Add IVBEFAClient
This commit is contained in:
Paul Brinkmeier
parent
710b63045f
commit
c836a3b201
232
efa_client.go
232
efa_client.go
@ -1,19 +1,233 @@
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package main
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import "cmp"
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import "encoding/json"
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import "errors"
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import "fmt"
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import "net/http"
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import "net/url"
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import "slices"
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import "strconv"
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import "strings"
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import "time"
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type EFAClient interface {
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GetName() string
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BuildRequest(string) (*http.Request, error)
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ParseResponse(*http.Response) (Departures, error)
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}
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func FetchDepartures(c EFAClient, stopId string) (Departures, error) {
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req, err := c.BuildRequest(stopId)
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if err != nil {
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return Departures{}, err
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}
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// Send the request, wait max 10 seconds
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client := http.Client{
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Timeout: 10 * time.Second,
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}
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res, err := client.Do(req)
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if err != nil {
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return Departures{}, err
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}
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return c.ParseResponse(res)
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}
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// JSON unmarshaling types for departure monitor API
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type DMResponse struct {
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DateTime DMDateTime `json:"dateTime"`
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DepartureList []DMDeparture `json:"departureList"`
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}
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type DMDeparture struct {
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StopName string `json:"stopName"`
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Platform string `json:"platform"`
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Countdown string `json:"countdown"`
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DateTime DMDateTime `json:"dateTime"`
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RealDateTime *DMDateTime `json:"realDateTime"`
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ServingLine DMServingLine `json:"servingLine"`
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OnwardStopSeq []DMStop `json:"onwardStopSeq"`
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}
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type DMServingLine struct {
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Symbol string `json:"symbol"`
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Direction string `json:"direction"`
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}
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type DMStop struct {
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PlaceID string `json:"placeID"`
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Place string `json:"place"`
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NameWO string `json:"nameWO"`
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}
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type DMDateTime struct {
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Hour string `json:"hour"`
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Minute string `json:"minute"`
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}
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// Types for JSON marshaling
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type Departures struct {
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Departures []Departure `json:"departures"`
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ServerTime string `json:"serverTime"`
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}
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type Departure struct {
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Platform string `json:"platform"`
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Symbol string `json:"symbol"`
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Direction string `json:"direction"`
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Leaving string `json:"leaving"`
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Countdown int `json:"-"`
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}
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func ParseDMResponse(res *http.Response) (Departures, error) {
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defer res.Body.Close()
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var dmResponse DMResponse
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err := json.NewDecoder(res.Body).Decode(&dmResponse)
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if err != nil {
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return Departures{}, err
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}
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return parseDepartures(dmResponse)
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}
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func parseDepartures(response DMResponse) (Departures, error) {
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var ds []Departure
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for _, d := range response.DepartureList {
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direction := d.ServingLine.Direction
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// If available, use name of last stop as direction
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// Note that OnwardStopSeq is only populated if includeCompleteStopSeq=1 is set.
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if len(d.OnwardStopSeq) != 0 {
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last := d.OnwardStopSeq[len(d.OnwardStopSeq)-1]
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if slices.Contains([]string{"5", "6"}, last.PlaceID) {
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direction = last.NameWO
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}
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}
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leaving := fmt.Sprintf("%s min", d.Countdown)
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countdown, err := strconv.Atoi(d.Countdown)
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if err != nil {
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return Departures{}, errors.New("could not parse countdown")
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}
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isInThePast := countdown < 0
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if isInThePast {
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continue
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}
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if countdown == 0 {
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leaving = "sofort"
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}
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if countdown > 20 {
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dt := d.DateTime
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if d.RealDateTime != nil {
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dt = *d.RealDateTime
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}
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leaving = fmt.Sprintf("%02s:%02s", dt.Hour, dt.Minute)
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}
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ds = append(ds, Departure{
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d.Platform,
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d.ServingLine.Symbol,
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direction,
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leaving,
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countdown,
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})
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}
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slices.SortFunc(ds, func(a Departure, b Departure) int {
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return cmp.Compare(a.Countdown, b.Countdown)
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})
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dt := response.DateTime
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return Departures{
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ds,
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fmt.Sprintf("%02s:%02s", dt.Hour, dt.Minute),
