Dayuse.com - Challenges to Scale an Innovative Worldwide Business

Dayuse.com is an international market place helping hoteliers to sell their empty room and spaces during the day to maximize their revenues. Founded 9 years ago by David Lebée when he was managing a boutique hotel in Paris, Dayuse.com now operates in more than 20 countries in the world with more than 5,000 partner hotels. In order to scale the business and remaining the main leader on this market, Dayuse.com is continuously facing technical challenges to keep innovating and opening new markets. This talk will be a return of experience of the many challenges we face and how the tech team help other departments (sales, marketing, customer support, etc.) building their tools.

Transcript

1. Dayuse.com 

   Challenges to scale an innovative
   worldwide business
   SymfonyLive 2019 / Sept. 26th / Berlin / Germany
   

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2. Hugo Hamon
   

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3. https://speakerdeck.com/hhamon
   

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4. Introduction
   0
   

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6. 70 people based
   in Paris, USA &
   Hong-Kong
   

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7. +5 000 hotels
   +1M bookings
   25 countries
   

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8. Main Challenges of 2018/2019
   •Securing the technical stack
   •Improving the user experience
   •Aggregating more business data
   •Making billing more reliable
   •Becoming more agile!
   

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9. Securing the
   Technical Stack
   1
   

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10. PHP 5.6 -> PHP 7.2
    Symfony 2.6 -> 3.4
    

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11. Exceptions Logging with Sentry.io
    

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12. DI & Autowiring
    services:
    _defaults:
    autowire: true
    autoconfigure: true
    public: false
    bind:
    $mailer: '@app.mailer'
    $defaultCurrencyCode: '%default.currency.code%'
    $defaultCurrencyRateFactor: '%default.currency_rate.factor%'
    $commandBus: '@legacy_command_bus'
    $filesystemMap: '@knp_gaufrette.filesystem_map'
    $staticCanonicalDomain: '%domains.static.canonical_domain%'
    Dayuse\Bundle\FrontBundle\Controller\:
    resource: '../../src/Dayuse/Bundle/FrontBundle/Controller'
    public: true
    tags: ['controller.service_arguments']
    Dayuse\Service\ContentCachePool:
    alias: 'Dayuse\Service\CacheService'
    # ...
    

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13. // ...
    use Dayuse\Service\ContentCachePool;
    class CachedFooterRenderer implements FooterBlockRenderer
    {
    // ...
    public function __construct(
    FooterBlockRenderer $renderer,
    LanguageRepository $languageRepository,
    ContentCachePool $cache,
    int $ttl = self::DEFAULT_TTL
    ) {
    // ...
    }
    }
    

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14. Assertions Usage
    final class GeoHash
    {
    // ...
    private static function fromArray(array $payload, string $issuer): self
    {
    Assertion::keyExists($payload, 'lat', 'Payload is missing a "lat" (latitude) key.');
    Assertion::keyExists($payload, 'lng', 'Payload is missing a "lng" (longitude) key.');
    Assertion::keyExists($payload, 't', 'Payload is missing a "t" (type) key.');
    Assertion::keyExists($payload, 'p', 'Payload is missing a "p" (provider) key.');
    Assertion::numeric($payload['lat'], 'The "lat" key must contain a valid numeric value.');
    Assertion::numeric($payload['lng'], 'The "lng" key must contain a valid numeric value.');
    Assertion::notEmpty($payload['p'], 'The "p" key must contain a non empty string.');
    Assertion::inArray($payload['t'], AddressComponents::TYPES);
    return new self($payload['lat'], $payload['lng'], $payload['t'], $payload['p'], $issuer);
    }
    }
    

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15. •Country
    •DateRange
    •DateTimeRange
    •Email
    •Money
    •PriceRange
    •Time
    •TimeSlot
    •etc.
    Value
    Objects
    

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16. final class DateRange implements \IteratorAggregate
    {
    private $from;
    private $until;
    public static function between(string $from, string $to): self
    {
    return new self(
    new \DateTimeImmutable(date('Y-m-d', strtotime($from))),
    new \DateTimeImmutable(date('Y-m-d', strtotime($to)))
    );
    }
    

