#D8CX: Upgrade your modules to Drupal 8 (Part 1 and 2)

#D8CX
Kate Marshalkina & Konstantin Komelin
DrupalCamp Kyiv 2013 Start Here
Upgrade your modules
to Drupal 8

A Little More About Us
2
DrupalCamp Kyiv 2013
[Moscow, Russia]
• UI Cache Clear module author
• Contributor to several modules
• Web developer at Licel LLC
[Saint Petersburg, Russia]
• Author of Yandex.Metrics, Pinned Site
• Contributor to modules and themes
• Co-organizer of Drupal Community in St. Petersburg
• Individual web developer, trainer and consultant
Kate Marshalkina kalabro
Konstantin Komelin KKomelin

What is Drupal 8?
3
Drupal 8
≠

LOREM IPSUM DOLOREM COMPANY Insert You Tagline Here
Drupal 8 — Drupal,even better!
4

Mobilesupport&inlineediting
5

#D8CX: Drupal 8 Contrib Experience
• Release top 40 modules together with D8
• 27 modules with #D8CX flag (Jun 8, 2013)
• Not only top modules are important!
#D8CX: I pledge that UI Cache Clear will have a full Drupal 8 release on the day that
Drupal 8 is released.
#D8CX: We pledge that Yandex.Metrics will have a full Drupal 8 release on the day
that Drupal 8 is released.
#D8CX: I pledge that Yandex Services Authorization API will have a full Drupal 8
release on the day that Drupal 8 is released.
6

Why should I upgrade?
7
• Be one of the first
• Prepare to D8
• Learn Drupal 8 API
• Help to community and Drupal
• Just for fun ;)

When should I start?
8
“In Villabajo they are still drilling the core and don’t have agreements about
many things, and in Villarriba others have already upgraded modules”
D8 begins
Mar 10, 2011
Alpha1 RC
Dec, 2013
Beta
May 20, 2013
Drupal 8.0
Sep-Oct, 2013
July, 2013

Our examples>

Yandex.Metrics (8.x)
10

UI Cache Clear (7.x)
11

UI Cache Clear (8.x)
12

13
New home for sites/all/*
Drupal 7 Drupal 8
A new folder structure

Before you start
14
• Update PHP to 5.3.10
• Reconcile to o_OP
• Get used to use https://drupal.org/list-changes
• Be ready to reinstall Drupal
• Prepare your rocket ;)

Find 5 differences
15
Drupal 7 Drupal 8
name = 'Yandex.Metrics Counter'
core = 7.x
files[] = yandex_metrics.test
name: 'Yandex.Metrics Counter'
core: 8.x
type: module
yandex_metrics.info yandex_metrics.info.yml

16
Hurray!
We’ve just upgraded the module!
Thanks for coming!
Goodbye :-P

hook_menu and routing
17
function yandex_metrics_menu() {
$items['admin/config/system/yandex_metrics'] = array(
'title' => 'Yandex.Metrics',
'route_name' => 'yandex_metrics_counter_settings',
);
// ...
}
yandex_metrics.moduleStep 2
yandex_metrics_counter_settings:
pattern: '/admin/config/system/yandex_metrics'
defaults:
_form: 'Drupalyandex_metricsFormYandexMetricsCounterSettingsForm'
requirements:
_permission: 'administer Yandex.Metrics settings'
yandex_metrics.routing.ymlStep 1

Settings form
18
namespace Drupalyandex_metricsForm;
use DrupalsystemSystemConfigFormBase;
class YandexMetricsCounterSettingsForm extends SystemConfigFormBase {
public function getFormID() {
return 'yandex_metrics_counter_settings';
}
//...
lib/Drupal/yandex_metrics/Form/YandexMetricsCounterSettingsForm.php
— Goodbye, system_settings_form().

