import { constantRouterMap, asyncRouterMap } from "src/router";

/**
 * 通过meta.role判断是否与当前用户权限匹配
 * @param role
 * @param route
 */
const hasPermission = (roles, route) => {
  if (route.meta && route.meta.role) {
    return roles.some((role) => route.meta.role.indexOf(role) >= 0);
  } else {
    return true;
  }
};

/**
 * 递归过滤异步路由表，返回符合用户角色权限的路由表
 * @param asyncRouterMap
 * @param role
 */
const filterAsyncRouter = (asyncRouterMap, roles) => {
  const accessedRouters = asyncRouterMap.filter((route) => {
    if (hasPermission(roles, route)) {
      if (route.children && route.children.length) {
        route.children = filterAsyncRouter(route.children, roles);
      }
      return true;
    }
    return false;
  });
  return accessedRouters;
};

const permission = {
  state: {
    routes: constantRouterMap.concat(asyncRouterMap),
    addRouters: [],
  },
  mutations: {
    SETROUTES(state, routers) {
      state.addRouters = routers;
      state.routes = constantRouterMap.concat(routers);
    },
  },
  actions: {
    setRoutes({ commit }, info) {
      return new Promise((resolve, reject) => {
        let { roles } = info;
        let accessedRouters = [];
        if (roles.indexOf("admin") >= 0) {
          accessedRouters = asyncRouterMap;
        } else {
          accessedRouters = filterAsyncRouter(asyncRouterMap, roles);
        }

        commit("SETROUTES", accessedRouters);
        resolve();
      });
    },
  },
};
export default permission;