// AutoCompleteFunction returns a callback for terminal autocompletion
func (h *Host) AutoCompleteFunction(u *message.User) func(line string, pos int, key rune) (newLine string, newPos int, ok bool) {
return func(line string, pos int, key rune) (newLine string, newPos int, ok bool) {
if key != 9 {
return
}
if line == "" || strings.HasSuffix(line[:pos], " ") {
// Don't autocomplete spaces.
return
}
fields := strings.Fields(line[:pos])
isFirst := len(fields) < 2
partial := fields[len(fields)-1]
posPartial := pos - len(partial)
var completed string
if isFirst && strings.HasPrefix(partial, "/") {
// Command
completed = h.completeCommand(partial)
if completed == "/reply" {
replyTo := u.ReplyTo()
if replyTo != nil {
completed = "/msg " + replyTo.Name()
}
}
} else {
// Name
completed = h.completeName(partial)
if completed == "" {
return
}
if isFirst {
completed += ":"
}
}
completed += " "
// Reposition the cursor
newLine = strings.Replace(line[posPartial:], partial, completed, 1)
newLine = line[:posPartial] + newLine
newPos = pos + (len(completed) - len(partial))
ok = true
return
}
}
