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transporter.php
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transporter.php
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<?php
/*
Plugin Name: Transporter
Plugin URI: https://github.com/tomharrigan/transporter
Description: Adds infinite scrolling support to the front-end blog post view and for the single post pages for themes, pulling the next post or set of posts automatically into view when the reader approaches the bottom of the page.
Version: 1.3
Author: TomHarrigan
Author URI: http://thomasharrigan.com
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
*/
/**
* Class: McNinja_Post_Transporter relies on add_theme_support, expects specific
* styling from each theme; including fixed footer.
*/
class McNinja_Post_Transporter {
/**
* Register actions and filters, plus parse IS settings
*
* @uses add_action, add_filter, self::get_settings
* @return null
*/
function __construct() {
add_action( 'pre_get_posts', array( $this, 'posts_per_page_query' ) );
add_action( 'admin_init', array( $this, 'settings_api_init' ) );
add_action( 'template_redirect', array( $this, 'action_template_redirect' ) );
add_action( 'template_redirect', array( $this, 'ajax_response' ) );
add_action( 'custom_ajax_infinite_transporter', array( $this, 'query' ) );
add_filter( 'infinite_transporter_query_args', array( $this, 'inject_query_args' ) );
add_filter( 'infinite_transporter_allowed_vars', array( $this, 'allowed_query_vars' ) );
add_action( 'the_post', array( $this, 'preserve_more_tag' ) );
add_action( 'wp_footer', array( $this, 'footer' ) );
// Plugin compatibility
add_filter( 'grunion_contact_form_redirect_url', array( $this, 'filter_grunion_redirect_url' ) );
// Parse IS settings from theme
self::get_settings();
}
/**
* Initialize our static variables
*/
static $the_time = null;
static $settings = null; // Don't access directly, instead use self::get_settings().
static $option_name_enabled = 'infinite_transporter';
/**
* Parse IS settings provided by theme
*
* @uses get_theme_support, infinite_transporter_has_footer_widgets, sanitize_title, add_action, get_option, wp_parse_args, is_active_sidebar
* @return object
*/
static function get_settings() {
if ( is_null( self::$settings ) ) {
$css_pattern = '#[^A-Z\d\-_]#i';
$settings = $defaults = array(
'type' => 'scroll', // scroll | click
'requested_type' => 'scroll', // store the original type for use when logic overrides it
'footer_widgets' => false, // true | false | sidebar_id | array of sidebar_ids -- last two are checked with is_active_sidebar
'container' => 'content', // container html id
'wrapper' => true, // true | false | html class
'render' => false, // optional function, otherwise the `content` template part will be used
'footer' => true, // boolean to enable or disable the infinite footer | string to provide an html id to derive footer width from
'google_analytics'=> false, // boolean if using google analytics, set to true
'post_order' => false, //
'footer_callback' => false, // function to be called to render the IS footer, in place of the default
'posts_per_page' => false, // int | false to set based on IS type
'click_handle' => true, // boolean to enable or disable rendering the click handler div. If type is click and this is false, page must include its own trigger with the HTML ID `infinite-handle`.
);
// Validate settings passed through add_theme_support()
$_settings = get_theme_support( 'infinite-transporter' );
if ( is_array( $_settings ) ) {
// Preferred implementation, where theme provides an array of options
if ( isset( $_settings[0] ) && is_array( $_settings[0] ) ) {
foreach ( $_settings[0] as $key => $value ) {
switch ( $key ) {
case 'type' :
if ( in_array( $value, array( 'scroll', 'click' ) ) )
$settings[ $key ] = $settings['requested_type'] = $value;
break;
case 'footer_widgets' :
if ( is_string( $value ) )
$settings[ $key ] = sanitize_title( $value );
elseif ( is_array( $value ) )
$settings[ $key ] = array_map( 'sanitize_title', $value );
elseif ( is_bool( $value ) )
$settings[ $key ] = $value;
break;
case 'container' :
case 'wrapper' :
if ( 'wrapper' == $key && is_bool( $value ) ) {
$settings[ $key ] = $value;
} else {
$value = preg_replace( $css_pattern, '', $value );
if ( ! empty( $value ) )
$settings[ $key ] = $value;
}
break;
case 'google_analytics' :
if ( is_bool( $value ) ) {
$settings[ $key ] = $value;
}
break;
case 'post_order' :
if ( is_bool( $value ) ) {
$settings[ $key ] = $value;
}
break;
case 'render' :
if ( false !== $value && is_callable( $value ) ) {
$settings[ $key ] = $value;
add_action( 'infinite_transporter_render', $value );
}
break;
case 'footer' :
if ( is_bool( $value ) ) {
$settings[ $key ] = $value;
} elseif ( is_string( $value ) ) {
$value = preg_replace( $css_pattern, '', $value );
if ( ! empty( $value ) )
$settings[ $key ] = $value;
}
break;
case 'footer_callback' :
if ( is_callable( $value ) )
$settings[ $key ] = $value;
else
$settings[ $key ] = false;
break;
case 'posts_per_page' :
if ( is_numeric( $value ) )
$settings[ $key ] = (int) $value;
break;
case 'click_handle' :
if ( is_bool( $value ) ) {
$settings[ $key ] = $value;
}
break;
default:
continue;
break;
}
}
} elseif ( is_string( $_settings[0] ) ) {
// Checks below are for backwards compatibility
// Container to append new posts to
$settings['container'] = preg_replace( $css_pattern, '', $_settings[0] );
// Wrap IS elements?
