corrects lint errors and index method

tplink.go

@@ -94,7 +94,7 @@ func encrypt(plaintext string) []byte {
  n := len(plaintext)
  buf := new(bytes.Buffer)
  binary.Write(buf, binary.BigEndian, uint32(n))
- ciphertext := []byte(buf.Bytes())
+ ciphertext := buf.Bytes()
 
  key := byte(0xAB)
  payload := make([]byte, n)
@@ -116,7 +116,7 @@ func decrypt(ciphertext []byte) string {
  var nextKey byte
  for i := 0; i < n; i++ {
  nextKey = ciphertext[i]
- ciphertext[i] = ciphertext[i] ^ key
+ ciphertext[i] ^= key
  key = nextKey
  }
  return string(ciphertext)
@@ -126,7 +126,7 @@ func send(host string, dataSend []byte) ([]byte, error) {
  var header = make([]byte, 4)
 
  // establish connection (two second timeout)
- conn, err := net.DialTimeout("tcp", host+":9999", time.Duration(time.Second*2))
+ conn, err := net.DialTimeout("tcp", host+":9999", time.Second*2)
  if err != nil {
  return []byte(""), err
  }
@@ -225,7 +225,7 @@ func (s *Tplink) TurnOnChild(id int) error {
  return err
  }
 
- payload.Context.ChildIds[0] = devID + fmt.Sprintf("%02d", id)
+ payload.Context.ChildIds = append(payload.Context.ChildIds, devID+fmt.Sprintf("%02d", id))
  payload.System.SetRelayState.State = 1
 
  j, _ := json.Marshal(payload)
@@ -245,7 +245,7 @@ func (s *Tplink) TurnOffChild(id int) error {
  return err
  }
 
- payload.Context.ChildIds[0] = devID + fmt.Sprintf("%02d", id)
+ payload.Context.ChildIds = append(payload.Context.ChildIds, devID+fmt.Sprintf("%02d", id))
  payload.System.SetRelayState.State = 0
 
  j, _ := json.Marshal(payload)