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8.02
1<?php //phpcs:ignore WordPress.Files.FileName.InvalidClassFileName
2/**
3 * Module Name: Likes
4 * Module Description: Let readers like your posts to show appreciation and encourage interaction.
5 * First Introduced: 2.2
6 * Sort Order: 23
7 * Requires Connection: Yes
8 * Auto Activate: No
9 * Module Tags: Social
10 * Feature: Engagement
11 * Additional Search Queries: like, likes, wordpress.com
12 *
13 * @package automattic/jetpack
14 */
15/**
16 * NOTE: While the front-end behavior currently varies, try to keep the data
17 * model here the same as on wpcom to facilitate Simple→Atomic moves and
18 * possible future work to recombine the front-ends.
19 */
20
21// phpcs:disable Universal.Files.SeparateFunctionsFromOO.Mixed -- TODO: Move classes to appropriately-named class files.
22
23use Automattic\Jetpack\Assets;
24use Automattic\Jetpack\Status\Host;
25
26if ( ! defined( 'ABSPATH' ) ) {
27    exit( 0 );
28}
29
30Assets::add_resource_hint(
31    array(
32        '//widgets.wp.com',
33        '//s0.wp.com',
34        '//0.gravatar.com',
35        '//1.gravatar.com',
36        '//2.gravatar.com',
37    ),
38    'dns-prefetch'
39);
40
41require_once __DIR__ . '/likes/jetpack-likes-master-iframe.php';
42require_once __DIR__ . '/likes/jetpack-likes-settings.php';
43
44/**
45 * Jetpack Like Class
46 */
47class Jetpack_Likes {
48    /**
49     * Jetpack_Likes_Settings object
50     *
51     * @var Jetpack_Likes_Settings
52     */
53    public $settings;
54
55    /**
56     * Initialize class
57     */
58    public static function init() {
59        static $instance = null;
60
61        if ( ! $instance ) {
62            $instance = new Jetpack_Likes();
63        }
64
65        return $instance;
66    }
67
68    /**
69     * Constructs Likes class
70     */
71    public function __construct() {
72        $this->settings = new Jetpack_Likes_Settings();
73
74        // We need to run on wp hook rather than init because we check is_amp_endpoint()
75        // when bootstrapping hooks.
76        add_action( 'wp', array( $this, 'action_init' ), 99 );
77
78        add_action( 'admin_init', array( $this, 'admin_init' ) );
79
80        add_action( 'jetpack_activate_module_likes', array( $this, 'set_social_notifications_like' ) );
81        add_action( 'jetpack_deactivate_module_likes', array( $this, 'delete_social_notifications_like' ) );
82
83        // The `enable_module_configurable` method doesn't exist in the WP.com loader implementation.
84        if ( ! ( new Host() )->is_wpcom_simple() ) {
85            Jetpack::enable_module_configurable( __FILE__ );
86        }
87
88        add_filter( 'jetpack_module_configuration_url_likes', array( $this, 'jetpack_likes_configuration_url' ) );
89        add_action( 'admin_print_scripts-settings_page_sharing', array( $this, 'load_jp_css' ) );
90        add_filter( 'sharing_show_buttons_on_row_start', array( $this, 'configuration_target_area' ) );
91
92        $publicize_active  = Jetpack::is_module_active( 'publicize' );
93        $sharedaddy_active = Jetpack::is_module_active( 'sharedaddy' );
94
95        if ( $publicize_active && ! $sharedaddy_active ) {
96            // we have a sharing page but not the global options area.
97            add_action( 'pre_admin_screen_sharing', array( $this->settings, 'sharing_block' ), 20 );
98            add_action( 'pre_admin_screen_sharing', array( $this->settings, 'updated_message' ), -10 );
99        }
100
101        if ( ! $sharedaddy_active ) {
102            add_action( 'admin_init', array( $this->settings, 'process_update_requests_if_sharedaddy_not_loaded' ) );
103            add_action( 'sharing_global_options', array( $this->settings, 'admin_settings_showbuttonon_init' ), 19 );
104            add_action( 'sharing_admin_update', array( $this->settings, 'admin_settings_showbuttonon_callback' ), 19 );
105            add_action( 'admin_init', array( $this->settings, 'add_meta_box' ) );
106        } else {
107            add_filter( 'sharing_meta_box_title', array( $this->settings, 'add_likes_to_sharing_meta_box_title' ) );
108            add_action( 'start_sharing_meta_box_content', array( $this->settings, 'meta_box_content' ) );
109        }
110
111        add_action( 'admin_init', array( $this, 'admin_discussion_likes_settings_init' ) ); // Likes notifications.
