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fns.go
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fns.go
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package fns
import (
"bytes"
"context"
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"net/http"
"strconv"
"strings"
"time"
)
var UserAlreadyRegisteredErr = errors.New("user already registered")
var BadPhoneErr = errors.New("bad phone")
var BadEmailErr = errors.New("bad email")
// Example: t=20200115T2110&s=1030.00&fn=9251440300046840&i=29414&fp=1250830908&n=1
func ParseQrStr(str string) (fn string, opType, fd, fpd int, date time.Time, sum float32, err error) {
params := strings.Split(str, "&")
if len(params) != 6 {
err = fmt.Errorf("unexpected params count %v. 6 expected", len(params))
return
}
for _, param := range params {
kv := strings.Split(param, "=")
if len(kv) != 2 {
err = fmt.Errorf("bad kv at %v", param)
return
}
switch kv[0] {
case "t":
date, err = time.Parse("20060102T1504", kv[1])
if err != nil {
date, err = time.Parse("20060102T150405", kv[1])
if err != nil {
err = fmt.Errorf("bad date %v", kv[1])
return
}
}
case "s":
s, e := strconv.ParseFloat(kv[1], 32)
if e != nil {
err = fmt.Errorf("bad sum %v", kv[1])
return
}
sum = float32(s)
case "fn":
fn = kv[1]
case "i":
fd, err = strconv.Atoi(kv[1])
if err != nil {
err = fmt.Errorf("bad fd %v", kv[1])
return
}
case "fp":
fpd, err = strconv.Atoi(kv[1])
if err != nil {
err = fmt.Errorf("bad fpd %v", kv[1])
return
}
case "n":
opType, err = strconv.Atoi(kv[1])
if err != nil {
err = fmt.Errorf("bad opType %v", kv[1])
return
}
default:
err = fmt.Errorf("unexpected key %v", kv[0])
return
}
}
return
}
func Register(ctx context.Context, email, name, phone string) error {
body, err := json.Marshal(struct {
Email string `json:"email"`
Name string `json:"name"`
Phone string `json:"phone"`
}{
Email: email, Name: name, Phone: phone,
})
if err != nil {
return err
}
req, err := http.NewRequestWithContext(ctx, "POST", "https://proverkacheka.nalog.ru:9999/v1/mobile/users/signup", bytes.NewReader(body))
if err != nil {
return err
}
req.Header.Add("Content-Type", "application/json; charset=UTF-8")
resp, err := (&http.Client{}).Do(req)
if err != nil {
return err
}
defer resp.Body.Close()
switch resp.StatusCode {
case http.StatusNoContent:
return nil
case http.StatusConflict:
return UserAlreadyRegisteredErr
default:
data, err := ioutil.ReadAll(resp.Body)
if err != nil {
return err
}
if strings.Index(string(data), "bad_email") > 0 {
return BadEmailErr
}
if strings.Index(string(data), "bad_phone") > 0 {
return BadPhoneErr
}
return fmt.Errorf("unexpected response %v:%v", resp.StatusCode, string(data))
}
}
// CheckReceipt returns nil if receipt exists
func CheckReceipt(ctx context.Context, fn string, opType, fd, fpd int, date time.Time, sum float32) error {
req, err := http.NewRequestWithContext(ctx, "GET", fmt.Sprintf("https://proverkacheka.nalog.ru:9999/v1/ofds/*/inns/*/fss/%v/operations/%v/tickets/%v?fiscalSign=%v&date=%v&sum=%v", fn, opType, fd, fpd, date.Format("2006-01-02T15:04:05"), sum*100), nil)
if err != nil {
return err
}
resp, err := (&http.Client{}).Do(req)
if err != nil {
return err
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusNoContent {
return fmt.Errorf("unexpected code %v", resp.StatusCode)
}
return nil
}
// GetReceipt returns full receipt info
func GetReceipt(ctx context.Context, phone, pass string, fn string, fd, fpd int) (Receipt, error) {
req, err := http.NewRequestWithContext(ctx, "GET", fmt.Sprintf("https://proverkacheka.nalog.ru:9999/v1/inns/*/kkts/*/fss/%v/tickets/%v?fiscalSign=%v&sendToEmail=no", fn, fd, fpd), nil)
if err != nil {
return Receipt{}, err
}
req.Header.Add("device-id", "")
req.Header.Add("device-os", "")
req.SetBasicAuth(phone, pass)
resp, err := (&http.Client{}).Do(req)
if err != nil {
return Receipt{}, err
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return Receipt{}, fmt.Errorf("unexpected code %v", resp.StatusCode)
}
dec := json.NewDecoder(resp.Body)
var prj receiptPrj
if err := dec.Decode(&prj); err != nil {
return Receipt{}, fmt.Errorf("unable to decode response: %w", err)
}
return NewReceipt(prj)
}