visedriver-africastalking/internal/africastalking/parse.go
2025-01-05 07:19:45 +00:00

122 lines
2.8 KiB
Go

package at
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
"strings"
"git.grassecon.net/urdt/ussd/common"
"git.grassecon.net/urdt/ussd/errors"
)
type ATRequestParser struct {
Context context.Context
}
func (arp *ATRequestParser) GetSessionId(rq any) (string, error) {
rqv, ok := rq.(*http.Request)
if !ok {
logg.Warnf("got an invalid request", "req", rq)
return "", errors.ErrInvalidRequest
}
// Capture body (if any) for logging
body, err := io.ReadAll(rqv.Body)
if err != nil {
logg.Warnf("failed to read request body", "err", err)
return "", fmt.Errorf("failed to read request body: %v", err)
}
// Reset the body for further reading
rqv.Body = io.NopCloser(bytes.NewReader(body))
// Log the body as JSON
bodyLog := map[string]string{"body": string(body)}
logBytes, err := json.Marshal(bodyLog)
if err != nil {
logg.Warnf("failed to marshal request body", "err", err)
} else {
decodedStr := string(logBytes)
sessionId, err := extractATSessionId(decodedStr)
if err != nil {
context.WithValue(arp.Context, "at-session-id", sessionId)
}
logg.Debugf("Received request:", decodedStr)
}
if err := rqv.ParseForm(); err != nil {
logg.Warnf("failed to parse form data", "err", err)
return "", fmt.Errorf("failed to parse form data: %v", err)
}
phoneNumber := rqv.FormValue("phoneNumber")
if phoneNumber == "" {
return "", fmt.Errorf("no phone number found")
}
formattedNumber, err := common.FormatPhoneNumber(phoneNumber)
if err != nil {
logg.Warnf("failed to format phone number", "err", err)
return "", fmt.Errorf("failed to format number")
}
return formattedNumber, nil
}
func (arp *ATRequestParser) GetInput(rq any) ([]byte, error) {
rqv, ok := rq.(*http.Request)
if !ok {
return nil, errors.ErrInvalidRequest
}
if err := rqv.ParseForm(); err != nil {
return nil, fmt.Errorf("failed to parse form data: %v", err)
}
text := rqv.FormValue("text")
parts := strings.Split(text, "*")
if len(parts) == 0 {
return nil, fmt.Errorf("no input found")
}
return []byte(parts[len(parts)-1]), nil
}
func parseQueryParams(query string) map[string]string {
params := make(map[string]string)
queryParams := strings.Split(query, "&")
for _, param := range queryParams {
// Split each key-value pair by '='
parts := strings.SplitN(param, "=", 2)
if len(parts) == 2 {
params[parts[0]] = parts[1]
}
}
return params
}
func extractATSessionId(decodedStr string) (string, error) {
var data map[string]string
err := json.Unmarshal([]byte(decodedStr), &data)
if err != nil {
logg.Errorf("Error unmarshalling JSON: %v", err)
return "", nil
}
decodedBody, err := url.QueryUnescape(data["body"])
if err != nil {
logg.Errorf("Error URL-decoding body: %v", err)
return "", nil
}
params := parseQueryParams(decodedBody)
sessionId := params["sessionId"]
return sessionId, nil
}