Preloading of the experiments

controllers/before-begin/views/index.jade

@@ -15,6 +15,6 @@ block content
     script.
         document.getElementById('next').onclick = function() {
             document.getElementById('next').disabled = true;
-            window.location = '/prototype/game';
+            window.location = '/prototype/play';
         }
 

controllers/prototype/dbrequests.js

@@ -920,6 +920,65 @@ DBReq.ExpIdChecker.prototype.finish = function() {
     this.finishAction(this.finalResult);
 };
 
+DBReq.LastExpGetter = function(userId, finishAction) {
+
+    var self = this;
+    this.userId = userId;
+    this.finishAction = finishAction;
+    this.finalResult = {};
+
+    pg.connect(pgc.url, function(err, client, release) {
+        self.client = client;
+        self.release = release;
+        self.execute();
+    });
+};
+
+DBReq.LastExpGetter.prototype.execute = function() {
+    var self = this;
+    this.client.query(
+        'SELECT scene_id AS "sceneId", \n' +
+        '       coin_1, \n' +
+        '       coin_2, \n' +
+        '       coin_3, \n' +
+        '       coin_4, \n' +
+        '       coin_5, \n' +
+        '       coin_6, \n' +
+        '       coin_7, \n' +
+        '       coin_8, \n' +
+        '       Experiment.recommendation_style AS "recommendationStyle" \n' +
+        'FROM Experiment, CoinCombination \n' +
+        'WHERE Experiment.coin_combination_id = CoinCombination.id \n' +
+        '      AND Experiment.user_id = $1 \n' +
+        'ORDER BY Experiment.id DESC \n' +
+        'LIMIT 1;',
+        [self.userId],
+        function (err, result) {
+            self.finalResult.sceneId = result.rows[0].sceneId;
+            self.finalResult.recommendationStyle = result.rows[0].recommendationStyle;
+            self.finalResult.coins = [
+                result.rows[0].coin_1,
+                result.rows[0].coin_2,
+                result.rows[0].coin_3,
+                result.rows[0].coin_4,
+                result.rows[0].coin_5,
+                result.rows[0].coin_6,
+                result.rows[0].coin_7,
+                result.rows[0].coin_8
+            ];
+            self.finish();
+        }
+    );
+};
+
+DBReq.LastExpGetter.prototype.finish = function() {
+    this.release();
+    this.client = null;
+    this.release = null;
+
+    this.finishAction(this.finalResult.sceneId, this.finalResult.recommendationStyle, this.finalResult.coins);
+}
+
 /**
  * Class that gets the info from all experiment
  * @param finishAction {function} callback that has as a parameter which is an
@@ -1133,4 +1192,8 @@ DBReq.getAllExps = function(callback) {
     new DBReq.ExpGetter(callback);
 };
 
+DBReq.getLastExp = function(id, callback) {
+    new DBReq.LastExpGetter(id, callback);
+};
+
 module.exports = DBReq;

controllers/prototype/index.js

@@ -34,35 +34,62 @@ module.exports.game = function(req, res) {
                 req.session.userId,
                 function(expId, coinCombinationId, sceneId, recommendationStyle, coins) {
 
-                    if (expId === undefined) {
+                    // if (expId === undefined) {
 
-                        res.redirect('/feedback');
-                        return;
+                    //     req.session.finished = true;
+                    //     req.session.save();
+                    //     return;
 
-                    }
+                    // }
 
-                    req.session.expId = expId;
-                    req.session.save();
+                    // req.session.expId = expId;
+                    // req.session.save();
 
-                    res.locals.scene = sceneToFunction(sceneId);
-                    res.locals.recommendationStyle = recommendationStyle;
-                    res.locals.coins = coins;
+                    // res.locals.scene = sceneToFunction(sceneId);
+                    // res.locals.recommendationStyle = recommendationStyle;
+                    // res.locals.coins = coins;
 
-                    res.setHeader('Content-Type','text/html');
-                    res.render('prototype_recommendation.jade', res.locals, function(err, result) {
-                        res.send(result);
-                    });
+                    // res.setHeader('Content-Type','text/html');
+                    // res.send("Ok");
                 });
 
         } else {
 
-            res.redirect('/');
 
         }
 
     });
 };
 
+module.exports.play = function(req, res) {
+
+    req.session.counter = req.session.counter === undefined ? 0 : req.session.counter + 1;
+    req.session.save();
+
+    if (req.session.counter > 2) {
+
+        res.redirect('/feedback');
+        return;
+
+    }
+
+    db.getLastExp(req.session.userId, function(sceneId, recoStyle, coins) {
+
+        res.locals.scene = sceneToFunction(sceneId);
+        res.locals.recommendationStyle= recoStyle;
+        res.locals.coins = coins;
+
+        // Prepare next experiment
+        module.exports.game(req, null);
+
+        res.setHeader('Content-Type', 'text/html');
+        res.render('prototype_recommendation.jade', res.locals, function(err, result) {
+            res.send(result);
+        });
+    });
+
+};
+
 module.exports.sponza = function(req, res) {
     res.setHeader('Content-Type', 'text/html');
 
@@ -127,6 +154,10 @@ module.exports.tutorial = function(req, res) {
 
             // 1 is the ID of peach scene
             db.createTutorial(req.session.userId, function(id, coins) {
+
+                // Generate next experiment
+                module.exports.game(req, null);
+
                 req.session.tutorialDone = true;
                 req.session.expId = id;
                 res.locals.coins = coins;

controllers/prototype/urls.js

@@ -10,5 +10,6 @@ module.exports = {
     '/prototype/coin-viewer/:scene': 'viewer',
     '/prototype/coin-checker/:scene': 'checker',
     '/user-study': 'userstudy',
-    '/prototype/next': 'next'
+    '/prototype/next': 'next',
+    '/prototype/play': 'play'
 };