func LoadPolygonFromFile(ctx *gin.Context, conn *store.Connection) {
filename := "./tnassemble.geojson"
f_coll := new(geojson.FeatureCollection)
file, _ := os.Open(filename)
log.Debugf(conn.Context, fmt.Sprintf("file %#v", file))
jsonParser := json.NewDecoder(file)
log.Debugf(conn.Context, fmt.Sprintf("jsonParser %#v", jsonParser))
jsonParser.Decode(&f_coll)
log.Debugf(conn.Context, fmt.Sprintf("profiles %#v", f_coll))
for _, feature := range f_coll.Features {
p := make([]Point, 0)
constituency := &Constituency{}
prop := feature.Properties
constituency.Assemb_Const = prop["ac_name"].(string)
constituency.Parl_Const = prop["pc_name"].(string)
constituency.State = prop["state"].(string)
geom, _ := feature.GetGeometry()
multiline := geom.GetGeometry()
mli := multiline.(geojson.MultiLine)
for _, coord := range mli {
for _, point := range coord {
lon := float64(point[0])
lat := float64(point[1])
p = append(p, Point{Lat: lat, Lng: lon})
}
}
constituency.Points = p
conn.Add(constituency)
}
file.Close()
}
func PointInPolygon(ctx *gin.Context, conn *store.Connection, lat float64, lon float64) store.Response {
chans := make([]<-chan int64, 0)
search := geo.NewPoint(lat, lon)
resp := conn.ListKeys(Constituency{})
keys := resp.Data.([]*datastore.Key)
for _, k := range keys {
if Cache[k.IntID()] == nil {
con := &Constituency{Id: k.IntID()}
resp = conn.Get(con)
Cache[k.IntID()] = BuildPolygon(con)
}
chans = append(chans, Process(k.IntID(), search))
}
resp.Data = new(map[string]string)
for n := range merge(chans) {
if n != 0 {
con := &Constituency{Id: n}
resp = conn.Get(con)
con.Points = nil
resp.Data = con
}
}
return resp
}