112
113        add_action( 'wp_enqueue_scripts', array( $this, 'load_styles_register_scripts' ) );
114
115        add_action( 'save_post', array( $this->settings, 'meta_box_save' ) );
116        add_action( 'edit_attachment', array( $this->settings, 'meta_box_save' ) );
117        add_action( 'sharing_global_options', array( $this->settings, 'admin_settings_init' ), 20 );
118        add_action( 'sharing_admin_update', array( $this->settings, 'admin_settings_callback' ), 20 );
119    }
120
121    /**
122     * Set the social_notifications_like option to `on` when the Likes module is activated.
123     *
124     * @since 3.7.0
125     */
126    public function set_social_notifications_like() {
127        update_option( 'social_notifications_like', 'on' );
128    }
129
130    /**
131     * Delete the social_notifications_like option that was set to `on` on module activation.
132     *
133     * @since 3.7.0
134     */
135    public function delete_social_notifications_like() {
136        delete_option( 'social_notifications_like' );
137    }
138
139    /**
140     * Overrides default configuration url
141     *
142     * @uses admin_url
143     * @return string module settings URL
144     */
145    public function jetpack_likes_configuration_url() {
146        return admin_url( 'options-general.php?page=sharing#likes' );
147    }
148
149    /**
150     * Loads Jetpack's CSS on the sharing page so we can use .jetpack-targetable
151     */
152    public function load_jp_css() {
153        /**
154        * Do we really need `admin_styles`? With the new admin UI, it's breaking some bits.
155        * Jetpack::init()->admin_styles();
156        */
157    }
158
159    /**
160     * Load scripts and styles for front end.
161     */
162    public function load_styles_register_scripts() {
163        $style_url = Assets::get_file_url_for_environment(
164            '_inc/build/likes/style.min.css',
165            'modules/likes/style.css'
166        );
167        wp_enqueue_style( 'jetpack_likes', $style_url, array(), JETPACK__VERSION );
168        $style_path = plugin_dir_path( JETPACK__PLUGIN_FILE ) . (
169            /** This filter is documented in projects/plugins/jetpack/load-jetpack.php */
170            apply_filters( 'jetpack_should_use_minified_assets', true )
171                ? '_inc/build/likes/style.min.css'
172                : 'modules/likes/style.css'
173        );
174        wp_style_add_data( 'jetpack_likes', 'path', $style_path );
175        wp_register_script(
176            'jetpack_likes_queuehandler',
177            Assets::get_file_url_for_environment(
178                '_inc/build/likes/queuehandler.min.js',
179                'modules/likes/queuehandler.js'
180            ),
181            array(),
182            JETPACK__VERSION,
183            true
184        );
185    }
186
187    /**
188     * Adds in the jetpack-targetable class so when we visit sharing#likes our like settings get highlighted by a yellow box
189     *
190     * @param string $html row heading for the sharedaddy "which page" setting.
191     * @return string $html with the jetpack-targetable class and likes id. tbody gets closed after the like settings
192     */
193    public function configuration_target_area( $html = '' ) {
194        $html = "<tbody id='likes' class='jetpack-targetable'>" . $html;
195        return $html;
196    }
197
198    /**
199     * Options to be added to the discussion page (see also admin_settings_init, etc below for Sharing settings page)
200     */
201    public function admin_discussion_likes_settings_init() {
202        // Add a temporary section, until we can move the setting out of there and with the rest of the email notification settings.