if ( isset( $_settings[1] ) )
$settings['wrapper'] = (bool) $_settings[1];
}
}
// Always ensure all values are present in the final array
$settings = wp_parse_args( $settings, $defaults );
// Check if a legacy `infinite_transporter_has_footer_widgets()` function is defined and override the footer_widgets parameter's value.
// Otherwise, if a widget area ID or array of IDs was provided in the footer_widgets parameter, check if any contains any widgets.
// It is safe to use `is_active_sidebar()` before the sidebar is registered as this function doesn't check for a sidebar's existence when determining if it contains any widgets.
if ( function_exists( 'infinite_transporter_has_footer_widgets' ) ) {
$settings['footer_widgets'] = (bool) infinite_transporter_has_footer_widgets();
} elseif ( is_array( $settings['footer_widgets'] ) ) {
$sidebar_ids = $settings['footer_widgets'];
$settings['footer_widgets'] = false;
foreach ( $sidebar_ids as $sidebar_id ) {
if ( is_active_sidebar( $sidebar_id ) ) {
$settings['footer_widgets'] = true;
break;
}
}
unset( $sidebar_ids );
unset( $sidebar_id );
} elseif ( is_string( $settings['footer_widgets'] ) ) {
$settings['footer_widgets'] = (bool) is_active_sidebar( $settings['footer_widgets'] );
}
// For complex logic, let themes filter the `footer_widgets` parameter.
$settings['footer_widgets'] = apply_filters( 'infinite_transporter_has_footer_widgets', $settings['footer_widgets'] );
// Finally, after all of the sidebar checks and filtering, ensure that a boolean value is present, otherwise set to default of `false`.
if ( ! is_bool( $settings['footer_widgets'] ) )
$settings['footer_widgets'] = false;
// Ensure that IS is enabled and no footer widgets exist if the IS type isn't already "click".
if ( 'click' != $settings['type'] ) {
// Check the setting status
$disabled = '' === get_option( self::$option_name_enabled ) ? true : false;
// Footer content or Reading option check
if ( $settings['footer_widgets'] || $disabled )
$settings['type'] = 'click';
}
// Ignore posts_per_page theme setting for [click] type
if ( 'click' == $settings['type'] )
$settings['posts_per_page'] = (int) get_option( 'posts_per_page' );
// Backwards compatibility for posts_per_page setting
elseif ( false === $settings['posts_per_page'] )
$settings['posts_per_page'] = 7;
// Force display of the click handler and attendant bits when the type isn't `click`
if ( 'click' !== $settings['type'] ) {
$settings['click_handle'] = true;
}
// Store final settings in a class static to avoid reparsing
self::$settings = apply_filters( 'infinite_transporter_settings', $settings );
}
return (object) self::$settings;
}
/**
* Retrieve the query used with Infinite Scroll
*
* @global $wp_the_query
* @uses apply_filters
* @return object
*/
static function wp_query() {
global $wp_the_query;
return apply_filters( 'infinite_transporter_query_object', $wp_the_query );
}
/**
* Has infinite scroll been triggered?
*/
static function got_infinity() {
return isset( $_GET[ 'infinity' ] );
}
/**
* Is this guaranteed to be the last batch of posts?
*/
static function is_last_batch() {
return (bool) ( count( self::wp_query()->posts ) < self::get_settings()->posts_per_page );
}
/**
* The more tag will be ignored by default if the blog page isn't our homepage.
