/
main.go
170 lines (149 loc) · 4.54 KB
/
main.go
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package main
import (
"bytes"
"flag"
"fmt"
"log"
"os"
"regexp"
"strings"
"time"
"github.com/nlopes/slack"
)
var (
prefix = flag.String("prefix", "cbot", "bot prefix") // prefix for direct commands
token = flag.String("token", "", "rest token") // Flowdock rest token
flows = flag.String("flows", "", "flows, separted by comma") // of form cabify/test,cabify/other
commandsDir = flag.String("c", "commands", "commands directory") // directory of the executable commands
)
func main() {
flag.Parse()
if *token == "" || *flows == "" {
flag.PrintDefaults()
return
}
c := slack.New(*token)
rooms := strings.Split(*flows, ",")
responders, err := InitMessageResponders(*commandsDir)
if err != nil {
log.Fatal(err)
}
for _, responder := range responders {
log.Printf("Registered <%s> responder", responder.Name)
}
startStream(c, rooms, responders)
}
// handleMessage receives an event and passes it to the MessageResponders
func handleMessage(c *slack.Slack, e *slack.MessageEvent, responders []*MessageResponder) {
if e.Username == "cbot" {
return
}
content, args, err := parseMessageContent(e)
if err != nil {
log.Printf("Error parsing message: %v", err)
return
}
if len(content) == 0 {
return
}
// determine if this is a direct message (prefixed with bots name)
direct := len(args) > 0 && args[0] == *prefix
// handle 'help' command
if direct && (len(args) == 1 || (len(args) > 1 && args[1] == "help")) {
helpTxt := bytes.NewBufferString("I understand:\n")
for _, r := range responders {
if r.Name[0] == '_' {
continue
}
helpTxt.WriteString(fmt.Sprintf(" %s %s\n", *prefix, r.Name))
}
params := slack.PostMessageParameters{Username: *prefix}
if _, _, err := c.PostMessage(e.Channel, helpTxt.String(), params); err != nil {
log.Println(err)
}
return
}
directHandled := !direct
user, err := c.GetUserInfo(e.Msg.User)
os.Setenv("CURRENT_FLOW", e.Channel)
os.Setenv("CURRENT_USER_AVATAR", user.Profile.ImageOriginal)
os.Setenv("CURRENT_USER_EMAIL", user.Profile.Email)
os.Setenv("CURRENT_USER_NICK", user.Name)
os.Setenv("CURRENT_USER_NAME", user.Profile.RealName)
os.Setenv("CURRENT_USER_ID", string(user.ID))
for _, responder := range responders {
caught, err := responder.Handle(direct, content, args[1:], func(response string) error {
// handle the output of the command by replying to the message
params := slack.PostMessageParameters{Username: *prefix}
_, _, error := c.PostMessage(e.Channel, response, params)
return error
})
if err != nil {
log.Println(err)
continue
}
if caught && direct {
directHandled = true
}
}
// handle case when a direct message wasn't handled
if !directHandled {
log.Printf("Unhandled direct message: %s", content)
resp := "Sorry, didn't recognize that command. Try 'cbot help'"
params := slack.PostMessageParameters{Username: *prefix}
if _, _, err := c.PostMessage(e.Channel, resp, params); err != nil {
log.Println(err)
}
}
}
var spaceSplitter *regexp.Regexp = regexp.MustCompile("\\s+")
// parseMessageContent cleans a message's content and breaks into args
func parseMessageContent(e *slack.MessageEvent) (string, []string, error) {
content := e.Msg.Text
cleaned := strings.TrimSpace(content)
args := spaceSplitter.Split(cleaned, -1)
return content, args, nil
}
func startStream(c *slack.Slack, flows []string, responders []*MessageResponder) {
chSender := make(chan slack.OutgoingMessage)
chReceiver := make(chan slack.SlackEvent)
wsAPI, err := c.StartRTM("", "https://slack.com/api")
if err != nil {
fmt.Errorf("%s\n", err)
}
go wsAPI.HandleIncomingEvents(chReceiver)
go wsAPI.Keepalive(20 * time.Second)
go func(wsAPI *slack.WS, chSender chan slack.OutgoingMessage) {
for {
select {
case msg := <-chSender:
wsAPI.SendMessage(&msg)
}
}
}(wsAPI, chSender)
for {
select {
case msg := <-chReceiver:
fmt.Print("Event Received: ")
switch msg.Data.(type) {
case slack.HelloEvent:
// Ignore hello
case *slack.MessageEvent:
a := msg.Data.(*slack.MessageEvent)
handleMessage(c, a, responders)
fmt.Printf("Message: %v\n", a)
case *slack.PresenceChangeEvent:
a := msg.Data.(*slack.PresenceChangeEvent)
fmt.Printf("Presence Change: %v\n", a)
case slack.LatencyReport:
a := msg.Data.(slack.LatencyReport)
fmt.Printf("Current latency: %v\n", a.Value)
case *slack.WSError:
error := msg.Data.(*slack.WSError)
fmt.Printf("Error: %d - %s\n", error.Code, error.Msg)
default:
fmt.Printf("Unexpected: %v\n", msg.Data)
}
}
}
}