    // ...
    public function toListOfDates(string $format = 'Y-m-d', bool $appendEndDate = true): array
    {
    $dates = [];
    foreach ($this->getDays() as $day) {
    $dates[] = $day->format($format);
    }
    $endDate = $this->until->format($format);
    if ($appendEndDate && !\in_array($endDate, $dates, true)) {
    $dates[] = $endDate;
    }
    return $dates;
    }
    }
    

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17. class RoomSlotRepository extends ServiceEntityRepository
    {
    // ...
    public function getAvailabilities(Room $room, DateRange $dates): array
    {
    $query = $this->createQueryBuilder('s');
    return $query
    ->andWhere('s.roomId = :roomId')
    ->setParameter('roomId', $room->getId())
    ->andWhere($query->expr()->in('s.date', ':dates'))
    ->setParameter('dates', $dates->toListOfDates())
    ->orderBy('s.date', 'ASC')
    ->getQuery()
    ->useQueryCache(true)
    ->execute()
    ;
    }
    }
    

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18. Custom
    Collections
    

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19. class RoomAvailabilityService
    {
    // ...
    public function generateRoomAvailabilities(Room $room, DateRange $period): void
    {
    // ...
    $roomSlotList = $this->roomSlotRepository->findRoomSlotByPeriod($room, $period);
    // ...
    foreach ($availabilityPeriod as $date) {
    if ($roomSlot = $this->getRoomSlotScheduledOn($roomSlotList, $date)) {
    continue;
    }
    // ...
    }
    // ...
    }
    private function getRoomSlotScheduledOn(array $list, \DateTimeInterface $currentDate): ?RoomSlot
    {
    foreach ($list as $item) {
    if ($item->isScheduledOn($currentDate)) {
    return $item;
    }
    }
    return null;
    }
    }
    

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20. final class RoomAvailabilityList implements \IteratorAggregate, \Countable
    {
    private $items;
    public function __construct(array $items = [])
    {
    Assertion::allIsInstanceOf($items, RoomSlot::class);
    $this->items = new ArrayCollection($items);
    }
    public function getAvailabilityScheduledOn(\DateTimeInterface $date): ?RoomSlot
    {
    /** @var RoomSlot $item */
    foreach ($this->items as $item) {
    if ($item->isScheduledOn($date)) {
    return $item;
    }
    }
    return null;
    }
    // ...
    }
    

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21. class RoomAvailabilityService
    {
    // ...
    public function generateRoomAvailabilities(Room $room, DateRange $period): void
    {
    // ...
    $slots = $this->roomSlotRepository->findRoomSlotByPeriod($room, $period);
    $availabilities = new RoomAvailabilityList($slot);
    // ...
    foreach ($period as $date) {
    if ($roomSlot = $availabilities->getAvailabilityScheduledOn($date)) {
    continue;
    }
    // ...
    }
    // ...
    }
    }
    

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22. Gitlab CI + Quality Check Pipeline
    

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23. use Symfony\Component\Panther\Client;
    use PHPUnit\Framework\TestCase;
    final class AnonymousBookingTest extends TestCase
    {
    private $client;
    protected function setUp()
    {
    $this->client = Client::createChromeClient(null, ['...'], [], 'https://fr.www.dayuse.test');
    }
    public function testAnonymousBookingWithoutOptions(): void
    {
    $tomorrow = date('Y-m-d', strtotime('now +1 day');
    $crawler = $this->client->request('GET', '/hotels/france/7hotel-fitness?check_in_date='. $tomorow);
    $this->assertContains(
    '7Hôtel & Fitness, Illkirch-Graffenstaden : -48% en journée - Dayuse.test',
    $crawler->filter('title')->html()
    );
    $this->client->clickLink("J'accepte");
    $crawler = $this->client->refreshCrawler();
    $this->assertContains('Chambre double superieure', $crawler->filter('p.room_style')->html());
    $crawler->filter('a.selectRoomForm_101589_btn-form')->click();
    $this->client->waitFor('form[name="information_to_be_transmitted"]');
    // ...
    }
    }
    

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24. Monitoring HTTP requests with redirection.io
    

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25. Developer Experience
    

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26. Improving the
    User Experience
    2
    

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27. Rebuilding the
    Search Engine
    

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31. Rebuilding the
    Booking
    Funnel
    

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32. ?
    

