界面语言切换功能，修复nav异常

hydro/model/builtin.js

@@ -203,11 +203,10 @@ const CATEGORIES = {
 };
 const FOOTER_EXTRA_HTMLS = [];
 const VIEW_LANGS = [
-    { code: 'zh-CN', name: 'zh-CN' },
+    { code: 'zh_CN', name: '简体中文' },
+    { code: 'zh_TW', name: '正體中文' },
+    { code: 'en', name: 'English' },
 ];
-const LANGS = {
-    cc: 'cpp',
-};
 const LANG_TEXTS = {
     c: 'C',
     cc: 'C++',
@@ -296,7 +295,6 @@ global.Hydro.model.builtin = module.exports = {
     CATEGORIES,
     VIEW_LANGS,
     FOOTER_EXTRA_HTMLS,
-    LANGS,
     LANG_TEXTS,
     LANG_HIGHLIGHT_ID,
     STATUS,

hydro/model/user.js

@@ -19,7 +19,7 @@ class USER {
         this.salt = () => udoc.salt;
         this.hash = () => udoc.hash;
         this.priv = udoc.priv;
-        this.viewLang = udoc.language || 'zh_CN';
+        this.viewLang = udoc.viewLang || 'zh_CN';
         this.codeLang = udoc.codeLang || 'c';
         this.codeTemplate = udoc.codeTemplate || '';
         this.regat = udoc.regat;
@@ -55,9 +55,12 @@ async function getInDomain(domainId, udoc) {
     return dudoc;
 }
 
-async function getById(domainId, _id) {
+async function getById(domainId, _id, throwError = false) {
     const udoc = await coll.findOne({ _id });
-    if (!udoc) throw new UserNotFoundError(_id);
+    if (!udoc) {
+        if (throwError) throw new UserNotFoundError(_id);
+        else return null;
+    }
     const dudoc = await getInDomain(domainId, udoc);
     return new USER(udoc, dudoc);
 }
@@ -224,6 +227,10 @@ function ban(uid) {
     ]);
 }
 
+function setSuperAdmin(uid) {
+    return setById(uid, { priv: 1 });
+}
+
 function ensureIndexes() {
     return Promise.all([
         coll.createIndex('unameLower', { unique: true }),
@@ -255,6 +262,7 @@ global.Hydro.model.user = module.exports = {
     getInDomain,
     addRole,
     deleteRoles,
+    setSuperAdmin,
     ban,
     ensureIndexes,
 };