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<?php
class Jetpack_RelatedPosts {
const VERSION = '20150408';
const SHORTCODE = 'jetpack-related-posts';
private static $instance = null;
private static $instance_raw = null;
/**
* Creates and returns a static instance of Jetpack_RelatedPosts.
*
* @return Jetpack_RelatedPosts
*/
public static function init() {
if ( ! self::$instance ) {
if ( class_exists('WPCOM_RelatedPosts') && method_exists( 'WPCOM_RelatedPosts', 'init' ) ) {
self::$instance = WPCOM_RelatedPosts::init();
} else {
self::$instance = new Jetpack_RelatedPosts(
get_current_blog_id(),
Jetpack_Options::get_option( 'id' )
);
}
}
return self::$instance;
}
/**
* Creates and returns a static instance of Jetpack_RelatedPosts_Raw.
*
* @return Jetpack_RelatedPosts
*/
public static function init_raw() {
if ( ! self::$instance_raw ) {
if ( class_exists('WPCOM_RelatedPosts') && method_exists( 'WPCOM_RelatedPosts', 'init_raw' ) ) {
self::$instance_raw = WPCOM_RelatedPosts::init_raw();
} else {
self::$instance_raw = new Jetpack_RelatedPosts_Raw(
get_current_blog_id(),
Jetpack_Options::get_option( 'id' )
);
}
}
return self::$instance_raw;
}
protected $_blog_id_local;
protected $_blog_id_wpcom;
protected $_options;
protected $_allow_feature_toggle;
protected $_blog_charset;
protected $_convert_charset;
protected $_previous_post_id;
protected $_found_shortcode = false;
/**
* Constructor for Jetpack_RelatedPosts.
*
* @param int $blog_id_local
* @param int $blog_id_wpcom
* @uses get_option, add_action, apply_filters
* @return null
*/
public function __construct( $blog_id_local, $blog_id_wpcom ) {
$this->_blog_id_local = $blog_id_local;
$this->_blog_id_wpcom = $blog_id_wpcom;
$this->_blog_charset = get_option( 'blog_charset' );
$this->_convert_charset = ( function_exists( 'iconv' ) && ! preg_match( '/^utf\-?8$/i', $this->_blog_charset ) );
add_action( 'admin_init', array( $this, 'action_admin_init' ) );
add_action( 'wp', array( $this, 'action_frontend_init' ) );
if ( ! class_exists( 'Jetpack_Media_Summary' ) ) {
jetpack_require_lib( 'class.media-summary' );
}
// Add Related Posts to the REST API Post response.
if ( function_exists( 'register_rest_field' ) ) {
add_action( 'rest_api_init', array( $this, 'rest_register_related_posts' ) );
}
}
/**
* =================
* ACTIONS & FILTERS
* =================
*/
/**
* Add a checkbox field to Settings > Reading for enabling related posts.
*
* @action admin_init
* @uses add_settings_field, __, register_setting, add_action
* @return null
*/
public function action_admin_init() {
// Add the setting field [jetpack_relatedposts] and place it in Settings > Reading
add_settings_field( 'jetpack_relatedposts', '<span id="jetpack_relatedposts">' . __( 'Related posts', 'jetpack' ) . '</span>', array( $this, 'print_setting_html' ), 'reading' );
register_setting( 'reading', 'jetpack_relatedposts', array( $this, 'parse_options' ) );
add_action('admin_head', array( $this, 'print_setting_head' ) );
if( 'options-reading.php' == $GLOBALS['pagenow'] ) {
// Enqueue style for live preview on the reading settings page
$this->_enqueue_assets( false, true );
}
}
/**
* Load related posts assets if it's a elegiable front end page or execute search and return JSON if it's an endpoint request.
*
* @global $_GET
* @action wp
* @uses add_shortcode, get_the_ID
* @returns null
*/
public function action_frontend_init() {
// Add a shortcode handler that outputs nothing, this gets overridden later if we can display related content
add_shortcode( self::SHORTCODE, array( $this, 'get_target_html_unsupported' ) );
if ( ! $this->_enabled_for_request() )
return;
if ( isset( $_GET['relatedposts'] ) ) {
$excludes = array();
if ( isset( $_GET['relatedposts_exclude'] ) ) {
if ( is_string( $_GET['relatedposts_exclude'] ) ) {
$excludes = explode( ',', $_GET['relatedposts_exclude'] );
} elseif ( is_array( $_GET['relatedposts_exclude'] ) ) {
$excludes = array_values( $_GET['relatedposts_exclude'] );
}
$excludes = array_unique( array_filter( array_map( 'absint', $excludes ) ) );
}
$this->_action_frontend_init_ajax( $excludes );
} else {
if ( isset( $_GET['relatedposts_hit'], $_GET['relatedposts_origin'], $_GET['relatedposts_position'] ) ) {
$this->_log_click( $_GET['relatedposts_origin'], get_the_ID(), $_GET['relatedposts_position'] );
$this->_previous_post_id = (int) $_GET['relatedposts_origin'];
}
$this->_action_frontend_init_page();
}
}
/**
* Render insertion point.
*
* @since 4.2.0
*
* @return string
*/
public function get_headline() {
$options = $this->get_options();
if ( $options['show_headline'] ) {
$headline = sprintf(
/** This filter is already documented in modules/sharedaddy/sharing-service.php */
apply_filters( 'jetpack_sharing_headline_html', '<h3 class="jp-relatedposts-headline"><em>%s</em></h3>', esc_html( $options['headline'] ), 'related-posts' ),
esc_html( $options['headline'] )
);
} else {
$headline = '';
}
return $headline;
}
/**
* Adds a target to the post content to load related posts into if a shortcode for it did not already exist.
*
* @filter the_content
* @param string $content
* @returns string
*/
public function filter_add_target_to_dom( $content ) {
if ( !$this->_found_shortcode ) {
$content .= "\n" . $this->get_target_html();
}
return $content;
}
/**
* Looks for our shortcode on the unfiltered content, this has to execute early.
*
* @filter the_content
* @param string $content
* @uses has_shortcode
* @returns string
*/
public function test_for_shortcode( $content ) {
$this->_found_shortcode = has_shortcode( $content, self::SHORTCODE );
return $content;
}
/**
* Returns the HTML for the related posts section.
*
* @uses esc_html__, apply_filters
* @returns string
*/
public function get_target_html() {
require_once JETPACK__PLUGIN_DIR . '/sync/class.jetpack-sync-settings.php';
if ( Jetpack_Sync_Settings::is_syncing() ) {
return '';
}
/**
* Filter the Related Posts headline.
