Il documento discute il framework Symfony2, evidenziando l'importanza della collaborazione e della responsabilità reciproca nello sviluppo di bundle che forniscano valore ai clienti. Viene descritto il concetto di 'bundle' come una struttura ben definita utilizzata per organizzare classi e risorse, e si sottolinea l'importanza dei test nel processo di sviluppo per evitare codice disordinato. Inoltre, viene menzionata la necessità di creare contenuti multilingue aggiornabili nelle applicazioni web.

1. Symfony2, creare bundle e valore
per il cliente
Leonardo Proietti
@_leopro_
Symfony day
Torino, 5 ottobre 2012

3. valore per il cliente = benefici / costi

4. collaborazione

5. collaborazione
responsabilità

6. collaborazione
responsabilità
reciproca soddisfazione

7. Il processo di sviluppo basato sulla
collaborazione, sulla reciproca soddisfazione e
sul senso di responsabilità permette di ottenere
un alto valore per il cliente.

8. bundle = è una cartella con una struttura ben
definita, che può ospitare qualsiasi cosa, dalle
classi ai controllori e alle risorse web
http://symfony.com/it/doc/current/cookbook/bundles/best_practices.html

9. bundle = uno spazio dei nomi di PHP ovvero un
namespace, con con una classe Bundle
http://symfony.com/it/doc/current/cookbook/bundles/best_practices.html

10. bundle = una libreria sufficientemente astratta
da essere utilizzata in contesti diversi tra loro

11. la realizzazione di un bundle non è valore
per il cliente

12. Richiesta
un sito web con contenuti aggiornabili
disponibili in diverse lingue

13. Analisi
gli strumenti esistenti sono valutati come non
adatti

14. Idea
relazione uno-a-molti, DIC, eventi

15. Sarà una libreria riutilizzabile?

16. Sarà una libreria riutilizzabile?
Non è importante perchè l'obiettivo principale è
produrre valore per il cliente

17. Ma non vogliamo spaghetti code

18. Test Driven Development
ovvero sviluppare guidati dai test

19. Test Driven Development
ovvero sviluppi meglio, vivi meglio

20. $article->getTitle();
/it/{article}
“Il mio articolo”
/en/{article}
“My article”

21. Acme
CoreBundle
Listener
LocaleListener.php
EntityListener.php
AnotherListener.php
Locale
Locale.php
LocaleInterface.php
Model
Translatable.php
TranslatableInterface.php
TranslatingInterface.php
AnotherModelUtil.php
Tests
...

22. Acme
CoreBundle
Listener
LocaleListener.php
EntityListener.php
AnotherListener.php
Locale
Locale.php
LocaleInterface.php
Model
Translatable.php
TranslatableInterface.php
TranslatingInterface.php
AnotherModelUtil.php
Tests
...

23. interface LocaleInterface
{
function setLocale($locale);
function getLocale();
function getDefaultLocale();
}

24. use AcmeCoreBundleModelTranslatingInterface;
use AcmeCoreBundleLocaleLocaleInterface;
interface TranslatableInterface
{
function addTranslation(TranslatingInterface $translation);
function getTranslations();
function setLocale(LocaleInterface $locale);
}

25. use AcmeCoreBundleModelTranslatableInterface;
interface TranslatingInterface
{
function setTranslatable(TranslatableInterface $translatable);
function getLocale();
function setLocale($string);
}

26. class Article
{
/**
* @ORMOneToMany
* (targetEntity="ArticleI18n", mappedBy="translatable")
*/
protected $translations;
public function getTitle()
{
return $this->getTranslation()->getTitle();
}
}

27. class Article
{
/**
* @ORMOneToMany
* (targetEntity="ArticleI18n", mappedBy="translatable")
*/
protected $translations;
public function getTitle()
{
return $this->getTranslation()->getTitle();
}
}

28. class ArticleI18n
{
/**
* @ORMManyToOne(targetEntity="Article", inversedBy="translations"
* @ORMJoinColumn(name="article_id", referencedColumnName="id")
*/
protected $translatable;
/**
* @ORMColumn(type="string", length=128)
*/
private $title;
public function getTitle()
{
return $this->title;
}
}

29. Symfony2
kernel.request

30. public function testOnKernelRequest()
{
//SymfonyComponentHttpKernelEventGetResponseEvent
$this->event->expects($this->once()
->method('getRequest')
->will($this->returnValue($this->request));
//SymfonyComponentHttpFoundationRequest
$this->request->expects($this->once())
->method('getLocale')
->will($this->returnValue('en'));
//AcmeCoreBundleLocaleLocaleInterface
$this->locale->expects($this->once())
->method('setLocale')
->with('en');
//AcmeCoreBundleListenerLocaleListener
$this->listener = new LocaleListener($this->locale);
$this->listener->onKernelRequest($this->event);
}

