Remy Mellet

Personnalized video game to gift

2016-12-18T16:13:41+00:00

As a side project, I’m developing KustGame a mobile video game where you can :

personnalize the player
add custom pictures
add special messages

The idea came when looking for a original way to offer a gift to my girlfriend : she had to finish the game to get the message indicating where was hidden the gift.

In order to have quickly a product to sell, I used :

GameMaker, since the software allowing you to develop quickly and easily a game compatible with iOS, Android, windows, html5
Mobirize, to create the static homepage without the need of knowing HTML (for free).
Plain PHP without framework to develop the simple backend (no Java, no Symfony)
Shared host
jQuery to add nice interactions in the customize form (no angular, no backbone)
PayPal for its simple API (NVP)

The aim of that version is to be as simple as possible and to test if there is a market.

The video game is planned to be sell before Christmas and published on the AppStore (iPhone) and Google Play Store (Android). By the way, Christmas is in 7 days, so the deadline is imminent.

Parsing empty column with OpenCSV

2015-11-15T20:18:03+00:00

Lets say you have the following 2 lines csv file :

jules,23
thomas,

And object :

Class Person {
  String name;
  Integer age;
  //getter + setter
}

When you use the java opencsv library to map that csv to the object, it will throw an exception :

Caused by: java.lang.NumberFormatException: Zero length string at 
java.lang.Integer.decode(Integer.java:1162) at 
com.sun.beans.editors.IntegerEditor.setAsText(IntegerEditor.java:39) at 
au.com.bytecode.opencsv.bean.CsvToBean.convertValue(CsvToBean.java:82) at 
au.com.bytecode.opencsv.bean.CsvToBean.processLine(CsvToBean.java:63) at 
au.com.bytecode.opencsv.bean.CsvToBean.parse(CsvToBean.java:48) … 22 more

[doesn’t work!!!!] After looking at the source code I tried to add my custom PropertyEditor:

public class IntegerEmptyEditor extends NumberEditor {
    public IntegerEmptyEditor() {
    }
    public void setAsText(String var1) throws IllegalArgumentException {
        this.setValue(var1 == null || var1.equals("")?null:Integer.decode(var1));
    }
}

PropertyEditorManager.registerEditor(Integer.class, IntegerEmptyEditor.class);
PropertyEditor pe = PropertyEditorManager.findEditor(Integer.class);
//  BUT RETURN IntegerEditor instead of IntegerEmptyEditor</span>

Instead, let’s treat all empty string value like null value :

CsvToBean csv = new CsvToBean() {
    protected Object convertValue(String value, PropertyDescriptor prop) throws InstantiationException, IllegalAccessException {
        if(StringUtils.isEmpty(value)) {
            value = null;
        }
        return super.convertValue(value, prop);
    }
};

Complete code mapping the csv file to the object :

CSVReader csvReader = new CSVReader(new FileReader("src/test/resources/utils/csv/person.csv"));
ColumnPositionMappingStrategy strat = new ColumnPositionMappingStrategy();
strat.setType(Person.class);
String[] columns = new String[] {"name", "age"};
strat.setColumnMapping(columns);
CsvToBean csv = new CsvToBean() {
    protected Object convertValue(String value, PropertyDescriptor prop) throws InstantiationException, IllegalAccessException {
        if(StringUtils.isEmpty(value)) {
            value = null;
        }
        return super.convertValue(value, prop);
    }
};
List<StopExt> list = csv.parse(strat, csvReader);
csvReader.close();

Create and test a service using translator container with Symfony2

2015-10-16T14:24:24+00:00

Here is the code to create a service which uses the translator component from Symfony2. The service is also tested.

Create the service

in messages.en.yml :

cb.texta1: Travel from %A% to %B%

in services.yml :

cb.labelbuilder:
  class: AppBundle\Service\LabelBuilder
  arguments: [@translator]

LabelBuilder.php :

namespace AppBundle\Service;

use Symfony\Component\Translation\TranslatorInterface;

class LabelBuilder {
    /**
     * @var TranslatorInterface
     */
    private $translator;

    public function __construct(TranslatorInterface $translator) {
        $this->translator = $translator;
    }

    public function buildText1($labelA, $labelB) {
        return $this->translator->trans(
            'cb.texta1',
            [
                '%A%' => $labelA,
                '%B%' => $labelB
            ]
        );
    }
}

Use the service in your controller

$this->get('cb.labelbuilder')->buildText1($lblA, $lblB);

To test with PHPUnit

Source SO

LabelBuilderTest.php

namespace AppBundle\Service;

use AppBundle\Entity\StatPriceDuration;
use Symfony\Bundle\FrameworkBundle\Test\WebTestCase;

class LabelBuilderTest extends WebTestCase {

    protected static $translation;

    public static function setUpBeforeClass() {
        $kernel = static::createKernel();
        $kernel->boot();
        self::$translation = $kernel->getContainer()->get('translator');
    }

    public function testBuildText1() {
        $builder = new LabelBuilder(self::$translation);

        $result = $builder->buildText1("Paris", "Lille");

        $this->assertEquals(
            trim($result),
            "Travel from Paris to Lille"
        );
    }
}

Comparabus

2013-12-15T19:30:28+00:00

Je développe depuis un an (Janvier 2013) un site permettant de comparer les prix des billets de car (ligne de bus régulières nationales et internationales). Vous pouvez y accéder depuis www.comparabus.com .

