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20
1<?php
2/**
3 * REST API endpoint for Related Posts
4 *
5 * @package automattic/jetpack
6 * @since 12.6
7 */
8
9if ( ! defined( 'ABSPATH' ) ) {
10    exit( 0 );
11}
12
13/**
14 * Class WPCOM_REST_API_V2_Endpoint_Related_Posts
15 */
16class WPCOM_REST_API_V2_Endpoint_Related_Posts extends WP_REST_Controller {
17    /**
18     * Constructor.
19     */
20    public function __construct() {
21        $this->base_api_path = 'wpcom';
22        $this->version       = 'v2';
23        $this->namespace     = $this->base_api_path . '/' . $this->version;
24        $this->rest_base     = '/related-posts';
25
26        add_action( 'rest_api_init', array( $this, 'register_routes' ) );
27    }
28
29    /**
30     * Register routes.
31     */
32    public function register_routes() {
33        register_rest_route(
34            $this->namespace,
35            $this->rest_base,
36            array(
37                'show_in_index'       => true,
38                'methods'             => WP_REST_Server::READABLE,
39                'callback'            => array( $this, 'get_options' ),
40                'permission_callback' => function () {
41                    return current_user_can( 'edit_posts' );
42                },
43            )
44        );
45
46        register_rest_route(
47            $this->namespace,
48            $this->rest_base . '/enable',
49            array(
50                'show_in_index'       => true,
51                'methods'             => WP_REST_Server::CREATABLE,
52                'callback'            => array( $this, 'enable_rp' ),
53                'permission_callback' => function () {
54                    return current_user_can( 'manage_options' );
55                },
56            )
57        );
58
59        register_rest_route(
60            $this->namespace,
61            $this->rest_base . '/(?P<id>[\d]+)',
62            array(
63                'args' => array(
64                    'id' => array(
65                        'description' => __( 'Unique identifier for the post.', 'jetpack' ),
66                        'type'        => 'integer',
67                    ),
68                ),
69                array(
70                    'show_in_index'       => true,
71                    'methods'             => WP_REST_Server::READABLE,
72                    'callback'            => array( $this, 'get_related_posts' ),
73                    'permission_callback' => array( $this, 'get_related_posts_permissions_check' ),
74                ),
75            )
76        );
77    }
78
79    /**
80     * Gets the site's Related Posts Options.
81     *
82     * @return WP_REST_Response Array of information about the site's Related Posts options.
83     * - enabled: Whether Related Posts is enabled.
84     * - options: Array of options for Related Posts.
85     */
86    public function get_options() {
87        $options = Jetpack_Options::get_option( 'relatedposts', array() );
88        $enabled = isset( $options['enabled'] ) ? (bool) $options['enabled'] : false;
89
90        return rest_ensure_response(
91            array(
92                'enabled' => $enabled,
93                'options' => $options,
94            )
95        );
96    }
97
98    /**
99     * Enables the site's Related Posts.
100     *
101     * @param WP_REST_Request $request Full data about the request.
102     *
103     * @return WP_REST_Response Array confirming the new status.
104     */
105    public function enable_rp( $request ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
106        $old_relatedposts_options                = Jetpack_Options::get_option( 'relatedposts', array() );
107        $relatedposts_options_to_save            = $old_relatedposts_options;
108        $relatedposts_options_to_save['enabled'] = true;
109
110        // Enable Related Posts.
111        $enable = Jetpack_Options::update_option( 'relatedposts', $relatedposts_options_to_save );
112
113        return rest_ensure_response(
114            array(
115                'enabled' => (bool) $enable,
116            )
117        );
118    }
119
120    /**
121     * Checks if a given request has access to get the related posts.
122     *
123     * @since 4.7.0
124     *
125     * @param WP_REST_Request $request Full details about the request.
126     * @return bool|WP_Error True if the request has read access for the related posts, WP_Error object or false otherwise.
127     */
128    public function get_related_posts_permissions_check( $request ) {
129        $post = $this->get_post( $request['id'] );
130        if ( is_wp_error( $post ) ) {
131            return $post;
132        }
133
134        if ( ! current_user_can( 'edit_post', $post->ID ) ) {
135            return new WP_Error(
136                'rest_forbidden_context',
137                __( 'Sorry, you are not allowed to get the related post.', 'jetpack' ),
138                array( 'status' => rest_authorization_required_code() )
139            );
140        }
141
142        return true;
143    }
144
145    /**
146     * Get the related posts
147     *
148     * @param WP_REST_Request $request Full data about the request.
149     * @return WP_REST_Response Array The related posts
150     */
151    public function get_related_posts( $request ) {
152        $post = $this->get_post( $request['id'] );
153        if ( is_wp_error( $post ) ) {
154            return $post;
155        }
156
157        if ( ! class_exists( 'Jetpack_RelatedPosts' ) ) {
158            require_once JETPACK__PLUGIN_DIR . 'modules/related-posts/jetpack-related-posts.php';
159        }
160        $related_posts = \Jetpack_RelatedPosts::init()->get_for_post_id( $post->ID, array( 'size' => 6 ) );
161        return rest_ensure_response( $related_posts );
162    }
163
164    /**
165     * Gets the post, if the ID is valid.
166     *
167     * @param int $id Supplied ID.
168     * @return WP_Post|WP_Error Post object if ID is valid, WP_Error otherwise.
169     */
170    public function get_post( $id ) {
171        $error = new WP_Error(
172            'rest_post_invalid_id',
173            __( 'Invalid post ID.', 'jetpack' ),
174            array( 'status' => 404 )
175        );
176
177        if ( (int) $id <= 0 ) {
178            return $error;
179        }
180
181        $post = get_post( (int) $id );
182        if ( empty( $post ) || empty( $post->ID ) ) {
183            return $error;
184        }
185
186        return $post;
187    }
188}
189
190wpcom_rest_api_v2_load_plugin( 'WPCOM_REST_API_V2_Endpoint_Related_Posts' );