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api/utils/account_utils.js

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+/**
+ * 账号工具函数
+ * 提供账号相关的工具方法
+ */
+
+const dayjs = require('dayjs');
+const utc = require('dayjs/plugin/utc');
+const timezone = require('dayjs/plugin/timezone');
+
+// 启用 UTC 和时区插件
+dayjs.extend(utc);
+dayjs.extend(timezone);
+
+/**
+ * 计算剩余天数（使用 UTC 时间避免时区问题）
+ * @param {Date|string|null} authorizationDate - 授权日期
+ * @param {number} authorizationDays - 授权天数
+ * @returns {number} 剩余天数
+ */
+function calculateRemainingDays(authorizationDate, authorizationDays) {
+  if (!authorizationDate || !authorizationDays || authorizationDays <= 0) {
+    return 0;
+  }
+
+  // 使用 UTC 时间计算，避免时区问题
+  const startDate = dayjs(authorizationDate).utc().startOf('day');
+  const endDate = startDate.add(authorizationDays, 'day');
+  const now = dayjs().utc().startOf('day');
+
+  // 计算剩余天数
+  const remaining = endDate.diff(now, 'day', false); // 使用整数天数
+  return Math.max(0, remaining);
+}
+
+/**
+ * 检查授权是否有效
+ * @param {Date|string|null} authorizationDate - 授权日期
+ * @param {number} authorizationDays - 授权天数
+ * @returns {boolean} 授权是否有效
+ */
+function isAuthorizationValid(authorizationDate, authorizationDays) {
+  const remainingDays = calculateRemainingDays(authorizationDate, authorizationDays);
+  return remainingDays > 0;
+}
+
+/**
+ * 为账号对象添加 remaining_days 字段
+ * @param {Object} account - 账号对象（可以是 Sequelize 实例或普通对象）
+ * @returns {Object} 添加了 remaining_days 的账号对象
+ */
+function addRemainingDays(account) {
+  // 如果是 Sequelize 实例，转换为普通对象
+  const accountData = account.toJSON ? account.toJSON() : account;
+  
+  const authDate = accountData.authorization_date;
+  const authDays = accountData.authorization_days || 0;
+  
+  accountData.remaining_days = calculateRemainingDays(authDate, authDays);
+  
+  return accountData;
+}
+
+/**
+ * 为账号数组添加 remaining_days 字段
+ * @param {Array} accounts - 账号数组
+ * @returns {Array} 添加了 remaining_days 的账号数组
+ */
+function addRemainingDaysToAccounts(accounts) {
+  if (!Array.isArray(accounts)) {
+    return accounts;
+  }
+  
+  return accounts.map(account => addRemainingDays(account));
+}
+
+module.exports = {
+  calculateRemainingDays,
+  isAuthorizationValid,
+  addRemainingDays,
+  addRemainingDaysToAccounts
+};
+