203        add_settings_section( 'likes-notifications', __( 'Likes Notifications', 'jetpack' ), array( $this, 'admin_discussion_likes_settings_section' ), 'discussion' );
204        add_settings_field( 'social-notifications', __( 'Email me whenever', 'jetpack' ), array( $this, 'admin_discussion_likes_settings_field' ), 'discussion', 'likes-notifications' );
205        // Register the setting.
206        register_setting( 'discussion', 'social_notifications_like', array( $this, 'admin_discussion_likes_settings_validate' ) );
207    }
208
209    /** Add email notification options to WordPress discussion settings */
210    public function admin_discussion_likes_settings_section() {
211        // Atypical usage here.  We emit jquery to move likes notification checkbox to be with the rest of the email notification settings.
212        ?>
213    <script type="text/javascript">
214    jQuery( function( $ )  {
215        var table = $( '#social_notifications_like' ).parents( 'table:first' ),
216            header = table.prevAll( 'h2:first' ),
217            newParent = $( '#moderation_notify' ).parent( 'label' ).parent();
218
219        if ( !table.length || !header.length || !newParent.length ) {
220            return;
221        }
222
223        newParent.append( '<br/>' ).append( table.end().parent( 'label' ).siblings().andSelf() );
224        header.remove();
225        table.remove();
226    } );
227    </script>
228        <?php
229    }
230
231    /** Check if email notifications for likes is on or off.
232     *
233     * @param string $option - which option we're checking (social_notifications_like).
234     */
235    public function admin_likes_get_option( $option ) {
236        $option_setting = get_option( $option, 'on' );
237
238        return (int) ( 'on' === $option_setting );
239    }
240
241    /** Display email notification for likes setting in WordPress' discussion settings. */
242    public function admin_discussion_likes_settings_field() {
243        $like = $this->admin_likes_get_option( 'social_notifications_like' );
244        ?>
245        <label><input type="checkbox" id="social_notifications_like" name="social_notifications_like" value="1" <?php checked( $like ); ?> /> <?php esc_html_e( 'Someone likes one of my posts', 'jetpack' ); ?></label>
246        <?php
247    }
248
249    /**
250     * Validate email notification settings.
251     *
252     * @param string $input - determines if checbox is on or off.
253     */
254    public function admin_discussion_likes_settings_validate( $input ) {
255        // If it's not set (was unchecked during form submission) or was set to off (during option update), return 'off'.
256        if ( ! $input || 'off' === $input ) {
257            return 'off';
258        }
259        // Otherwise return 'on'.
260        return 'on';
261    }
262
263    /** Initialize admin settings */
264    public function admin_init() {
265        add_filter( 'manage_posts_columns', array( $this, 'add_like_count_column' ) );
266        add_filter( 'manage_pages_columns', array( $this, 'add_like_count_column' ) );
267        add_action( 'manage_posts_custom_column', array( $this, 'likes_edit_column' ), 10, 2 );
268        add_action( 'manage_pages_custom_column', array( $this, 'likes_edit_column' ), 10, 2 );
269        add_action( 'admin_print_styles-edit.php', array( $this, 'load_admin_css' ) );
270        add_action( 'admin_print_scripts-edit.php', array( $this, 'enqueue_admin_scripts' ) );
271    }
272
273    /** Initialize action */
274    public function action_init() {
275        /*
276         * Only check if the module is enabled here because
277         * we are not currently in The Loop and do not yet have access to check
278         * the switch_like_status post meta flag for the post to be loaded.
279         */
280        if ( is_admin() || ! $this->settings->is_likes_module_enabled() ) {
281            return;
282        }
283
284        if ( ( defined( 'XMLRPC_REQUEST' ) && XMLRPC_REQUEST ) ||
285            ( defined( 'APP_REQUEST' ) && APP_REQUEST ) ||
286            ( defined( 'REST_API_REQUEST' ) && REST_API_REQUEST ) ||
287            ( defined( 'COOKIE_AUTH_REQUEST' ) && COOKIE_AUTH_REQUEST ) ||
288            ( defined( 'JABBER_SERVER' ) && JABBER_SERVER ) ) {
289            return;
290        }
291
292        if (
293            class_exists( 'Jetpack_AMP_Support' )
294            && Jetpack_AMP_Support::is_amp_request()
295        ) {
296            return;
297        }
298
299        add_filter( 'the_content', array( $this, 'post_likes' ), 30, 1 );
300        add_filter( 'the_excerpt', array( $this, 'post_likes' ), 30, 1 );
301    }
302
303    /**
304     * Load the CSS needed for the wp-admin area.
