localStorage操作统一使用localStorageUtils完成

bookshelfplus-frontend/public/assets/javascripts/localStorageUtils.js

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+// 统一 localStorage 的读取与写入
+
+var localStorageUtils = {
+    // 检查浏览器 localStorage 是否支持
+    checkLocalStorage: function () {
+        try {
+            localStorage.setItem('test', 'test');
+            localStorage.removeItem('test');
+            return true;
+        } catch (e) {
+            alert("您的浏览器不支持localStorage，请更换浏览器！");
+            window.location.href = "/";
+            return false;
+        }
+    },
+
+    // 获取 localStorage
+    get: function (key) {
+        return localStorage.getItem(key);
+        // return JSON.parse(localStorage.getItem(key));
+    },
+    // 设置 localStorage
+    set: function (key, value) {
+        localStorage.setItem(key, value);
+        // localStorage.setItem(key, JSON.stringify(value));
+    },
+    // 删除 localStorage
+    remove: function (key) {
+        localStorage.removeItem(key);
+    },
+    // 清空 localStorage
+    clear: function () {
+        localStorage.clear();
+    },
+
+    // 用户登录
+    userLogin: function ({ token, is_admin }) {
+        this.set('token', token);
+        this.set('is_admin', is_admin);
+    },
+
+    // 用户退出登录
+    userLogout: function () {
+        this.remove('token');
+        this.remove('is_admin');
+    },
+
+    // 获取用户登录信息 (从浏览器本地缓存读取)
+    getUserLogin: function () {
+        return {
+            token: this.get('token'),
+            is_admin: this.get('is_admin')
+        }
+    },
+    getToken: function () {
+        return this.get('token');
+    },
+    getIsAdmin: function () {
+        return this.get('is_admin') === 'true';
+    },
+    getIsUser: function () {
+        return this.get('is_admin') === 'false';
+    },
+
+    getLoginStatus: function () {
+        return !!this.get('token') && !!this.get('is_admin');
+    },
+};