*
* @module related-posts
*
* @since 3.0.0
*
* @param string $headline Related Posts heading.
*/
$headline = apply_filters( 'jetpack_relatedposts_filter_headline', $this->get_headline() );
if ( $this->_previous_post_id ) {
$exclude = "data-exclude='{$this->_previous_post_id}'";
} else {
$exclude = "";
}
return <<<EOT
<div id='jp-relatedposts' class='jp-relatedposts' $exclude>
$headline
</div>
EOT;
}
/**
* Returns the HTML for the related posts section if it's running in the loop or other instances where we don't support related posts.
*
* @returns string
*/
public function get_target_html_unsupported() {
require_once JETPACK__PLUGIN_DIR . '/sync/class.jetpack-sync-settings.php';
if ( Jetpack_Sync_Settings::is_syncing() ) {
return '';
}
return "\n\n<!-- Jetpack Related Posts is not supported in this context. -->\n\n";
}
/**
* ========================
* PUBLIC UTILITY FUNCTIONS
* ========================
*/
/**
* Gets options set for Jetpack_RelatedPosts and merge with defaults.
*
* @uses Jetpack_Options::get_option, apply_filters
* @return array
*/
public function get_options() {
if ( null === $this->_options ) {
$this->_options = Jetpack_Options::get_option( 'relatedposts', array() );
if ( ! is_array( $this->_options ) )
$this->_options = array();
if ( ! isset( $this->_options['enabled'] ) )
$this->_options['enabled'] = true;
if ( ! isset( $this->_options['show_headline'] ) )
$this->_options['show_headline'] = true;
if ( ! isset( $this->_options['show_thumbnails'] ) )
$this->_options['show_thumbnails'] = false;
if ( ! isset( $this->_options['show_date'] ) ) {
$this->_options['show_date'] = true;
}
if ( ! isset( $this->_options['show_context'] ) ) {
$this->_options['show_context'] = true;
}
if ( ! isset( $this->_options['layout'] ) ) {
$this->_options['layout'] = 'grid';
}
if ( ! isset( $this->_options['headline'] ) ) {
$this->_options['headline'] = esc_html__( 'Related', 'jetpack' );
}
if ( empty( $this->_options['size'] ) || (int)$this->_options['size'] < 1 )
$this->_options['size'] = 3;
/**
* Filter Related Posts basic options.
*
* @module related-posts
*
* @since 2.8.0
*
* @param array $this->_options Array of basic Related Posts options.
*/
$this->_options = apply_filters( 'jetpack_relatedposts_filter_options', $this->_options );
}
return $this->_options;
}
public function get_option( $option_name ) {
$options = $this->get_options();
if ( isset( $options[ $option_name ] ) ) {
return $options[ $option_name ];
}
return false;
}
/**
* Parses input and returns normalized options array.
*
* @param array $input
* @uses self::get_options
* @return array
*/
public function parse_options( $input ) {
$current = $this->get_options();
if ( !is_array( $input ) )
$input = array();
if (
! isset( $input['enabled'] )
|| isset( $input['show_date'] )
|| isset( $input['show_context'] )
|| isset( $input['layout'] )
|| isset( $input['headline'] )
) {
$input['enabled'] = '1';
}
if ( '1' == $input['enabled'] ) {
$current['enabled'] = true;
$current['show_headline'] = ( isset( $input['show_headline'] ) && '1' == $input['show_headline'] );
$current['show_thumbnails'] = ( isset( $input['show_thumbnails'] ) && '1' == $input['show_thumbnails'] );
$current['show_date'] = ( isset( $input['show_date'] ) && '1' == $input['show_date'] );
$current['show_context'] = ( isset( $input['show_context'] ) && '1' == $input['show_context'] );
$current['layout'] = isset( $input['layout'] ) && in_array( $input['layout'], array( 'grid', 'list' ), true ) ? $input['layout'] : 'grid';
$current['headline'] = isset( $input['headline'] ) ? $input['headline'] : esc_html__( 'Related', 'jetpack' );
} else {
$current['enabled'] = false;
}
if ( isset( $input['size'] ) && (int)$input['size'] > 0 )
$current['size'] = (int)$input['size'];
else
$current['size'] = null;
return $current;
}
/**
* HTML for admin settings page.
*
* @uses self::get_options, checked, esc_html__
* @returns null
*/
public function print_setting_html() {
$options = $this->get_options();
$ui_settings_template = <<<EOT
<ul id="settings-reading-relatedposts-customize">
<li>
<label><input name="jetpack_relatedposts[show_headline]" type="checkbox" value="1" %s /> %s</label>
</li>
<li>
<label><input name="jetpack_relatedposts[show_thumbnails]" type="checkbox" value="1" %s /> %s</label>
</li>
<li>
<label><input name="jetpack_relatedposts[show_date]" type="checkbox" value="1" %s /> %s</label>
</li>
<li>
<label><input name="jetpack_relatedposts[show_context]" type="checkbox" value="1" %s /> %s</label>
</li>
</ul>
<div id='settings-reading-relatedposts-preview'>
%s
<div id="jp-relatedposts" class="jp-relatedposts"></div>
</div>
EOT;
$ui_settings = sprintf(
$ui_settings_template,
checked( $options['show_headline'], true, false ),
esc_html__( 'Show a "Related" header to more clearly separate the related section from posts', 'jetpack' ),
checked( $options['show_thumbnails'], true, false ),
esc_html__( 'Use a large and visually striking layout', 'jetpack' ),
checked( $options['show_date'], true, false ),
esc_html__( 'Show entry date', 'jetpack' ),
checked( $options['show_context'], true, false ),
esc_html__( 'Show context (category or tag)', 'jetpack' ),
esc_html__( 'Preview:', 'jetpack' )
);
if ( !$this->_allow_feature_toggle() ) {
$template = <<<EOT
<input type="hidden" name="jetpack_relatedposts[enabled]" value="1" />
%s
EOT;
printf(
$template,
$ui_settings
);
} else {
$template = <<<EOT
<ul id="settings-reading-relatedposts">
<li>
<label><input type="radio" name="jetpack_relatedposts[enabled]" value="0" class="tog" %s /> %s</label>
</li>
<li>
<label><input type="radio" name="jetpack_relatedposts[enabled]" value="1" class="tog" %s /> %s</label>
%s
</li>
</ul>
EOT;
printf(
$template,
checked( $options['enabled'], false, false ),
esc_html__( 'Hide related content after posts', 'jetpack' ),
checked( $options['enabled'], true, false ),
esc_html__( 'Show related content after posts', 'jetpack' ),
$ui_settings
);
}
}
/**
* Head JS/CSS for admin settings page.
