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jetpack-related-posts.php
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jetpack-related-posts.php
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<?php
use Automattic\Jetpack\Assets;
use Automattic\Jetpack\Sync\Settings;
class Jetpack_RelatedPosts {
const VERSION = '20190204';
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();
}
}
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();
}
}
return self::$instance_raw;
}
protected $_options;
protected $_allow_feature_toggle;
protected $_blog_charset;
protected $_convert_charset;
protected $_previous_post_id;
protected $_found_shortcode = false;
/**
* Constructor for Jetpack_RelatedPosts.
*
* @uses get_option, add_action, apply_filters
*
* @return null
*/
public function __construct() {
$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.
add_action( 'rest_api_init', array( $this, 'rest_register_related_posts' ) );
jetpack_register_block(
'jetpack/related-posts',
array(
'render_callback' => array( $this, 'render_block' ),
)
);
}
protected function get_blog_id() {
return Jetpack_Options::get_option( 'id' );
}
/**
* =================
* 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_client_rendered_html_unsupported' ) );
if ( ! $this->_enabled_for_request() )
return;
if ( isset( $_GET['relatedposts'] ) ) {
$excludes = $this->parse_numeric_get_arg( 'relatedposts_exclude' );
$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.
* Will skip adding the target if the post content contains a Related Posts block.
*
* @filter the_content
*
* @param string $content Post content.
*
* @returns string
*/
public function filter_add_target_to_dom( $content ) {
if ( has_block( 'jetpack/related-posts', $content ) ) {
return $content;
}
if ( ! $this->_found_shortcode ) {
if ( class_exists( 'Jetpack_AMP_Support' ) && Jetpack_AMP_Support::is_amp_request() ) {
$content .= "\n" . $this->get_server_rendered_html();
} else {
$content .= "\n" . $this->get_client_rendered_html();
}
}
return $content;
}
/**
* Render static markup based on the Gutenberg block code
*
* @return string Rendered related posts HTML.
*/
public function get_server_rendered_html() {
$rp_settings = Jetpack_Options::get_option( 'relatedposts', array() );
$block_rp_settings = array(
'displayThumbnails' => $rp_settings['show_thumbnails'],
'showHeadline' => $rp_settings['show_headline'],
'displayDate' => isset( $rp_settings['show_date'] ) ? (bool) $rp_settings['show_date'] : true,
'displayContext' => isset( $rp_settings['show_context'] ) && $rp_settings['show_context'],
'postLayout' => isset( $rp_settings['layout'] ) ? $rp_settings['layout'] : 'grid',
'postsToShow' => isset( $rp_settings['size'] ) ? $rp_settings['size'] : 3,
/** This filter is already documented in modules/related-posts/jetpack-related-posts.php */
'headline' => apply_filters( 'jetpack_relatedposts_filter_headline', $this->get_headline() ),
);
return $this->render_block( $block_rp_settings );
}
/**
* 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_client_rendered_html() {
if ( 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_client_rendered_html_unsupported() {
if ( Settings::is_syncing() ) {
return '';
}
return "\n\n<!-- Jetpack Related Posts is not supported in this context. -->\n\n";
}
/**
* ===============
* GUTENBERG BLOCK
* ===============
*/
/**
* Echoes out items for the Gutenberg block
*
* @param array $related_post The post oject.
* @param array $block_attributes The block attributes.
*/
public function render_block_item( $related_post, $block_attributes ) {
$instance_id = 'related-posts-item-' . uniqid();
$label_id = $instance_id . '-label';
$item_markup = sprintf(
'<ul id="%1$s" aria-labelledby="%2$s" class="jp-related-posts-i2__post" role="menuitem">',
esc_attr( $instance_id ),
esc_attr( $label_id )
);
$item_markup .= sprintf(
'<li class="jp-related-posts-i2__post-link"><a id="%1$s" href="%2$s" rel="%4$s">%3$s</a></li>',
esc_attr( $label_id ),
esc_url( $related_post['url'] ),
esc_attr( $related_post['title'] ),
esc_attr( $related_post['rel'] )
);
if ( ! empty( $block_attributes['show_thumbnails'] ) && ! empty( $related_post['img']['src'] ) ) {
$img_link = sprintf(
'<li class="jp-related-posts-i2__post-img-link"><a href="%1$s" rel="%2$s"><img src="%3$s" width="%4$s" alt="%5$s" /></a></li>',
esc_url( $related_post['url'] ),
esc_attr( $related_post['rel'] ),
esc_url( $related_post['img']['src'] ),
esc_attr( $related_post['img']['width'] ),
esc_attr( $related_post['img']['alt_text'] )
);
$item_markup .= $img_link;
}
if ( $block_attributes['show_date'] ) {
$date_tag = sprintf(
'<li class="jp-related-posts-i2__post-date">%1$s</li>',
esc_html( $related_post['date'] )
);
$item_markup .= $date_tag;
}
if ( ( $block_attributes['show_context'] ) && ! empty( $related_post['context'] ) ) {
$context_tag = sprintf(
'<li class="jp-related-posts-i2__post-context">%1$s</li>',
esc_html( $related_post['context'] )
);
$item_markup .= $context_tag;
}
$item_markup .= '</ul>';
return $item_markup;
}
/**
* Render a related posts row.
