func GetSales(rw http.ResponseWriter, r *http.Request, enc encoding.Encoder, params martini.Params) string { var err error var ps customer.Prices var c customer.Customer id := r.FormValue("id") if id == "" { id = params["id"] } if c.Id, err = strconv.Atoi(id); err != nil { apierror.GenerateError("Trouble getting customer ID", err, rw, r) return "" } start := r.FormValue("start") end := r.FormValue("end") startDate, err := time.Parse(inputTimeFormat, start) if err != nil { apierror.GenerateError("Trouble getting sales start date", err, rw, r) return "" } endDate, err := time.Parse(inputTimeFormat, end) if err != nil { apierror.GenerateError("Trouble getting sales end date", err, rw, r) return "" } ps, err = c.GetPricesBySaleRange(startDate, endDate) if err != nil { apierror.GenerateError("Trouble getting prices by sales range", err, rw, r) return "" } return encoding.Must(enc.Encode(ps)) }