31. public function testOnKernelRequest()
{
//SymfonyComponentHttpKernelEventGetResponseEvent
$this->event->expects($this->once()
->method('getRequest')
->will($this->returnValue($this->request));
//SymfonyComponentHttpFoundationRequest
$this->request->expects($this->once())
->method('getLocale')
->will($this->returnValue('en'));
//AcmeCoreBundleLocaleLocaleInterface
$this->locale->expects($this->once())
->method('setLocale')
->with('en');
//AcmeCoreBundleListenerLocaleListener
$this->listener = new LocaleListener($this->locale);
$this->listener->onKernelRequest($this->event);
}

32. public function testOnKernelRequest()
{
//SymfonyComponentHttpKernelEventGetResponseEvent
$this->event->expects($this->once()
->method('getRequest')
->will($this->returnValue($this->request));
//SymfonyComponentHttpFoundationRequest
$this->request->expects($this->once())
->method('getLocale')
->will($this->returnValue('en'));
//AcmeCoreBundleLocaleLocaleInterface
$this->locale->expects($this->once())
->method('setLocale')
->with('en');
//AcmeCoreBundleListenerLocaleListener
$this->listener = new LocaleListener($this->locale);
$this->listener->onKernelRequest($this->event);
}

33. public function testOnKernelRequest()
{
//SymfonyComponentHttpKernelEventGetResponseEvent
$this->event->expects($this->once()
->method('getRequest')
->will($this->returnValue($this->request));
//SymfonyComponentHttpFoundationRequest
$this->request->expects($this->once())
->method('getLocale')
->will($this->returnValue('en'));
//AcmeCoreBundleLocaleLocaleInterface
$this->locale->expects($this->once())
->method('setLocale')
->with('en');
//AcmeCoreBundleListenerLocaleListener
$this->listener = new LocaleListener($this->locale);
$this->listener->onKernelRequest($this->event);
}

34. public function testOnKernelRequest()
{
//SymfonyComponentHttpKernelEventGetResponseEvent
$this->event->expects($this->once()
->method('getRequest')
->will($this->returnValue($this->request));
//SymfonyComponentHttpFoundationRequest
$this->request->expects($this->once())
->method('getLocale')
->will($this->returnValue('en'));
//AcmeCoreBundleLocaleLocaleInterface
$this->locale->expects($this->once())
->method('setLocale')
->with('en');
//AcmeCoreBundleListenerLocaleListener
$this->listener = new LocaleListener($this->locale);
$this->listener->onKernelRequest($this->event);
}

35. public function testOnKernelRequest()
{
//SymfonyComponentHttpKernelEventGetResponseEvent
$this->event->expects($this->once()
->method('getRequest')
->will($this->returnValue($this->request));
//SymfonyComponentHttpFoundationRequest
$this->request->expects($this->once())
->method('getLocale')
->will($this->returnValue('en'));
//AcmeCoreBundleLocaleLocaleInterface
$this->locale->expects($this->once())
->method('setLocale')
->with('en');
//AcmeCoreBundleListenerLocaleListener
$this->listener = new LocaleListener($this->locale);
$this->listener->onKernelRequest($this->event);
}

36. public function testOnKernelRequest()
{
//SymfonyComponentHttpKernelEventGetResponseEvent
$this->event->expects($this->once()
->method('getRequest')
->will($this->returnValue($this->request));
//SymfonyComponentHttpFoundationRequest
$this->request->expects($this->once())
->method('getLocale')
->will($this->returnValue('en'));
//AcmeCoreBundleLocaleLocaleInterface
$this->locale->expects($this->once())
->method('setLocale')
->with('en');
//AcmeCoreBundleListenerLocaleListener
$this->listener = new LocaleListener($this->locale);
$this->listener->onKernelRequest($this->event);
}

37. public function testOnKernelRequest()
{
//SymfonyComponentHttpKernelEventGetResponseEvent
$this->event->expects($this->once()
->method('getRequest')
->will($this->returnValue($this->request));
//SymfonyComponentHttpFoundationRequest
$this->request->expects($this->once())
->method('getLocale')
->will($this->returnValue('en'));
//AcmeCoreBundleLocaleLocaleInterface
$this->locale->expects($this->once())
->method('setLocale')
->with('en');
//AcmeCoreBundleListenerLocaleListener
$this->listener = new LocaleListener($this->locale);
$this->listener->onKernelRequest($this->event);
}

