Disallow normal users setting the problem id

modules/problem.js

@@ -288,11 +288,13 @@ app.post('/problem/:id/edit', async (req, res) => {
 
       problem = await Problem.create();
 
+      if (await res.locals.user.hasPrivilege('manage_problem')) {
         let customID = parseInt(req.body.id);
         if (customID) {
           if (await Problem.fromID(customID)) throw new ErrorMessage('ID 已被使用。');
           problem.id = customID;
         } else if (id) problem.id = id;
+      }
 
       problem.user_id = res.locals.user.id;
       problem.publicizer_id = res.locals.user.id;
@@ -357,6 +359,8 @@ app.get('/problem/:id/import', async (req, res) => {
       if (!await problem.isAllowedEditBy(res.locals.user)) throw new ErrorMessage('您没有权限进行此操作。');
     }
 
+    problem.allowedManage = await problem.isAllowedManageBy(res.locals.user);
+
     res.render('problem_import', {
       problem: problem
     });
@@ -377,11 +381,13 @@ app.post('/problem/:id/import', async (req, res) => {
 
       problem = await Problem.create();
 
+      if (await res.locals.user.hasPrivilege('manage_problem')) {
         let customID = parseInt(req.body.id);
         if (customID) {
           if (await Problem.fromID(customID)) throw new ErrorMessage('ID 已被使用。');
           problem.id = customID;
         } else if (id) problem.id = id;
+      }
 
       problem.user_id = res.locals.user.id;
       problem.publicizer_id = res.locals.user.id;

views/problem_edit.ejs

@@ -13,7 +13,7 @@
       </div>
       <div class="ui bottom attached tab segment active" data-tab="edit">
         <div class="field">
-          <% if (problem.new || problem.allowedManage) { %>
+          <% if (problem.allowedManage) { %>
             <label for="id">
               <% if (problem.new) { %>
                 题目编号

views/problem_import.ejs

@@ -7,10 +7,12 @@
   </div>
 
   <form class="ui form" action="<%= syzoj.utils.makeUrl(['problem', problem.id, 'import']) %>" method="post">
+      <% if (problem.allowedManage) { %>
           <div class="field">
               <label>题目编号</label>
               <input type="text" name="id" value="<%= problem.id ? problem.id : '' %>" placeholder="留空则自动延伸" <%= problem.new ? '' : 'disabled' %>>
           </div>
+      <% } %>
       <div class="field">
           <label>题目链接</label>
           <input type="text" name="url" placeholder="如：http://example.com/problem/1">