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main.go
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main.go
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package main
import (
"context"
"fmt"
"github.com/Av1shay/chatgpt-slack-bot/gpt"
"github.com/joho/godotenv"
"github.com/slack-go/slack"
"github.com/slack-go/slack/slackevents"
"github.com/slack-go/slack/socketmode"
"log"
"os"
"regexp"
"strconv"
)
const (
defaultMaxTokens = 100
defaultDebug = true
)
var slackMentionReg *regexp.Regexp
func init() {
slackMentionReg = regexp.MustCompile("(?:\\s)<@[^, ]*|(?:^)<@[^, ]*")
}
type ChatEngine interface {
Do(ctx context.Context, prompt string) (string, error)
}
func main() {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
if err := godotenv.Load(".env"); err != nil {
log.Fatal("failed to load .env file:", err)
}
openAiToken, found := os.LookupEnv("OPENAI_API_KEY")
if !found {
log.Fatal("OPENAI_API_KEY env is missing from config")
}
slackAuthToken, found := os.LookupEnv("SLACK_AUTH_TOKEN")
if !found {
log.Fatal("SLACK_AUTH_TOKEN env is missing from config")
}
slackAppToken, found := os.LookupEnv("SLACK_APP_TOKEN")
if !found {
log.Fatal("SLACK_APP_TOKEN env is missing from config")
}
debug, err := strconv.ParseBool(os.Getenv("DEBUG"))
if err != nil {
debug = defaultDebug
}
maxTokens, err := strconv.Atoi(os.Getenv("CHAT_GPT_MAX_TOKENS"))
if err != nil {
maxTokens = defaultMaxTokens
}
gptService := gpt.NewService(openAiToken, gpt.WithMaxTokens(maxTokens))
slackClient := slack.New(slackAuthToken, slack.OptionDebug(debug), slack.OptionAppLevelToken(slackAppToken))
socketClient := socketmode.New(slackClient,
socketmode.OptionDebug(debug),
socketmode.OptionLog(log.New(os.Stdout, "socketmode: ", log.Lshortfile|log.LstdFlags)))
go consumeMessages(ctx, slackClient, socketClient, gptService)
panic(socketClient.Run())
}
func consumeMessages(ctx context.Context, slackClient *slack.Client, socketClient *socketmode.Client, chatEngine ChatEngine) {
for {
select {
case <-ctx.Done():
log.Println("Shutting down socketmode listener")
return
case event := <-socketClient.Events:
switch event.Type {
case socketmode.EventTypeEventsAPI:
socketClient.Ack(*event.Request)
eventPayload, _ := event.Data.(slackevents.EventsAPIEvent)
if err := handleEventMessage(ctx, slackClient, chatEngine, eventPayload); err != nil {
log.Println("HandleEventMessage error", err)
}
}
}
}
}
func handleEventMessage(ctx context.Context, slackClient *slack.Client, chatEngine ChatEngine, eventPayload slackevents.EventsAPIEvent) error {
switch eventPayload.Type {
case slackevents.CallbackEvent:
innerEvent := eventPayload.InnerEvent
switch event := innerEvent.Data.(type) {
case *slackevents.AppMentionEvent:
prompt := slackMentionReg.ReplaceAllString(event.Text, "")
resp, err := chatEngine.Do(ctx, prompt)
if err != nil {
return fmt.Errorf("failed to get message from chat engine: %w", err)
}
attachment := slack.Attachment{}
attachment.Text = resp
attachment.Color = "#4af030"
_, _, err = slackClient.PostMessage(event.Channel, slack.MsgOptionAttachments(attachment))
if err != nil {
return fmt.Errorf("failed to post message: %w", err)
}
default:
return fmt.Errorf("unsupported inner event type %T", event)
}
default:
return fmt.Errorf("unsupported event type %q", eventPayload.Type)
}
return nil
}