Add import problem

config-example.json

@@ -20,6 +20,11 @@
       "show": true
     }
   },
+  "limit": {
+    "time_limit": 10000,
+    "memory_limit": 1024,
+    "data_size": 209715200
+  },
   "page": {
     "problem": 50,
     "problem_statistics": 10,

models/problem.js

@@ -242,11 +242,14 @@ class Problem extends Model {
   }
 
   async updateTestdata(path) {
-    let fs = Promise.promisifyAll(require('fs'));
+    let fs = Promise.promisifyAll(require('fs-extra'));
 
     let buf = await fs.readFileAsync(path);
+
+    if (buf.length > syzoj.config.limit.data_size) throw 'Testdata too large.'
+
     let key = syzoj.utils.md5(buf);
-    await fs.rename(path, TestData.resolvePath(key));
+    await fs.moveAsync(path, TestData.resolvePath(key), { overwrite: true });
 
     if (this.testdata_id) {
       let tmp = this.testdata_id;
@@ -262,6 +265,26 @@ class Problem extends Model {
     });
     await file.save();
     this.testdata_id = file.id;
+
+    await this.save();
+  }
+
+  async validate() {
+    if (this.time_limit <= 0) return 'Invalid time limit';
+    if (this.time_limit > syzoj.config.limit.time_limit) return 'Time limit too large';
+    if (this.memory_limit <= 0) return 'Invalid memory limit';
+    if (this.memory_limit > syzoj.config.limit.memory_limit) return 'Memory limit too large';
+
+    let filenameRE = /^[\w \-\+\.]*$/;
+    if (this.file_io_input_name && !filenameRE.test(this.file_io_input_name)) return 'Invalid input file name';
+    if (this.file_io_output_name && !filenameRE.test(this.file_io_output_name)) return 'Invalid output file name';
+
+    if (this.file_io) {
+      if (!this.file_io_input_name) return 'No input file name';
+      if (!this.file_io_output_name) return 'No output file name';
+    }
+
+    return null;
   }
 
   async getJudgeState(user, acFirst) {
@@ -371,6 +394,33 @@ class Problem extends Model {
     return res;
   }
 
+  async setTags(newTagIDs) {
+    let ProblemTagMap = syzoj.model('problem_tag_map');
+
+    let oldTagIDs = (await this.getTags()).map(x => x.id);
+
+    let delTagIDs = oldTagIDs.filter(x => !newTagIDs.includes(x));
+    let addTagIDs = newTagIDs.filter(x => !oldTagIDs.includes(x));
+
+    for (let tagID of delTagIDs) {
+      let map = await ProblemTagMap.findOne({ where: {
+        problem_id: this.id,
+        tag_id: tagID
+      } });
+
+      await map.destroy();
+    }
+
+    for (let tagID of addTagIDs) {
+      let map = await ProblemTagMap.create({
+        problem_id: this.id,
+        tag_id: tagID
+      });
+
+      await map.save();
+    }
+  }
+
   getModel() { return model; }
 }
 

modules/problem.js

@@ -126,6 +126,38 @@ app.get('/problem/:id', async (req, res) => {
   }
 });
 
+app.get('/problem/:id/export', async (req, res) => {
+  try {
+    let id = parseInt(req.params.id);
+    let problem = await Problem.fromID(id);
+    if (!problem || !problem.is_public) throw 'No such problem.';
+
+    let obj = {
+      title: problem.title,
+      description: problem.description,
+      input_format: problem.input_format,
+      output_format: problem.output_format,
+      example: problem.example,
+      limit_and_hint: problem.limit_and_hint,
+      time_limit: problem.time_limit,
+      memory_limit: problem.memory_limit,
+      file_io: problem.file_io,
+      file_io_input_name: problem.file_io_input_name,
+      file_io_output_name: problem.file_io_output_name,
+      tags: []
+    };
+
+    let tags = await problem.getTags();
+
+    obj.tags = tags.map(tag => tag.name);
+
+    res.send({ success: true, obj: obj });
+  } catch (e) {
+    syzoj.log(e);
+    res.send({ success: false, error: e });
+  }
+});
+
 app.get('/problem/:id/edit', async (req, res) => {
   try {
     let id = parseInt(req.params.id) || 0;
@@ -156,7 +188,7 @@ app.get('/problem/:id/edit', async (req, res) => {
 
 app.post('/problem/:id/edit', async (req, res) => {
   try {
-    let id = parseInt(req.params.id);
+    let id = parseInt(req.params.id) || 0;
     let problem = await Problem.fromID(id);
     if (!problem) {
       problem = await Problem.create();
@@ -183,28 +215,97 @@ app.post('/problem/:id/edit', async (req, res) => {
       req.body.tags = [req.body.tags];
     }
 