38. public function testOnKernelRequest()
{
//SymfonyComponentHttpKernelEventGetResponseEvent
$this->event->expects($this->once()
->method('getRequest')
->will($this->returnValue($this->request));
//SymfonyComponentHttpFoundationRequest
$this->request->expects($this->once())
->method('getLocale')
->will($this->returnValue('en'));
//AcmeCoreBundleLocaleLocaleInterface
$this->locale->expects($this->once())
->method('setLocale')
->with('en');
//AcmeCoreBundleListenerLocaleListener
$this->listener = new LocaleListener($this->locale);
$this->listener->onKernelRequest($this->event);
}

39. Doctrine2
postLoad

40. public function testPostLoad()
{
//AcmeCoreBundleLocaleLocaleInterface
$this->locale;
//DoctrineORMEventLifecycleEventArgs
$this->args->expects($this->once())
->method('getEntity')
->will($this->returnValue($this->entity));
//AcmeCoreBundleModelTranslatableInterface
$this->entity->expects($this->once())
->method('setLocale')
->with($this->locale);
//AcmeCoreBundleListenerEntityListener
$this->listener = new TranslatableListener($this->locale);
$this->listener->postLoad($this->event);
}

41. public function testPostLoad()
{
//AcmeCoreBundleLocaleLocaleInterface
$this->locale;
//DoctrineORMEventLifecycleEventArgs
$this->args->expects($this->once())
->method('getEntity')
->will($this->returnValue($this->entity));
//AcmeCoreBundleModelTranslatableInterface
$this->entity->expects($this->once())
->method('setLocale')
->with($this->locale);
//AcmeCoreBundleListenerEntityListener
$this->listener = new TranslatableListener($this->locale);
$this->listener->postLoad($this->event);
}

42. public function testPostLoad()
{
//AcmeCoreBundleLocaleLocaleInterface
$this->locale;
//DoctrineORMEventLifecycleEventArgs
$this->args->expects($this->once())
->method('getEntity')
->will($this->returnValue($this->entity));
//AcmeCoreBundleModelTranslatableInterface
$this->entity->expects($this->once())
->method('setLocale')
->with($this->locale);
//AcmeCoreBundleListenerEntityListener
$this->listener = new TranslatableListener($this->locale);
$this->listener->postLoad($this->event);
}

43. public function testPostLoad()
{
//AcmeCoreBundleLocaleLocaleInterface
$this->locale;
//DoctrineORMEventLifecycleEventArgs
$this->args->expects($this->once())
->method('getEntity')
->will($this->returnValue($this->entity));
//AcmeCoreBundleModelTranslatableInterface
$this->entity->expects($this->once())
->method('setLocale')
->with($this->locale);
//AcmeCoreBundleListenerEntityListener
$this->listener = new TranslatableListener($this->locale);
$this->listener->postLoad($this->event);
}

44. public function testPostLoad()
{
//AcmeCoreBundleLocaleLocaleInterface
$this->locale;
//DoctrineORMEventLifecycleEventArgs
$this->args->expects($this->once())
->method('getEntity')
->will($this->returnValue($this->entity));
//AcmeCoreBundleModelTranslatableInterface
$this->entity->expects($this->once())
->method('setLocale')
->with($this->locale);
//AcmeCoreBundleListenerEntityListener
$this->listener = new TranslatableListener($this->locale);
$this->listener->postLoad($this->event);
}

45. public function testPostLoad()
{
//AcmeCoreBundleLocaleLocaleInterface
$this->locale;
//DoctrineORMEventLifecycleEventArgs
$this->args->expects($this->once())
->method('getEntity')
->will($this->returnValue($this->entity));
//AcmeCoreBundleModelTranslatableInterface
$this->entity->expects($this->once())
->method('setLocale')
->with($this->locale);
//AcmeCoreBundleListenerEntityListener
$this->listener = new TranslatableListener($this->locale);
$this->listener->postLoad($this->event);
}

46. //tranlsations, defaultLocale, locale, tranlsationExpected
public function getTranslationProvider()
{
return array(
array(
array('it' => 'translationIt', 'en' => 'translationEn'),
'en',
'en',
'translationEn'),
array(
array('en' => 'translationEn', 'it' => 'translationIt'),
'en',
'it',
'translationIt'),
array(
array('en' => 'translationEn'),
'en',
'it',
'translationEn'),
)
}

