func GetMessage(messageIndex int) (*message, error) {
log.Println("GetMessage...")
status, err := SendCommand(fmt.Sprintf("AT+CMGR=%d\r", messageIndex), true)
if err != nil {
return nil, fmt.Errorf("GetMessage: Failed to send command.\n%s", err.Error())
}
log.Printf("GetMessage: %#v\n", status)
regex := regexp.MustCompile(`(?Us)CMGR: "([A-Z ]*)","([+\d]*)",,"([0-9/,:\+]*)"\r\n(.*)\r\n\r\nOK`)
if regex.MatchString(status) {
msg := regex.FindStringSubmatch(status)
messageLabels := msg[1]
messageSender := msg[2]
messageDate, _ := time.Parse("06/01/02,15:04:05-07", msg[3])
var messageBody string
if regexp.MustCompile(`^[0-9A-F]+$`).MatchString(msg[4]) {
bytesWritten, _ := hex.DecodeString(msg[4])
log.Println("GetMessage: bytesWritten =", bytesWritten)
regex := regexp.MustCompile(`[a-z ]{3}`)
if regex.MatchString(string(bytesWritten)) {
log.Printf("GetMessage: Decoding message #%d using plain text", messageIndex)
messageBody = string(bytesWritten)
} else {
log.Printf("GetMessage: Decoding message #%d using Ucs2", messageIndex)
messageBody, err = pdu.DecodeUcs2(bytesWritten)
if err != nil {
log.Printf("GetMessage: Failed to decode message #%d using Ucs2", messageIndex)
}
}
} else {
messageBody = msg[4]
}
log.Printf("GetMessage: %v %#v %#v %v %#v\n", messageIndex, messageLabels, messageSender, messageDate.Format(time.RFC3339), messageBody)
return &message{
Labels: messageLabels,
Date: messageDate,
Sender: messageSender,
Body: messageBody,
Index: messageIndex,
}, nil
} else {
return nil, fmt.Errorf("GetMessage: Failed to parse response: %v", status)
}
}
// handleReport detects and parses a report from the notification port represented
// as a string. The parsed values may change the inner state or be sent over out channels.
func (d *Device) handleReport(str string) (err error) {
report := Reports.Resolve(str)
str = strings.TrimSpace(strings.TrimPrefix(str, report.ID))
switch report {
case Reports.Message:
var report messageReport
if err = report.Parse(str); err != nil {
return
}
var octets []byte
octets, err = d.Commands.CMGR(report.Index)
if err != nil {
return
}
if err = d.Commands.CMGD(report.Index, DeleteOptions.Index); err != nil {
return
}
var msg sms.Message
if _, err = msg.ReadFrom(octets); err != nil {
return
}
d.messages <- &msg
case Reports.Ussd:
var ussd ussdReport
if err = ussd.Parse(str); err != nil {
return
}
var text string
if ussd.Enc == Encodings.UCS2 {
text, err = pdu.DecodeUcs2(ussd.Octets)
if err != nil {
return
}
} else if ussd.Enc == Encodings.Gsm7Bit {
text, err = pdu.Decode7Bit(ussd.Octets)
if err != nil {
return
}
} else {
return ErrUnknownEncoding
}
d.ussd <- Ussd(text)
case Reports.SignalStrength:
var rssi signalStrengthReport
if err = rssi.Parse(str); err != nil {
return
}
if d.State.SignalStrength != int(rssi) {
d.State.SignalStrength = int(rssi)
d.updated <- struct{}{}
}
case Reports.Mode:
var report modeReport
if err = report.Parse(str); err != nil {
return
}
var updated bool
if d.State.SystemMode != report.Mode {
d.State.SystemMode = report.Mode
updated = true
}
if d.State.SystemSubmode != report.Submode {
d.State.SystemSubmode = report.Submode
updated = true
}
if updated {
d.updated <- struct{}{}
}
case Reports.ServiceState:
var report serviceStateReport
if err = report.Parse(str); err != nil {
return
}
if d.State.ServiceState != Opt(report) {
d.State.ServiceState = Opt(report)
d.updated <- struct{}{}
}
case Reports.SimState:
var report simStateReport
if err = report.Parse(str); err != nil {
return
}
if d.State.SimState != Opt(report) {
d.State.SimState = Opt(report)
d.updated <- struct{}{}
}
case Reports.BootHandshake:
var token bootHandshakeReport
if err = token.Parse(str); err != nil {
return
}
if err = d.Commands.BOOT(uint64(token)); err != nil {
return
}
case Reports.Stin:
// ignore. what is this btw?
