RSS function

src/config.default.json

@@ -2,6 +2,7 @@
   "node_port": 3000,
   "data_dir": "data",
   "view_engine": "ejs",
+  "loopback_url": "http://localhost:3000",
   "modules": {
     "plantuml": false,
     "rss": true,
@@ -22,6 +23,8 @@
     "default_thumbnail": null
   },
   "rss": {
+    "title": "mygitblog RSS feed",
+    "description": "a generated RSS feed from my articles",
     "endpoint": "/rss",
     "length": 10
   },

src/rss.js

@@ -0,0 +1,40 @@
+const convert = require('xml-js');
+
+const mapArticle = (url, article) => {
+  return {
+    'title': {'_text': article.title},
+    'link': {'_text': (url + article.url).replace(/([^:])\/\//g, '$1/')},
+    'pubDate': {'_text': article.date.toString()},
+  };
+};
+
+module.exports = (config) => {
+  return {
+    get: (dict) => {
+      const items = Object.values(dict)
+        .sort((a, b) => ('' + b.path).localeCompare(a.path))
+        .slice(0, config['rss']['length']);
+      const data = {
+        '_declaration': {
+          '_attributes': {
+            'version': '1.0',
+            'encoding': 'UTF-8'
+          }
+        },
+        'rss': {
+          '_attributes': {
+            'version': '2.0'
+          },
+          'title': {'_text': config['rss']['title']},
+          'description': {'_text': config['rss']['description']},
+          'link': {'_text': config['loopback_url']},
+          'lastBuildDate': {'_text': new Date().toString()},
+          'lastPubDate': {'_text': new Date().toString()},
+          'ttl': {'_text': '60'},
+          'item': items.map((a) => mapArticle(config['loopback_url'], a))
+        }
+      };
+      return convert.js2xml(data, {compact: true});
+    }
+  };
+};