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run.go
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run.go
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package examples
import (
"context"
"flag"
"fmt"
"log"
"os"
"os/signal"
"syscall"
"github.com/mr-linch/go-tg"
"github.com/mr-linch/go-tg/tgb"
)
// Run runs bot with given router.
// Exit on error.
func Run(handler tgb.Handler, opts ...tg.ClientOption) {
ctx := context.Background()
ctx, cancel := signal.NotifyContext(ctx, os.Interrupt, os.Kill, syscall.SIGTERM)
defer cancel()
if err := run(ctx, handler, nil, opts...); err != nil {
log.Printf("error: %v", err)
defer os.Exit(1)
}
}
func run(
ctx context.Context,
handler tgb.Handler,
do func(ctx context.Context, client *tg.Client) error,
opts ...tg.ClientOption,
) error {
// define flags
var (
flagToken string
flagServer string
flagTestEnv bool
flagWebhookURL string
flagWebhookListen string
)
// parse flags
flag.StringVar(&flagToken, "token", "", "Telegram Bot API token")
flag.StringVar(&flagServer, "server", "https://api.telegram.org", "Telegram Bot API server")
flag.BoolVar(&flagTestEnv, "test-env", false, "switch bot to test environment")
flag.StringVar(&flagWebhookURL, "webhook-url", "", "Telegram Bot API webhook URL, if not provdide run in longpoll mode")
flag.StringVar(&flagWebhookListen, "webhook-listen", ":8000", "Telegram Bot API webhook URL")
flag.Parse()
if flagToken == "" {
return fmt.Errorf("token is required, provide it with -token flag")
}
opts = append(opts,
tg.WithClientServerURL(flagServer),
)
if flagTestEnv {
opts = append(opts, tg.WithClientTestEnv())
}
client := tg.New(flagToken, opts...)
me, err := client.Me(ctx)
if err != nil {
return fmt.Errorf("get me: %w", err)
}
log.Printf("authorized as %s", me.Username.Link())
if do != nil {
return do(ctx, client)
} else if flagWebhookURL != "" {
err = tgb.NewWebhook(
handler,
client,
flagWebhookURL,
tgb.WithDropPendingUpdates(true),
tgb.WithWebhookLogger(log.Default()),
).Run(
ctx,
flagWebhookListen,
)
} else {
err = tgb.NewPoller(
handler,
client,
tgb.WithPollerLogger(log.Default()),
tgb.WithPollerAllowedUpdates(
tg.UpdateTypeMessage,
tg.UpdateTypeEditedMessage,
tg.UpdateTypeChannelPost,
tg.UpdateTypeEditedChannelPost,
tg.UpdateTypeMessageReaction,
tg.UpdateTypeMessageReactionCount,
tg.UpdateTypeInlineQuery,
tg.UpdateTypeChosenInlineResult,
tg.UpdateTypeCallbackQuery,
tg.UpdateTypeShippingQuery,
tg.UpdateTypePreCheckoutQuery,
tg.UpdateTypePoll,
tg.UpdateTypePollAnswer,
tg.UpdateTypeMyChatMember,
tg.UpdateTypeChatMember,
tg.UpdateTypeChatJoinRequest,
tg.UpdateTypeChatBoost,
tg.UpdateTypeRemovedChatBoost,
),
).Run(ctx)
}
return err
}