305     */
306    public function load_admin_css() {
307        ?>
308        <style type="text/css">
309            .vers img { display: none; }
310            .metabox-prefs .vers img { display: inline; }
311            .fixed .column-likes { width: 2.5em; padding: 4px 0; text-align: left; }
312            .fixed .column-stats { width: 5em; white-space: nowrap; }
313            .fixed .column-likes .post-com-count {
314                -webkit-box-sizing: border-box;
315                -moz-box-sizing: border-box;
316                box-sizing: border-box;
317                display: inline-block;
318                padding: 0 4px;
319                min-width: 2em;
320                text-align: center;
321                height: 2em;
322                margin-top: 5px;
323                -webkit-border-radius: 5px;
324                border-radius: 5px;
325                background-color: #787c82;
326                color: #FFF;
327                font-size: 11px;
328                line-height: 21px;
329            }
330            .fixed .column-likes .post-com-count::after { border: none !important; }
331            .fixed .column-likes .post-com-count:hover { background-color: #2271b1; }
332            .fixed .column-likes .vers::before {
333                font: normal 20px/1 dashicons;
334                content: '\f155';
335                speak: none;
336                -webkit-font-smoothing: antialiased;
337                -moz-osx-font-smoothing: grayscale;
338            }
339            @media screen and (max-width: 782px) {
340                .fixed .column-likes {
341                    display: none;
342                }
343            }
344        </style>
345        <?php
346    }
347
348    /**
349     * Load the JS required for loading the like counts.
350     */
351    public function enqueue_admin_scripts() {
352        if ( empty( $_GET['post_type'] ) || 'post' === $_GET['post_type'] || 'page' === $_GET['post_type'] ) { //phpcs:ignore WordPress.Security.NonceVerification.Recommended
353            wp_enqueue_script(
354                'likes-post-count',
355                Assets::get_file_url_for_environment(
356                    '_inc/build/likes/post-count.min.js',
357                    'modules/likes/post-count.js'
358                ),
359                array( 'jquery' ),
360                JETPACK__VERSION,
361                false
362            );
363            wp_enqueue_script(
364                'likes-post-count-jetpack',
365                Assets::get_file_url_for_environment(
366                    '_inc/build/likes/post-count-jetpack.min.js',
367                    'modules/likes/post-count-jetpack.js'
368                ),
369                array( 'jquery', 'likes-post-count' ),
370                JETPACK__VERSION,
371                false
372            );
373        }
374    }
375
376    /**
377     * Add "Likes" column data to the post edit table in wp-admin.
378     *
379     * @param string $column_name - name of the column.
380     * @param int    $post_id - the post id.
381     */
382    public function likes_edit_column( $column_name, $post_id ) {
383        if ( 'likes' === $column_name ) {
384
385            $blog_id = Jetpack_Options::get_option( 'id' );
386
387            $permalink = get_permalink( get_the_ID() );
388            ?>
389            <a title="" data-post-id="<?php echo (int) $post_id; ?>" class="post-com-count post-like-count" id="post-like-count-<?php echo (int) $post_id; ?>" data-blog-id="<?php echo (int) $blog_id; ?>" href="<?php echo esc_url( $permalink ); ?>#like-<?php echo (int) $post_id; ?>">
390                <span class="comment-count">0</span>
391            </a>
392            <?php
393        }
394    }
395
396    /**
397     * Add a "Likes" column header to the post edit table in wp-admin.
398     *
399     * @param array $columns - array of columns in wp-admin.
