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Speaker: Larry Garfield @crell https://twitter.com/crell

Slides: http://www.garfieldtech.com/presentations/sfsf2012-drupal8/#1

Symfony2 meets Drupal 8

Track record

  • Powers 2% of sites
  • Explosive growth
  • Large community
  • Thousands of extensions

Issues:

  • 11 years old
  • Powered by PHP4

Solution:

  • Kernel of drupal
    • HttpFoundation
    • Routing
    • EventDispatcher
  • Steering as close to existing components as possible
  • Extended HttpKernel

Impressions:

  • Drupal drastically rewrote their loader to mimick symfony style and PHP5 standards.

Routing

  • Drupal has ~1000 routes, most admin routes
  • NestedMatcher is nearly complete
    • Databse backed fit based algorithm
    • Multi-stage matcher, filter based
    • Configurable via DIC
    • will support mimetype based matching
    • tentative work on stand alone negotiation library
  • Will be pushed upstream to Symfony CMF routing

Dependency Injection

  • Drupal has a lot of globals
    • Migrating to use injection container
  • Currently used to check if global, else use DIC.

Event dispatcher

Drupal 7

Benefits

  • Like event dispatcher but uses function_exists() for registration
  • Used for procedural AOP
  • Faster than EventDispatcher
  • No need to compile

Limitations

  • No class autoloading
  • Hard to unit test
  • Only one of each hook per module

Drupal 8

  • Will have both EventDispatcher and Hooks
  • EventDispatcher closer to the core, Hooks further out
  • Refactor hook engine to not be completely global for testing

Drupal 9

  • Just eventDispatcher?

Twig

Drupal 7

  • PHP as tempalate language
  • Array based rendering, defer rendering until the last possible moment
  • Powerful preprocessing/filtering

Benefits

  • Extremely flexible
  • No need to compile templates
  • On ramp for front-end developers to become PHP developers
  • "All template languages eventually evolve to become Turing Complete"

Drawbacks

  • Extremely opaque
  • Unpredictable
  • Front-end need to become PHP devs

Drupal 8

  • MAYBE

Benefits

  • More secure
  • More front-end developer friendly
  • Twig.js
  • Not drupal-proprietary

Drawbacks

  • Extremely different model makes transition difficult

Replace NIH with PIE

"Proudly Invented Elsewhere"

  • YAML component for config
  • Doctrine common annotations
  • Partial composer usage

Considering

  • Assetic (meh)
  • Guzzle (HTTP requests)
  • Imagine (image handling)

Refactors

  • PSR-0
  • Gettext
  • PhpStorage
  • Archiver
  • Graph
  • Plugin
  • Reflection
  • Configuration management
  • Mobile friendly administration
  • HTML5 everywhere
  • Improved multi-linqual support
  • Responsive Mobile-First themes
  • Revamped entity system
  • Block driven, ESI friendly layout

Collaboration

Licenses

  • SF2: MIT
  • Drupal: GPL

Drupal added:

  • New Flash messaging API
  • File Streaming -- 2.2
  • Response::prepare() chaining
  • Improve FlattenException
  • UTF-8 encoding weirdness in JSON
  • Allow routing matching on a full Request
  • Make RouteCollection countable
  • Imrpove route serialization
  • TODO: missing item. Please fill?

What is drupal?

Drupal isn't a framework, isn't a CMS-- it's a (symfony based) platform