Merge pull request #1 from codenoid/patch-sanitize-name

fix(input sanitize): Sanitize telegram user's name

handler.go

@@ -134,6 +134,7 @@ func onJoin(c tele.Context) error {
  }
 
  status.UserFullName = c.Sender().FirstName + " " + c.Sender().LastName
+ status.UserFullName = sanitizeName(status.UserFullName)
 
  db.Set(kvID, status, minikv.DefaultExpiration)
 

helper.go

@@ -2,6 +2,7 @@ package main
 
 import (
  "fmt"
+ "strings"
 
  tele "gopkg.in/tucnak/telebot.v3"
 )
@@ -24,3 +25,22 @@ func stringInSlice(a string, list []string) bool {
  }
  return false
 }
+
+func removeRedundantSpaces(s string) string {
+ return strings.Join(strings.Fields(s), " ")
+}
+
+func sanitizeName(s string) string {
+ var result strings.Builder
+ for i := 0; i < len(s); i++ {
+ b := s[i]
+ if ('a' <= b && b <= 'z') ||
+ ('A' <= b && b <= 'Z') ||
+ ('0' <= b && b <= '9') ||
+ b == ' ' {
+ result.WriteByte(b)
+ }
+ }
+ clean := removeRedundantSpaces(result.String())
+ return clean
+}