161 lines
3.1 KiB
Go
161 lines
3.1 KiB
Go
package slack
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import (
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"errors"
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"fmt"
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"strings"
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"sync"
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"time"
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"github.com/micro/go-micro/v2/agent/input"
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"github.com/nlopes/slack"
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)
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// Satisfies the input.Conn interface
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type slackConn struct {
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auth *slack.AuthTestResponse
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rtm *slack.RTM
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exit chan bool
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sync.Mutex
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names map[string]string
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}
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func (s *slackConn) run() {
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// func retrieves user names and maps to IDs
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setNames := func() {
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names := make(map[string]string)
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users, err := s.rtm.Client.GetUsers()
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if err != nil {
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return
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}
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for _, user := range users {
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names[user.ID] = user.Name
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}
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s.Lock()
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s.names = names
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s.Unlock()
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}
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setNames()
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t := time.NewTicker(time.Minute)
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defer t.Stop()
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for {
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select {
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case <-s.exit:
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return
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case <-t.C:
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setNames()
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}
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}
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}
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func (s *slackConn) getName(id string) string {
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s.Lock()
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name := s.names[id]
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s.Unlock()
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return name
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}
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func (s *slackConn) Close() error {
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select {
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case <-s.exit:
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return nil
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default:
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close(s.exit)
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}
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return nil
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}
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func (s *slackConn) Recv(event *input.Event) error {
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if event == nil {
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return errors.New("event cannot be nil")
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}
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for {
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select {
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case <-s.exit:
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return errors.New("connection closed")
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case e := <-s.rtm.IncomingEvents:
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switch ev := e.Data.(type) {
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case *slack.MessageEvent:
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// only accept type message
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if ev.Type != "message" {
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continue
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}
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// only accept DMs or messages to me
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switch {
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case strings.HasPrefix(ev.Channel, "D"):
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case strings.HasPrefix(ev.Text, s.auth.User):
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case strings.HasPrefix(ev.Text, fmt.Sprintf("<@%s>", s.auth.UserID)):
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default:
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continue
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}
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// Strip username from text
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switch {
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case strings.HasPrefix(ev.Text, s.auth.User):
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args := strings.Split(ev.Text, " ")[1:]
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ev.Text = strings.Join(args, " ")
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event.To = s.auth.User
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case strings.HasPrefix(ev.Text, fmt.Sprintf("<@%s>", s.auth.UserID)):
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args := strings.Split(ev.Text, " ")[1:]
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ev.Text = strings.Join(args, " ")
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event.To = s.auth.UserID
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}
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if event.Meta == nil {
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event.Meta = make(map[string]interface{})
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}
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// fill in the blanks
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event.From = ev.Channel + ":" + ev.User
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event.Type = input.TextEvent
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event.Data = []byte(ev.Text)
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event.Meta["reply"] = ev
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return nil
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case *slack.InvalidAuthEvent:
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return errors.New("invalid credentials")
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}
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}
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}
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}
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func (s *slackConn) Send(event *input.Event) error {
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var channel, message, name string
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if len(event.To) == 0 {
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return errors.New("require Event.To")
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}
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parts := strings.Split(event.To, ":")
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if len(parts) == 2 {
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channel = parts[0]
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name = s.getName(parts[1])
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// try using reply meta
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} else if ev, ok := event.Meta["reply"]; ok {
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channel = ev.(*slack.MessageEvent).Channel
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name = s.getName(ev.(*slack.MessageEvent).User)
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}
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// don't know where to send the message
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if len(channel) == 0 {
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return errors.New("could not determine who message is to")
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}
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if len(name) == 0 || strings.HasPrefix(channel, "D") {
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message = string(event.Data)
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} else {
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message = fmt.Sprintf("@%s: %s", name, string(event.Data))
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}
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s.rtm.SendMessage(s.rtm.NewOutgoingMessage(message, channel))
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return nil
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}
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