From 0907ed4894c156522726124c3dcb489c79af33c6 Mon Sep 17 00:00:00 2001
From: Gary Pendergast <pento@git.wordpress.org>
Date: Fri, 27 Apr 2018 03:05:40 +0000
Subject: [PATCH] REST API: Include `viewable` attribute on Post Type resource
 for `edit` context

For the block editor to be able to expose the Preview button correctly, it needs to know the `is_post_type_viewable()` setting, this change adds it to the Post Type response.

Props danielbachhuber.
Fixes #43739.



git-svn-id: https://develop.svn.wordpress.org/trunk@43007 602fd350-edb4-49c9-b593-d223f7449a82
---
 .../endpoints/class-wp-rest-post-types-controller.php  |  7 +++++++
 .../tests/rest-api/rest-post-types-controller.php      | 10 +++++++++-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-post-types-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-post-types-controller.php
index 203cea2530..de0ccab598 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-post-types-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-post-types-controller.php
@@ -159,6 +159,7 @@ class WP_REST_Post_Types_Controller extends WP_REST_Controller {
 			'capabilities' => $post_type->cap,
 			'description'  => $post_type->description,
 			'hierarchical' => $post_type->hierarchical,
+			'viewable'     => is_post_type_viewable( $post_type ),
 			'labels'       => $post_type->labels,
 			'name'         => $post_type->label,
 			'slug'         => $post_type->name,
@@ -229,6 +230,12 @@ class WP_REST_Post_Types_Controller extends WP_REST_Controller {
 					'context'     => array( 'view', 'edit' ),
 					'readonly'    => true,
 				),
+				'viewable'     => array(
+					'description' => __( 'Whether or not the post type can be viewed.' ),
+					'type'        => 'boolean',
+					'context'     => array( 'edit' ),
+					'readonly'    => true,
+				),
 				'labels'       => array(
 					'description' => __( 'Human-readable labels for the post type for various contexts.' ),
 					'type'        => 'object',
diff --git a/tests/phpunit/tests/rest-api/rest-post-types-controller.php b/tests/phpunit/tests/rest-api/rest-post-types-controller.php
index dfb233bf2e..8ef7f4202c 100644
--- a/tests/phpunit/tests/rest-api/rest-post-types-controller.php
+++ b/tests/phpunit/tests/rest-api/rest-post-types-controller.php
@@ -128,10 +128,11 @@ class WP_Test_REST_Post_Types_Controller extends WP_Test_REST_Controller_Testcas
 		$response   = rest_get_server()->dispatch( $request );
 		$data       = $response->get_data();
 		$properties = $data['schema']['properties'];
-		$this->assertEquals( 9, count( $properties ) );
+		$this->assertEquals( 10, count( $properties ) );
 		$this->assertArrayHasKey( 'capabilities', $properties );
 		$this->assertArrayHasKey( 'description', $properties );
 		$this->assertArrayHasKey( 'hierarchical', $properties );
+		$this->assertArrayHasKey( 'viewable', $properties );
 		$this->assertArrayHasKey( 'labels', $properties );
 		$this->assertArrayHasKey( 'name', $properties );
 		$this->assertArrayHasKey( 'slug', $properties );
@@ -191,9 +192,16 @@ class WP_Test_REST_Post_Types_Controller extends WP_Test_REST_Controller_Testcas
 		if ( 'edit' === $context ) {
 			$this->assertEquals( $post_type_obj->cap, $data['capabilities'] );
 			$this->assertEquals( $post_type_obj->labels, $data['labels'] );
+			if ( in_array( $post_type_obj->name, array( 'post', 'page' ), true ) ) {
+				$viewable = true;
+			} else {
+				$viewable = is_post_type_viewable( $post_type_obj );
+			}
+			$this->assertEquals( $viewable, $data['viewable'] );
 			$this->assertEquals( get_all_post_type_supports( $post_type_obj->name ), $data['supports'] );
 		} else {
 			$this->assertFalse( isset( $data['capabilities'] ) );
+			$this->assertFalse( isset( $data['viewable'] ) );
 			$this->assertFalse( isset( $data['labels'] ) );
 			$this->assertFalse( isset( $data['supports'] ) );
 		}