feat: add dig command

Other changes:
- use middleware for permission checking
- able to respond with emoji
- log incoming requests

bot.go

@@ -2,17 +2,25 @@ package main
 
 import (
 	"fmt"
+	"html"
 	"math"
 	"strings"
+	"text/tabwriter"
 	"time"
 
 	"github.com/go-errors/errors"
 	"github.com/samber/lo"
 	tele "gopkg.in/telebot.v3"
 
+	"git.gensokyo.cafe/kkyy/tgbot_misaka_5882f7/cmds"
 	"git.gensokyo.cafe/kkyy/tgbot_misaka_5882f7/stats"
 )
 
+const (
+	stickerPanic   = "CAACAgUAAxkBAAMjY3zoraxZGB8Xejyw86bHLSWLjVcAArMIAAL7-nhXNK7dStmRUGsrBA"
+	stickerLoading = "CAACAgUAAxkBAAMmY3zp5UCMVRvy1isFCPHrx-UBWX8AApYHAALP8GhXEm9ZIBjn1v8rBA"
+)
+
 func isFromAdmin(sender *tele.User) bool {
 	if sender == nil {
 		return false
@@ -33,17 +41,49 @@ func initBot() (*tele.Bot, error) {
 		return nil, errors.Wrap(err, 0)
 	}
 
+	b.Use(logMiddleware)
+
 	// command routing
 	b.Handle("/start", handleStartCmd)
-	b.Handle("/traffic", handleTrafficCmd)
 
 	b.Handle("/me", handleUserInfoCmd)
 	b.Handle("/chat", handleChatInfoCmd)
 	b.Handle("/year_progress", handleYearProgressCmd)
 
+	b.Handle(tele.OnText, handleGeneralMessage)
+	b.Handle(tele.OnSticker, handleGeneralMessage)
+
+	// admin required
+	adminGrp := b.Group()
+	adminGrp.Use(adminMiddleware)
+	adminGrp.Handle("/traffic", handleTrafficCmd)
+	adminGrp.Handle("/dig", handleDigCmd)
+
+	// adminGrp.Handle("/test", handleTestCmd)
+
 	return b, nil
 }
 
+func adminMiddleware(next tele.HandlerFunc) tele.HandlerFunc {
+	return func(c tele.Context) error {
+		if !isFromAdmin(c.Sender()) {
+			return nil
+		}
+		return next(c)
+	}
+}
+
+func logMiddleware(next tele.HandlerFunc) tele.HandlerFunc {
+	return func(c tele.Context) error {
+		upd := c.Update()
+		defer func() {
+			logger.Infow("Log middleware", "update", upd)
+		}()
+
+		return next(c)
+	}
+}
+
 func handleStartCmd(c tele.Context) error {
 	if !isFromAdmin(c.Sender()) {
 		return c.Send("Hello, stranger :)")
@@ -53,18 +93,14 @@ func handleStartCmd(c tele.Context) error {
 }
 
 func handleTrafficCmd(c tele.Context) error {
-	if !isFromAdmin(c.Sender()) {
-		return nil
-	}
-
 	dailyTraffic, err := stats.VnstatDailyTraffic(config.WatchedInterface)
 	if err != nil {
-		_ = c.Reply("im die, thank you forever")
+		_ = c.Reply(stickerFromID(stickerPanic))
 		return err
 	}
 	monthlyTraffic, err := stats.VnstatMonthlyTraffic(config.WatchedInterface)
 	if err != nil {
-		_ = c.Reply("im die, thank you forever")
+		_ = c.Reply(stickerFromID(stickerPanic))
 		return err
 	}
 
@@ -200,3 +236,55 @@ func handleYearProgressCmd(c tele.Context) error {
 	)
 	return c.Reply(replyText, &tele.SendOptions{ParseMode: tele.ModeHTML})
 }
+
+func handleGeneralMessage(_ tele.Context) error {
+	// Do nothing for now
+	return nil
+}
+
+func stickerFromID(id string) *tele.Sticker {
+	return &tele.Sticker{
+		File: tele.File{
+			FileID: id,
+		},
+	}
+}
+
+func handleDigCmd(c tele.Context) error {
+	msg := c.Message()
+	if msg == nil {
+		return nil
+	}
+
+	req, err := cmds.NewDigRequest(msg.Payload)
+	if err != nil {
+		return c.Reply("Invalid arguments.\nUsage: `/dig <name> [type]`", &tele.SendOptions{ParseMode: tele.ModeMarkdown})
+	}
+
+	resp, err := cmds.Dig(req)
+	if err != nil {
+		_ = c.Reply(stickerFromID(stickerPanic))
+		return err
+	}
+
+	replyBuf := &strings.Builder{}
+	tw := tabwriter.NewWriter(replyBuf, 0, 0, 2, ' ', 0)
+	// Write header
+	if len(resp.Records) > 0 {
+		_, _ = tw.Write([]byte("Name\tTTL\tType\tData\n"))
+	}
+	// Write data
+	for _, r := range resp.Records {
+		_, _ = fmt.Fprintf(tw, "%s\t%d\t%s\t%s\n", r.Name, r.TTL, r.Type, r.Data)
+	}
+	_ = tw.Flush()
+
+	replyText := []string{
+		fmt.Sprintf("<i>Status: <b>%s</b></i>\n", resp.Status),
+		fmt.Sprintf("<i>Query Time: <b>%s</b></i>\n\n", resp.QueryTime),
+		"<pre>",
+		html.EscapeString(replyBuf.String()),
+		"</pre>",
+	}
+	return c.Reply(strings.Join(replyText, ""), &tele.SendOptions{ParseMode: tele.ModeHTML})
+}