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40. src/Dayuse/Bundle/FrontBundle/Controller/Booking/
    ├── AbstractBookingAction.php
    ├── ReservationStepsAction.php
    ├── ReservationSummaryAction.php
    ├── Step1/
    │ ├── ReservationOptionsAction.php
    │ └── UpdateOptionsAction.php
    ├── Step2/
    │ ├── BlacklistAction.php
    │ └── InformationToBeTransmittedToHotelAction.php
    ├── Step3/
    │ ├── AnonymousReservationAction.php
    │ ├── AnonymousReservationEmailCheckerAction.php
    │ ├── Confirmation/
    │ │ ├── ...
    │ │ └── SmsConfirmationAction.php
    │ ├── LoginAction.php
    │ ├── Password/
    │ │ ├── ForgotPasswordAction.php
    │ │ └── ResetPasswordAction.php
    │ └── ReservationModeAction.php
    ├── Step4/
    │ ├── CreditCardPreAuthAction.php
    │ └── ValidatePreAuthAction.php
    └── Step5/
    ├── ConfirmationAction.php
    └── SendSmsConfirmation.php
    Split a 2K LOC
    BookingController class
    into several action classes.
    1 action = 1 class
    Actions are services
    

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41. Split a 2K LOC
    BookingController class
    into several action classes.
    1 action = 1 class
    Leverage DI
    final class ConfirmationAction extends AbstractBookingAction
    {
    /** @Route("/confirmation") */
    public function __invoke(Request $request): Response
    {
    // ...
    $reservation = $this->loadReservation($bookingRequest->getReservationId());
    $language = $this->visitorLocalizationConfiguration->getLanguage();
    $hotel = $this->hotelRepository->getHotelById($reservation->getHotel()->getId());
    $bookingRequestViewModelData = $this->bookingRequestViewModelBuilder->getViewData($bookingRequest);
    return new Response(
    $this->engine->render('@DayuseFront/booking/step5/confirmation.html.twig',
    array_merge($bookingRequestViewModelData, [
    'reservationData' => $this->reservationConverter->exposeEntity(
    $reservation,
    $language,
    $this->visitorLocalizationConfiguration->getCurrency()
    ),
    'willCollectTax' => $hotel->willCollectLocalSalesTax(),
    'hotelPostalCode' => $hotel->getZipCode(),
    'hotelCountryCode' => $hotel->getCountryCode(),
    'customer' => $this->loadCurrentCustomer($bookingRequest),
    'taxInformation' => $this->hotelContentService->getDefaultTaxInformation($hotel, $language),
    'defaultConditions' => $this->hotelContentService->getDefaultConditions($hotel, $language),
    ]))
    );
    }
    }
    

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42. Reservations with a filled ETA
    June 20th 2019
    

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43. Reservations made with a registered account
    June 20th 2019
    

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44. Transactional
    Emails
    

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47. # app/config/config.yml
    swiftmailer:
    # default or failover
    default_mailer: ‘%default_mailer%'
    mailers:
    # Mandrillapp
    default:
    transport: smtp
    host: '%mailer.default.smtp.host%'
    username: '%mailer.default.smtp.user%'
    password: '%mailer.default.smtp.password%'
    port: '%mailer.default.smtp.port%'
    encryption: '%mailer.default.smtp.encryption%'
    delivery_addresses: '%mailer.delivery_addresses%'
    disable_delivery: ‘%mailer.disable_delivery%'
    # Amazon SES
    failover:
    transport: smtp
    host: '%mailer.failover.smtp.host%'
    username: '%mailer.failover.smtp.user%'
    password: '%mailer.failover.smtp.password%'
    port: '%mailer.failover.smtp.port%'
    encryption: '%mailer.failover.smtp.encryption%'
    delivery_addresses: '%mailer.delivery_addresses%'
    disable_delivery: '%mailer.disable_delivery%'
    

