// SendGroupAttachment sends an attachment to a given group.
func SendGroupAttachment(hexid string, msg string, r io.Reader) (uint64, error) {
ct, r := magic.MIMETypeFromReader(r)
a, err := uploadAttachment(r, ct)
if err != nil {
return 0, err
}
return sendGroupHelper(hexid, msg, a)
}
// contentType gets the content type (message, picture, video) of an attachment by sniffing its MIME type
func contentType(att io.Reader, mt string) int {
if att == nil {
return ContentTypeMessage
}
if mt == "" {
mt, _ = magic.MIMETypeFromReader(att)
}
return mimeTypeToContentType(mt)
}
// SendAttachment sends the contents of a reader, along
// with an optional message to a given contact.
func SendAttachment(tel, msg string, r io.Reader) (uint64, error) {
ct, r := magic.MIMETypeFromReader(r)
a, err := uploadAttachment(r, ct)
if err != nil {
return 0, err
}
omsg := &outgoingMessage{
tel: tel,
msg: msg,
attachment: a,
}
return sendMessage(omsg)
}