Issue #2980702 by bojanz: Allow conditions to optionally be aware of …

…the parent entity

modules/order/src/Plugin/Commerce/Condition/OrderItemQuantity.php

@@ -3,6 +3,8 @@
 namespace Drupal\commerce_order\Plugin\Commerce\Condition;
 
 use Drupal\commerce\Plugin\Commerce\Condition\ConditionBase;
+use Drupal\commerce\Plugin\Commerce\Condition\ParentEntityAwareInterface;
+use Drupal\commerce\Plugin\Commerce\Condition\ParentEntityAwareTrait;
 use Drupal\commerce_price\Calculator;
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Form\FormStateInterface;
@@ -18,9 +20,12 @@
  *   label = @Translation("Total product quantity"),
  *   category = @Translation("Order"),
  *   entity_type = "commerce_order",
+ *   parent_entity_type = "commerce_promotion",
  * )
  */
-class OrderItemQuantity extends ConditionBase {
+class OrderItemQuantity extends ConditionBase implements ParentEntityAwareInterface {
+
+  use ParentEntityAwareTrait;
 
   /**
    * {@inheritdoc}
@@ -74,6 +79,9 @@ public function evaluate(EntityInterface $entity) {
     $this->assertEntity($entity);
     /** @var \Drupal\commerce_order\Entity\OrderInterface $order */
     $order = $entity;
+    /** @var \Drupal\commerce_promotion\Entity\PromotionInterface $promotion */
+    $promotion = $this->parentEntity;
+
     $quantity = '0';
     foreach ($order->getItems() as $order_item) {
       // @todo Filter by offer conditions here, once available.

modules/order/tests/src/Unit/Plugin/Commerce/Condition/OrderItemQuantityTest.php

@@ -5,6 +5,7 @@
 use Drupal\commerce_order\Entity\OrderInterface;
 use Drupal\commerce_order\Entity\OrderItemInterface;
 use Drupal\commerce_order\Plugin\Commerce\Condition\OrderItemQuantity;
+use Drupal\commerce_promotion\Entity\PromotionInterface;
 use Drupal\Tests\UnitTestCase;
 
 /**
@@ -19,10 +20,15 @@ class OrderItemQuantityTest extends UnitTestCase {
    * @dataProvider quantityProvider
    */
   public function testEvaluate($operator, $quantity, $given_quantity, $result) {
+    $parent_entity = $this->prophesize(PromotionInterface::class);
+    $parent_entity = $parent_entity->reveal();
+
     $condition = new OrderItemQuantity([
       'operator' => $operator,
       'quantity' => $quantity,
     ], 'order_item_quantity', ['entity_type' => 'commerce_order']);
+    $condition->setParentEntity($parent_entity);
+
     $order_item = $this->prophesize(OrderItemInterface::class);
     $order_item->getEntityTypeId()->willReturn('commerce_order_item');
     $order_item->getQuantity()->willReturn($given_quantity);

modules/payment/src/Entity/PaymentGateway.php

@@ -4,6 +4,7 @@
 
 use Drupal\commerce\CommerceSinglePluginCollection;
 use Drupal\commerce\ConditionGroup;
+use Drupal\commerce\Plugin\Commerce\Condition\ParentEntityAwareInterface;
 use Drupal\commerce_order\Entity\OrderInterface;
 use Drupal\Core\Config\Entity\ConfigEntityBase;
 
@@ -188,7 +189,11 @@ public function getConditions() {
     $plugin_manager = \Drupal::service('plugin.manager.commerce_condition');
     $conditions = [];
     foreach ($this->conditions as $condition) {
-      $conditions[] = $plugin_manager->createInstance($condition['plugin'], $condition['configuration']);
+      $condition = $plugin_manager->createInstance($condition['plugin'], $condition['configuration']);
+      if ($condition instanceof ParentEntityAwareInterface) {
+        $condition->setParentEntity($this);
+      }
+      $conditions[] = $condition;
     }
     return $conditions;
   }