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}, nil
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}
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var allEfaClients []EFAClient = []EFAClient{
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IVBEFAClient{},
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BwegtEFAClient{},
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VRNEFAClient{},
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KVVEFAClient{},
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VAGEFAClient{},
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VRNEFAClient{},
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}
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type IVBEFAClient struct {
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}
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func (c IVBEFAClient) GetName() string {
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return "IVB"
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}
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func (c IVBEFAClient) BuildRequest(stopId string) (*http.Request, error) {
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// curl https://smartinfo.ivb.at/api/JSON/PASSAGE'?stopID=64003&count=3'
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req, err := http.NewRequest("GET", "https://smartinfo.ivb.at/api/JSON/PASSAGE", nil)
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if err != nil {
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return nil, err
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}
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query := url.Values{}
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query.Set("stopID", stopId)
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req.URL.RawQuery = query.Encode()
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return req, nil
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}
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func (c IVBEFAClient) ParseResponse(res *http.Response) (Departures, error) {
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defer res.Body.Close()
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var response []IVBResponseElem
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err := json.NewDecoder(res.Body).Decode(&response)
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if err != nil {
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return Departures{}, err
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}
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var ds []Departure
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for _, responseElem := range response {
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if responseElem.Smartinfo == nil {
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continue
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}
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si := responseElem.Smartinfo
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leaving := si.Time
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if leaving == "0 min" {
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leaving = "sofort"
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}
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ds = append(ds, Departure{
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si.Plabel,
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si.Route,
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si.Direction,
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leaving,
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// TODO
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0,
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})
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}
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return Departures{
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ds,
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fmt.Sprintf("%02d:%02d", 0, 0),
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}, nil
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}
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// IVB smartinfo API unmarshaling types
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type IVBResponseElem struct {
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Smartinfo *IVBSmartInfo `json:"smartinfo"`
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}
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type IVBSmartInfo struct {
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Uid string `json:"uid"`
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Route string `json:"route"`
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Direction string `json:"direction"`
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Time string `json:"time"`
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Plabel string `json:"plabel"`
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}
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type VRNEFAClient struct {
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@ -48,6 +262,10 @@ func (c VRNEFAClient) BuildRequest(stopId string) (*http.Request, error) {
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return req, nil
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}
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func (c VRNEFAClient) ParseResponse(res *http.Response) (Departures, error) {
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return ParseDMResponse(res)
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}
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type KVVEFAClient struct {
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}
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@ -78,6 +296,10 @@ func (c KVVEFAClient) BuildRequest(stopId string) (*http.Request, error) {
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return req, nil
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}
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func (c KVVEFAClient) ParseResponse(res *http.Response) (Departures, error) {
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return ParseDMResponse(res)
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}
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type BwegtEFAClient struct {
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}
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@ -110,6 +332,10 @@ func (c BwegtEFAClient) BuildRequest(stopId string) (*http.Request, error) {
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return req, nil
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}
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func (c BwegtEFAClient) ParseResponse(res *http.Response) (Departures, error) {
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return ParseDMResponse(res)
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}
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type VAGEFAClient struct {
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}
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@ -141,3 +367,7 @@ func (c VAGEFAClient) BuildRequest(stopId string) (*http.Request, error) {
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return req, nil
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}
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func (c VAGEFAClient) ParseResponse(res *http.Response) (Departures, error) {
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return ParseDMResponse(res)
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}
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148
main.go
148
main.go
@ -1,148 +1,13 @@
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package main
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import "cmp"
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import "encoding/json"
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import "errors"
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import "fmt"
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import "log"
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import "net/http"
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import "os"
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import "slices"
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import "strings"
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import "strconv"
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import "sync/atomic"
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import "time"
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// JSON unmarshaling types for departure monitor API
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type DMResponse struct {
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DateTime DMDateTime `json:"dateTime"`
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DepartureList []DMDeparture `json:"departureList"`
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}
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type DMDeparture struct {
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StopName string `json:"stopName"`
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Platform string `json:"platform"`
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Countdown string `json:"countdown"`
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DateTime DMDateTime `json:"dateTime"`
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RealDateTime *DMDateTime `json:"realDateTime"`
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ServingLine DMServingLine `json:"servingLine"`
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OnwardStopSeq []DMStop `json:"onwardStopSeq"`
