Rename files to make it easier to move files around

bin/deck

@@ -11,6 +11,10 @@ var handlebars = require('handlebars');
 var app = express();
 var staticHandler = express['static'].bind(express);
 
+function toInt(num) {
+  return parseInt(num, 10);
+}
+
 app.use((function log() {
   var text = '{{date}} {{req.method}} {{req.url}}';
   var logTemplate = handlebars.compile(text);
@@ -50,17 +54,27 @@ function index(req, res) {
 
 app.get('/', index);
 
-app.get('/slides', function showHandler(req, res) {
+function getMarkdownFiles(cb) {
   fs.readdir(pathToFile('data', 'slide'), function (err, files) {
+    if (err) {
+      return cb(err);
+    }
     files.sort();
-    var jsonFiles = _.filter(files, function (file) {
+    var markdownFiles = _.filter(files, function (file) {
       return /^\d+\.md$/.test(file);
     });
+    cb(null, markdownFiles);
+  });
+}
 
-    res.send(_.map(jsonFiles, function (file) {
-      return {
-        id: parseInt(file.replace(/\.md$/, ''), 10)
-      };
+app.get('/slides', function showHandler(req, res) {
+  getMarkdownFiles(function (err, files) {
+    if (err) {
+      return renderError(res, err);
+    }
+
+    res.send(_.map(files, function (file, index) {
+      return {id: index + 1};
     }));
   });
 });
@@ -71,33 +85,23 @@ app.get(/slide\/(\d+)/, function showHandler(req, res, next) {
     return;
   }
 
-  var slideIndex = req.params[0];
+  var slideIndex = toInt(req.params[0]);
 
-  fs.readdir(pathToFile('data', 'slide'), function (err, files) {
+  getMarkdownFiles(function (err, files) {
     if (err) {
       return renderError(res, err);
     }
-
-    files.sort();
-    var markdownFiles = _.filter(files, function (file) {
-      return /\.md$/.test(file);
-    });
-
-    if (slideIndex > markdownFiles.length) {
+    if (slideIndex > files.length) {
       return next();
     }
 
-    var markdownFile = markdownFiles[slideIndex - 1];
+    var markdownFile = files[slideIndex - 1];
     var markdownPath = pathToFile('data', 'slide', markdownFile);
     fs.readFile(markdownPath, {encoding: 'utf8'}, function (err, content) {
       if (err) {
         return renderError(res, err);
       }
-
-      res.send({
-        id: parseInt(slideIndex, 10),
-        copy: content
-      });
+      res.send({id: toInt(slideIndex), copy: content});
     });
   });
 });