Function sendCaptcha

pmcaptcha/pmcaptcha.ts:872–1026

(client: TelegramClient, userId: number)

    const dividend = divisor * quotient;
    return { question: `${dividend} ÷ ${divisor}`, answer: String(quotient) };
  }
  if (type === 4) {
    const a = rand(2, 9), b = rand(2, 9), c = rand(1, 20);
    return { question: `${a} × ${b} + ${c}`, answer: String(a * b + c) };
  }
  const a = rand(2, 12);
  return { question: `${a}²`, answer: String(a * a) };
}

const TEXT_QA: { question: string; answer: string }[] = [
  { question: "天空是什么颜色？（中文）",           answer: "蓝色"   },
  { question: "一周有几天？（数字）",               answer: "7"      },
  { question: "一年有几个月？（数字）",             answer: "12"     },
  { question: "猫叫声是？（中文拟声词）",           answer: "喵"     },
  { question: "水的化学式是？",                    answer: "h2o"    },
  { question: "太阳从哪边升起？（东/西/南/北）",    answer: "东"     },
  { question: "地球上最大的洋是？（中文）",         answer: "太平洋" },
  { question: "1 + 1 等于几？（数字）",            answer: "2"      },
  { question: "中国的首都是哪个城市？（中文）",     answer: "北京"   },
  { question: "一天有多少小时？（数字）",           answer: "24"     },
  { question: "人有几根手指？（数字）",             answer: "10"     },
  { question: "苹果是什么颜色的？（中文，常见色）", answer: "红色"   },
  { question: "冰是什么状态的水？（固/液/气）",     answer: "固"     },
  { question: "地球围绕什么转？（中文）",           answer: "太阳"   },
  { question: "键盘上字母共有几个？（数字）",       answer: "26"     },
];

function textQuestion(): { question: string; answer: string } {
  return TEXT_QA[Math.floor(Math.random() * TEXT_QA.length)];
}

async function sendCaptcha(client: TelegramClient, userId: number): Promise<void> {
  const lifecycle = getActiveLifecycle();
  if (!lifecycle) return;

  const existing = removeCaptchaState(userId);
  if (existing) {
    await cleanupCaptchaMessages(client, userId, existing);
  }

  const mode    = cfg.mode();
  const timeout = cfg.timeout();
  const tries   = cfg.maxTries();
  const actions = cfg.failActions();
  const custom  = cfg.prompt();

  const actionDesc = actions.length
    ? actions.map(a => FAIL_ACTION_LABEL[a] ?? a).join("、")
    : "仅归档并静音";

  function buildFooter(): string {
    const lines: string[] = [];
    if (timeout > 0) lines.push(`⏱ 验证时间：<b>${htmlEscape(timeout)}</b> 秒`);
    if (tries   > 0) lines.push(`🔢 剩余次数：<b>${htmlEscape(tries)}</b> 次`);
    lines.push(`⚠️ 验证失败将会：${htmlEscape(actionDesc)}`);
    return lines.length ? "\n\n" + lines.join("\n") : "";
  }