add demos cache, middleware and POST echo

Author: SergioCrisostomo

demos/index.js

@@ -0,0 +1,10 @@
+"use strict";
+
+var project = 'demos';
+var demos = require('../middleware/demos')(project, {
+	title: "MooTools Demos"
+});
+
+module.exports = function(app){
+	app.get('/demos/', demos);
+};

index.js

@@ -49,6 +49,7 @@ app.use(bodyParser.json());
 
 // fix trailing slashes in path
 app.use(function(req, res, next){
+	if (req.method == 'POST') return next();
 	if (req.path != '/' && req.path.substr(-1) == '/'){
 		var query = req.url.slice(req.path.length);
 		res.redirect(301, req.path.slice(0, -1) + query);
@@ -62,7 +63,6 @@ if (app.get('env') == 'development'){
 
 	app.use(morgan('dev'));
 	app.use(errorhandler());
-
 	app.use(function setJadePretty(req, res, next){
 		res.locals.pretty = true;
 		res.locals.cache = false;
@@ -79,7 +79,7 @@ require('./middleware/build-static')(app, {
 	dirname: __dirname
 });
 
-app.use(express.static(__dirname + '/public'));
+app.use(express.static(__dirname + '/public', { redirect: false }));
 
 // github, twitter & blog feeds
 var githubEvents = require('./middleware/githubEvents')({
@@ -88,7 +88,7 @@ var githubEvents = require('./middleware/githubEvents')({
 var twitter = require('./middleware/twitter')();
 var blogData = require('./blog/data');
 function getLatestBlog(req, res, next){
-	blogData.get(function(err, blog) {
+	blogData.get(function(err, blog){
 		if (err) next(err);
 		res.locals.lastBlogPost = blog.posts[0];
 		next();
@@ -114,6 +114,7 @@ app.get('/search', function(req, res){
 
 require('./core')(app);
 require('./more')(app);
+require('./demos')(app);
 require('./blog')(app);
 require('./books')(app);
 require('./builder')(app);
@@ -139,6 +140,13 @@ app.get(/^\/download/i, function(req, res){
 	res.redirect(301, '/core');
 });
 
+// for demos to echo Requests
+app.post('/echo/:type', function(req, res){
+	var type = req.params.type;
+	res.send(req.body[type]);
+	res.end();
+});
+
 // handle 404 errors
 app.get('*', function(req, res, next){
 	var err = new Error();

middleware/demos.js

@@ -0,0 +1,91 @@
+"use strict";
+
+var fs = require('fs');
+var path = require('path');
+var async = require('async');
+var pkg = require('../package.json');
+var waitForIt = require('../lib/waitForIt');
+var getFiles = require('../lib/getFiles');
+var loadJSON = require('../lib/loadJSON');
+var associate = require('../lib/associate');
+var debounce = require('../lib/debounce');
+
+
+function filterToc(file, cb){
+	cb(!fs.statSync(file).isDirectory() && file.indexOf('toc-demos.json') == -1 && path.extname(file).slice(1) == 'json');
+}
+
+function loadFiles(dir, callback){
+
+	var addPath = function(files, cb){
+		async.map(files, function(fileName, cbMap){
+			cbMap(null, path.join(dir, fileName));
+		}, cb);
+	}
+	var filterFiles = function(files, cb){
+		async.filter(files, filterToc, function(filtered){
+			cb(null, filtered);
+		});
+	}
+	var addContent = function(arr, cb){
+		async.map(arr, loadJSON, cb);
+	}
+	var loadToc = function(filesContent, cb){
+		loadJSON(dir + '/toc-demos.json', function(err, data){
+			cb(err, !err && {
+				content: associate(Object.keys(data), filesContent),
+				toc: data
+			});
+		});
+	}
+	var compiler = async.compose(loadToc, addContent, filterFiles, addPath, fs.readdir);
+	compiler(dir, callback);
+}
+
+module.exports = function(project, options){
+
+	if (!project){
+		throw new Error("'project' argument is required");
+	}
+
+	if (!options) options = {};
+	if (!options.title) options.title = project;
+
+	var dir = path.join(__dirname, '..', pkg._buildOutput, project, 'docs');
+	var files = async.apply(loadFiles, dir);
+	var loadDemos = waitForIt(files);
+
+	fs.watch(dir, debounce(function(){
+		console.log('resetting ' + dir + ' docs data');
+		loadDemos.reset();
+	}));
+
+	function send404(next){
+		var err404 = new Error();
+		err404.status = 404;
+		next(err404);
+	}
+
+	return function(req, res, next){
+
+		loadDemos.get(function(err, results){
+
+			if (err) return next(err);
+			var demo = req.query.demo || Object.keys(results.content)[0];
+			var toc = results.toc[demo];
+			var data = results.content[demo];
+			if (!data) return send404(next);
+			
+			res.render(project, {
+				title: options.title,
+				navigation: 'demos',
+				content: data,
+				description: data.details,
+				demoName: toc.description.name,
+				dependencies: toc.description.dependencies || 'dependencies/more/',
+				version: pkg._projects.core.versions[0],
+				toc: results.toc
+			});
+		});
+	};
+};