68 lines
1.5 KiB
Go
68 lines
1.5 KiB
Go
package telegram
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import (
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"log/slog"
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tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
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)
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const (
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TextLengthLimit = 4000
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)
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type TelegramMessageSender struct {
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bot *tgbotapi.BotAPI
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logger *slog.Logger
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}
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func NewTelegramMessageSender(botToken string, logger *slog.Logger) (*TelegramMessageSender, error) {
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bot, err := tgbotapi.NewBotAPI(botToken)
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if err != nil {
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return nil, err
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}
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return &TelegramMessageSender{
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bot: bot,
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logger: logger,
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}, nil
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}
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func (s *TelegramMessageSender) Send(text string, chatId int64, replyToMessageId *int) error {
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// If message is short enough, send it directly
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if len([]rune(text)) <= TextLengthLimit {
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return s.sendSingleMessage(text, chatId, replyToMessageId)
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}
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// Split long message into parts
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parts := s.splitMessageByWords(text, TextLengthLimit)
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// Send each part
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for i, part := range parts {
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var replyId *int
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// Only use replyToMessageId for the first part
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if i == 0 {
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replyId = replyToMessageId
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}
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err := s.sendSingleMessage(part, chatId, replyId)
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if err != nil {
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return err
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}
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}
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return nil
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}
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// sendSingleMessage sends a single message
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func (s *TelegramMessageSender) sendSingleMessage(text string, chatId int64, replyToMessageId *int) error {
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resultMsg := tgbotapi.NewMessage(chatId, text)
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if replyToMessageId != nil {
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resultMsg.ReplyToMessageID = *replyToMessageId
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}
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_, err := s.bot.Send(resultMsg)
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if err != nil {
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s.logger.Error("Failed to send message to tg bot", "error", err)
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return err
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}
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return nil
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}
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