权限系统设计

authority.js

const NO          = 0b00000; // 初始没权限
const SYS_SETTING = 0b00010; // 系统重要设置权限
const USER_MANG   = 0b00100; // 用户管理权限
const DATA_ADMIN  = 0b01000; // 数据库管理权限
const POST_EDIT   = 0b00001; // 文章编辑操作权限
const POST_VIEW   = 0b10000; // 文章查看权

const user = {
  name: "老王",
  authority: NO,
};

function setAuthority(user, authoritys) {
  authoritys.forEach((authority) => {
    user.authority |= authority;
  });
}

function checkAuthority(user, authority) {
  return user.authority & authority;
}

setAuthority(user, [SYS_SETTING, USER_MANG, DATA_ADMIN]);

if (checkAuthority(user, SYS_SETTING)) {
  console.log(`${user.name}有系统重要设置权限`);
}
if (checkAuthority(user, USER_MANG)) {
  console.log(`${user.name}有用户管理权限`);
}
if (checkAuthority(user, DATA_ADMIN)) {
  console.log(`${user.name}有数据库管理权限`);
}
if (checkAuthority(user, POST_EDIT)) {
  console.log(`${user.name}有文章编辑操作权限`);
}
if (checkAuthority(user, POST_VIEW)) {
  console.log(`${user.name}有文章查看权`);
}

/**
 * 结果
 * 老王有系统重要设置权限
  老王有用户管理权限
  老王有数据库管理权限
 */