161 lines
3.1 KiB
Go
Raw Normal View History

2019-05-31 00:18:41 +01:00
package slack
import (
"errors"
"fmt"
"strings"
"sync"
"time"
"github.com/micro/go-micro/v3/agent/input"
2019-05-31 00:18:41 +01:00
"github.com/nlopes/slack"
)
// Satisfies the input.Conn interface
type slackConn struct {
auth *slack.AuthTestResponse
rtm *slack.RTM
exit chan bool
sync.Mutex
names map[string]string
}
func (s *slackConn) run() {
// func retrieves user names and maps to IDs
setNames := func() {
names := make(map[string]string)
users, err := s.rtm.Client.GetUsers()
if err != nil {
return
}
for _, user := range users {
names[user.ID] = user.Name
}
s.Lock()
s.names = names
s.Unlock()
}
setNames()
t := time.NewTicker(time.Minute)
defer t.Stop()
for {
select {
case <-s.exit:
return
case <-t.C:
setNames()
}
}
}
func (s *slackConn) getName(id string) string {
s.Lock()
name := s.names[id]
s.Unlock()
return name
}
func (s *slackConn) Close() error {
select {
case <-s.exit:
return nil
default:
close(s.exit)
}
return nil
}
func (s *slackConn) Recv(event *input.Event) error {
if event == nil {
return errors.New("event cannot be nil")
}
for {
select {
case <-s.exit:
return errors.New("connection closed")
case e := <-s.rtm.IncomingEvents:
switch ev := e.Data.(type) {
case *slack.MessageEvent:
// only accept type message
if ev.Type != "message" {
continue
}
// only accept DMs or messages to me
switch {
case strings.HasPrefix(ev.Channel, "D"):
case strings.HasPrefix(ev.Text, s.auth.User):
case strings.HasPrefix(ev.Text, fmt.Sprintf("<@%s>", s.auth.UserID)):
default:
continue
}
// Strip username from text
switch {
case strings.HasPrefix(ev.Text, s.auth.User):
args := strings.Split(ev.Text, " ")[1:]
ev.Text = strings.Join(args, " ")
event.To = s.auth.User
case strings.HasPrefix(ev.Text, fmt.Sprintf("<@%s>", s.auth.UserID)):
args := strings.Split(ev.Text, " ")[1:]
ev.Text = strings.Join(args, " ")
event.To = s.auth.UserID
}
if event.Meta == nil {
event.Meta = make(map[string]interface{})
}
// fill in the blanks
event.From = ev.Channel + ":" + ev.User
event.Type = input.TextEvent
event.Data = []byte(ev.Text)
event.Meta["reply"] = ev
return nil
case *slack.InvalidAuthEvent:
return errors.New("invalid credentials")
}
}
}
}
func (s *slackConn) Send(event *input.Event) error {
var channel, message, name string
if len(event.To) == 0 {
return errors.New("require Event.To")
}
parts := strings.Split(event.To, ":")
if len(parts) == 2 {
channel = parts[0]
name = s.getName(parts[1])
// try using reply meta
} else if ev, ok := event.Meta["reply"]; ok {
channel = ev.(*slack.MessageEvent).Channel
name = s.getName(ev.(*slack.MessageEvent).User)
}
// don't know where to send the message
if len(channel) == 0 {
return errors.New("could not determine who message is to")
}
if len(name) == 0 || strings.HasPrefix(channel, "D") {
message = string(event.Data)
} else {
message = fmt.Sprintf("@%s: %s", name, string(event.Data))
}
s.rtm.SendMessage(s.rtm.NewOutgoingMessage(message, channel))
return nil
}