* Let's force the $more global to false.
*/
function preserve_more_tag( $array ) {
global $more;
if ( self::got_infinity() )
$more = 0; //0 = show content up to the more tag. Add more link.
return $array;
}
/**
* Add a checkbox field to Settings > Reading
* for enabling infinite scroll.
*
* Only show if the current theme supports infinity.
*
* @uses current_theme_supports, add_settings_field, __, register_setting
* @action admin_init
* @return null
*/
function settings_api_init() {
if ( ! current_theme_supports( 'infinite-transporter' ) )
return;
// Add the setting field [infinite_transporter] and place it in Settings > Reading
add_settings_field( self::$option_name_enabled, '<span id="infinite-transporter-options">' . __( 'To infinity and beyond', 'jetpack' ) . '</span>', array( $this, 'infinite_setting_html' ), 'reading' );
register_setting( 'reading', self::$option_name_enabled, 'esc_attr' );
}
/**
* HTML code to display a checkbox true/false option
* for the infinite_transporter setting.
*/
function infinite_setting_html() {
$notice = '<em>' . __( 'We’ve changed this option to a click-to-scroll version for you since you have footer widgets in Appearance → Widgets, or your theme uses click-to-scroll as the default behavior.', 'jetpack' ) . '</em>';
// If the blog has footer widgets, show a notice instead of the checkbox
if ( self::get_settings()->footer_widgets || 'click' == self::get_settings()->requested_type ) {
echo '<label>' . $notice . '</label>';
} else {
echo '<label><input name="infinite_transporter" type="checkbox" value="1" ' . checked( 1, '' !== get_option( self::$option_name_enabled ), false ) . ' /> ' . __( 'Scroll Infinitely', 'jetpack' ) . '</br><small>' . sprintf( __( '(Shows %s posts on each load)', 'jetpack' ), number_format_i18n( self::get_settings()->posts_per_page ) ) . '</small>' . '</label>';
}
}
/**
* Does the legwork to determine whether the feature is enabled.
*
* @uses current_theme_supports, self::archive_supports_infinity, self::get_settings, add_filter, wp_enqueue_script, plugins_url, wp_enqueue_style, add_action
* @action template_redirect
* @return null
*/
function action_template_redirect() {
// Check that we support infinite scroll, and are on the home page.
//print_r(current_theme_supports( 'infinite-transporter' )); die();
if ( ! current_theme_supports( 'infinite-transporter' ) || ! self::archive_supports_infinity() )
return;
$id = self::get_settings()->container;
// Check that we have an id.
if ( empty( $id ) )
return;
// Make sure there are enough posts for IS
if ( 'click' == self::get_settings()->type && self::is_last_batch() )
return;
// Add a class to the body.
add_filter( 'body_class', array( $this, 'body_class' ) );
// Add our scripts.
wp_enqueue_script( 'mcninja-post-transporter', plugins_url( 'transporter.js', __FILE__ ), array( 'jquery' ), 20141220, true );
// Add our default styles.
wp_enqueue_style( 'mcninja-post-transporter', plugins_url( 'transporter.css', __FILE__ ), array(), '20140422' );
add_action( 'wp_enqueue_scripts', array( $this, 'enqueue_spinner_scripts' ) );
add_action( 'wp_footer', array( $this, 'action_wp_footer_settings' ), 2 );
add_action( 'wp_footer', array( $this, 'action_wp_footer' ), 21 ); // Core prints footer scripts at priority 20, so we just need to be one later than that
add_filter( 'infinite_transporter_results', array( $this, 'filter_infinite_transporter_results' ), 10, 3 );
}
/**
* Enqueue spinner scripts.
*/
function enqueue_spinner_scripts() {
wp_enqueue_script( 'jquery.spin' );
}
/**
* Adds an 'infinite-transporter' class to the body.
*/
function body_class( $classes ) {
$classes[] = 'infinite-scroll';
if ( 'scroll' == self::get_settings()->type )
$classes[] = 'neverending';
return $classes;
}
/**
* Grab the timestamp for the initial query's last post.
*
* This takes into account the query's 'orderby' parameter and returns
* false if the posts are not ordered by date.
