NewFakeVehicleMonitoringSubscriber(connector *SIRIVehicleMonitoringSubscriptionCollector) SIRIVehicleMonitoringSubscriber {
    subscriber := &FakeVehicleMonitoringSubscriber{}
    subscriber.connector = connector
    return subscriber
}

func (subscriber *FakeVehicleMonitoringSubscriber) Start() {
    subscriber.prepareSIRIVehicleMonitoringSubscriptionRequest()
}

func (subscriber *FakeVehicleMonitoringSubscriber) Stop() {}

func NewSIRIVehicleMonitoringSubscriber(connector *SIRIVehicleMonitoringSubscriptionCollector) SIRIVehicleMonitoringSubscriber {
    subscriber := &VehicleMonitoringSubscriber{}
    subscriber.connector = connector
    return subscriber
}

func (subscriber *VehicleMonitoringSubscriber) Start() {
    logger.Log.Debugf("Start VehicleMonitoringSubscriber")

    subscriber.stop = make(chan struct{})
    go subscriber.run()
}

func (subscriber *VehicleMonitoringSubscriber) run() {
    c := subscriber.Clock().After(5 * time.Second)

    for {
        select {
        case <-subscriber.stop:
            return
        case <-c:
            logger.Log.Debugf("SIRIVehicleMonitoringSubscriber visit")

            subscriber.prepareSIRIVehicleMonitoringSubscriptionRequest()

            c = subscriber.Clock().After(5 * time.Second)
        }
    }
}

func (subscriber *VehicleMonitoringSubscriber) Stop() {
    if subscriber.stop != nil {
        close(subscriber.stop)
    }
}

func (subscriber *VMSubscriber) prepareSIRIVehicleMonitoringSubscriptionRequest() {
    collectSubscriber := NewCollectSubcriber(subscriber.connector, VehicleMonitoringCollect)
    subscriptionRequests := collectSubscriber.GetSubscriptionRequest()

    if len(subscriptionRequests) == 0 {
        return
    }

    message := subscriber.newBQEvent()
    defer audit.CurrentBigQuery(string(subscriber.connector.Partner().Referential().Slug())).WriteEvent(message)

    siriVehicleMonitoringSubscriptionRequest := &siri.SIRIVehicleMonitoringSubscriptionRequest{
        ConsumerAddress:   subscriber.connector.Partner().Address(),
        MessageIdentifier: subscriber.connector.Partner().NewMessageIdentifier(),
        RequestorRef:      subscriber.connector.Partner().RequestorRef(),
        RequestTimestamp:  subscriber.Clock().Now(),
    }

    subIds := []string{}
    linesToLog := []string{}
    for subId, subscriptionRequest := range subscriptionRequests {
        for _, m := range subscriptionRequest.modelsToRequest {
            entry := &siri.SIRIVehicleMonitoringSubscriptionRequestEntry{
                SubscriberRef:          subscriber.connector.Partner().RequestorRef(),
                SubscriptionIdentifier: string(subId),
                InitialTerminationTime: subscriber.Clock().Now().Add(48 * time.Hour),
            }
            entry.MessageIdentifier = subscriptionRequest.requestMessageRef
            entry.RequestTimestamp = subscriber.Clock().Now()

            switch m.kind {
            case "Line":
                entry.LineRef = m.code.Value()
                linesToLog = append(linesToLog, entry.LineRef)
                subIds = append(subIds, string(subId))
            }
            siriVehicleMonitoringSubscriptionRequest.Entries = append(siriVehicleMonitoringSubscriptionRequest.Entries, entry)
        }
    }

    message.RequestIdentifier = siriVehicleMonitoringSubscriptionRequest.MessageIdentifier
    message.RequestRawMessage, _ = siriVehicleMonitoringSubscriptionRequest.BuildXML(subscriber.connector.Partner().SIRIEnvelopeType())
    message.RequestSize = int64(len(message.RequestRawMessage))
    message.Lines = linesToLog
    message.SubscriptionIdentifiers = subIds

    startTime := subscriber.Clock().Now()
    response, err := subscriber.connector.Partner().SIRIClient().VehicleMonitoringSubscription(siriVehicleMonitoringSubscriptionRequest)
    message.ProcessingTime = subscriber.Clock().Since(startTime).Seconds()
    if err != nil {
        logger.Log.Debugf("Error while subscribing: %v", err)
        e := fmt.Sprintf("Error during VehicleMonitoringSubscriptionRequest: %v", err)

        collectSubscriber.IncrementRetryCountFromMap(subscriptionRequests)

        message.Status = "Error"
        message.ErrorDetails = e
        return
    }

    message.ResponseRawMessage = response.RawXML()
    message.ResponseSize = int64(len(message.ResponseRawMessage))
    message.ResponseIdentifier = response.ResponseMessageIdentifier()

    collectSubscriber.HandleResponse(subscriptionRequests, message, response)

    if len(subscriptionRequests) == 0 {
        return
    }

    collectSubscriber.IncrementRetryCountFromMap(subscriptionRequests)
}

func (subscriber *VMSubscriber) newBQEvent() *audit.BigQueryMessage {
    return &audit.BigQueryMessage{
        Type:      "VehicleMonitoringSubscriptionRequest",
        Protocol:  "siri",
        Direction: "sent",
        Partner:   string(subscriber.connector.partner.Slug()),
        Status:    "OK",
    }
}