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48. I18N & L10N
    

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49. Dates, Times and Timezones
    1. Ensure all your services run on UTC
    2. Store ISO timezones names, not offsets
    3. Use MySQL date & times functions
    

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50. Clock Mocking
    class ReservationPaymentTransaction
    {
    // ...
    public function capture(): void
    {
    Ensure::true($this->isCapturable());
    $this->capturedAt = \DateTimeImmutable::createFromFormat('U', time());
    $this->status = self::STATUS_CAPTURED;
    $this->markUpdated();
    }
    }
    

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51. Clock Mocking
    final class ReservationPaymentTransactionTest extends TestCase
    {
    // ...
    public function testCannotCaptureExpiredPreauthorizedPayment(): void
    {
    ClockMock::register(ReservationPaymentTransaction::class);
    ClockMock::withClockMock(strtotime('2019-08-02 10:34:56'));
    $authorizedAt = new \DateTimeImmutable('2019-07-25 11:10:30');
    $transaction = $this->initiatePaymentTransaction(Money::EUR(300), '2019-07-25 11:10:12');
    $transaction->authorize('pm_1F41UtAKwwJlXkiKw3z6ZFKj', $authorizedAt);
    $this->expectException(EnsureFailedException::class);
    $this->expectExceptionMessage('Reservation payment transaction is not capturable.');
    $transaction->capture();
    }
    }
    

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52. MySQL ConvertTZ Function
    SELECT
    id,
    name,
    timezone,
    DATE_FORMAT(NOW(), '%Y-%m-%d %H:%i:%s') AS utc_time,
    DATE_FORMAT(CONVERT_TZ(NOW(), 'UTC', timezone), '%Y-%m-%d %H:%i:%s') AS hotel_time
    FROM tbl_hotel
    ORDER BY id DESC
    LIMIT 100;
    

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53. +-------+-----------------------------------------------------------+---------------------+---------------------+---------------------+
    | id | name | timezone | utc_time | hotel_time |
    +-------+-----------------------------------------------------------+---------------------+---------------------+---------------------+
    | 11685 | Boutique Hotel Anahi | Europe/Rome | 2019-09-08 17:37:25 | 2019-09-08 19:37:25 |
    | 11684 | Hyatt Centric The Pike Long Beach | America/Los_Angeles | 2019-09-08 17:37:25 | 2019-09-08 10:37:25 |
    | 11682 | Hotel Konsul Bonn | Europe/Berlin | 2019-09-08 17:37:25 | 2019-09-08 19:37:25 |
    | 11681 | Hallmark Hotel the Welcombe | Europe/London | 2019-09-08 17:37:25 | 2019-09-08 18:37:25 |