La plateforme permet à l’heure actuelle de comparer les prix d’Eurolines, iDBUS et megabus. Ce qui représente 630 villes desservies.

Si vous recherchez des prix imbattable pour vous déplacer (lentement!), venez de temps en temps jeter un coup d’oeil sur comparabus.com . Il vous est par exemple possible en ce moment d’effectuer un aller-retour Paris-Londres pour 2€50. Ou encore un Paris-Bruxelles pour 2€50 également.

Pourquoi avoir créé ce site?

Depuis 2 ans les compagnies de car ont le droit d’effectuer des trajets nationaux (avant c’était la SNCF qui avait le monopole, cf cabotage). Ainsi il est désormais possible d’effectuer un Paris-Lille en bus (avec idbus ou eurolines par exemple) ce qui était avant illégal. Etant donné que plusieurs autocaristes proposaient le même trajet (3 par exemple pour un Paris-Londres) il devenait intéressant de pouvoir comparer leurs tarifs facilement et rapidement; ce qui n’était pas possible au lancement de mon site.

Côté technique

Si vous vous interressez à la technique, le site est développé en php (framework Symfony), bien que j’aurai préféré le faire en JEE avec Spring MVC, et est hébergé sur une machine virtuelle d’OVH (Debian, VPS 512Mo de RAM). Les scripts sont quant à eux développés en Java.

Si vous avez des conseils ou critique, n’hésitez pas à utiliser formulaire de feedback disponible sur le site comparabus.com à droite. Si vous souhaitez que je continu à améliorer et reférencer de nouveaux autocariste soutenez moi en likant la page et en n’en parlant autour de vous!

Storing opening and closing times in database for stores

2013-11-24T12:18:06+00:00

Requirement:

Store can open and close many times during the day
Store can close the day after it opens (store opened after midnight)
Precision of the time must be 1/2 hour / 30minutes
Searching for the store opened at a certain time must be done efficiently
Every weeks have same business hours

Info:

Type “Time” doesn’t exists in MySQL

Example:

Mon : 10.00-14.00 17.00-22.00
Tue : 10.00-22.00
Wed : 10.00-22.30
Thu : 10.00-22.30
Fri : 10.30-01.00 (+1d)
Sat : 11.30-02.00 (+1d)
Sun : Closed

1/Encode all the opening-closing time of a store in one number

Let’s see the opening time table as an array. For instance if the store would be open from 10am to 2pm and 5pm to 10pm we would have:

000000000000000000001111111100000011111111110000 <=> 17575273562112

20*0 (20 first 1/2 hour closed) ; 8*1 (4 hours / 8 1/2hours openend) ; etc…

For one day there are 2^(24*2) = 2^48 possibilities
For one week there are 2^(24*2*7) = 2^336

As the bigger mysql integer size is 2^64 we don’t have big enough integer to encode it.

More explication here: http://remy-mellet.com/dev/b48encode.html

2/OpeningPeriod table

id
store_id
day [0=sun – 1=mon – … – 6=sat]
open [0am=0; 0.30am=1; 1am=2 … 11pm=46]
close [0am=0; 0.30am=1; 1am=2 … 11pm=46 … 2am(+1d)=52]

We must be able to store opening time during the night, so for the closing time, if it was open the day before we will add 48.
If the lastest time is 10am (d+1) <=> 48+20 = 68. So it can be encoded as a Mysql TINYINT ( 2^8 ).

Current time is 1915, Mon => curTime = ceil(19.252) = 39 ; curDay = 1 ; prevDay = 0;
Current time is 0130, Sun => curTime = ceil(1.52) = 3; curDay = 0; prevDay = 6;
Get the stores id open:

select distinct(p.store_id) from OpeningPeriod p  
where (day = curDay and open <= curTime and close >= curTime ) OR  
(day = prevDay and open <= curTime+48 and close >= curTime+48)

3/OpeningPeriod table w/o day

To simplify, instead of taking as reference for the opening day the beginning of the day, why not just take the beginning of the week? Thus we will take off the day column.

id
store_id
open [0am/Sun=0; 0.30am/Sun=1; 1am/Sun=2 … 11pm/Sun=46 … 6pm/Sat=324 (48*6+18*2)]
close [0am/Sun=0; 0.30am/Sun=1; 1am/Sun=2 … 2am/Sun = 4+336 = 340]

The open and close can be encoded as Mysql SMALLINT (2^16)

Current time is 19.15, Mon => curTime = ceil(19.252) = 39
Current time is 01.30, Sun => curTime = ceil(1.52) = 3

Get the stores id open:

select distinct(p.store_id) from OpeningPeriod p  
where (open <= curTime and close >= curTime ) OR  
(open <= curTime and close >= curTime+336)

Links:

http://stackoverflow.com/questions/2174523/storing-and-searching-opening-closing-times-for-stores
http://stackoverflow.com/questions/1036603/storing-business-hours-in-a-database
http://remy-mellet.com/dev/b48encode.html

CheckMyBus71 Horaires de Bus GTFS

2013-04-17T12:00:00+00:00

Dans le cadre du concours BeMyApp Windows, j’ai réalisé une webapp permettant de visualiser les horaires des bus du 71 au format GTFS. L’application est une webapp utilisant jQuery Mobile qui a été wrapper dans une webview afin de pouvoir être uploadé sur le store de Windows Phone.

