stats counting implemented

server.js

@@ -9,7 +9,14 @@ var app = express();
 
 app.use(bodyParser.urlencoded({ extended: true }));
 
-var CACHE = new LRU(30);
+var MODELS = {};
+var CACHE = new LRU({
+  max: 50,
+  dispose: key => {
+    MODELS[key].save();
+    delete MODELS[key];
+  }
+});
 
 var getTimeStamp = () => {
   var timestamp = new Date().getTime();
@@ -68,27 +75,38 @@ app.get(/\/([a-z0-9]+\/export)/, function (req, res) {
 
 app.get(/\/([a-z0-9]+\/stats)/, function (req, res) {
   var link = req.params["0"].replace("/stats", "");
-  storage.getNote(link).then(note => note 
-  ? res.send(view.buildStats(note))
+  var promise = link in MODELS
+    ? new Promise(resolve => resolve(MODELS[link]))
+    : storage.getNote(link);
+  promise.then(note => note
+    ? res.send(view.renderStats(note))
     : notFound(res));
 });
 
 app.get(/\/([a-z0-9]+)/, function (req, res) {
   var link = req.params["0"];
-  if (CACHE.has(link)) res.send(CACHE.get(link));
-  else storage.getNote(link).then(note => {
+  if (CACHE.has(link)) {
+    (link in MODELS) && MODELS[link].views++;
+    res.send(CACHE.get(link));
+  } else storage.getNote(link).then(note => {
     if (!note) return notFound(res);
-    var content = view.buildNote(note);
+    var content = view.renderNote(note);
     CACHE.set(link, content);
+    MODELS[link] = note;
     res.send(content);
   });
 });
 
 var sendResponse = (res, code, message) =>
-  res.status(code).send(view.buildPage(message, "<h1>" + message + "</h1>", "")); 
+  res.status(code).send(view.renderPage(message, "<h1>" + message + "</h1>", ""));
 
 var notFound = res => sendResponse(res, 404, "Not found");
 
 var server = app.listen(3000, function () {
   console.log('NoteHub server listening on port %s', server.address().port);
 });
+
+setInterval(() => {
+  console.log("saving stats...");
+  Object.keys(MODELS).forEach(id => MODELS[id].save())
+}, 60 * 5 * 1000);

src/view.js

@@ -9,14 +9,14 @@ var deriveTitle = text => text
   .split(/[\n\r]/)[0].slice(0,25)
   .replace(/[^a-zA-Z0-9\s]/g, "");
 
-var buildPage = (title, content, footer) => pageTemplate
+var renderPage = (title, content, footer) => pageTemplate
   .replace("%TITLE%", title)
   .replace("%CONTENT%", content)
   .replace("%FOOTER%", footer);
   
-module.exports.buildPage = buildPage;
+module.exports.renderPage = renderPage;
 
-module.exports.buildStats = note => buildPage(deriveTitle(note.text), 
+module.exports.renderStats = note => renderPage(deriveTitle(note.text), 
   `<h2>Statistics</h2>
   <table>
     <tr><td>Published</td><td>${note.published}</td></tr>
@@ -25,7 +25,7 @@ module.exports.buildStats = note => buildPage(deriveTitle(note.text),
   </table>`,
   "");
 
-module.exports.buildNote = note => buildPage(deriveTitle(note.text), 
+module.exports.renderNote = note => renderPage(deriveTitle(note.text), 
   marked(note.text),
   footerTemplate.replace(/%LINK%/g, note.id));