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Adds a new tab in the block settings to control the block visibility based on a custom field
<?php
namespace Drupal\slq_blocks\Plugin\Condition;
use Drupal\Core\Condition\ConditionPluginBase;
use Drupal\Core\Form\FormStateInterface;
/**
* Provides a 'Site Theme' condition.
*
* @Condition(
* id = "site_theme",
* label = @Translation("Site Theme"),
* context_definitions = {
* "node" = @ContextDefinition("entity:node", label = @Translation("Node"))
* }
* )
*/
class SiteTheme extends ConditionPluginBase {
/**
* {@inheritdoc}
*/
protected function getSiteThemes() {
$defaultTheme = ['theme1' => 'Site Theme 1'];
$themes = \Drupal::service('entity_field.manager')->getFieldStorageDefinitions('node')['field_site_theme']->get('settings')['allowed_values'];
$themes = array_merge($defaultTheme, $themes);
return $themes;
}
/**
* {@inheritdoc}
*/
protected function getCurrentNodeSiteThemeId() {
$node = $this->getContextValue('node');
$defaultThemeId = 'theme1';
if ($node && $node->hasField('field_site_theme') && !$node->field_site_theme->isEmpty()) {
return $node->field_site_theme->value;
}
else {
return $defaultThemeId;
}
}
/**
* {@inheritdoc}
*/
public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
$siteThemes = $this->getSiteThemes();
$currentValues = $this->configuration['site_themes'] ?? [];
$form['site_themes'] = [
'#type' => 'checkboxes',
'#title' => $this->t('Select the site themes you want this block to appear on:'),
'#default_value' => $currentValues,
'#options' => array_map('\Drupal\Component\Utility\Html::escape', $siteThemes),
'#description' => $this->t('If you select no values, the condition will evaluate to TRUE for all users.'),
];
return parent::buildConfigurationForm($form, $form_state);
}
/**
* {@inheritdoc}
*/
public function defaultConfiguration() {
return [
'site_themes' => [],
] + parent::defaultConfiguration();
}
/**
* {@inheritdoc}
*/
public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
$this->configuration['site_themes'] = array_filter($form_state->getValue('site_themes'));
parent::submitConfigurationForm($form, $form_state);
}
/**
* {@inheritdoc}
*/
public function summary() {
$siteThemes = array_intersect_key($this->getSiteThemes(), $this->configuration['site_themes']);
if (count($siteThemes) > 1) {
$siteThemes = implode(', ', $siteThemes);
}
else {
$siteThemes = reset($siteThemes);
}
if (!empty($this->configuration['negate'])) {
return $this->t('The site theme is not @siteThemes', ['@siteThemes' => $siteThemes]);
}
else {
return $this->t('The site theme is a member of @siteThemes', ['@siteThemes' => $siteThemes]);
}
}
/**
* {@inheritdoc}
*/
public function evaluate() {
if (empty($this->configuration['site_themes']) && !$this->isNegated()) {
return TRUE;
}
$siteThemeId = $this->getCurrentNodeSiteThemeId();
return (bool) array_key_exists($siteThemeId, $this->configuration['site_themes']);
}
/**
* {@inheritdoc}
*/
public function getCacheContexts() {
return [];
}
}
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