47. //tranlsations, defaultLocale, locale, tranlsationExpected
public function getTranslationProvider()
{
return array(
array(
array('it' => 'translationIt', 'en' => 'translationEn'),
'en',
'en',
'translationEn'),
array(
array('en' => 'translationEn', 'it' => 'translationIt'),
'en',
'it',
'translationIt'),
array(
array('en' => 'translationEn'),
'en',
'it',
'translationEn'),
)
}

48. //tranlsations, defaultLocale, locale, tranlsationExpected
public function getTranslationProvider()
{
return array(
array(
array('it' => 'translationIt', 'en' => 'translationEn'),
'en',
'en',
'translationEn'),
array(
array('en' => 'translationEn', 'it' => 'translationIt'),
'en',
'it',
'translationIt'),
array(
array('en' => 'translationEn'),
'en',
'it',
'translationEn'),
)
}

49. //tranlsations, defaultLocale, locale, tranlsationExpected
public function getTranslationProvider()
{
return array(
array(
array('it' => 'translationIt', 'en' => 'translationEn'),
'en',
'en',
'translationEn'),
array(
array('en' => 'translationEn', 'it' => 'translationIt'),
'en',
'it',
'translationIt'),
array(
array('en' => 'translationEn'),
'en',
'it',
'translationEn'),
)
}

50. public function testGetTranslation($translations, $defaultLocale, $locale,
$translationExpected)
{
$this->translatable = new Translatable();
$this->translatable->setLocale($this->locale);
foreach ($translations as $language => $translation) {
$this->$translation->expects($this->exactly(2))->method('getLocale')
->will($this->returnValue($language));
$this->translatable->addTranslation($this->$translation);
}
$this->locale->expects($this->exactly(1))
->method('getDefaultLocale')
->will($this->returnValue($defaultLocale));
$this->locale->expects($this->exactly(1))
->method('getLocale')
->will($this->returnValue($locale));
$result = $this->translatable->getTranslation();
$this->assertEquals($this->$translationExpected, $result);
}

51. public function testGetTranslation($translations, $defaultLocale, $locale,
$translationExpected)
{
$this->translatable = new Translatable();
$this->translatable->setLocale($this->locale);
foreach ($translations as $language => $translation) {
$this->$translation->expects($this->exactly(2))->method('getLocale')
->will($this->returnValue($language));
$this->translatable->addTranslation($this->$translation);
}
$this->locale->expects($this->exactly(1))
->method('getDefaultLocale')
->will($this->returnValue($defaultLocale));
$this->locale->expects($this->exactly(1))
->method('getLocale')
->will($this->returnValue($locale));
$result = $this->translatable->getTranslation();
$this->assertEquals($this->$translationExpected, $result);
}

52. Non resta che soddisfare i test scrivendo del
codice funzionante :-)

53. configuriamo i servizi
//src/Acme/CoreBundle/Resources/config/services.yml
services:
acme_core.locale:
class: AcmeCoreBundleServiceLocale
arguments: [%locale%]
acme_core.listener.locale:
class: AcmeCoreBundleServiceLocaleListener
arguments: ["@acme.core.locale"]
tags:
- { name: kernel.event_listener, event: kernel.request }
acme_core.listener.entity:
class: AcmeCoreBundleServiceEntityListener
arguments: ["@acme.core.locale"]
tags:
- { name: doctrine.event_listener, event: postLoad }

54. configuriamo i servizi
//src/Acme/CoreBundle/Resources/config/services.yml
services:
acme_core.locale:
class: AcmeCoreBundleServiceLocale
arguments: [%locale%]
acme_core.listener.locale:
class: AcmeCoreBundleServiceLocaleListener
arguments: ["@acme.core.locale"]
tags:
- { name: kernel.event_listener, event: kernel.request }
acme_core.listener.entity:
class: AcmeCoreBundleServiceEntityListener
arguments: ["@acme.core.locale"]
tags:
- { name: doctrine.event_listener, event: postLoad }

55. class Article extends Translatable
{
/**
* @ORMOneToMany
* (targetEntity="ArticleI18n", mappedBy="translatable")
*/
protected $translations;
public function getTitle()
{
return $this->getTranslation()->getTitle();
}
}

56. Una volta testata anche l'integrazione e
verificato che la richiesta del cliente è stata
soddisfatta, abbiamo prodotto il valore richiesto
e ci possiamo fermare.