*
* @uses esc_html__
* @returns null
*/
public function print_setting_head() {
// only dislay the Related Posts JavaScript on the Reading Settings Admin Page
$current_screen = get_current_screen();
if ( is_null( $current_screen ) ) {
return;
}
if( 'options-reading' != $current_screen->id )
return;
$related_headline = sprintf(
'<h3 class="jp-relatedposts-headline"><em>%s</em></h3>',
esc_html__( 'Related', 'jetpack' )
);
$href_params = 'class="jp-relatedposts-post-a" href="#jetpack_relatedposts" rel="nofollow" data-origin="0" data-position="0"';
$related_with_images = <<<EOT
<div class="jp-relatedposts-items jp-relatedposts-items-visual">
<div class="jp-relatedposts-post jp-relatedposts-post0 jp-relatedposts-post-thumbs" data-post-id="0" data-post-format="image">
<a $href_params>
<img class="jp-relatedposts-post-img" src="https://jetpackme.files.wordpress.com/2014/08/1-wpios-ipad-3-1-viewsite.png?w=350&amp;h=200&amp;crop=1" width="350" alt="Big iPhone/iPad Update Now Available" scale="0">
</a>
<h4 class="jp-relatedposts-post-title">
<a $href_params>Big iPhone/iPad Update Now Available</a>
</h4>
<p class="jp-relatedposts-post-excerpt">Big iPhone/iPad Update Now Available</p>
<p class="jp-relatedposts-post-context">In "Mobile"</p>
</div>
<div class="jp-relatedposts-post jp-relatedposts-post1 jp-relatedposts-post-thumbs" data-post-id="0" data-post-format="image">
<a $href_params>
<img class="jp-relatedposts-post-img" src="https://jetpackme.files.wordpress.com/2014/08/wordpress-com-news-wordpress-for-android-ui-update2.jpg?w=350&amp;h=200&amp;crop=1" width="350" alt="The WordPress for Android App Gets a Big Facelift" scale="0">
</a>
<h4 class="jp-relatedposts-post-title">
<a $href_params>The WordPress for Android App Gets a Big Facelift</a>
</h4>
<p class="jp-relatedposts-post-excerpt">The WordPress for Android App Gets a Big Facelift</p>
<p class="jp-relatedposts-post-context">In "Mobile"</p>
</div>
<div class="jp-relatedposts-post jp-relatedposts-post2 jp-relatedposts-post-thumbs" data-post-id="0" data-post-format="image">
<a $href_params>
<img class="jp-relatedposts-post-img" src="https://jetpackme.files.wordpress.com/2014/08/videopresswedding.jpg?w=350&amp;h=200&amp;crop=1" width="350" alt="Upgrade Focus: VideoPress For Weddings" scale="0">
</a>
<h4 class="jp-relatedposts-post-title">
<a $href_params>Upgrade Focus: VideoPress For Weddings</a>
</h4>
<p class="jp-relatedposts-post-excerpt">Upgrade Focus: VideoPress For Weddings</p>
<p class="jp-relatedposts-post-context">In "Upgrade"</p>
</div>
</div>
EOT;
$related_with_images = str_replace( "\n", '', $related_with_images );
$related_without_images = <<<EOT
<div class="jp-relatedposts-items jp-relatedposts-items-minimal">
<p class="jp-relatedposts-post jp-relatedposts-post0" data-post-id="0" data-post-format="image">
<span class="jp-relatedposts-post-title"><a $href_params>Big iPhone/iPad Update Now Available</a></span>
<span class="jp-relatedposts-post-context">In "Mobile"</span>
</p>
<p class="jp-relatedposts-post jp-relatedposts-post1" data-post-id="0" data-post-format="image">
<span class="jp-relatedposts-post-title"><a $href_params>The WordPress for Android App Gets a Big Facelift</a></span>
<span class="jp-relatedposts-post-context">In "Mobile"</span>
</p>
<p class="jp-relatedposts-post jp-relatedposts-post2" data-post-id="0" data-post-format="image">
<span class="jp-relatedposts-post-title"><a $href_params>Upgrade Focus: VideoPress For Weddings</a></span>
<span class="jp-relatedposts-post-context">In "Upgrade"</span>
</p>
</div>
EOT;
$related_without_images = str_replace( "\n", '', $related_without_images );
if ( $this->_allow_feature_toggle() ) {
$extra_css = '#settings-reading-relatedposts-customize { padding-left:2em; margin-top:.5em; }';
} else {
$extra_css = '';
}
echo <<<EOT
<style type="text/css">
#settings-reading-relatedposts .disabled { opacity:.5; filter:Alpha(opacity=50); }
#settings-reading-relatedposts-preview .jp-relatedposts { background:#fff; padding:.5em; width:75%; }
$extra_css
</style>
<script type="text/javascript">
jQuery( document ).ready( function($) {
var update_ui = function() {
var is_enabled = true;
if ( 'radio' == $( 'input[name="jetpack_relatedposts[enabled]"]' ).attr('type') ) {
if ( '0' == $( 'input[name="jetpack_relatedposts[enabled]"]:checked' ).val() ) {
is_enabled = false;
}
}
if ( is_enabled ) {
$( '#settings-reading-relatedposts-customize' )
.removeClass( 'disabled' )
.find( 'input' )
.attr( 'disabled', false );
$( '#settings-reading-relatedposts-preview' )
.removeClass( 'disabled' );
} else {
$( '#settings-reading-relatedposts-customize' )
.addClass( 'disabled' )
.find( 'input' )
.attr( 'disabled', true );
$( '#settings-reading-relatedposts-preview' )
.addClass( 'disabled' );
}
};
var update_preview = function() {
var html = '';
if ( $( 'input[name="jetpack_relatedposts[show_headline]"]:checked' ).length ) {
html += '$related_headline';
}
if ( $( 'input[name="jetpack_relatedposts[show_thumbnails]"]:checked' ).length ) {
html += '$related_with_images';
} else {
html += '$related_without_images';
}
$( '#settings-reading-relatedposts-preview .jp-relatedposts' ).html( html );
if ( $( 'input[name="jetpack_relatedposts[show_date]"]:checked' ).length ) {
$( '.jp-relatedposts-post-title' ).each( function() {
$( this ).after( $( '<span>August 8, 2005</span>' ) );
} );
}
if ( $( 'input[name="jetpack_relatedposts[show_context]"]:checked' ).length ) {
$( '.jp-relatedposts-post-context' ).show();
} else {
$( '.jp-relatedposts-post-context' ).hide();
}
$( '#settings-reading-relatedposts-preview .jp-relatedposts' ).show();
};
// Update on load
update_preview();
update_ui();
// Update on change
$( '#settings-reading-relatedposts-customize input' )
.change( update_preview );
$( '#settings-reading-relatedposts' )
.find( 'input.tog' )
.change( update_ui );
});
</script>
EOT;
}
/**
* Gets an array of related posts that match the given post_id.