-    let oldTagIDs = (await problem.getTags()).map(x => x.id);
     let newTagIDs = await req.body.tags.map(x => parseInt(x)).filterAsync(async x => ProblemTag.fromID(x));
+    await problem.setTags(newTagIDs);
 
-    let delTagIDs = oldTagIDs.filter(x => !newTagIDs.includes(x));
-    let addTagIDs = newTagIDs.filter(x => !oldTagIDs.includes(x));
+    res.redirect(syzoj.utils.makeUrl(['problem', problem.id]));
+  } catch (e) {
+    syzoj.log(e);
+    res.render('error', {
+      err: e
+    });
+  }
+});
 
-    for (let tagID of delTagIDs) {
-      let map = await ProblemTagMap.findOne({ where: {
-        problem_id: id,
-        tag_id: tagID
-      } });
+app.get('/problem/:id/import', async (req, res) => {
+  try {
+    let id = parseInt(req.params.id) || 0;
+    let problem = await Problem.fromID(id);
+    if (!problem) {
+      problem = await Problem.create();
+      problem.id = id;
+      problem.user_id = res.locals.user.id;
+    } else {
+      if (!await problem.isAllowedUseBy(res.locals.user)) throw 'Permission denied.';
+      if (!await problem.isAllowedEditBy(res.locals.user)) throw 'Permission denied.';
+    }
 
-      await map.destroy();
+    res.render('problem_import', {
+      problem: problem
+    });
+  } catch (e) {
+    syzoj.log(e);
+    res.render('error', {
+      err: e
+    });
+  }
+});
+
+app.post('/problem/:id/import', async (req, res) => {
+  try {
+    let id = parseInt(req.params.id) || 0;
+    let problem = await Problem.fromID(id);
+    if (!problem) {
+      problem = await Problem.create();
+      if (id) problem.id = id;
+      problem.user_id = res.locals.user.id;
+    } else {
+      if (!await problem.isAllowedUseBy(res.locals.user)) throw 'Permission denied.';
+      if (!await problem.isAllowedEditBy(res.locals.user)) throw 'Permission denied.';
     }
 
-    for (let tagID of addTagIDs) {
-      let map = await ProblemTagMap.create({
-        problem_id: id,
-        tag_id: tagID
-      });
+    let request = require('request-promise');
+    let url = require('url');
+
+    let json = await request({
+      uri: url.resolve(req.body.url, 'export'),
+      timeout: 1500,
+      json: true
+    });
+
+    if (!json.success) throw `Failed to load problem: ${json.error}`;
+
+    problem.title = json.obj.title;
+    problem.description = json.obj.description;
+    problem.input_format = json.obj.input_format;
+    problem.output_format = json.obj.output_format;
+    problem.example = json.obj.example;
+    problem.limit_and_hint = json.obj.limit_and_hint;
+    problem.time_limit = json.obj.time_limit;
+    problem.memory_limit = json.obj.memory_limit;
+    problem.file_io = json.obj.file_io;
+    problem.file_io_input_name = json.obj.file_io_input_name;
+    problem.file_io_output_name = json.obj.file_io_output_name;
+
+    let validateMsg = await problem.validate();
+    if (validateMsg) throw 'Invalid problem: ' + validateMsg;
 
-      await map.save();
+    await problem.save();
+
+    let tagIDs = (await json.obj.tags.mapAsync(name => ProblemTag.findOne({ where: { name: name } }))).filter(x => x).map(tag => tag.id);
+    await problem.setTags(tagIDs);
+
+    let download = require('download');
+    let tmp = require('tmp-promise');
+    let tmpFile = await tmp.file();
+    let fs = require('bluebird').promisifyAll(require('fs'));
+
+    try {
+      let data = await download(url.resolve(req.body.url, 'download'));
+      await fs.writeFileAsync(tmpFile.path, data);
+      await problem.updateTestdata(tmpFile.path);
+    } catch (e) {
+      syzoj.log(e);
     }
 
     res.redirect(syzoj.utils.makeUrl(['problem', problem.id]));
@@ -252,6 +353,10 @@ app.post('/problem/:id/data', app.multer.single('testdata'), async (req, res) =>
     problem.file_io = req.body.io_method === 'file-io';
     problem.file_io_input_name = req.body.file_io_input_name;
     problem.file_io_output_name = req.body.file_io_output_name;
+
+    let validateMsg = await problem.validate();
+    if (validateMsg) throw 'Invalid problem: ' + validateMsg;
+
     if (req.file) {
       await problem.updateTestdata(req.file.path);
     }
@@ -330,9 +435,12 @@ app.get('/problem/:id/download', async (req, res) => {
 
     await problem.loadRelationships();
 