57. Nuovo cliente, stessa richiesta

58. Prendiamo il codice e lo isoliamo
PUGX/I18nBundle

59. AcmePlus
PUGX
I18nBundle
Listener
LocaleListener.php
EntityListener.php
Locale
Locale.php
LocaleInterface.php
Model
Translatable.php
TranslatableInterface.php
TranslatingInterface.php
Tests

60. Il grosso è fatto, ora dovremo:
- esporre una configurazione semantica
- gestire le dipendenze (composer) e la configurazione dei test
- aggiungere la documentazione, la licenza ecc.

61. AcmePlus
PUGX
I18nBundle
DependencyInjection
Configuration.php
PUGXI18nExtension.php
[…]
Tests
bootstrap.php
PUGXI18nBundle.php
composer.json
phpunit.xml.dist

62. namespace PUGXI18nBundle;
use SymfonyComponentHttpKernelBundleBundle;
use PUGXI18nBundleDependencyInjectionPUGXI18nExtension;
class PUGXI18nBundle extends Bundle
{
public function getContainerExtension()
{
return new PUGXI18nExtension();
}
}

63. namespace PUGXI18nBundleDependencyInjection;
use SymfonyComponentConfigDefinitionBuilderTreeBuilder;
use SymfonyComponentConfigDefinitionConfigurationInterface;
class Configuration implements ConfigurationInterface
{
public function getConfigTreeBuilder()
{
$treeBuilder = new TreeBuilder();
$rootNode = $treeBuilder->root('pugx_i18n');
return $treeBuilder;
}
}

64. namespace PUGXI18nBundleDependencyInjection;
use SymfonyComponentDependencyInjectionContainerBuilder;
use SymfonyComponentConfigFileLocator;
use SymfonyComponentHttpKernelDependencyInjectionExtension;
use SymfonyComponentDependencyInjectionLoaderYamlFileLoader;
class PUGXI18nExtension implements Extension
{
public function load(array $configs, ContainerBuilder $container)
{
$configuration = new Configuration();
$config = $this->processConfiguration($configuration, $configs);
$path = __DIR__.'/../Resources/config'
$loader = new YamlFileLoader($container, new FileLocator($path));
$loader->load('services.yml');
}
public function getAlias()
{
return 'pugx_i18n';
}
}

65. Composer
gestisce le dipendenze

66. //src/PUGX/I18nBundle/composer.json
{
"name": "pugx/i18n-bundle",
"type": "symfony-bundle",
"description": "Manage i18n",
"keywords": ["symfony2, i18n, translation"],
"license": "MIT",
"authors": [
{
"name":"Leonardo Proietti",
"email":"leonardo.proietti@gmail.com"
}
],
"minimum-stability": "dev",
"require": {
"php": ">=5.3.2",
"symfony/framework-bundle": "2.1.*",
"doctrine/orm": ">=2.2.3,<2.4-dev",
"symfony/yaml": "2.1.*"
},
"autoload": {
"psr-0": { "PUGXI18nBundle": "" }
},
"target-dir": "PUGX/I18nBundle"

67. //src/PUGX/I18nBundle/Tests/bootstrap.php
if (!is_file($autoloadFile = __DIR__.'/../vendor/autoload.php')) {
throw new LogicException('Could not find autoload.php');
}
require $autoloadFile;

68. //src/PUGX/I18nBundle/phpunit.xml.dist
<?xml version="1.0" encoding="UTF-8"?>
<phpunit bootstrap="./Tests/bootstrap.php">
<testsuites>
<testsuite name="PUGXI18nBundle test suite">
<directory suffix="Test.php">./Tests</directory>
</testsuite>
</testsuites>
<filter>
<whitelist>
<directory>./</directory>
<exclude>
<directory>./Resources</directory>
<directory>./Tests</directory>
</exclude>
</whitelist>
</filter>
</phpunit>

69. Servizio rivolto alla comunità open source per
la continuos integration di progetti pubblicati su
github
https://travis-ci.org/

70. //src/PUGX/I18nBundle/.travis.yml
language: php
php:
- 5.3
- 5.4
before_script:
- curl -s http://getcomposer.org/installer | php
- php composer.phar install –dev

71. Ora basta creare un repository su github e
avremo dato il nostro piccolo contributo alla
comunità open source.

72. Credits
symfony.com/it/doc/2.0/book/internals.html
symfony.com/it/doc/2.0/cookbook/bundles/best_practices.html
symfony.com/it/doc/2.0/cookbook/bundles/extension.html
sviluppoagile.it
PUG Roma

73. GRAZIE :-)