*
* @param int $post_id
* @param array $args - params to use when building Elasticsearch filters to narrow down the search domain.
* @uses self::get_options, get_post_type, wp_parse_args, apply_filters
* @return array
*/
public function get_for_post_id( $post_id, array $args ) {
$options = $this->get_options();
if ( ! empty( $args['size'] ) )
$options['size'] = $args['size'];
if ( ! $options['enabled'] || 0 == (int)$post_id || empty( $options['size'] ) )
return array();
$defaults = array(
'size' => (int)$options['size'],
'post_type' => get_post_type( $post_id ),
'post_formats' => array(),
'has_terms' => array(),
'date_range' => array(),
'exclude_post_ids' => array(),
);
$args = wp_parse_args( $args, $defaults );
/**
* Filter the arguments used to retrieve a list of Related Posts.
*
* @module related-posts
*
* @since 2.8.0
*
* @param array $args Array of options to retrieve Related Posts.
* @param string $post_id Post ID of the post for which we are retrieving Related Posts.
*/
$args = apply_filters( 'jetpack_relatedposts_filter_args', $args, $post_id );
$filters = $this->_get_es_filters_from_args( $post_id, $args );
/**
* Filter Elasticsearch options used to calculate Related Posts.
*
* @module related-posts
*
* @since 2.8.0
*
* @param array $filters Array of Elasticsearch filters based on the post_id and args.
* @param string $post_id Post ID of the post for which we are retrieving Related Posts.
*/
$filters = apply_filters( 'jetpack_relatedposts_filter_filters', $filters, $post_id );
$results = $this->_get_related_posts( $post_id, $args['size'], $filters );
/**
* Filter the array of related posts matched by Elasticsearch.
*
* @module related-posts
*
* @since 2.8.0
*
* @param array $results Array of related posts matched by Elasticsearch.
* @param string $post_id Post ID of the post for which we are retrieving Related Posts.
*/
return apply_filters( 'jetpack_relatedposts_returned_results', $results, $post_id );
}
/**
* =========================
* PRIVATE UTILITY FUNCTIONS
* =========================
*/
/**
* Creates an array of Elasticsearch filters based on the post_id and args.
*
* @param int $post_id
* @param array $args
* @uses apply_filters, get_post_types, get_post_format_strings
* @return array
*/
protected function _get_es_filters_from_args( $post_id, array $args ) {
$filters = array();
/**
* Filter the terms used to search for Related Posts.
*
* @module related-posts
*
* @since 2.8.0
*
* @param array $args['has_terms'] Array of terms associated to the Related Posts.
* @param string $post_id Post ID of the post for which we are retrieving Related Posts.
*/
$args['has_terms'] = apply_filters( 'jetpack_relatedposts_filter_has_terms', $args['has_terms'], $post_id );
if ( ! empty( $args['has_terms'] ) ) {
foreach( (array)$args['has_terms'] as $term ) {
if ( mb_strlen( $term->taxonomy ) ) {
switch ( $term->taxonomy ) {
case 'post_tag':
$tax_fld = 'tag.slug';
break;
case 'category':
$tax_fld = 'category.slug';
break;
default:
$tax_fld = 'taxonomy.' . $term->taxonomy . '.slug';
break;
}
$filters[] = array( 'term' => array( $tax_fld => $term->slug ) );
}
}
}
/**
* Filter the Post Types where we search Related Posts.
*
* @module related-posts
*
* @since 2.8.0
*
* @param array $args['post_type'] Array of Post Types.
* @param string $post_id Post ID of the post for which we are retrieving Related Posts.
*/
$args['post_type'] = apply_filters( 'jetpack_relatedposts_filter_post_type', $args['post_type'], $post_id );
$valid_post_types = get_post_types();
if ( is_array( $args['post_type'] ) ) {
$sanitized_post_types = array();
foreach ( $args['post_type'] as $pt ) {
if ( in_array( $pt, $valid_post_types ) )
$sanitized_post_types[] = $pt;
}
if ( ! empty( $sanitized_post_types ) )
$filters[] = array( 'terms' => array( 'post_type' => $sanitized_post_types ) );
} else if ( in_array( $args['post_type'], $valid_post_types ) && 'all' != $args['post_type'] ) {
$filters[] = array( 'term' => array( 'post_type' => $args['post_type'] ) );
}
/**
* Filter the Post Formats where we search Related Posts.
*
* @module related-posts
*
* @since 3.3.0
*
* @param array $args['post_formats'] Array of Post Formats.
* @param string $post_id Post ID of the post for which we are retrieving Related Posts.
*/
$args['post_formats'] = apply_filters( 'jetpack_relatedposts_filter_post_formats', $args['post_formats'], $post_id );
$valid_post_formats = get_post_format_strings();
$sanitized_post_formats = array();
foreach ( $args['post_formats'] as $pf ) {
if ( array_key_exists( $pf, $valid_post_formats ) ) {
$sanitized_post_formats[] = $pf;
}
}
if ( ! empty( $sanitized_post_formats ) ) {
$filters[] = array( 'terms' => array( 'post_format' => $sanitized_post_formats ) );
}
/**
* Filter the date range used to search Related Posts.
*
* @module related-posts
*
* @since 2.8.0
*
* @param array $args['date_range'] Array of a month interval where we search Related Posts.
* @param string $post_id Post ID of the post for which we are retrieving Related Posts.
*/
$args['date_range'] = apply_filters( 'jetpack_relatedposts_filter_date_range', $args['date_range'], $post_id );
if ( is_array( $args['date_range'] ) && ! empty( $args['date_range'] ) ) {
$args['date_range'] = array_map( 'intval', $args['date_range'] );
if ( !empty( $args['date_range']['from'] ) && !empty( $args['date_range']['to'] ) ) {
$filters[] = array(
'range' => array(
'date_gmt' => $this->_get_coalesced_range( $args['date_range'] ),
)
);
}
}
/**
* Filter the Post IDs excluded from appearing in Related Posts.