    | 11680 | Hotel Le Mount Stephen | America/Toronto | 2019-09-08 17:37:25 | 2019-09-08 13:37:25 |
    | 11679 | Maritim Hotel Köln | Europe/Berlin | 2019-09-08 17:37:25 | 2019-09-08 19:37:25 |
    | 11678 | Mantra Epping | Australia/Melbourne | 2019-09-08 17:37:25 | 2019-09-09 03:37:25 |
    | 11677 | Hôtel Saint-Christophe | Europe/Paris | 2019-09-08 17:37:25 | 2019-09-08 19:37:25 |
    | 11671 | Holiday Inn Express & Suites Austin NE - Hutto | America/Chicago | 2019-09-08 17:37:25 | 2019-09-08 12:37:25 |
    | 11670 | Hyatt Regency Crystal City At Reagan National Airport | America/New_York | 2019-09-08 17:37:25 | 2019-09-08 13:37:25 |
    | 11669 | Mont Gabriel Resort & Spa | America/Toronto | 2019-09-08 17:37:25 | 2019-09-08 13:37:25 |
    | 11668 | Ocean Sky Hotel & Resort Fort Lauderdale Beach | America/New_York | 2019-09-08 17:37:25 | 2019-09-08 13:37:25 |
    | 11667 | Le Nouvel Hotel & Spa | America/Toronto | 2019-09-08 17:37:25 | 2019-09-08 13:37:25 |
    | 11666 | LE TSUBA HOTEL | Europe/Paris | 2019-09-08 17:37:25 | 2019-09-08 19:37:25 |
    | 11665 | Aloft Miami Dadeland | America/New_York | 2019-09-08 17:37:25 | 2019-09-08 13:37:25 |
    | 11664 | Quality Suites San Diego SeaWorld Area | America/Los_Angeles | 2019-09-08 17:37:25 | 2019-09-08 10:37:25 |
    | 11663 | The Volare, an Ascend Hotel Collection Member | America/Los_Angeles | 2019-09-08 17:37:25 | 2019-09-08 10:37:25 |
    | 11662 | Ten Square Hotel | Europe/London | 2019-09-08 17:37:25 | 2019-09-08 18:37:25 |
    | 11661 | Old West Lofts Downtown Tampa | America/New_York | 2019-09-08 17:37:25 | 2019-09-08 13:37:25 |
    | 11660 | Embassy Suites by Hilton Phoenix Airport | America/Phoenix | 2019-09-08 17:37:25 | 2019-09-08 10:37:25 |
    | 11659 | Harbour Bay Hotel | Asia/Hong_Kong | 2019-09-08 17:37:25 | 2019-09-09 01:37:25 |
    | 11650 | The Westin Dublin | Europe/Dublin | 2019-09-08 17:37:25 | 2019-09-08 18:37:25 |
    | 11649 | Hampton by Hilton Luton Airport | Europe/London | 2019-09-08 17:37:25 | 2019-09-08 18:37:25 |
    | 11612 | The Sukhothai Bangkok | Asia/Bangkok | 2019-09-08 17:37:25 | 2019-09-09 00:37:25 |
    | 11611 | Leonardo Hotel Weimar | Europe/Berlin | 2019-09-08 17:37:25 | 2019-09-08 19:37:25 |
    | 11610 | Leonardo Hotel Munich City East | Europe/Berlin | 2019-09-08 17:37:25 | 2019-09-08 19:37:25 |
    +-------+-----------------------------------------------------------+---------------------+---------------------+---------------------+
    

