Function performLotteryDraw

lottery/lottery.ts:705–811

(client: TelegramClient, lottery: any)

      } catch (error) {
        console.warn("Failed to delete original lottery message:", error);
      }
    }

    const participants = getLotteryParticipants(lottery.id);
    
    if (participants.length === 0) {
      await client.sendMessage(lottery.chat_id, {
        message: `🎊 <b>开奖结果</b>\n\n🏆 <b>活动名称:</b> ${htmlEscape(lottery.title)}\n\n😅 <b>很遗憾，没有用户参与抽奖</b>\n🙏 感谢大家的关注!`,
        parseMode: "html",
      });
      
      // Mark lottery as completed
      const stmt = db.prepare(`UPDATE lottery_config SET status = 'completed' WHERE id = ?`);
      stmt.run(lottery.id);
      return;
    }

    const winnerCount = Math.min(lottery.winner_count, participants.length);
    const shuffled = [...participants];
    
    // Fisher-Yates shuffle
    for (let i = shuffled.length - 1; i > 0; i--) {
      const j = Math.floor(Math.random() * (i + 1));
      [shuffled[i], shuffled[j]] = [shuffled[j], shuffled[i]];
    }
    
    const winners = shuffled.slice(0, winnerCount);
    
    // Distribute prizes and create winner records
    await distributePrizes(client, lottery, winners);
    
    // Generate winner display list with status
    const winnerLines: string[] = [];
    const updatedWinners = getLotteryWinners(lottery.id);
    
    for (const winner of updatedWinners) {
      const statusIcon = getWinnerStatusIcon(winner.status);
      let displayName = "";
      let username = "";
      
      if (winner.first_name || winner.last_name) {
        displayName = [winner.first_name, winner.last_name].filter(Boolean).join(" ");
      }
      if (winner.username) {
        username = `@${winner.username}`;
      }
      
      let formattedName = "";
      if (displayName && username) {
        formattedName = `${htmlEscape(displayName)} ${htmlEscape(username)}`;
      } else if (displayName) {
        formattedName = htmlEscape(displayName);
      } else if (username) {
        formattedName = htmlEscape(username);
      } else {
        formattedName = `用户 ${winner.user_id}`;
      }