Function handleReply

pmcaptcha/pmcaptcha.ts:1044–1109

(client: TelegramClient, userId: number, input: string, incomingMsgId: number)

          } catch {}
          if (!isStateCurrent(state)) return;
          await runFailActions(client, userId);
        }, { label: `pmcaptcha-timeout:${userId}` }).catch((error) => {
          log(LogLevel.ERROR, `Captcha timeout task failed: ${userId}`, error);
        });
      }, timeout * 1000, { label: `pmcaptcha-timer:${userId}` });
    }

    states.set(userId, state);
    log(LogLevel.INFO, `Captcha sent (${mode}, timeout=${timeout}s) → user ${userId}`);

  } catch (e) {
    log(LogLevel.ERROR, `Failed to send captcha to ${userId}`, e);
  }
}

// ─── 处理验证回复 ─────────────────────────────────────────────────────────────

function levenshtein(a: string, b: string): number {
  const m = a.length, n = b.length;
  const dp: number[][] = Array.from({ length: m + 1 }, (_, i) => [i, ...new Array(n).fill(0)]);
  for (let j = 0; j <= n; j++) dp[0][j] = j;
  for (let i = 1; i <= m; i++) {
    for (let j = 1; j <= n; j++) {
      dp[i][j] = a[i - 1] === b[j - 1]
        ? dp[i - 1][j - 1]
        : 1 + Math.min(dp[i - 1][j], dp[i][j - 1], dp[i - 1][j - 1]);
    }
  }
  return dp[m][n];
}

async function handleReply(client: TelegramClient, userId: number, input: string, incomingMsgId: number): Promise<void> {
  const state = states.get(userId);
  if (!state || !isStateCurrent(state)) return;

  if (!input.trim()) return;

  if (incomingMsgId) state.msgIds.push(incomingMsgId);

  if (!state.answer) {
    log(LogLevel.WARN, `handleReply: empty answer for user ${userId}`);
    removeCaptchaState(userId);
    await cleanupCaptchaMessages(client, userId, state);
    try { await client.sendMessage(peerTarget(userId), { message: "❌ 验证状态异常，请联系对方重置。", parseMode: "html" }); } catch {}
    return;
  }

  const isImgMode  = state.mode === CaptchaMode.IMG_DIGIT || state.mode === CaptchaMode.IMG_MIXED;
  const inputNorm  = input.trim().toUpperCase();
  const answerNorm = state.answer.trim().toUpperCase();

  const correct = isImgMode
    ? levenshtein(inputNorm, answerNorm) <= 1
    : inputNorm === answerNorm;

  if (correct) {
    removeCaptchaState(userId);
    await cleanupCaptchaMessages(client, userId, state);