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54. Select hotels where local time is 1:00 AM
    SELECT
    id,
    name,
    timezone,
    DATE_FORMAT(NOW(), '%Y-%m-%d %H:%i:%s') AS utc_time,
    DATE_FORMAT(CONVERT_TZ(NOW(), 'UTC', timezone), '%Y-%m-%d %H:%i:%s') AS hotel_time
    FROM tbl_hotel
    WHERE HOUR(CONVERT_TZ(NOW(), 'UTC', timezone)) = 1
    ORDER BY id DESC
    LIMIT 100;
    

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55. +-------+----------------------------------------------------------------------+--------------+---------------------+---------------------+
    | id | name | timezone | utc_time | hotel_time |
    +-------+----------------------------------------------------------------------+--------------+---------------------+---------------------+
    | 11521 | Hotel Tranz | Asia/Bangkok | 2019-09-08 18:04:44 | 2019-09-09 01:04:44 |
    | 11522 | Avani Sukhumvit Bangkok | Asia/Bangkok | 2019-09-08 18:04:44 | 2019-09-09 01:04:44 |
    | 11292 | Adelphi Grande Sukhumvit | Asia/Bangkok | 2019-09-08 18:04:44 | 2019-09-09 01:04:44 |
    | 11553 | Dream Hotel Bangkok | Asia/Bangkok | 2019-09-08 18:04:44 | 2019-09-09 01:04:44 |
    | 11321 | Novotel Bangkok Suvarnabhumi Airport | Asia/Bangkok | 2019-09-08 18:04:44 | 2019-09-09 01:04:44 |
    | 11332 | Park Plaza Bangkok Soi 18 | Asia/Bangkok | 2019-09-08 18:04:44 | 2019-09-09 01:04:44 |
    | 11336 | Modena by Fraser Bangkok | Asia/Bangkok | 2019-09-08 18:04:44 | 2019-09-09 01:04:44 |
    | 11612 | The Sukhothai Bangkok | Asia/Bangkok | 2019-09-08 18:04:44 | 2019-09-09 01:04:44 |
    | 11364 | Radisson Blu Plaza Bangkok | Asia/Bangkok | 2019-09-08 18:04:44 | 2019-09-09 01:04:44 |
    | 11622 | Narai Hotel | Asia/Bangkok | 2019-09-08 18:04:44 | 2019-09-09 01:04:44 |
    | 11623 | Triple Two Silom | Asia/Bangkok | 2019-09-08 18:04:44 | 2019-09-09 01:04:44 |
    | 11386 | Amaranth Suvarnabhumi Airport, BW Premier Collection by Best Western | Asia/Bangkok | 2019-09-08 18:04:44 | 2019-09-09 01:04:44 |
    | 11387 | Dynasty Grande Hotel | Asia/Bangkok | 2019-09-08 18:04:44 | 2019-09-09 01:04:44 |
    | 11400 | Salil Hotel Sukhumvit Soi 11 | Asia/Bangkok | 2019-09-08 18:04:44 | 2019-09-09 01:04:44 |
    | 11423 | Summit Windmill Golf Residence | Asia/Bangkok | 2019-09-08 18:04:44 | 2019-09-09 01:04:44 |
    | 11446 | Golden Tulip Mandison Suites | Asia/Bangkok | 2019-09-08 18:04:44 | 2019-09-09 01:04:44 |
    | 11463 | Hilton Sukhumvit Bangkok | Asia/Bangkok | 2019-09-08 18:04:44 | 2019-09-09 01:04:44 |
    | 11476 | Travelodge Sukhumvit 11 | Asia/Bangkok | 2019-09-08 18:04:44 | 2019-09-09 01:04:44 |
    | 11477 | Eastin Thana City Golf Resort Bangkok | Asia/Bangkok | 2019-09-08 18:04:44 | 2019-09-09 01:04:44 |
    | 11478 | Eastin Hotel Makkasan Bangkok | Asia/Bangkok | 2019-09-08 18:04:44 | 2019-09-09 01:04:44 |
    | 11479 | Shanghai Mansion Bangkok Hotel | Asia/Bangkok | 2019-09-08 18:04:44 | 2019-09-09 01:04:44 |
    +-------+----------------------------------------------------------------------+--------------+---------------------+---------------------+
    21 rows in set (0.02 sec)
    

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56. Loco - https://localise.biz
    

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57. Manage translations projects
    

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59. Image
    Management
    

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60. • Free and Open-Source
    • Crop, resize & filter images
    • Caches and delivers images
    • WebP support
    • Symfony bundle integration
    

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61. # app/config/config.yml
    parameters:
    thumbor_secure_key: '%thumbor.secure.key%'
    thumbor_server_domain: '%thumbor.server.domain%'
    thumbor_filters:
    original_scaled_down:
    width: 1280
    height: 548
    dimensions: '1280x548'
    thumbnail:
    width: 310
    height: 206
    dimensions: '310x206'
    big:
    width: 797
    height: 533
    dimensions: '797x533'
    

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62. class="responsive-img swiper-lazy"
    alt="{{ hotelName }}"/>
    class="responsive-img swiper-lazy" alt="Le General
    Hôtel Paris 11ème"/>
    

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63. Aggregating
    Business Data
    3
    

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64. Tracking Reservations Statuses Changes
    1. To which state did the booking transition?
    2. Who performed the operation?
    3. When did the operation happen?
    4. Where did the operation happen?
    5. Any extra relevant reasons to provide
    

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66. Tracking booking lifecycle
    Automatic reminders
    Lifecycle graph
    

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67. Tracking booking lifecycle
    

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68. src/Dayuse/Reservations/
    └── Workflow/
    ├── Abandonment.php
    ├── AbstractTransition.php
    ├── AvailabilityConfirmationRequest.php
    ├── AvailabilityRequestAcceptance.php
    ├── AvailabilityRequestRefusal.php
    ├── Bookout.php
    ├── Cancellation.php
    ├── Confirmation.php
    ├── ConfirmationAttempt.php
    ├── Initialization.php
    ├── InstantAutomaticConfirmation.php
    ├── NoShow.php
    └── Reinstatement.php
    

