Add Product endpoint to ExtendSchema (#6122)

* Added ProductSchema Identifier

* Updated get_extended_schema & get_item_response

* Test for extensions field on products

* Updated endpoint extend Readme

docs/extensibility/available-endpoints-to-extend.md

@@ -30,6 +30,19 @@ The items endpoint, which is also available on `wc/store/cart` inside the `items
 
 -   `CartItemSchema::IDENTIFIER`
 
+## `wc/store/products`
+
+The main products endpoint is extensible via ExtendSchema. The data is available via the `extensions` key for each `product` in the response array.
+
+### Passed Parameters:
+
+-   `data_callback`: `$product`.
+-   `schema_callback` none.
+
+### Key:
+
+-   `ProductSchema::IDENTIFIER`
+
 <!-- FEEDBACK -->
 ---
 

src/StoreApi/Schemas/ExtendSchema.php

@@ -4,6 +4,7 @@
 use Automattic\WooCommerce\StoreApi\Schemas\V1\CartItemSchema;
 use Automattic\WooCommerce\StoreApi\Schemas\V1\CartSchema;
 use Automattic\WooCommerce\StoreApi\Schemas\V1\CheckoutSchema;
+use Automattic\WooCommerce\StoreApi\Schemas\V1\ProductSchema;
 use Automattic\WooCommerce\StoreApi\Formatters;
 
 /**
@@ -26,6 +27,7 @@ final class ExtendSchema {
 		CartItemSchema::IDENTIFIER,
 		CartSchema::IDENTIFIER,
 		CheckoutSchema::IDENTIFIER,
+		ProductSchema::IDENTIFIER,
 	];
 
 	/**

src/StoreApi/Schemas/V1/ProductSchema.php

@@ -435,6 +435,7 @@ public function get_properties() {
 					],
 				],
 			],
+			self::EXTENDING_KEY   => $this->get_extended_schema( self::IDENTIFIER ),
 		];
 	}
 
@@ -479,6 +480,8 @@ public function get_item_response( $product ) {
 				],
 				( new QuantityLimits() )->get_add_to_cart_limits( $product )
 			),
+			self::EXTENDING_KEY   => $this->get_extended_data( self::IDENTIFIER, $product ),
+
 		];
 	}
 

tests/php/StoreApi/Routes/Products.php

@@ -89,6 +89,7 @@ public function test_get_items() {
 		$this->assertArrayHasKey( 'is_purchasable', $data[0] );
 		$this->assertArrayHasKey( 'is_in_stock', $data[0] );
 		$this->assertArrayHasKey( 'add_to_cart', $data[0] );
+		$this->assertArrayHasKey( 'extensions', $data[0] );
 	}
 
 	/**