Function resolveSourceUser

biko/biko.ts:182–224

(
  client: any,
  raw: string,
)

    const entity = await resolveEntityWithFallback(client, raw);
    if (!(entity instanceof Api.User)) {
      throw new Error("解析结果不是用户实体");
    }
    return {
      raw,
      display: buildEntityDisplay(entity, raw),
      manualMode: false,
      entity,
    };
  } catch (error) {
    const errorMessage = extractErrorMessage(error);
    if (errorMessage === "解析结果不是用户实体") {
      throw new Error(`源用户解析失败: ${raw}\n原因: 解析结果不是用户实体`);
    }

    if (/^-?\d+$/.test(raw)) {
      return {
        raw,
        display: raw,
        manualMode: true,
        manualUserId: normalizeId(raw),
      };
    }

    const username = normalizeUsername(raw);
    if (username) {
      return {
        raw,
        display: `@${username}`,
        manualMode: true,
        manualUsername: username,
      };
    }

    throw new Error(`源用户解析失败: ${raw}\n原因: ${errorMessage}`);
  }
}

function parseRequestedCount(raw: string): number {
  const value = parseInt(raw, 10);
  if (!Number.isFinite(value) || value <= 0) {
    throw new Error("最大消息数必须是大于 0 的整数");
  }
  return Math.min(value, MAX_MESSAGE_COUNT);
}

function buildChatMessageLink(