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
}