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69. abstract class AbstractTransition
    {
    // ...
    abstract public function execute(array $context = []): void;
    final public function getUuid(): UuidInterface { return $this->uuid; }
    final public function getActor(): UserAccountIdentity { return $this->actor; }
    final public function getPlatformId(): int { return $this->platformId; }
    final public function getPlatformHostname(): ?string { return $this->platformHostname; }
    final public function getReasonCode(): ?string { return $this->reasonCode; }
    final public function getReasonMessage(): ?string { return $this->reasonMessage; }
    final public function getRecordedAt(): UtcDateTimeImmutable
    {
    return UtcDateTimeImmutable::createFromFormat('U', $this->recordedAt);
    }
    }
    

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70. final class SmsConfirmationAction extends AbstractBookingAction
    {
    /**
    * @Route("/sms-confirmation", name="_booking_reservation_sms_confirmation")
    */
    public function __invoke(Request $request): Response
    {
    // ...
    if ($form->isSubmitted() && $form->isValid()) {
    // ...
    try {
    $this->reservationService->attemptConfirmation(ConfirmationAttempt::create(
    $reservation,
    $this->getUser() ?: $reservation->getCustomer(),
    $bookingRequest->getOrigin(),
    $request->getHttpHost(),
    $request->getClientIp(),
    $request->headers->get('User-Agent')
    ));
    } catch (UnavailabilityException | IllegalReservationOperationException $e) {
    $this->bookingRequestRepository->remove();
    return $this->createUnavailabilityResponse($hotel, $room);
    }
    // ...
    }
    // ...
    }
    }
    

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71. namespace Dayuse\Entity;
    class Reservation
    {
    private $reservation;
    // ...
    final public function confirm(Confirmation $confirmation): void
    {
    $this->ensureSameReservation($confirmation->getReservation());
    $this->status = ReservationStatus::CONFIRMED;
    $this->recordLifecycleActivity($confirmation, ActivityStatus::confirmed());
    }
    }
    

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72. class Reservation
    {
    /**
    * @ORM\OneToMany(
    * targetEntity="Dayuse\Entity\ReservationLifecycleActivity",
    * mappedBy="reservation",
    * cascade={"persist", "remove"},
    * orphanRemoval=true
    * )
    */
    private $lifecycleActivities;
    // ...
    private function recordLifecycleActivity(AbstractTransition $trans, ActivityStatus $status): void
    {
    $this->lifecycleActivities->add(new ReservationLifecycleActivity(
    $this,
    $trans->getUuid(),
    $status,
    ActivityActor::fromUserAccount($trans->getActor()),
    Platform::fromPlatformId($trans->getPlatformId(), $trans->getPlatformHostname()),
    $trans->getReasonCode()
    ? ActivityReason::fromCode($trans->getReasonCode(), $trans->getReasonMessage())
    : null
    ,
    $trans->getRecordedAt()
    ));
    }
    }
    

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73. Make Billing
    Great Again!
    4
    

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74. Many Problems
    • Large variety of billable items
    • Free trials
    • Adjustments
    • Local taxes & VAT
    • Credit notes
    • Cash collection
    • Multi currency support
    • Multi languages support
    • Invoice PDF generation
    • Invoice automatic delivery
    

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75. Goals
    •Extensible
    •Flexible
    •Automated
    •Reliable
    

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76. Moneytary Values
    « If all your calculations are done in a single currency,
    this isn't a huge problem, but once you involve multiple
    currencies you want to avoid adding your dollars to your
    yen without taking the currency differences into
    account. »
    « The more subtle problem is with rounding. Monetary
    calculations are often rounded to the smallest currency
    unit. When you do this it's easy to lose pennies (or your
    local equivalent) because of rounding errors. »
    https://martinfowler.com/eaaCatalog/money.html
    

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77. Money Library
    class Invoice implements Billing, CreditNote
    {
    // ...
    public function getTotalBookingsItemPrice(): Money
    {
    $total = Money::{$this->billingCurrency}(0);
    foreach ($this->invoiceItems as $invoiceItem) {
    if ($invoiceItem instanceof CustomItem
    || $invoiceItem instanceof BookingFeesItem) {
    continue;
    }
    $total = $total->add($invoiceItem
    ->getItemUnitPrice()
    ->multiply($invoiceItem->getItemQuantity())
    );
    }
    return $total;
    }
    }
    