L’application peu utiliser n’importe quel horaire au format GTFS lui donnant d’autres données.

Applications

Symfony 2 : This script is only accessible from localhost / You are not allowed to access this file

2011-11-09T12:28:50+00:00

Vous voulez accèder au fichier app_dev.php ou config.php de votre application Symfony 2, mais vous avez l’erreur “This script is only accessible from localhost” ou “You are not allowed to access this file”.
Récupérer votre IP et ajouter là dans le fichier app_dev.php et config.php en modifiant le code ci-dessous:

if (!in_array(@$_SERVER['REMOTE_ADDR'], array(
    '127.0.0.1',
    '::1',
	'MONIP'
))) {
    header('HTTP/1.0 403 Forbidden');
    exit('This script is only accessible from localhost.');
}

Utiliser Symfony 2 avec 1and1

2011-11-09T12:06:36+00:00

Symfony 2 à besoin de php 5.2.3. Vous devez donc créer/éditer le .htaccess à la racine et y ajouter:

AddType x-mapp-php6 .php

Cela va vous permettre d’utiliser la version php 5.4.0beta1.

Il reste maintenant le problème de timezone, pour cela créez un fichier php.ini dans le répertoire Symfony/web contenant:

date.timezone = "Europe/Paris"
short_open_tag = off
magic_quotes_gpc = off

Maintenant vous pouvez lancer, http://foo/bar/Symfony/web/config.php et vous ne devriez plus avoir de problèmes.

Draw SVG rectangle with 1,2,3 or 4 rounded corner

2011-09-05T19:24:37+00:00

Here is the code allowing you to draw with Raphael JS a rectangle with one or many corner rounded and to have a corner more rounded than the other.

This code will add roundedRectangle method to Raphael JS (how to extend Raphael).

roundedRectangle(x, y, width, height, upper_left_corner, upper_right_corner, lower_right_corner, lower_left_corner).

window.onload = function () {
    //roundedRectangle(x, y, width, height, upper_left_corner, upper_right_corner, lower_right_corner, lower_left_corner)
    Raphael.fn.roundedRectangle = function (x, y, w, h, r1, r2, r3, r4){
        var array = [];
        array = array.concat(["M",x,r1+y, "Q",x,y, x+r1,y]); //A
        array = array.concat(["L",x+w-r2,y, "Q",x+w,y, x+w,y+r2]); //B
        array = array.concat(["L",x+w,y+h-r3, "Q",x+w,y+h, x+w-r3,y+h]); //C
        array = array.concat(["L",x+r4,y+h, "Q",x,y+h, x,y+h-r4, "Z"]); //D

        return this.path(array);
    };

    var paper = Raphael("canvas", 840, 480);

    paper.roundedRectangle(10, 10, 80, 80, 0, 10, 25, 5).attr({fill: "#f00"});
}

Online example

If you don’t want to use Raphael and you don’t want neither to understand how svg path is working, use this function to generate the path corresponding to the corner rounded rectangle:

function p(x,y){
  return x+" "+y+" ";
}

function rectangle(x, y, w, h, r1, r2, r3, r4){
  var strPath = "M"+p(x+r1,y); //A
  strPath+="L"+p(x+w-r2,y)+"Q"+p(x+w,y)+p(x+w,y+r2); //B
  strPath+="L"+p(x+w,y+h-r3)+"Q"+p(x+w,y+h)+p(x+w-r3,y+h); //C
  strPath+="L"+p(x+r4,y+h)+"Q"+p(x,y+h)+p(x,y+h-r4); //D
  strPath+="L"+p(x,y+r1)+"Q"+p(x,y)+p(x+r1,y); //A
  strPath+="Z";

  return strPath;
}

Google Chrome extension: Store your Ryanair user’s preferences

2011-04-26T15:11:18+00:00

Download the google chrome extension.

This extension allows you to save time when booking a Ryanair ticket by:

storing you preferences (Firstname, Lastname, address, phone number, etc)
pre-filling the forms to avoid paying extra charges (No bags, No insurances, No text messages, etc)

You can change you preferences (which will be set automatically the first time you buy a ticket whis the extension enable) by clicking on the icon which appear when you are on ryanair website.

Developers:
Download source code : ryanair_preferences
This extension uses:

content script injection (when the page is changed)
localStorage
input value and localStorage mapping
option page