Use IDFM website instead of official API

api/stations.go

@@ -3,73 +3,136 @@ package api
 import (
 	"encoding/json"
 	"fmt"
-	"log"
+	"io/ioutil"
 	"net/http"
-	"os"
+	"net/url"
 	"strings"
+	"unicode"
 
 	"github.com/gin-gonic/gin"
+
+	"golang.org/x/text/transform"
+	"golang.org/x/text/unicode/norm"
 )
 
 type IDFMStation struct {
-	DatasetID string `json:"datasetid"`
-	RecordIDs string `json:"recordid"`
-	Fields    struct {
-		Id            string    `json:"id"`
-		PointGeo      []float64 `json:"pointgeo"`
-		StopId        string    `json:"stop_id"`
-		StopName      string    `json:"stop_name"`
-		OperatorName  string    `json:"operatorname"`
-		NomCommune    string    `json:"nom_commune"`
-		RouteLongName string    `json:"route_long_name"`
-		StopLat       string    `json:"stop_lat"`
-		StopLon       string    `json:"stop_lon"`
-		CodeINSEE     string    `json:"code_insee"`
-	} `json:"fields"`
-	Geometry struct {
-		Type        string    `json:"type"`
-		Coordinates []float64 `json:"coordinates"`
-	} `json:"geometry"`
+	Type     string  `json:"type"`
+	Id       string  `json:"id"`
+	X        float64 `json:"x"`
+	Y        float64 `json:"y"`
+	Name     string  `json:"name"`
+	ZipCode  string  `json:"zipCode"`
+	City     string  `json:"city"`
+	Elevator bool    `json:"elevator"`
+}
+
+func (s *IDFMStation) ComputeSlug() string {
+	isMn := func(r rune) bool {
+		return unicode.Is(unicode.Mn, r) // Mn: nonspacing marks
+	}
+	t := transform.Chain(norm.NFD, transform.RemoveFunc(isMn), norm.NFC)
+
+	r, _ := ioutil.ReadAll(transform.NewReader(strings.NewReader(s.Name), t))
+
+	return strings.ToLower(strings.Replace(strings.Replace(strings.Replace(string(r), " ", "+", -1), "'", "+", -1), "-", "+", -1))
 }
 
 type PGStation struct {
-	Id   string `json:"slug"`
+	Id   string `json:"id"`
 	Name string `json:"name"`
+	Slug string `json:"slug"`
 }
 
 var IDFMStations []IDFMStation
 
-func init() {
-	fd, err := os.Open("arrets-lignes.json")
+func searchStation(code, station string) (string, error) {
+	stations, err := getStations(code)
 	if err != nil {
-		log.Fatal("Unable to open `arrets-lignes.json`:", err.Error())
+		return station, err
 	}
-	defer fd.Close()
 
-	dec := json.NewDecoder(fd)
-	if err = dec.Decode(&IDFMStations); err != nil {
-		log.Fatal("Unable to decode `arrets-lignes.json`:", err.Error())
+	code = strings.TrimPrefix(code, "line:IDFM:")
+
+	for _, st := range stations {
+		if st.ComputeSlug() == station {
+			return st.Id, nil
+		}
 	}
+
+	return station, nil
+}
+
+func getStations(code string) (stations []IDFMStation, err error) {
+	rurl, err := url.JoinPath(IDFM_BASEURL, "lines", code, "stops")
+	if err != nil {
+		return nil, err
+	}
+
+	requrl, err := url.Parse(rurl)
+	if err != nil {
+		return nil, err
+	}
+
+	reqquery := url.Values{}
+	reqquery.Add("stopPoints", "false")
+	reqquery.Add("routes", "false")
+	requrl.RawQuery = reqquery.Encode()
+
+	req, err := http.NewRequest("GET", requrl.String(), nil)
+	if err != nil {
+		return nil, err
+	}
+
+	req.Header.Add("Accept", "application/json")
+
+	res, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer res.Body.Close()
+
+	if res.StatusCode >= 400 {
+		return nil, fmt.Errorf("Line not found")
+	}
+
+	dec := json.NewDecoder(res.Body)
+	if err = dec.Decode(&stations); err != nil {
+		return nil, err
+	}
+
+	return
 }
 
 func declareStationsRoutes(router *gin.RouterGroup) {
 	router.GET("/stations/:type/:code", func(c *gin.Context) {
-		code := convertLineCode(string(c.Param("code")))
+		t := convertLineType(string(c.Param("type")))
+		code := string(c.Param("code"))
 
-		var stations []PGStation
-		for _, station := range IDFMStations {
-			if station.Fields.Id == code {
-				pgstation := PGStation{
-					Id:   fmt.Sprintf("STIF:StopPoint:Q:%s:", strings.TrimPrefix(station.Fields.StopId, "IDFM:")),
-					Name: station.Fields.StopName,
-				}
-
-				stations = append(stations, pgstation)
+		if !strings.HasPrefix(code, "line:IDFM:") {
+			if len(code) != 6 || !strings.HasPrefix(code, "C") {
+				code = searchLine(t, code)
 			}
+
+			code = "line:IDFM:" + code
+		}
+
+		stations, err := getStations(code)
+		if err != nil {
+			c.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{"errmsg": err.Error()})
+			return
+		}
+
+		var pgs []PGStation
+		for _, station := range stations {
+			pgs = append(pgs, PGStation{
+				Id:   station.Id,
+				Name: station.Name,
+				Slug: station.ComputeSlug(),
+			})
 		}
 
 		c.JSON(http.StatusOK, APIResult(c, map[string][]PGStation{
-			"stations": stations,
+			"stations": pgs,
 		}))
 	})
 }