400     */
401    public function add_like_count_column( $columns ) {
402        $date = $columns['date'];
403        unset( $columns['date'] );
404
405        $columns['likes'] = '<span class="vers"><img title="' . esc_attr__( 'Likes', 'jetpack' ) . '" alt="' . esc_attr__( 'Likes', 'jetpack' ) . '" src="//s0.wordpress.com/i/like-grey-icon.png" /><span class="screen-reader-text">' . __( 'Likes', 'jetpack' ) . '</span></span>';
406        $columns['date']  = $date;
407
408        return $columns;
409    }
410
411    /**
412     * Append like button to content.
413     *
414     * @param string $content - content of the page.
415     */
416    public function post_likes( $content ) {
417        global $wp_current_filter;
418        $post_id = get_the_ID();
419
420        if ( ! is_numeric( $post_id ) || ! $this->settings->is_likes_visible() ) {
421            return $content;
422        }
423
424        // Do not output Likes on requests for ActivityPub requests.
425        if (
426            function_exists( '\Activitypub\is_activitypub_request' )
427            && \Activitypub\is_activitypub_request()
428        ) {
429            return $content;
430        }
431
432        // Ensure we don't display like button on post excerpts that are hooked inside the post content
433        if ( in_array( 'the_excerpt', (array) $wp_current_filter, true ) &&
434            in_array( 'the_content', (array) $wp_current_filter, true ) ) {
435            return $content;
436        }
437
438        $blog_id   = Jetpack_Options::get_option( 'id' );
439        $url       = home_url();
440        $url_parts = wp_parse_url( $url );
441        $domain    = $url_parts['host'];
442
443        // Make sure to include the `queuehandler` scripts before the iframe otherwise the script won't find the iframe.
444        if ( ! has_action( 'wp_footer', 'jetpack_likes_master_iframe' ) ) {
445            add_action( 'wp_footer', 'jetpack_likes_master_iframe', 21 );
446        }
447
448        /**
449        * If the same post appears more then once on a page the page goes crazy
450        * we need a slightly more unique id / name for the widget wrapper.
451        */
452        $uniqid   = uniqid();
453        $src      = sprintf( 'https://widgets.wp.com/likes/?ver=%1$s#blog_id=%2$d&amp;post_id=%3$d&amp;origin=%4$s&amp;obj_id=%2$d-%3$d-%5$s', rawurlencode( JETPACK__VERSION ), $blog_id, $post_id, $domain, $uniqid );
454        $name     = sprintf( 'like-post-frame-%1$d-%2$d-%3$s', $blog_id, $post_id, $uniqid );
455        $wrapper  = sprintf( 'like-post-wrapper-%1$d-%2$d-%3$s', $blog_id, $post_id, $uniqid );
456        $headline = sprintf(
457            /** This filter is already documented in modules/sharedaddy/sharing-service.php */
458            apply_filters( 'jetpack_sharing_headline_html', '<h3 class="sd-title">%s</h3>', esc_html__( 'Like this:', 'jetpack' ), 'likes' ),
459            esc_html__( 'Like this:', 'jetpack' )
460        );
461
462        $title = esc_html__( 'Like or Reblog', 'jetpack' );
463
464        /** This filter is documented in modules/likes/jetpack-likes-master-iframe.php */
465        $src = apply_filters( 'jetpack_likes_iframe_src', $src );
466
467        $html  = "<div class='sharedaddy sd-block sd-like jetpack-likes-widget-wrapper jetpack-likes-widget-unloaded' id='$wrapper' data-src='$src' data-name='$name' data-title='$title'>";
468        $html .= $headline;
469        $html .= "<div class='likes-widget-placeholder post-likes-widget-placeholder' style='height: 55px;'><span class='button'><span>" . esc_html__( 'Like', 'jetpack' ) . '</span></span> <span class="loading">' . esc_html__( 'Loading...', 'jetpack' ) . '</span></div>';
470        $html .= "<span class='sd-text-color'></span><a class='sd-link-color'></a>";
471        $html .= '</div>';
472
473        // Let's make sure that the script is enqueued.
474        wp_enqueue_script( 'jetpack_likes_queuehandler' );
475
476        return $content . $html;
477    }
478}
479
480/**
481 * Callback to get the value for the jetpack_likes_enabled field.
482 *
483 * Warning: this behavior is somewhat complicated!