+    if (!problem.testdata) throw 'No testdata';
+
     res.download(problem.testdata.getPath(), `testdata_${id}.zip`);
   } catch (e) {
     syzoj.log(e);
+    res.status(404);
     res.render('error', {
       err: e
     });

package.json

@@ -27,10 +27,12 @@
     "ansi-to-html": "^0.4.2",
     "body-parser": "^1.15.2",
     "cookie-parser": "^1.4.3",
+    "download": "^5.0.3",
     "ejs": "^2.5.2",
     "express": "^4.14.0",
     "express-session": "^1.14.1",
     "file-size": "^1.0.0",
+    "fs-extra": "^2.1.2",
     "gravatar": "^1.5.2",
     "moemark-renderer": "^1.2.5",
     "moment": "^2.15.0",
@@ -42,6 +44,7 @@
     "sequelize": "^3.24.3",
     "session-file-store": "^1.0.0",
     "sqlite3": "^3.1.4",
-    "syzoj-divine": "^1.0.0"
+    "syzoj-divine": "^1.0.0",
+    "tmp-promise": "^1.0.3"
   }
 }

views/problem_import.ejs

@@ -0,0 +1,16 @@
+<% this.title = '导入题目'; %>
+<% include header %>
+<div class="padding">
+  <h1 style="margin-bottom: 30px; ">导入题目</h1>
+  <form class="ui form" action="<%= syzoj.utils.makeUrl(['problem', problem.id, 'import']) %>" method="post">
+      <div class="field">
+          <label>题目 ID</label>
+          <input type="text" value="<%= problem.id ? problem.id : '新题目' %>" disabled>
+      </div>
+      <div class="field">
+          <label>题目链接</label>
+          <input type="text" name="url" placeholder="如：http://example.com/problem/1">
+      </div>
+      <button type="submit" class="ui button">提交</button>
+  </form>
+<% include footer %>

views/problems.ejs

@@ -8,7 +8,7 @@ if (typeof tags !== 'undefined') tagIDs = tags.map(x => x.id);
 <div class="padding">
   <div class="ui grid">
     <div class="row">
-      <div class="eight wide column">
+      <div class="seven wide column">
         <% if (typeof tags !== 'undefined') { %>
           <%
           tags.sort((a, b) => {
@@ -24,7 +24,7 @@ if (typeof tags !== 'undefined') tagIDs = tags.map(x => x.id);
           <% } %>
         <% } %>
       </div>
-      <div class="eight wide right aligned column">
+      <div class="nine wide right aligned column">
         <div class="ui toggle checkbox" id="show_tag">
           <style id="show_tag_style"></style>
           <script>
@@ -55,12 +55,19 @@ if (typeof tags !== 'undefined') tagIDs = tags.map(x => x.id);
         <div style="margin-left: 10px; display: inline-block; ">
           <% if (user && user.is_admin) { %>
             <% if (typeof tags !== 'undefined' && tags.length === 1) { %>
-              <a style="margin-left: 10px; " href="<%= syzoj.utils.makeUrl(['problems', 'tag', tags[0].id, 'edit']) %>" class="ui mini blue button">编辑标签</a>
+              <a style="margin-left: 10px; " href="<%= syzoj.utils.makeUrl(['problems', 'tag', tags[0].id, 'edit']) %>" class="ui labeled icon mini blue button"><i class="write icon"></i> 编辑标签</a>
             <% } %>
-            <a style="margin-left: 10px; " href="<%= syzoj.utils.makeUrl(['problems', 'tag', 0, 'edit']) %>" class="ui mini green button">添加标签</a>
+            <a style="margin-left: 10px; " href="<%= syzoj.utils.makeUrl(['problems', 'tag', 0, 'edit']) %>" class="ui labeled icon mini green button"><i class="plus icon"></i> 添加标签</a>
           <% } %>
           <% if (user) { %>
-            <a style="margin-left: 10px; " href="<%= syzoj.utils.makeUrl(['problem', 0, 'edit']) %>" class="ui mini button">添加题目</a>
+            <div style="margin-left: 10px; " class="ui mini buttons">
+              <div class="ui labeled icon mini dropdown button" id="add_problem_dropdown"><i class="plus icon"></i> 添加题目
+              <div class="menu">
+                <a class="item" href="<%= syzoj.utils.makeUrl(['problem', 0, 'edit']) %>"><i class="file icon"></i> 新建题目</a>
+                <a class="item" href="<%= syzoj.utils.makeUrl(['problem', 0, 'import']) %>"><i class="cloud download icon"></i> 导入题目</a>
+              </div>
+              </div>
+            </div>
           <% } %>
         </div>
       </div>
@@ -137,6 +144,10 @@ document.addEventListener('keydown', function (event) {
   if (event.keyCode === 39) document.getElementById('page_next').click();
   else if (event.keyCode === 37) document.getElementById('page_prev').click();
 });
+
+$(function () {
+  $('#add_problem_dropdown').dropdown();
+});
 </script>
 </div>
 <% include footer %>