重构框架，增加比赛功能

hydro/lib/template.js

@@ -0,0 +1,41 @@
+const
+    path = require('path'),
+    nunjucks = require('nunjucks'),
+    markdown = require('./markdown'),
+    options = require('../options'),
+    perm = require('../permission'),
+    builtin = require('../model/builtin'),
+    model = require('../model'),
+    misc = require('../lib/misc');
+
+class Nunjucks extends nunjucks.Environment {
+    constructor() {
+        super(
+            new nunjucks.FileSystemLoader(path.resolve(options.template.path)),
+            { autoescape: true, trimBlocks: true }
+        );
+        this.addFilter('json', function (self) {
+            return JSON.stringify(self);
+        }, false);
+        this.addFilter('assign', function (self, data) {
+            return Object.assign(self, data);
+        });
+        this.addFilter('markdown', function (self) {
+            return markdown.render(self);
+        });
+        this.addFilter('gravatar_url', misc.gravatar_url);
+        this.addFilter('format_size', misc.format_size);
+        this.addGlobal('typeof', o => typeof o);
+        this.addGlobal('console', console);
+        this.addGlobal('static_url', str => `/${str}`);
+        this.addGlobal('reverse_url', str => str);
+        this.addGlobal('datetime_span', misc.datetime_span);
+        this.addGlobal('paginate', misc.paginate);
+        this.addGlobal('perm', perm);
+        this.addGlobal('status', builtin.STATUS);
+        this.addGlobal('model', model);
+    }
+}
+let env = new Nunjucks();
+
+module.exports = env;