*
* @module related-posts
*
* @since 2.9.0
*
* @param array $args['exclude_post_ids'] Array of Post IDs.
* @param string $post_id Post ID of the post for which we are retrieving Related Posts.
*/
$args['exclude_post_ids'] = apply_filters( 'jetpack_relatedposts_filter_exclude_post_ids', $args['exclude_post_ids'], $post_id );
if ( !empty( $args['exclude_post_ids'] ) && is_array( $args['exclude_post_ids'] ) ) {
$excluded_post_ids = array();
foreach ( $args['exclude_post_ids'] as $exclude_post_id) {
$exclude_post_id = (int)$exclude_post_id;
if ( $exclude_post_id > 0 )
$excluded_post_ids[] = $exclude_post_id;
}
$filters[] = array( 'not' => array( 'terms' => array( 'post_id' => $excluded_post_ids ) ) );
}
return $filters;
}
/**
* Takes a range and coalesces it into a month interval bracketed by a time as determined by the blog_id to enhance caching.
*
* @param array $date_range
* @return array
*/
protected function _get_coalesced_range( array $date_range ) {
$now = time();
$coalesce_time = $this->_blog_id_wpcom % 86400;
$current_time = $now - strtotime( 'today', $now );
if ( $current_time < $coalesce_time && '01' == date( 'd', $now ) ) {
// Move back 1 period
return array(
'from' => date( 'Y-m-01', strtotime( '-1 month', $date_range['from'] ) ) . ' ' . date( 'H:i:s', $coalesce_time ),
'to' => date( 'Y-m-01', $date_range['to'] ) . ' ' . date( 'H:i:s', $coalesce_time ),
);
} else {
// Use current period
return array(
'from' => date( 'Y-m-01', $date_range['from'] ) . ' ' . date( 'H:i:s', $coalesce_time ),
'to' => date( 'Y-m-01', strtotime( '+1 month', $date_range['to'] ) ) . ' ' . date( 'H:i:s', $coalesce_time ),
);
}
}
/**
* Generate and output ajax response for related posts API call.
* NOTE: Calls exit() to end all further processing after payload has been outputed.
*
* @param array $excludes array of post_ids to exclude
* @uses send_nosniff_header, self::get_for_post_id, get_the_ID
* @return null
*/
protected function _action_frontend_init_ajax( array $excludes ) {
define( 'DOING_AJAX', true );
header( 'Content-type: application/json; charset=utf-8' ); // JSON can only be UTF-8
send_nosniff_header();
$options = $this->get_options();
if ( isset( $_GET['jetpackrpcustomize'] ) ) {
// If we're in the customizer, add dummy content.
$date_now = current_time( get_option( 'date_format' ) );
$related_posts = array(
array(
'id' => - 1,
'url' => 'https://jetpackme.files.wordpress.com/2014/08/1-wpios-ipad-3-1-viewsite.png?w=350&h=200&crop=1',
'url_meta' => array(
'origin' => 0,
'position' => 0
),
'title' => esc_html__( 'Big iPhone/iPad Update Now Available', 'jetpack' ),
'date' => $date_now,
'format' => false,
'excerpt' => esc_html__( 'It is that time of the year when devices are shiny again.', 'jetpack' ),
'rel' => 'nofollow',
'context' => esc_html__( 'In "Mobile"', 'jetpack' ),
'img' => array(
'src' => 'https://jetpackme.files.wordpress.com/2014/08/1-wpios-ipad-3-1-viewsite.png?w=350&h=200&crop=1',
'width' => 350,
'height' => 200
),
'classes' => array()
),
array(
'id' => - 1,
'url' => 'https://jetpackme.files.wordpress.com/2014/08/wordpress-com-news-wordpress-for-android-ui-update2.jpg?w=350&h=200&crop=1',
'url_meta' => array(
'origin' => 0,
'position' => 0
),
'title' => esc_html__( 'The WordPress for Android App Gets a Big Facelift', 'jetpack' ),
'date' => $date_now,
'format' => false,
'excerpt' => esc_html__( 'Writing is new again in Android with the new WordPress app.', 'jetpack' ),
'rel' => 'nofollow',
'context' => esc_html__( 'In "Mobile"', 'jetpack' ),
'img' => array(
'src' => 'https://jetpackme.files.wordpress.com/2014/08/wordpress-com-news-wordpress-for-android-ui-update2.jpg?w=350&h=200&crop=1',
'width' => 350,
'height' => 200
),
'classes' => array()
),
array(
'id' => - 1,
'url' => 'https://jetpackme.files.wordpress.com/2014/08/videopresswedding.jpg?w=350&h=200&crop=1',
'url_meta' => array(
'origin' => 0,
'position' => 0
),
'title' => esc_html__( 'Upgrade Focus, VideoPress for weddings', 'jetpack' ),
'date' => $date_now,
'format' => false,
'excerpt' => esc_html__( 'Weddings are in the spotlight now with VideoPress for weddings.', 'jetpack' ),
'rel' => 'nofollow',
'context' => esc_html__( 'In "Mobile"', 'jetpack' ),
'img' => array(
'src' => 'https://jetpackme.files.wordpress.com/2014/08/videopresswedding.jpg?w=350&h=200&crop=1',
'width' => 350,
'height' => 200
),
'classes' => array()
),
);
for ( $total = 0; $total < $options['size'] - 3; $total++ ) {
$related_posts[] = $related_posts[ $total ];
}
$current_post = get_post();
// Exclude current post after filtering to make sure it's excluded and not lost during filtering.
$excluded_posts = array_merge(
/** This filter is already documented in modules/related-posts/jetpack-related-posts.php */
apply_filters( 'jetpack_relatedposts_filter_exclude_post_ids', array() ),
array( $current_post->ID )
);
// Fetch posts with featured image.