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78. class Invoice implements Billing, CreditNote
    {
    // ...
    public function balance(): Money
    {
    Assertion::false($this->isCreditNote());
    $balance = $this->getTotal();
    foreach ($this->payments as $payment) {
    $balance = $balance->subtract($payment->getAmount());
    }
    foreach ($this->creditNotes as $creditNote) {
    $balance = $balance->add($creditNote->getTotal());
    }
    return $balance;
    }
    }
    

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79. Refining our invoicing workflow
    

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80. framework:
    workflows:
    invoice:
    type: 'state_machine'
    supports:
    - Dayuse\Entity\Invoicing\Invoice
    marking_store:
    type: 'single_state'
    arguments:
    - 'status'
    initial_place: !php/const Dayuse\Entity\Invoicing\Invoice::BILLING_STATUS_EMITTED
    places:
    - !php/const Dayuse\Entity\Invoicing\Invoice::BILLING_STATUS_CREDITED
    - !php/const Dayuse\Entity\Invoicing\Invoice::BILLING_STATUS_EMITTED
    - !php/const Dayuse\Entity\Invoicing\Invoice::BILLING_STATUS_PAYMENT_DISPUTED
    - !php/const Dayuse\Entity\Invoicing\Invoice::BILLING_STATUS_PAID
    transitions:
    !php/const Dayuse\Entity\Invoicing\Invoice::BILLING_TRANSITION_DECLARE_CREDITED:
    from: !php/const Dayuse\Entity\Invoicing\Invoice::BILLING_STATUS_EMITTED
    to: !php/const Dayuse\Entity\Invoicing\Invoice::BILLING_STATUS_CREDITED
    !php/const Dayuse\Entity\Invoicing\Invoice::BILLING_TRANSITION_DECLARE_PAYMENT_DISPUTED:
    from: !php/const Dayuse\Entity\Invoicing\Invoice::BILLING_STATUS_EMITTED
    to: !php/const Dayuse\Entity\Invoicing\Invoice::BILLING_STATUS_PAYMENT_DISPUTED
    !php/const Dayuse\Entity\Invoicing\Invoice::BILLING_TRANSITION_DECLARE_PAID:
    from:
    - !php/const Dayuse\Entity\Invoicing\Invoice::BILLING_STATUS_PAYMENT_DISPUTED
    - !php/const Dayuse\Entity\Invoicing\Invoice::BILLING_STATUS_EMITTED
    to: !php/const Dayuse\Entity\Invoicing\Invoice::BILLING_STATUS_PAID
    

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81. /**
    * @Route("/invoicing/item", name="invoicing_item_")
    * @IsGranted({"ROLE_TESTER", "ROLE_ADMIN"})
    */
    final class InvoiceItemController extends Controller
    {
    // ...
    /**
    * @Route("/declare-no-show/{id}/{bookingItemId}", name="declare_no_show")
    */
    public function declareNoShow(Hotel $hotel, int $bookingItemId): Response
    {
    $this->init($hotel, $bookingItemId);
    $this->workflow->apply($this->item, InvoiceItem::TRANSITION_DECLARE_NO_SHOW);
    $this->objectManager->persist($this->item);
    $this->objectManager->flush();
    return $this->redirectToRoute('invoicing_item_list_by_hotel', [
    'id' => $this->item->getHotel()->getId(),
    ]);
    }
    }
    

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83. View Slide

84. Being more Agile
    and Keep Delivering
    Value
    5
    

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85. Gitflow
    https://blog.xebia.fr/2018/03/28/gitflow-est-il-le-workflow-dont-jai-besoin/
    

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86. Semver
    

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87. View Slide

88. Encouraging our colleagues to use Gitlab
    

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89. Leveraging Gitlab Features
    

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90. « Agile » / « Project Management » Process
    

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91. SymfonyLive 2019 / Sept. 26th / Berlin / Germany Hugo Hamon
    Thank you for
    listening!
    

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