default:
switch FinalResults.Resolve(str) {
case FinalResults.Noop, FinalResults.NotSupported, FinalResults.Timeout:
// ignore
default:
return errors.New("at: unknown report: " + str)
}
}
return
}
// ReadFrom constructs a message from the supplied PDU octets. Returns the number of bytes read.
// Complies with 3GPP TS 23.040.
func (s *Message) ReadFrom(octets []byte) (n int, err error) {
*s = Message{}
buf := bytes.NewReader(octets)
scLen, err := buf.ReadByte()
n++
if err != nil {
return
}
if scLen > 12 {
return 0, ErrIncorrectSize
}
addr := make([]byte, scLen)
off, err := io.ReadFull(buf, addr)
n += off
if err != nil {
return
}
s.ServiceCenterAddress.ReadFrom(addr)
msgType, err := buf.ReadByte()
n++
if err != nil {
return
}
n--
buf.UnreadByte()
s.Type = MessageType(msgType & 0x03)
switch s.Type {
case MessageTypes.Deliver:
var sms smsDeliver
off, err2 := sms.FromBytes(octets[1+scLen:])
n += off
if err2 != nil {
return n, err2
}
s.MoreMessagesToSend = sms.MoreMessagesToSend
s.LoopPrevention = sms.LoopPrevention
s.ReplyPathExists = sms.ReplyPath
s.UserDataStartsWithHeader = sms.UserDataHeaderIndicator
s.StatusReportIndication = sms.StatusReportIndication
s.Address.ReadFrom(sms.OriginatingAddress[1:])
s.Encoding = Encoding(sms.DataCodingScheme)
s.ServiceCenterTime.ReadFrom(sms.ServiceCentreTimestamp)
switch s.Encoding {
case Encodings.Gsm7Bit:
s.Text, err = pdu.Decode7Bit(sms.UserData)
if err != nil {
return
}
s.Text = cutStr(s.Text, int(sms.UserDataLength))
case Encodings.UCS2:
s.Text, err = pdu.DecodeUcs2(sms.UserData)
if err != nil {
return
}
default:
return 0, ErrUnknownEncoding
}
case MessageTypes.Submit:
var sms smsSubmit
off, err2 := sms.FromBytes(octets[1+scLen:])
n += off
if err2 != nil {
return n, err2
}
s.RejectDuplicates = sms.RejectDuplicates
switch s.VPFormat {
case ValidityPeriodFormats.Absolute, ValidityPeriodFormats.Enhanced:
return n, ErrNonRelative
default:
s.VPFormat = ValidityPeriodFormat(sms.ValidityPeriodFormat)
}
s.ReplyPathExists = sms.ReplyPath
s.UserDataStartsWithHeader = sms.UserDataHeaderIndicator
s.StatusReportRequest = sms.StatusReportRequest
s.Address.ReadFrom(sms.DestinationAddress[1:])
s.Encoding = Encoding(sms.DataCodingScheme)
if s.VPFormat != ValidityPeriodFormats.FieldNotPresent {
s.VP.ReadFrom(sms.ValidityPeriod)
}
switch s.Encoding {
case Encodings.Gsm7Bit:
s.Text, err = pdu.Decode7Bit(sms.UserData)
if err != nil {
return
}
s.Text = cutStr(s.Text, int(sms.UserDataLength))
case Encodings.UCS2:
s.Text, err = pdu.DecodeUcs2(sms.UserData)
if err != nil {
return
}
default:
return 0, ErrUnknownEncoding
}
default:
return n, ErrUnknownMessageType
}
return
}