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}
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type DMServingLine struct {
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Symbol string `json:"symbol"`
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Direction string `json:"direction"`
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}
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type DMStop struct {
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PlaceID string `json:"placeID"`
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Place string `json:"place"`
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NameWO string `json:"nameWO"`
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}
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type DMDateTime struct {
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Hour string `json:"hour"`
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Minute string `json:"minute"`
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}
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func FetchDepartures(c EFAClient, stopId string) (DMResponse, error) {
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req, err := c.BuildRequest(stopId)
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if err != nil {
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return DMResponse{}, err
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}
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// Send the request, wait max 10 seconds
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client := http.Client{
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Timeout: 10 * time.Second,
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}
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res, err := client.Do(req)
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if err != nil {
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return DMResponse{}, err
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}
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defer res.Body.Close()
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var dmResponse DMResponse
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err = json.NewDecoder(res.Body).Decode(&dmResponse)
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if err != nil {
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return DMResponse{}, err
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}
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return dmResponse, nil
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}
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// Types for JSON marshaling
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type Departures struct {
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Departures []Departure `json:"departures"`
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ServerTime string `json:"serverTime"`
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}
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type Departure struct {
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Platform string `json:"platform"`
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Symbol string `json:"symbol"`
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Direction string `json:"direction"`
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Leaving string `json:"leaving"`
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Countdown int `json:"-"`
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}
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func ParseDepartures(response DMResponse, allowedPlatform *string) (Departures, error) {
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var ds []Departure
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for _, d := range response.DepartureList {
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direction := d.ServingLine.Direction
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// If available, use name of last stop as direction
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// Note that OnwardStopSeq is only populated if includeCompleteStopSeq=1 is set.
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if len(d.OnwardStopSeq) != 0 {
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last := d.OnwardStopSeq[len(d.OnwardStopSeq)-1]
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if slices.Contains([]string{"5", "6"}, last.PlaceID) {
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direction = last.NameWO
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}
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}
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leaving := fmt.Sprintf("%s min", d.Countdown)
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countdown, err := strconv.Atoi(d.Countdown)
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if err != nil {
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return Departures{}, errors.New("could not parse countdown")
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}
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matchesPlatform := allowedPlatform == nil || d.Platform == *allowedPlatform
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isInThePast := countdown < 0
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if !matchesPlatform || isInThePast {
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continue
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}
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if countdown == 0 {
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leaving = "sofort"
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}
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if countdown > 20 {
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dt := d.DateTime
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if d.RealDateTime != nil {
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dt = *d.RealDateTime
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}
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leaving = fmt.Sprintf("%02s:%02s", dt.Hour, dt.Minute)
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}
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ds = append(ds, Departure{
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d.Platform,
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d.ServingLine.Symbol,
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direction,
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leaving,
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countdown,
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})
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}
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slices.SortFunc(ds, func(a Departure, b Departure) int {
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return cmp.Compare(a.Countdown, b.Countdown)
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})
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dt := response.DateTime
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return Departures{
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ds,
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fmt.Sprintf("%02s:%02s", dt.Hour, dt.Minute),
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}, nil
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}
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func main() {
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password := os.Getenv("VRNP_PASSWORD")
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@ -177,23 +42,20 @@ func main() {
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}
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stopId := query["stop_id"][0]
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/*
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var platform *string = nil
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if query["platform"] != nil && len(query["platform"]) != 0 {
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platform = &query["platform"][0]
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}
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*/
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c := efaClients[(efaClient.Add(1)-1)%uint64(len(efaClients))]
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ds, err := FetchDepartures(c, stopId)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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departures, err := ParseDepartures(ds, platform)
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departures, err := FetchDepartures(c, stopId)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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// TODO: Filter for platform here
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// Does not handle multiple media types
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if r.Header.Get("Accept") == "application/json" {
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@ -203,7 +65,7 @@ func main() {
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// plain text
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for _, d := range departures.Departures {
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fmt.Fprintf(w, "%2s %-11s %6s\n",
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d.Symbol,
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d.Symbol[:min(2, len(d.Symbol))],
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d.Direction[:min(11, len(d.Direction))],
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d.Leaving,
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)
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