Check for worker_id (no duplicate allowed)

controllers/prototype/dbrequests.js

@@ -594,6 +594,40 @@ DBReq.UserIdChecker.prototype.finish = function() {
     this.finishAction(this.finalResult);
 };
 
+DBReq.UserNameChecker = function(name, finishAction) {
+    this.name = name;
+    this.finishAction = finishAction;
+    var self = this;
+    pg.connect(pgc.url, function(err, client, release) {
+        self.client = client;
+        self.release = release;
+        self.execute();
+    });
+};
+
+DBReq.UserNameChecker.prototype.execute = function() {
+    var self = this;
+    this.client.query(
+        "SELECT count(id) > 0 AS answer FROM users WHERE worker_id = $1",
+        [self.name],
+        function(err, result) {
+            if (err !== null)
+                Log.dberror(err + ' in UserNameChecker');
+            self.finalResult = result.rows[0].answer;
+            self.finish();
+        }
+    );
+
+};
+
+DBReq.UserNameChecker.prototype.finish = function() {
+    this.release();
+    this.client = null;
+    this.release = null;
+
+    this.finishAction(this.finalResult);
+};
+
 /**
  * Class that creates an experiment
  * @param id {Number} id of the experiment to check
@@ -671,7 +705,7 @@ DBReq.ExpGetter.prototype.execute = function() {
     this.client.query(
         "SELECT  " +
             "experiment.id as exp_id, " +
-            "users.name as username, " +
+            "users.worker_id as username, " +
             "scene.name as scenename, " +
             "users.id as user_id " +
         "FROM experiment, users, scene " +
@@ -757,6 +791,10 @@ DBReq.checkUserId = function(id, callback) {
     new DBReq.UserIdChecker(id, callback);
 };
 
+DBReq.checkUserName = function(name, callback) {
+    new DBReq.UserNameChecker(name, callback);
+};
+
 /**
  * Checks if an experiment id exists
  * @memberof DBReq

controllers/prototype/index.js

@@ -148,7 +148,7 @@ module.exports.tutorial = function(req, res) {
             req.session.save();
 
             res.setHeader('Content-Type', 'text/html');
-            res.render('tutorial.jade', res.lcals, function(err, result) {
+            res.render('tutorial.jade', res.locals, function(err, result) {
                 res.send(result);
             });
         });
@@ -211,7 +211,11 @@ module.exports.viewer = function(req, res, next) {
 module.exports.userstudy = function(req, res) {
     res.setHeader('Content-Type', 'text/html');
 
-    res.render('user_study.jade', res.lcals, function(err, result) {
+    res.locals.identificationFailed = req.session.identificationFailed;
+    req.session.identificationFailed = false;
+    req.session.save();
+
+    res.render('user_study.jade', res.locals, function(err, result) {
         res.send(result);
     });
 

controllers/prototype/views/user_study.jade

@@ -3,6 +3,14 @@ extends ../../../views/base.jade
 block extrahead
     link(rel="stylesheet", href="/static/css/signin.css")
 
+block extrabody
+    if identificationFailed
+        .container
+            .alert.alert-danger.alert-dismissible(role="alert", style={'margin-top':'20px'})
+                button.close(type="button", data-dismiss="alert", aria-label="Close")
+                    span(aria-hidden="true") ×
+                <strong>Error</strong> : this id is already used !
+
 block content
     form.form-signin(method="POST", action='/identification')
         h2 Please sign in
@@ -13,10 +21,11 @@ block content
 
         div(style={'text-align': 'center', 'margin-top':'10px', 'margin-bottom':'10px'})
             label.radio-inline
-                input(type='radio', name='inputGender', value="male")
+                input(type='radio', name='inputGender', value="male", checked)
                 | Male
             label.radio-inline
                 input(type='radio', name='inputGender', value="female")
                 | Female
 
         button.btn.btn-lg.btn-primary.btn-block(type='submit') Sign in
+

posts/identification/index.js

@@ -4,24 +4,31 @@ var db = require('../../controllers/prototype/dbrequests.js');
 var Log = require('../../lib/NodeLog.js');
 
 module.exports.index = function(req, res) {
+    db.checkUserName(req.body.inputId, function(ok) {
+        if (!ok) {
+            db.tryUser(req.session.user_id, function(id) {
+                req.session.user_id = id;
+                req.session.save();
 
-    db.tryUser(req.session.user_id, function(id) {
-        req.session.user_id = id;
-        req.session.save();
+                pg.connect(secret.url, function(err, client, release) {
+                    client.query(
+                        "UPDATE Users SET worker_id = $1, age = $2, male = $3 WHERE id = $4;",
+                        [req.body.inputId, req.body.inputAge, req.body.inputGender === 'male', req.session.user_id],
+                        function(err, result) {
+                            if (err !== null)
+                                Log.dberror(err + ' in identfication');
+                            release();
+                        }
+                    );
+                });
 
-        pg.connect(secret.url, function(err, client, release) {
-            client.query(
-                "UPDATE Users SET worker_id = $1, age = $2, male = $3 WHERE id = $4;",
-                [req.body.inputId, req.body.inputAge, req.body.inputGender === 'male', req.session.user_id],
-                function(err, result) {
-                    if (err !== null)
-                        Log.dberror(err + ' in identfication');
-                    release();
-                }
-            );
-        });
+                res.redirect('/');
 
-        res.redirect('/');
+            });
+        } else {
+            req.session.identificationFailed = true;
+            res.redirect('/user-study');
+        }
     });
 
 };

views/base.jade

@@ -24,6 +24,8 @@ html(lang='fr')
 
                 block links
 
+        block extrabody
+
         section#main-section.container
             if alertCookie
                 .alert.alert-warning.alert-dismissible(role="alert", style={'margin-top':'20px'})