*
* @param array $posts The posts to render into the row.
* @param array $block_attributes Block attributes.
*/
public function render_block_row( $posts, $block_attributes ) {
$rows_markup = '';
foreach ( $posts as $post ) {
$rows_markup .= $this->render_block_item( $post, $block_attributes );
}
return sprintf(
'<div class="jp-related-posts-i2__row" data-post-count="%1$s">%2$s</div>',
count( $posts ),
$rows_markup
);
}
/**
* Render the related posts markup.
*
* @param array $attributes Block attributes.
* @return string
*/
public function render_block( $attributes ) {
$block_attributes = array(
'headline' => isset( $attributes['headline'] ) ? $attributes['headline'] : null,
'show_thumbnails' => isset( $attributes['displayThumbnails'] ) && $attributes['displayThumbnails'],
'show_date' => isset( $attributes['displayDate'] ) ? (bool) $attributes['displayDate'] : true,
'show_context' => isset( $attributes['displayContext'] ) && $attributes['displayContext'],
'layout' => isset( $attributes['postLayout'] ) && 'list' === $attributes['postLayout'] ? $attributes['postLayout'] : 'grid',
'size' => ! empty( $attributes['postsToShow'] ) ? absint( $attributes['postsToShow'] ) : 3,
);
$excludes = $this->parse_numeric_get_arg( 'relatedposts_origin' );
$target_to_dom_priority = has_filter(
'the_content',
array( $this, 'filter_add_target_to_dom' )
);
remove_filter(
'the_content',
array( $this, 'filter_add_target_to_dom' ),
$target_to_dom_priority
);
$related_posts = $this->get_for_post_id(
get_the_ID(),
array(
'size' => $block_attributes['size'],
'exclude_post_ids' => $excludes,
)
);
$display_lower_row = $block_attributes['size'] > 3;
if ( empty( $related_posts ) ) {
return '';
}
switch ( count( $related_posts ) ) {
case 2:
case 4:
case 5:
$top_row_end = 2;
break;
default:
$top_row_end = 3;
break;
}
$upper_row_posts = array_slice( $related_posts, 0, $top_row_end );
$lower_row_posts = array_slice( $related_posts, $top_row_end );
$rows_markup = $this->render_block_row( $upper_row_posts, $block_attributes );
if ( $display_lower_row ) {
$rows_markup .= $this->render_block_row( $lower_row_posts, $block_attributes );
}
/*
* Below is a hack to get the block content to render correctly.
*
* This functionality should be covered in /inc/blocks.php but due to an error,
* this has not been fixed as of this writing.
*
* Alda has submitted a patch to Core in order to have this issue fixed at
* https://core.trac.wordpress.org/ticket/45495 and
* made it into WordPress 5.2.
*
* @todo update when WP 5.2 is the minimum support version.
*/
$priority = has_filter( 'the_content', 'wpautop' );
remove_filter( 'the_content', 'wpautop', $priority );
add_filter( 'the_content', '_restore_wpautop_hook', $priority + 1 );
return sprintf(
'<nav class="jp-relatedposts-i2" data-layout="%1$s">%2$s%3$s</nav>',
esc_attr( $block_attributes['layout'] ),
$block_attributes['headline'],
$rows_markup
);
}
/**
* ========================
* PUBLIC UTILITY FUNCTIONS
* ========================
*/
/**
* Parse a numeric GET variable to an array of values.
*
* @since 6.9.0
*
* @uses absint
*
* @param string $arg Name of the GET variable
* @return array $result Parsed value(s)
*/
public function parse_numeric_get_arg( $arg ) {
$result = array();
if ( isset( $_GET[ $arg ] ) ) {
if ( is_string( $_GET[ $arg ] ) ) {
$result = explode( ',', $_GET[ $arg ] );
} elseif ( is_array( $_GET[ $arg ] ) ) {
$result = array_values( $_GET[ $arg ] );
}
$result = array_unique( array_filter( array_map( 'absint', $result ) ) );
}
return $result;
}
/**
* 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
<p class="description">%s</p>
<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,
esc_html__( 'The following settings will impact all related posts on your site, except for those you created via the block editor:', 'jetpack' ),
checked( $options['show_headline'], true, false ),
esc_html__( 'Highlight related content with a heading', 'jetpack' ),
checked( $options['show_thumbnails'], true, false ),
esc_html__( 'Show a thumbnail image where available', '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/2019/03/cat-blog.png" 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/2019/03/devices.jpg" 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/2019/03/mobile-wedding.jpg" 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 Post which we want to find related posts for.
* @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 );