modules/promotion/src/Entity/Promotion.php

@@ -5,6 +5,7 @@
 use Drupal\commerce\ConditionGroup;
 use Drupal\commerce\Entity\CommerceContentEntityBase;
 use Drupal\commerce\Plugin\Commerce\Condition\ConditionInterface;
+use Drupal\commerce\Plugin\Commerce\Condition\ParentEntityAwareInterface;
 use Drupal\commerce_order\Entity\OrderInterface;
 use Drupal\commerce_promotion\Plugin\Commerce\PromotionOffer\OrderItemPromotionOfferInterface;
 use Drupal\commerce_promotion\Plugin\Commerce\PromotionOffer\PromotionOfferInterface;
@@ -193,7 +194,11 @@ public function getConditions() {
     $conditions = [];
     foreach ($this->get('conditions') as $field_item) {
       /** @var \Drupal\commerce\Plugin\Field\FieldType\PluginItemInterface $field_item */
-      $conditions[] = $field_item->getTargetInstance();
+      $condition = $field_item->getTargetInstance();
+      if ($condition instanceof ParentEntityAwareInterface) {
+        $condition->setParentEntity($this);
+      }
+      $conditions[] = $condition;
     }
     return $conditions;
   }

src/Annotation/CommerceCondition.php

@@ -60,6 +60,18 @@ class CommerceCondition extends Plugin {
    */
   public $entity_type;
 
+  /**
+   * The parent entity type ID.
+   *
+   * This is the entity type ID of the entity that embeds the conditions.
+   * For example: 'commerce_promotion'.
+   *
+   * When specified, a condition will only be available on that entity type.
+   *
+   * @var string
+   */
+  public $parent_entity_type;
+
   /**
    * The condition weight.
    *

src/ConditionManager.php

@@ -82,10 +82,21 @@ public function processDefinition(&$definition, $plugin_id) {
    * {@inheritdoc}
    */
   public function getFilteredDefinitions($parent_entity_type_id, array $entity_type_ids) {
-    $definitions = array_filter($this->getDefinitions(), function ($definition) use ($entity_type_ids) {
-      return in_array($definition['entity_type'], $entity_type_ids);
-    });
-    // Certain conditions might be unavailable to the given parent entity type.
+    $definitions = $this->getDefinitions();
+    foreach ($definitions as $plugin_id => $definition) {
+      // Filter by entity type.
+      if (!in_array($definition['entity_type'], $entity_type_ids)) {
+        unset($definitions[$plugin_id]);
+        continue;
+      }
+      // Filter by parent_entity_type, if specified by the plugin.
+      if (!empty($definition['parent_entity_type'])) {
+        if ($definition['parent_entity_type'] != $parent_entity_type_id) {
+          unset($definitions[$plugin_id]);
+        }
+      }
+    }
+    // Allow modules to filter the condition list.
     $event = new FilterConditionsEvent($definitions, $parent_entity_type_id);
     $this->eventDispatcher->dispatch(CommerceEvents::FILTER_CONDITIONS, $event);
     $definitions = $event->getDefinitions();

src/Plugin/Commerce/Condition/ParentEntityAwareInterface.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace Drupal\commerce\Plugin\Commerce\Condition;
+
+use Drupal\Core\Entity\EntityInterface;
+
+/**
+ * Defines the interface for conditions that depend on the parent entity.
+ *
+ * For example, an order condition needing access to the parent promotion.
+ *
+ * @see \Drupal\commerce\Plugin\Commerce\Condition\ParentEntityAwareTrait
+ */
+interface ParentEntityAwareInterface {
+
+  /**
+   * Sets the parent entity.
+   *
+   * @param \Drupal\Core\Entity\EntityInterface $parent_entity
+   *   The parent entity.
+   *
+   * @return $this
+   */
+  public function setParentEntity(EntityInterface $parent_entity);
+
+}

src/Plugin/Commerce/Condition/ParentEntityAwareTrait.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace Drupal\commerce\Plugin\Commerce\Condition;
+
+use Drupal\Core\Entity\EntityInterface;
+
+/**
+ * Provides a trait for implementing ParentEntityAwareInterface.
+ */
+trait ParentEntityAwareTrait {
+
+  /**
+   * The parent entity.
+   *
+   * @var \Drupal\Core\Entity\EntityInterface
+   */
+  protected $parentEntity;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setParentEntity(EntityInterface $parent_entity) {
+    $this->parentEntity = $parent_entity;
+    return $this;
+  }
+
+}