af83/edwig

package core

import (
    "fmt"

    "bitbucket.org/enroute-mobi/ara/audit"
    "bitbucket.org/enroute-mobi/ara/model"
    "bitbucket.org/enroute-mobi/ara/siri/siri"
    "bitbucket.org/enroute-mobi/ara/siri/sxml"
    "bitbucket.org/enroute-mobi/ara/state"
)

type LinesDiscoveryRequestCollector interface {
    state.Startable

    RequestLines()
}

type SIRILinesDiscoveryRequestCollector struct {
    connector

    lineUpdateSubscriber UpdateSubscriber
}

type SIRILinesDiscoveryRequestCollectorFactory struct{}

func (factory *SIRILinesDiscoveryRequestCollectorFactory) CreateConnector(partner *Partner) Connector {
    return NewSIRILinesDiscoveryRequestCollector(partner)
}

func (factory *SIRILinesDiscoveryRequestCollectorFactory) Validate(apiPartner *APIPartner) {
    apiPartner.ValidatePresenceOfRemoteCodeSpace()
    apiPartner.ValidatePresenceOfRemoteCredentials()
}

func NewSIRILinesDiscoveryRequestCollector(partner *Partner) *SIRILinesDiscoveryRequestCollector {
    connector := &SIRILinesDiscoveryRequestCollector{}
    connector.partner = partner
    manager := partner.Referential().CollectManager()
    connector.lineUpdateSubscriber = manager.BroadcastUpdateEvent

    return connector
}

func (connector *SIRILinesDiscoveryRequestCollector) Start() {
    connector.remoteCodeSpace = connector.partner.RemoteCodeSpace()
}

func (connector *SIRILinesDiscoveryRequestCollector) SetSubscriber(subscriber UpdateSubscriber) {
    connector.lineUpdateSubscriber = subscriber
}

func (connector *SIRILinesDiscoveryRequestCollector) broadcastUpdateEvent(event model.UpdateEvent) {
    if connector.lineUpdateSubscriber != nil {
        connector.lineUpdateSubscriber(event)
    }
}

func (connector *SIRILinesDiscoveryRequestCollector) RequestLines() {
    message := connector.newBQEvent()
    defer audit.CurrentBigQuery(string(connector.Partner().Referential().Slug())).WriteEvent(message)

    startTime := connector.Clock().Now()

    request := &siri.SIRILinesDiscoveryRequest{
        MessageIdentifier: connector.Partner().NewMessageIdentifier(),
        RequestorRef:      connector.Partner().RequestorRef(),
        RequestTimestamp:  startTime,
    }

    connector.logSIRILinesDiscoveryRequest(message, request)

    response, err := connector.Partner().SIRIClient().LineDiscovery(request)
    message.ProcessingTime = connector.Clock().Since(startTime).Seconds()
    if err != nil {
        e := fmt.Sprintf("Error during LinesDiscovery: %v", err)

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

    logXMLLinesDiscoveryResponse(message, response)

    if !response.Status() {
        return
    }

    lineRefs := []string{}
    partner := string(connector.Partner().Slug())

    for _, annotatedLine := range response.AnnotatedLineRefs() {
        lineRefs = append(lineRefs, annotatedLine.LineRef())
        event := model.NewLineUpdateEvent()

        event.Origin = partner
        event.Code = model.NewCode(connector.remoteCodeSpace, annotatedLine.LineRef())
        event.Name = annotatedLine.LineName()

        connector.broadcastUpdateEvent(event)
    }

    connector.partner.RegisterDiscoveredLines(lineRefs)
    message.Lines = lineRefs
}

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

func (connector *SIRILinesDiscoveryRequestCollector) logSIRILinesDiscoveryRequest(message *audit.BigQueryMessage, request *siri.SIRILinesDiscoveryRequest) {
    message.RequestIdentifier = request.MessageIdentifier

    xml, err := request.BuildXML(connector.Partner().SIRIEnvelopeType())
    if err != nil {
        return
    }

    message.RequestRawMessage = xml
    message.RequestSize = int64(len(xml))
}

func logXMLLinesDiscoveryResponse(message *audit.BigQueryMessage, response *sxml.XMLLinesDiscoveryResponse) {
    if !response.Status() {
        message.Status = "Error"
        message.ErrorDetails = response.ErrorString()
    }

    message.ResponseRawMessage = response.RawXML()
    message.ResponseSize = int64(len(message.ResponseRawMessage))
}