$with_post_thumbnails = get_posts( array(
'posts_per_page' => $options['size'],
'post__not_in' => $excluded_posts,
'post_type' => $current_post->post_type,
'meta_key' => '_thumbnail_id',
'suppress_filters' => false,
) );
// If we don't have enough, fetch posts without featured image.
if ( 0 < ( $more = $options['size'] - count( $with_post_thumbnails ) ) ) {
$no_post_thumbnails = get_posts( array(
'posts_per_page' => $more,
'post__not_in' => $excluded_posts,
'post_type' => $current_post->post_type,
'meta_query' => array(
array(
'key' => '_thumbnail_id',
'compare' => 'NOT EXISTS',
),
),
'suppress_filters' => false,
) );
} else {
$no_post_thumbnails = array();
}
foreach ( array_merge( $with_post_thumbnails, $no_post_thumbnails ) as $index => $real_post ) {
$related_posts[ $index ]['id'] = $real_post->ID;
$related_posts[ $index ]['url'] = esc_url( get_permalink( $real_post ) );
$related_posts[ $index ]['title'] = $this->_to_utf8( $this->_get_title( $real_post->post_title, $real_post->post_content ) );
$related_posts[ $index ]['date'] = get_the_date( '', $real_post );
$related_posts[ $index ]['excerpt'] = html_entity_decode( $this->_to_utf8( $this->_get_excerpt( $real_post->post_excerpt, $real_post->post_content ) ), ENT_QUOTES, 'UTF-8' );
$related_posts[ $index ]['img'] = $this->_generate_related_post_image_params( $real_post->ID );
$related_posts[ $index ]['context'] = $this->_generate_related_post_context( $real_post->ID );
}
} else {
$related_posts = $this->get_for_post_id(
get_the_ID(),
array(
'exclude_post_ids' => $excludes,
)
);
}
$response = array(
'version' => self::VERSION,
'show_thumbnails' => (bool) $options['show_thumbnails'],
'show_date' => (bool) $options['show_date'],
'show_context' => (bool) $options['show_context'],
'layout' => (string) $options['layout'],
'headline' => (string) $options['headline'],
'items' => array(),
);
if ( count( $related_posts ) == $options['size'] )
$response['items'] = $related_posts;
echo json_encode( $response );
exit();
}
/**
* Returns a UTF-8 encoded array of post information for the given post_id
*
* @param int $post_id
* @param int $position
* @param int $origin The post id that this is related to
* @uses get_post, get_permalink, remove_query_arg, get_post_format, apply_filters
* @return array
*/
protected function _get_related_post_data_for_post( $post_id, $position, $origin ) {
$post = get_post( $post_id );
return array(
'id' => $post->ID,
'url' => get_permalink( $post->ID ),
'url_meta' => array( 'origin' => $origin, 'position' => $position ),
'title' => $this->_to_utf8( $this->_get_title( $post->post_title, $post->post_content ) ),
'date' => get_the_date( '', $post->ID ),
'format' => get_post_format( $post->ID ),
'excerpt' => html_entity_decode( $this->_to_utf8( $this->_get_excerpt( $post->post_excerpt, $post->post_content ) ), ENT_QUOTES, 'UTF-8' ),
/**
* Filters the rel attribute for the Related Posts' links.
*
* @module related-posts
*
* @since 3.7.0
*
* @param string nofollow Link rel attribute for Related Posts' link. Default is nofollow.
* @param int $post->ID Post ID.
*/
'rel' => apply_filters( 'jetpack_relatedposts_filter_post_link_rel', 'nofollow', $post->ID ),
/**
* Filter the context displayed below each Related Post.
*
* @module related-posts
*
* @since 3.0.0
*
* @param string $this->_to_utf8( $this->_generate_related_post_context( $post->ID ) ) Context displayed below each related post.
* @param string $post_id Post ID of the post for which we are retrieving Related Posts.
*/
'context' => apply_filters(
'jetpack_relatedposts_filter_post_context',
$this->_to_utf8( $this->_generate_related_post_context( $post->ID ) ),
$post->ID
),
'img' => $this->_generate_related_post_image_params( $post->ID ),
/**
* Filter the post css classes added on HTML markup.
*
* @module related-posts
*
* @since 3.8.0
*
* @param array array() CSS classes added on post HTML markup.
* @param string $post_id Post ID.
*/
'classes' => apply_filters(
'jetpack_relatedposts_filter_post_css_classes',
array(),
$post->ID
),
);
}
/**
* Returns either the title or a small excerpt to use as title for post.
*
* @param string $post_title
* @param string $post_content
* @uses strip_shortcodes, wp_trim_words, __
* @return string
*/
protected function _get_title( $post_title, $post_content ) {
if ( ! empty( $post_title ) ) {
return wp_strip_all_tags( $post_title );
}
$post_title = wp_trim_words( wp_strip_all_tags( strip_shortcodes( $post_content ) ), 5, '' );
if ( ! empty( $post_title ) ) {
return $post_title;
}
return __( 'Untitled Post', 'jetpack' );
}
/**
* Returns a plain text post excerpt for title attribute of links.
*
* @param string $post_excerpt
* @param string $post_content
* @uses strip_shortcodes, wp_strip_all_tags, wp_trim_words
* @return string
*/
protected function _get_excerpt( $post_excerpt, $post_content ) {
if ( empty( $post_excerpt ) )
$excerpt = $post_content;
else
$excerpt = $post_excerpt;
return wp_trim_words( wp_strip_all_tags( strip_shortcodes( $excerpt ) ), 50, '' );
}
/**
* Generates the thumbnail image to be used for the post. Uses the
* image as returned by Jetpack_PostImages::get_image()
*
* @param int $post_id
* @uses self::get_options, apply_filters, Jetpack_PostImages::get_image, Jetpack_PostImages::fit_image_url
* @return string
*/
protected function _generate_related_post_image_params( $post_id ) {
$options = $this->get_options();
$image_params = array(
'src' => '',
'width' => 0,
'height' => 0,
);
if ( ! $options['show_thumbnails'] ) {
return $image_params;
}
/**
* Filter the size of the Related Posts images.
*
* @module related-posts
*
* @since 2.8.0
*
* @param array array( 'width' => 350, 'height' => 200 ) Size of the images displayed below each Related Post.
