Add channel property to MarketingCampaign

plugins/woocommerce/src/Admin/Marketing/MarketingCampaign.php

@@ -22,6 +22,13 @@ class MarketingCampaign implements JsonSerializable {
 	 */
 	protected $id;
 
+	/**
+	 * The marketing channel that this campaign belongs to.
+	 *
+	 * @var MarketingChannelInterface
+	 */
+	protected $channel;
+
 	/**
 	 * Title of the marketing campaign.
 	 *
@@ -47,12 +54,14 @@ class MarketingCampaign implements JsonSerializable {
 	 * MarketingCampaign constructor.
 	 *
 	 * @param string                    $id         The marketing campaign's unique identifier.
+	 * @param MarketingChannelInterface $channel    The marketing channel that this campaign belongs to.
 	 * @param string                    $title      The title of the marketing campaign.
 	 * @param string                    $manage_url The URL to the channel's campaign management page.
 	 * @param Price|null                $cost       The cost of the marketing campaign with the currency.
 	 */
-	public function __construct( string $id, string $title, string $manage_url, Price $cost = null ) {
+	public function __construct( string $id, MarketingChannelInterface $channel, string $title, string $manage_url, Price $cost = null ) {
 		$this->id         = $id;
+		$this->channel    = $channel;
 		$this->title      = $title;
 		$this->manage_url = $manage_url;
 		$this->cost       = $cost;
@@ -67,6 +76,15 @@ class MarketingCampaign implements JsonSerializable {
 		return $this->id;
 	}
 
+	/**
+	 * Returns the marketing channel that this campaign belongs to.
+	 *
+	 * @return MarketingChannelInterface
+	 */
+	public function get_channel(): MarketingChannelInterface {
+		return $this->channel;
+	}
+
 	/**
 	 * Returns the title of the marketing campaign.
 	 *
@@ -102,6 +120,7 @@ class MarketingCampaign implements JsonSerializable {
 	public function jsonSerialize() {
 		return [
 			'id'         => $this->get_id(),
+			'channel'    => $this->get_channel()->get_slug(),
 			'title'      => $this->get_title(),
 			'manage_url' => $this->get_manage_url(),
 			'cost'       => $this->get_cost(),

plugins/woocommerce/tests/php/src/Admin/Marketing/MarketingCampaignTest.php

@@ -3,6 +3,7 @@
 namespace Automattic\WooCommerce\Tests\Admin\Marketing;
 
 use Automattic\WooCommerce\Admin\Marketing\MarketingCampaign;
+use Automattic\WooCommerce\Admin\Marketing\MarketingChannelInterface;
 use Automattic\WooCommerce\Admin\Marketing\Price;
 use WC_Unit_Test_Case;
 
@@ -15,7 +16,10 @@ class MarketingCampaignTest extends WC_Unit_Test_Case {
 	 * @testdox `get_id`, `get_title`, `get_manage_url`, and `get_cost` return the class properties set by the constructor.
 	 */
 	public function test_get_methods_return_properties() {
-		$marketing_campaign = new MarketingCampaign( '1234', 'Ad #1234', 'https://example.com/manage-campaigns', new Price( '1000', 'USD' ) );
+		$test_channel_1 = $this->createMock( MarketingChannelInterface::class );
+		$test_channel_1->expects( $this->any() )->method( 'get_slug' )->willReturn( 'test-channel-1' );
+
+		$marketing_campaign = new MarketingCampaign( '1234', $test_channel_1, 'Ad #1234', 'https://example.com/manage-campaigns', new Price( '1000', 'USD' ) );
 
 		$this->assertEquals( '1234', $marketing_campaign->get_id() );
 		$this->assertEquals( 'Ad #1234', $marketing_campaign->get_title() );
@@ -29,7 +33,9 @@ class MarketingCampaignTest extends WC_Unit_Test_Case {
 	 * @testdox `cost` property can be null.
 	 */
 	public function test_cost_can_be_null() {
-		$marketing_campaign = new MarketingCampaign( '1234', 'Ad #1234', 'https://example.com/manage-campaigns' );
+		$test_channel_1 = $this->createMock( MarketingChannelInterface::class );
+
+		$marketing_campaign = new MarketingCampaign( '1234', $test_channel_1, 'Ad #1234', 'https://example.com/manage-campaigns' );
 
 		$this->assertNull( $marketing_campaign->get_cost() );
 	}
@@ -38,13 +44,17 @@ class MarketingCampaignTest extends WC_Unit_Test_Case {
 	 * @testdox It can be serialized to JSON including all its properties.
 	 */
 	public function test_can_be_serialized_to_json() {
-		$marketing_campaign = new MarketingCampaign( '1234', 'Ad #1234', 'https://example.com/manage-campaigns', new Price( '1000', 'USD' ) );
+		$test_channel_1 = $this->createMock( MarketingChannelInterface::class );
+		$test_channel_1->expects( $this->any() )->method( 'get_slug' )->willReturn( 'test-channel-1' );
+
+		$marketing_campaign = new MarketingCampaign( '1234', $test_channel_1, 'Ad #1234', 'https://example.com/manage-campaigns', new Price( '1000', 'USD' ) );
 
 		$json = wp_json_encode( $marketing_campaign );
 		$this->assertNotEmpty( $json );
 		$this->assertEqualSets(
 			[
 				'id'         => $marketing_campaign->get_id(),
+				'channel'    => 'test-channel-1',
 				'title'      => $marketing_campaign->get_title(),
 				'manage_url' => $marketing_campaign->get_manage_url(),
 				'cost'       => [