Settings form
19
public function buildForm(array $form, array &$form_state) {
$form['path'] = array(
'#type' => 'details',
'#title' => t('Page specific tracking settings'),
);
// ...
return parent::buildForm($form, $form_state);
}
public function validateForm(array &$form, array &$form_state) { }
public function submitForm(array &$form, array &$form_state) { }
lib/Drupal/yandex_metrics/Form/YandexMetricsCounterSettingsForm.php
Override methods that you need

Configuration & State
20
Variables (D7)
Configuration (D8)
State (D8)

Configuration files
21
yandex_metrics.settings:
type: mapping
label: 'Yandex.Metrics Counter settings'
mapping:
counter_code:
type: string
label: 'Counter code'
config/schema/yandex_merics.schema.yml
counter_code: ''
config/yandex_merics.settings.yml

Config & State
22
// Get config value.
$counter_code = Drupal::config('yandex_metrics.settings')
->get('counter_code');
// Set config value.
Drupal::config('yandex_metrics.settings')
->set('counter_code', $counter_code)->save();
In files
// Get value of state variable.
$value = Drupal::state()->get('some_module.key');
// Set value of state variable.
Drupal::state()->set('some_module.key', $value);
In database

Entities
23
Fieldable
EntityNG (DX)
Why: deployment, unification
Idea: ctools exportables
Implementation: plugins + yml
new
Content Entities Config Entities
Examples:
Nodes
Taxonomy terms
Users
Comments
Files
Menu Links
…
Examples:
Block instances
Vocabularies
User roles
Views
Menus
Display Modes
Image Styles
…

>
To be continued…

#D8CX
Kate Marshalkina & Konstantin Komelin
DrupalCamp Kyiv 2013 Continue Here
Upgrade your modules
to Drupal 8
Part 2

Drupal 8 Plugins
26
Why: extend them all!
Idea: ctools, next generation.
Implementation: classes, annotations.
Examples:
Blocks
Views
Entities
Field Widgets/Formatters
Text Filters
…
That’s not a
“Wordpress” plugin,
guys :)

Block Plugin (theoretical)
27

Block Plugin (practice)
28
LOREM IPSUM DOLOREM COMPANY Insert You Tagline Here
28
namespace Drupalhello_worldPluginBlock;
Now plugin will be found
automatically!

29
Annotations instead of hook_*_info()
/**
* Provides a 'Random number' block.
*
* @Plugin(
* id = "hello_world_random_number",
* admin_label = @Translation("Random number"),
* module = "hello_world"
* )
*/
class HelloWorldRandomBlock extends BlockBase {
lib/Drupal/hello_world/Plugin/Block/HelloWorldRandomBlock.php

30
Override methods that you need
protected function blockBuild() {
$this->configuration['label'] = t('Random number');
return array(
'#markup' => rand(1, 9),
);
}
//..
public function settings() { }
public function blockForm($form, &$form_state) { }
public function blockSubmit($form, &$form_state) { }
..lib/Drupal/hello_world/Plugin/Block/HelloWorldRandomBlock.php

Block Entities (theoretical)
31
block.block.bartik.search.yml
block.block.bartik.about_this_site.yml
block.block.bartik.random_number.yml

Block Entities (practice)
32
sites/default/files/config_#HASH#/active/block.block.bartik.random_number_1.yml
× 2

Hooks?
33
/**
* Implements hook_form_FORM_ID_alter().
*/
function ui_cache_clear_form_block_form_alter(&$form, $form_state)
{
$config_entity = $form_state['controller']->getEntity();
// Fieldset replaced by details.
$form['cache_details'] = array(
'#type' => 'details',
'#title' => t('Cache settings'),
);
// ..
• Hooks are still here.
• And there are new!
ui_cache_clear.module

Visualization API (8.x)
35
https://drupal.org/sandbox/Niremizov/1985870
Thx Christophe Van Gysel!
Module features:
• Theme hook
• Plugin service (custom
chart handlers)
• Views Style Plugin

