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| 1 | <?php |
| 2 | /** |
| 3 | * The per-post Sharing switch in the REST API. |
| 4 | * |
| 5 | * @package automattic/jetpack-sharing-likes |
| 6 | */ |
| 7 | |
| 8 | declare( strict_types = 1 ); |
| 9 | |
| 10 | namespace Automattic\Jetpack\Sharing_Likes; |
| 11 | |
| 12 | /** |
| 13 | * Whether sharing buttons show on a given post, as a REST field on every public post type. |
| 14 | * |
| 15 | * A post can only opt out: without the meta it follows the sitewide setting, and it |
| 16 | * cannot turn sharing on where that setting has it off. |
| 17 | */ |
| 18 | final class Post_Sharing_Switch { |
| 19 | |
| 20 | /** |
| 21 | * REST field the block editor reads and writes. |
| 22 | */ |
| 23 | public const FIELD = 'jetpack_sharing_enabled'; |
| 24 | |
| 25 | /** |
| 26 | * Post meta that, when set, turns sharing buttons off on the post. |
| 27 | */ |
| 28 | public const META_KEY = 'sharing_disabled'; |
| 29 | |
| 30 | /** |
| 31 | * Post type support the block editor checks before offering the switch. |
| 32 | */ |
| 33 | public const POST_TYPE_SUPPORT = 'jetpack-sharing-buttons'; |
| 34 | |
| 35 | /** |
| 36 | * Register the field whenever the REST API starts. Safe to call more than once. |
| 37 | */ |
| 38 | public static function init(): void { |
| 39 | add_action( 'rest_api_init', array( __CLASS__, 'register_rest_field' ) ); |
| 40 | // Why this hook, at 20: see Post_Likes_Switch::init(). |
| 41 | add_action( 'restapi_theme_init', array( __CLASS__, 'register_rest_field' ), 20 ); |
| 42 | } |
| 43 | |
| 44 | /** |
| 45 | * Add the field and the post type support to every public post type. |
| 46 | */ |
| 47 | public static function register_rest_field(): void { |
| 48 | foreach ( get_post_types( array( 'public' => true ) ) as $post_type ) { |
| 49 | register_rest_field( |
| 50 | $post_type, |
| 51 | self::FIELD, |
| 52 | array( |
| 53 | 'get_callback' => array( __CLASS__, 'get_value' ), |
| 54 | 'update_callback' => array( __CLASS__, 'update_value' ), |
| 55 | 'schema' => array( |
| 56 | 'description' => __( 'Are sharing buttons enabled?', 'jetpack-sharing-likes' ), |
| 57 | 'type' => 'boolean', |
| 58 | ), |
| 59 | ) |
| 60 | ); |
| 61 | |
| 62 | add_post_type_support( $post_type, self::POST_TYPE_SUPPORT ); |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * Whether sharing buttons may show on the post. |
| 68 | * |
| 69 | * @param array $post Post data as the REST API prepared it. |
| 70 | */ |
| 71 | public static function get_value( array $post ): bool { |
| 72 | if ( ! isset( $post['id'] ) ) { |
| 73 | return false; |
| 74 | } |
| 75 | |
| 76 | return ! get_post_meta( $post['id'], self::META_KEY, true ); |
| 77 | } |
| 78 | |
| 79 | /** |
| 80 | * Clear the opt-out when enabling, set it when disabling. |
| 81 | * |
| 82 | * @param bool $enable Whether sharing buttons should show on the post. |
| 83 | * @param \WP_Post $post_object The post being updated. |
| 84 | * |
| 85 | * @return int|bool What `update_post_meta()` or `delete_post_meta()` returned. |
| 86 | */ |
| 87 | public static function update_value( $enable, $post_object ) { |
| 88 | if ( $enable ) { |
| 89 | return delete_post_meta( $post_object->ID, self::META_KEY ); |
| 90 | } |
| 91 | |
| 92 | return update_post_meta( $post_object->ID, self::META_KEY, true ); |
| 93 | } |
| 94 | } |