484 * When the switch_like_status post_meta is unset, we follow the global setting in Sharing.
485 * When it is set to 0, we disable likes on the post, regardless of the global setting.
486 * When it is set to 1, we enable likes on the post, regardless of the global setting.
487 *
488 * @param array $post - post data we're checking.
489 *
490 * @return bool
491 */
492function jetpack_post_likes_get_value( array $post ) {
493    if ( ! isset( $post['id'] ) ) {
494        return false;
495    }
496
497    $post_likes_switched = get_post_meta( $post['id'], 'switch_like_status', true );
498
499    /** This filter is documented in modules/jetpack-likes-settings.php */
500    $sitewide_likes_enabled = (bool) apply_filters( 'wpl_is_enabled_sitewide', ! get_option( 'disabled_likes' ) );
501
502    // An empty string: post meta was not set, so go with the global setting.
503    if ( '' === $post_likes_switched ) {
504        return $sitewide_likes_enabled;
505    } elseif ( '0' === $post_likes_switched ) { // User overrode the global setting to disable likes.
506        return false;
507    } elseif ( '1' === $post_likes_switched ) { // User overrode the global setting to enable likes.
508        return true;
509    }
510    // No default fallback, let's stay explicit.
511}
512
513/**
514 * Callback to set switch_like_status post_meta when jetpack_likes_enabled is updated.
515 *
516 * Warning: this behavior is somewhat complicated!
517 * When the switch_like_status post_meta is unset, we follow the global setting in Sharing.
518 * When it is set to 0, we disable likes on the post, regardless of the global setting.
519 * When it is set to 1, we enable likes on the post, regardless of the global setting.
520 *
521 * @param bool   $enable_post_likes - checks if post likes are enabled.
522 * @param object $post_object - object containing post data.
523 */
524function jetpack_post_likes_update_value( $enable_post_likes, $post_object ) {
525    /** This filter is documented in modules/jetpack-likes-settings.php */
526    $sitewide_likes_enabled = (bool) apply_filters( 'wpl_is_enabled_sitewide', ! get_option( 'disabled_likes' ) );
527
528    $should_switch_status = $enable_post_likes !== $sitewide_likes_enabled;
529
530    if ( $should_switch_status ) {
531        // Set the meta to 0 if the user wants to disable likes, 1 if user wants to enable.
532        $switch_like_status = ( $enable_post_likes ? 1 : 0 );
533        return update_post_meta( $post_object->ID, 'switch_like_status', $switch_like_status );
534    } else {
535        // Unset the meta otherwise.
536        return delete_post_meta( $post_object->ID, 'switch_like_status' );
537    }
538}
539
540/**
541 * Add Likes post_meta to the REST API Post response.
542 *
543 * @action rest_api_init
544 * @uses register_rest_field
545 * @link https://developer.wordpress.org/rest-api/extending-the-rest-api/modifying-responses/
546 */
547function jetpack_post_likes_register_rest_field() {
548    $post_types = get_post_types( array( 'public' => true ) );
549    foreach ( $post_types as $post_type ) {
550        register_rest_field(
551            $post_type,
552            'jetpack_likes_enabled',
553            array(
554                'get_callback'    => 'jetpack_post_likes_get_value',
555                'update_callback' => 'jetpack_post_likes_update_value',
556                'schema'          => array(
557                    'description' => __( 'Are Likes enabled?', 'jetpack' ),
558                    'type'        => 'boolean',
559                ),
560            )
561        );
562
563        /**
564         * Ensures all public internal post-types support `likes`
565         * This feature support flag is used by the REST API and Gutenberg.
566         */
567        add_post_type_support( $post_type, 'jetpack-post-likes' );
568    }
569}
570
571// Add Likes post_meta to the REST API Post response.
572add_action( 'rest_api_init', 'jetpack_post_likes_register_rest_field' );
573
574// Some CPTs (e.g. Jetpack portfolios and testimonials) get registered with
575// restapi_theme_init because they depend on theme support, so let's also hook to that.
576add_action( 'restapi_theme_init', 'jetpack_post_likes_register_rest_field', 20 );
577
578Jetpack_Likes::init();