*/
$thumbnail_size = apply_filters(
'jetpack_relatedposts_filter_thumbnail_size',
array( 'width' => 350, 'height' => 200 )
);
if ( !is_array( $thumbnail_size ) ) {
$thumbnail_size = array(
'width' => (int)$thumbnail_size,
'height' => (int)$thumbnail_size
);
}
// Try to get post image
if ( class_exists( 'Jetpack_PostImages' ) ) {
$img_url = '';
$post_image = Jetpack_PostImages::get_image(
$post_id,
$thumbnail_size
);
if ( is_array($post_image) ) {
$img_url = $post_image['src'];
} elseif ( class_exists( 'Jetpack_Media_Summary' ) ) {
$media = Jetpack_Media_Summary::get( $post_id );
if ( is_array($media) && !empty( $media['image'] ) ) {
$img_url = $media['image'];
}
}
if ( !empty( $img_url ) ) {
$image_params['width'] = $thumbnail_size['width'];
$image_params['height'] = $thumbnail_size['height'];
$image_params['src'] = Jetpack_PostImages::fit_image_url(
$img_url,
$thumbnail_size['width'],
$thumbnail_size['height']
);
}
}
return $image_params;
}
/**
* Returns the string UTF-8 encoded
*
* @param string $text
* @return string
*/
protected function _to_utf8( $text ) {
if ( $this->_convert_charset ) {
return iconv( $this->_blog_charset, 'UTF-8', $text );
} else {
return $text;
}
}
/**
* =============================================
* PROTECTED UTILITY FUNCTIONS EXTENDED BY WPCOM
* =============================================
*/
/**
* Workhorse method to return array of related posts matched by Elasticsearch.
*
* @param int $post_id
* @param int $size
* @param array $filters
* @uses wp_remote_post, is_wp_error, get_option, wp_remote_retrieve_body, get_post, add_query_arg, remove_query_arg, get_permalink, get_post_format, apply_filters
* @return array
*/
protected function _get_related_posts( $post_id, $size, array $filters ) {
$hits = $this->_filter_non_public_posts(
$this->_get_related_post_ids(
$post_id,
$size,
$filters
)
);
/**
* Filter the Related Posts matched by Elasticsearch.
*
* @module related-posts
*
* @since 2.9.0
*
* @param array $hits Array of Post IDs matched by Elasticsearch.
* @param string $post_id Post ID of the post for which we are retrieving Related Posts.
*/
$hits = apply_filters( 'jetpack_relatedposts_filter_hits', $hits, $post_id );
$related_posts = array();
foreach ( $hits as $i => $hit ) {
$related_posts[] = $this->_get_related_post_data_for_post( $hit['id'], $i, $post_id );
}
return $related_posts;
}
/**
* Get array of related posts matched by Elasticsearch.
*
* @param int $post_id
* @param int $size
* @param array $filters
* @uses wp_remote_post, is_wp_error, wp_remote_retrieve_body, get_post_meta, update_post_meta
* @return array
*/
protected function _get_related_post_ids( $post_id, $size, array $filters ) {
$now_ts = time();
$cache_meta_key = '_jetpack_related_posts_cache';
$body = array(
'size' => (int) $size,
);
if ( !empty( $filters ) )
$body['filter'] = array( 'and' => $filters );
// Build cache key
$cache_key = md5( serialize( $body ) );
// Load all cached values
if ( wp_using_ext_object_cache() ) {
$transient_name = "{$cache_meta_key}_{$cache_key}_{$post_id}";
$cache = get_transient( $transient_name );
if ( false !== $cache ) {
return $cache;
}
} else {
$cache = get_post_meta( $post_id, $cache_meta_key, true );
if ( empty( $cache ) )
$cache = array();
// Cache is valid! Return cached value.
if ( isset( $cache[ $cache_key ] ) && is_array( $cache[ $cache_key ] ) && $cache[ $cache_key ][ 'expires' ] > $now_ts ) {
return $cache[ $cache_key ][ 'payload' ];
}
}
$response = wp_remote_post(
"https://public-api.wordpress.com/rest/v1/sites/{$this->_blog_id_wpcom}/posts/$post_id/related/",
array(
'timeout' => 10,
'user-agent' => 'jetpack_related_posts',
'sslverify' => true,
'body' => $body,
)
);
// Oh no... return nothing don't cache errors.
if ( is_wp_error( $response ) ) {
if ( isset( $cache[ $cache_key ] ) && is_array( $cache[ $cache_key ] ) )
return $cache[ $cache_key ][ 'payload' ]; // return stale
else
return array();
}
$results = json_decode( wp_remote_retrieve_body( $response ), true );
$related_posts = array();
if ( is_array( $results ) && !empty( $results['hits'] ) ) {
foreach( $results['hits'] as $hit ) {
$related_posts[] = array(
'id' => $hit['fields']['post_id'],
);
}
}
// An empty array might indicate no related posts or that posts
// are not yet synced to WordPress.com, so we cache for only 1
// minute in this case
if ( empty( $related_posts ) ) {
$cache_ttl = 60;
} else {
$cache_ttl = 12 * HOUR_IN_SECONDS;
}
// Update cache
if ( wp_using_ext_object_cache() ) {
set_transient( $transient_name, $related_posts, $cache_ttl );
} else {
// Copy all valid cache values
$new_cache = array();
foreach ( $cache as $k => $v ) {
if ( is_array( $v ) && $v[ 'expires' ] > $now_ts ) {
$new_cache[ $k ] = $v;
}
}
// Set new cache value
$cache_expires = $cache_ttl + $now_ts;
$new_cache[ $cache_key ] = array(
'expires' => $cache_expires,
'payload' => $related_posts,
);
update_post_meta( $post_id, $cache_meta_key, $new_cache );
}
return $related_posts;
}
/**
* Filter out any hits that are not public anymore.
*
* @param array $related_posts
* @uses get_post_stati, get_post_status
* @return array
*/
protected function _filter_non_public_posts( array $related_posts ) {
$public_stati = get_post_stati( array( 'public' => true ) );
$filtered = array();
foreach ( $related_posts as $hit ) {
if ( in_array( get_post_status( $hit['id'] ), $public_stati ) ) {
$filtered[] = $hit;
}
}
return $filtered;
}
/**
* Generates a context for the related content (second line in related post output).
* Order of importance:
* - First category (Not 'Uncategorized')
* - First post tag
* - Number of comments
*
* @param int $post_id
* @uses get_the_category, get_the_terms, get_comments_number, number_format_i18n, __, _n
* @return string
*/
protected function _generate_related_post_context( $post_id ) {
$categories = get_the_category( $post_id );
if ( is_array( $categories ) ) {
foreach ( $categories as $category ) {
if ( 'uncategorized' != $category->slug && '' != trim( $category->name ) ) {
$post_cat_context = sprintf(
_x( 'In "%s"', 'in {category/tag name}', 'jetpack' ),
$category->name
);
/**
* Filter the "In Category" line displayed in the post context below each Related Post.
*
* @module related-posts
*
* @since 3.2.0
*
* @param string $post_cat_context "In Category" line displayed in the post context below each Related Post.
* @param array $category Array containing information about the category.
