Add MarketingCampaignType class

This allows defining campaign types for each marketing channel.

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

@@ -0,0 +1,130 @@
+<?php
+/**
+ * Represents a marketing campaign type supported by a marketing channel.
+ *
+ * Marketing channels (implementing MarketingChannelInterface) can use this class to define what kind of campaigns they support.
+ */
+
+namespace Automattic\WooCommerce\Admin\Marketing;
+
+/**
+ * MarketingCampaignType class
+ *
+ * @since x.x.x
+ */
+class MarketingCampaignType {
+	/**
+	 * The unique identifier.
+	 *
+	 * @var string
+	 */
+	protected $id;
+
+	/**
+	 * The marketing channel that this campaign type belongs to.
+	 *
+	 * @var MarketingChannelInterface
+	 */
+	protected $channel;
+
+	/**
+	 * Name of the marketing campaign type.
+	 *
+	 * @var string
+	 */
+	protected $name;
+
+	/**
+	 * Description of the marketing campaign type.
+	 *
+	 * @var string
+	 */
+	protected $description;
+
+	/**
+	 * The URL to the create campaign page.
+	 *
+	 * @var string
+	 */
+	protected $create_url;
+
+	/**
+	 * The URL to an image/icon for the campaign type.
+	 *
+	 * @var string
+	 */
+	protected $icon_url;
+
+	/**
+	 * MarketingCampaignType constructor.
+	 *
+	 * @param string                    $id          A unique identifier for the campaign type.
+	 * @param MarketingChannelInterface $channel     The marketing channel that this campaign type belongs to.
+	 * @param string                    $name        Name of the marketing campaign type.
+	 * @param string                    $description Description of the marketing campaign type.
+	 * @param string                    $create_url  The URL to the create campaign page.
+	 * @param string                    $icon_url    The URL to an image/icon for the campaign type.
+	 */
+	public function __construct( string $id, MarketingChannelInterface $channel, string $name, string $description, string $create_url, string $icon_url ) {
+		$this->id          = $id;
+		$this->channel     = $channel;
+		$this->name        = $name;
+		$this->description = $description;
+		$this->create_url  = $create_url;
+		$this->icon_url    = $icon_url;
+	}
+
+	/**
+	 * Returns the marketing campaign's unique identifier.
+	 *
+	 * @return string
+	 */
+	public function get_id(): string {
+		return $this->id;
+	}
+
+	/**
+	 * Returns the marketing channel that this campaign type belongs to.
+	 *
+	 * @return MarketingChannelInterface
+	 */
+	public function get_channel(): MarketingChannelInterface {
+		return $this->channel;
+	}
+
+	/**
+	 * Returns the name of the marketing campaign type.
+	 *
+	 * @return string
+	 */
+	public function get_name(): string {
+		return $this->name;
+	}
+
+	/**
+	 * Returns the description of the marketing campaign type.
+	 *
+	 * @return string
+	 */
+	public function get_description(): string {
+		return $this->description;
+	}
+
+	/**
+	 * Returns the URL to the create campaign page.
+	 *
+	 * @return string
+	 */
+	public function get_create_url(): string {
+		return $this->create_url;
+	}
+
+	/**
+	 * Returns the URL to an image/icon for the campaign type.
+	 *
+	 * @return string
+	 */
+	public function get_icon_url(): string {
+		return $this->icon_url;
+	}
+}

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

@@ -73,6 +73,13 @@ interface MarketingChannelInterface {
 	 */
 	public function get_errors_count(): int;
 
+	/**
+	 * Returns an array of marketing campaign types that the channel supports.
+	 *
+	 * @return MarketingCampaignType[] Array of marketing campaign type objects.
+	 */
+	public function get_supported_campaign_types(): array;
+
 	/**
 	 * Returns an array of the channel's marketing campaigns.
 	 *