Code samples used in the presentation: https://github.com/Ozmodiar/Drupal-DIC-Presentation These are the slides of the presenation I gave at DrupalCamp Ghent 2014 about developing Drupal 7 with Drupal 8 in mind. A session about how we managed to do Drupal development with object-oriented custom modules and Composer and Symfony Container integration. All to provide an easier migration to Drupal 8 later on.

1. Develop a Drupal 7 project
with Drupal 8 in mind
Joeri van Dooren

2. WHOAMI
Who Am I
Joeri van Dooren
Technical Coach @ SAGA Consulting Group
@Ozmodiar
https://www.drupal.org/u/ozmodiar

3. SAGA Consulting Group

4. Context
• Long life span
• A lot of custom code
• A lot of developers
• Drupal 8 vs Drupal 7

5. Challenges
• Migration of custom code to D8
• External libraries
• “Big project syndrome”

6. Code sample: D7

7. Setup
The problems…
• Unreadable
• Unmaintainable
• Not testable (enough)
• Not upgradable
Vanilla Drupal 7
Object Oriented Code

8. Setup
Vanilla Drupal 7
What have we done?
• xautoload module
• Drupal 8 class structure
Object Oriented Code

9. Code sample: OO

10. Setup
The problems…
• Always re-instantiating
classes
• Not very maintainable
• Not the D8 way
Vanilla Drupal 7
Object Oriented Code
Dependency Injection

11. Setup
Vanilla Drupal 7
Object Oriented Code
Dependency Injection
What have we done?

12. Code sample: DI

13. Setup
This is better, but…
• Still not very readable
• Not flexible enough
• More D8 style, but…
• D8 has a better solution
Vanilla Drupal 7
Object Oriented Code
Dependency Injection
Container

14. Vanilla Drupal 7
Setup
Object Oriented Code
Dependency Injection
Container
What have we done?
• Custom module
• Symfony Container
• D8 uses that too!
• Copy paste library
• xautoload module

15. Code sample: Container

16. Setup
This is way better but…
• Bad library maintenance
• D8 has a better solution!
Vanilla Drupal 7
Object Oriented Code
Dependency Injection
Container
Dependency Manager

17. Vanilla Drupal 7
Setup
Object Oriented Code
Dependency Injection
Container
Dependency Manager
What have we done?
• Introduced Composer
• Better library
management
• Libraries not in VCS
• Drupal 8 uses that too!

18. Composer
• Package Manager
• Packagist.org or other VCS
• composer.json
• Vendor folder
• Autoloading

19. Code sample: Composer

20. Setup
Vanilla Drupal 7
Object Oriented Code
Dependency Injection
Container
Dependency Manager

21. Achievements
• Easy external libraries
• More Drupal 8 compliant
• Object Oriented
• Module structure
• DI with Symfony Container
• Less steep learning curve for D8 module dev

22. Extra advantages
• Readability
• Maintainability
• Extensibility
• Easy debugging
• Better testing
• We got off the island (in D7!)

23. Points of attention
• Developers need a new mindset
• Work around D7 limitations
• Different code reviews

24. The next level
• Run your own Packagist (or Satis)
• Write your own interfaces to improve code
reviews
• Write modules as libraries with a Drupal
module as adapter

25. More info
Getting started
http://www.saga.be/dic
Extras
http://youtu.be/GF0EWdsPfZ4 (dependency Injection)
https://getcomposer.org
http://symfony.com/doc/current/book/service_container.html

26. Want to know more?
Visit SAGA at our booth

27. Want to know more?
Tomorrow, because now:

28. Questions?