Views
36
• Inside core and already works
• Uses core Plugin System
• Export/Import using Config Entities
• Small API changes
CamelCase
hook_views_api, hook_views_plugin
Tip: How to create default view in Drupal 8:
Copy sitesdefaultfilesconfig_{HASH}activeconfigviews.view.{view_name}.yml
Paste modules{module_name}configviews.view.{view_name}.yml

Views Plugins
37
Drupal 7 Drupal 8
/**
* Implements hook_views_plugins().
*/
function vi..on_views_plugins() {
return array(
'style' => array(
'visualization' => array(
'title' =>
t('Visualization'),
'type' => 'normal',
'theme' => 'visualization',
// ...
'handler' =>
'visualization_plugin_style',
'uses options' => TRUE,
'uses grouping' => FALSE,
/*
* @Plugin(
* id = "visualization",
* title = @Translation("Visualization"),
* display_types = {"normal"}
* theme = "visualization",
* module = "visualization",
* )
*/
class Visualization
extends StylePluginBase {
protected $usesRowClass = TRUE;
protected $usesGrouping = FALSE;
protected $usesFields = TRUE;
// ...
}

PHPTemplate → Twig
38
{# core/modules/block/templates/block.html.twig #}
<div{{ attributes }}>
{{ title_prefix }}
{% if label %}
<h2{{ title_attributes }}>{{ label }}</h2>
{% endif %}
{{ title_suffix }}
<div{{ content_attributes }}>
{{ content }}
</div>
</div>

KEEP CALM
AND
CLEAR CACHE
And Drupal 8 says:
— “Fatal error: Call to undefined function cache_clear_all()”

Cache System
Cache Tags instead of wildcards
Cached Item 1
Tag 1
Tag 2
Tag 3
Cached Item 2 Tag 2 Cached Item 3
Tag 1
Tag 3
cache()->invalidateTags(array('Tag 2'));
Cached Item 3
Tag 1
Tag 3
Cached Item 1
Tag 1
Tag 2
Tag 3
Cached Item 2 Tag 2
*
Note: Drupal calculates “checksum” for every cache tag when read from cache!
40

Cache System
41
// Set cache to 'page' bin.
cache('page')->set($cid, $data, $expire, $tags);
New Cache API
// Truncate cache table.
cache()->deleteAll();
// Marks cache items from all bins with 'content' tag as invalid.
cache_invalidate_tags(array('content' => TRUE));
// Get multiple cache items.
cache('field')->getMultiple($cids);
// Get item even it is invalid.
cache()->get('field:user:1', TRUE);

Automated tests
42
namespace Drupalyandex_metricsTests;
use DrupalsimpletestWebTestBase;
class CounterTest extends WebTestBase {
public static $modules = array('yandex_metrics');
public static function getInfo() { }
public function setUp() {
parent::setUp();
}
public function tearDown() { }
lib/Drupal/yandex_metrics/Tests/CounterTest.php

Join #D8CX!
Upgrade your module to Drupal 8 or help others!+

References
44
• Change records for Drupal core
http://drupal.org/list-changes
• [May 22, 2013] Alex Bronstein (effulgentsia) - Upgrading your modules to
Drupal 8
http://portland2013.drupal.org/session/upgrading-your-modules-drupal-8
• [Feb 8, 2013] Angie Byron (webchick) - Step-by-step: Converting modules
from Drupal 7 to Drupal 8
http://webchick.net/node/118
• [Nov 4, 2012] Tim Plunkett (tim.plunkett) - D8CX: The Reckoning
http://2012.badcamp.net/program/sessions/d8cx-reckoning

!
Thank you for your attention!
Konstantin Komelin
@KKomelin
konstantin@komelin.com
Kate Marshalkina
@kalabro
marshalkina@licel.ru

#D8CX: Upgrade your modules to Drupal 8 (Part 1 and 2)

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#D8CX: Upgrade your modules to Drupal 8 (Part 1 and 2)