*/
return apply_filters( 'jetpack_relatedposts_post_category_context', $post_cat_context, $category );
}
}
}
$tags = get_the_terms( $post_id, 'post_tag' );
if ( is_array( $tags ) ) {
foreach ( $tags as $tag ) {
if ( '' != trim( $tag->name ) ) {
$post_tag_context = sprintf(
_x( 'In "%s"', 'in {category/tag name}', 'jetpack' ),
$tag->name
);
/**
* Filter the "In Tag" line displayed in the post context below each Related Post.
*
* @module related-posts
*
* @since 3.2.0
*
* @param string $post_tag_context "In Tag" line displayed in the post context below each Related Post.
* @param array $tag Array containing information about the tag.
*/
return apply_filters( 'jetpack_relatedposts_post_tag_context', $post_tag_context, $tag );
}
}
}
$comment_count = get_comments_number( $post_id );
if ( $comment_count > 0 ) {
return sprintf(
_n( 'With 1 comment', 'With %s comments', $comment_count, 'jetpack' ),
number_format_i18n( $comment_count )
);
}
return __( 'Similar post', 'jetpack' );
}
/**
* Logs clicks for clickthrough analysis and related result tuning.
*
* @return null
*/
protected function _log_click( $post_id, $to_post_id, $link_position ) {
}
/**
* Determines if the current post is able to use related posts.
*
* @uses self::get_options, is_admin, is_single, apply_filters
* @return bool
*/
protected function _enabled_for_request() {
$enabled = is_single()
&&
! is_admin()
&&
( !$this->_allow_feature_toggle() || $this->get_option( 'enabled' ) );
/**
* Filter the Enabled value to allow related posts to be shown on pages as well.
*
* @module related-posts
*
* @since 3.3.0
*
* @param bool $enabled Should Related Posts be enabled on the current page.
*/
return apply_filters( 'jetpack_relatedposts_filter_enabled_for_request', $enabled );
}
/**
* Adds filters and enqueues assets.
*
* @uses self::_enqueue_assets, self::_setup_shortcode, add_filter
* @return null
*/
protected function _action_frontend_init_page() {
$this->_enqueue_assets( true, true );
$this->_setup_shortcode();
add_filter( 'the_content', array( $this, 'filter_add_target_to_dom' ), 40 );
}
/**
* Enqueues assets needed to do async loading of related posts.
*
* @uses wp_enqueue_script, wp_enqueue_style, plugins_url
* @return null
*/
protected function _enqueue_assets( $script, $style ) {
$dependencies = is_customize_preview() ? array( 'customize-base' ) : array( 'jquery' );
if ( $script ) {
wp_enqueue_script(
'jetpack_related-posts',
Jetpack::get_file_url_for_environment(
'_inc/build/related-posts/related-posts.min.js',
'modules/related-posts/related-posts.js'
),
$dependencies,
self::VERSION
);
$related_posts_js_options = array(
/**
* Filter each Related Post Heading structure.
*
* @since 4.0.0
*
* @param string $str Related Post Heading structure. Default to h4.
*/
'post_heading' => apply_filters( 'jetpack_relatedposts_filter_post_heading', esc_attr( 'h4' ) ),
);
wp_localize_script( 'jetpack_related-posts', 'related_posts_js_options', $related_posts_js_options );
}
if ( $style ){
wp_enqueue_style( 'jetpack_related-posts', plugins_url( 'related-posts.css', __FILE__ ), array(), self::VERSION );
wp_style_add_data( 'jetpack_related-posts', 'rtl', 'replace' );
}
}
/**
* Sets up the shortcode processing.
*
* @uses add_filter, add_shortcode
* @return null
*/
protected function _setup_shortcode() {
add_filter( 'the_content', array( $this, 'test_for_shortcode' ), 0 );
add_shortcode( self::SHORTCODE, array( $this, 'get_target_html' ) );
}
protected function _allow_feature_toggle() {
if ( null === $this->_allow_feature_toggle ) {
/**
* Filter the display of the Related Posts toggle in Settings > Reading.
*
* @module related-posts
*
* @since 2.8.0
*
* @param bool false Display a feature toggle. Default to false.
*/
$this->_allow_feature_toggle = apply_filters( 'jetpack_relatedposts_filter_allow_feature_toggle', false );
}
return $this->_allow_feature_toggle;
}
/**
* ===================================================
* FUNCTIONS EXPOSING RELATED POSTS IN THE WP REST API
* ===================================================
*/
/**
* Add Related Posts to the REST API Post response.
*
* @since 4.4.0
*
* @action rest_api_init
* @uses register_rest_field, self::rest_get_related_posts
* @return null
*/
public function rest_register_related_posts() {
register_rest_field( 'post',
'jetpack-related-posts',
array(
'get_callback' => array( $this, 'rest_get_related_posts' ),
'update_callback' => null,
'schema' => null,
)
);
}
/**
* Build an array of Related Posts.
*
* @since 4.4.0
*
* @param array $object Details of current post.
* @param string $field_name Name of field.
* @param WP_REST_Request $request Current request
*
* @uses self::get_for_post_id
*
* @return array
*/
public function rest_get_related_posts( $object, $field_name, $request ) {
return $this->get_for_post_id( $object['id'], array() );
}
}
class Jetpack_RelatedPosts_Raw extends Jetpack_RelatedPosts {
protected $_query_name;
/**
* Allows callers of this class to tag each query with a unique name for tracking purposes.
*
* @param string $name
* @return Jetpack_RelatedPosts_Raw
*/
public function set_query_name( $name ) {
$this->_query_name = (string) $name;
return $this;
}
/**
* The raw related posts class can be used by other plugins or themes
* to get related content. This class wraps the existing RelatedPosts
* logic thus we never want to add anything to the DOM or do anything
* for event hooks. We will also not present any settings for this
* class and keep it enabled as calls to this class is done
* programmatically.
*/
public function action_admin_init() {}
public function action_frontend_init() {}
public function get_options() {
return array(
'enabled' => true,
);
}
/**
* Workhorse method to return array of related posts ids matched by Elasticsearch.
*
* @param int $post_id
* @param int $size
* @param array $filters
* @uses wp_remote_post, is_wp_error, wp_remote_retrieve_body
* @return array
*/
protected function _get_related_posts( $post_id, $size, array $filters ) {
$hits = $this->_filter_non_public_posts(
$this->_get_related_post_ids(
$post_id,
$size,
$filters
)
);
/** This filter is already documented in modules/related-posts/related-posts.php */
$hits = apply_filters( 'jetpack_relatedposts_filter_hits', $hits, $post_id );
return $hits;
}
}