*
* @uses self::got_infinity
* @uses self::wp_query
* @return string 'Y-m-d H:i:s' or false
*/
function get_last_post_date() {
if ( self::got_infinity() )
return;
$post = end( self::wp_query()->posts );
$orderby = isset( self::wp_query()->query_vars['orderby'] ) ?
self::wp_query()->query_vars['orderby'] : '';
$post_date = ( ! empty( $post->post_date ) ? $post->post_date : false );
switch ( $orderby ) {
case 'modified':
return $post->post_modified;
case 'date':
case '':
return $post_date;
default:
return false;
}
}
/**
* Returns the appropriate `wp_posts` table field for a given query's
* 'orderby' parameter, if applicable.
*
* @param optional object $query
* @uses self::wp_query
* @return string or false
*/
function get_query_sort_field( $query = null ) {
if ( empty( $query ) )
$query = self::wp_query();
$orderby = isset( $query->query_vars['orderby'] ) ? $query->query_vars['orderby'] : '';
switch ( $orderby ) {
case 'modified':
return 'post_modified';
case 'date':
case '':
return 'post_date';
default:
return false;
}
}
/**
* Create a where clause that will make sure post queries
* will always return results prior to (descending sort)
* or before (ascending sort) the last post date.
*
* @global $wpdb
* @param string $where
* @param object $query
* @uses apply_filters
* @filter posts_where
* @return string
*/
function query_time_filter( $where, $query ) {
if ( self::got_infinity() ) {
if( isset( $_REQUEST['postID'] ) && $_REQUEST['postID'] != 0 ) {
return $where;
}
global $wpdb;
$sort_field = self::get_query_sort_field( $query );
if ( false == $sort_field )
return $where;
$last_post_date = $_REQUEST['last_post_date'];
// Sanitize timestamp
if ( empty( $last_post_date ) || !preg_match( '|\d{4}\-\d{2}\-\d{2}|', $last_post_date ) )
return $where;
$operator = 'ASC' == $_REQUEST['query_args']['order'] ? '>' : '<';
// Construct the date query using our timestamp
$clause = $wpdb->prepare( " AND {$wpdb->posts}.{$sort_field} {$operator} %s", $last_post_date );
$where .= apply_filters( 'infinite_transporter_posts_where', $clause, $query, $operator, $last_post_date );
}
return $where;
}
/**
* Let's overwrite the default post_per_page setting to always display a fixed amount.
*
* @param object $query
* @uses is_admin, self::archive_supports_infinity, self::get_settings
* @return null
*/
function posts_per_page_query( $query ) {
if ( ! is_admin() && self::archive_supports_infinity() && $query->is_main_query() )
$query->set( 'posts_per_page', self::get_settings()->posts_per_page );
}
/**
* Check if the IS output should be wrapped in a div.
* Setting value can be a boolean or a string specifying the class applied to the div.
*
* @uses self::get_settings
* @return bool
*/
function has_wrapper() {
return (bool) self::get_settings()->wrapper;
}
/**
* Returns the Ajax url
*
* @global $wp
* @uses home_url, add_query_arg, apply_filters
* @return string
*/
function ajax_url() {
$base_url = set_url_scheme( home_url( '/' ) );
$ajaxurl = add_query_arg( array( 'infinity' => 'scrolling' ), $base_url );
return apply_filters( 'infinite_transporter_ajax_url', $ajaxurl );
}
/**
* Our own Ajax response, avoiding calling admin-ajax
*/
function ajax_response() {
// Only proceed if the url query has a key of "Infinity"
if ( ! self::got_infinity() )
return false;
define( 'DOING_AJAX', true );
@header( 'Content-Type: text/html; charset=' . get_option( 'blog_charset' ) );
send_nosniff_header();
do_action( 'custom_ajax_infinite_transporter' );
die( '0' );
}
/**
* Alias for renamed class method.
*
* Previously, JS settings object was unnecessarily output in the document head.
* When the hook was changed, the method name no longer made sense.
*/
function action_wp_head() {
$this->action_wp_footer_settings();
}
/**
* Prints the relevant infinite scroll settings in JS.
*
* @global $wp_rewrite
* @uses self::get_settings, esc_js, esc_url_raw, self::has_wrapper, __, apply_filters, do_action
* @action wp_footer
* @return string
*/
function action_wp_footer_settings() {
global $wp_rewrite;
global $currentday;
// Default click handle text
$click_handle_text = __( 'Older posts', 'jetpack' );
// If a single CPT is displayed, use its plural name instead of "posts"
// Could be empty (posts) or an array of multiple post types.
// In the latter two cases cases, the default text is used, leaving the `infinite_transporter_js_settings` filter for further customization.
$post_type = self::wp_query()->get( 'post_type' );
if ( is_string( $post_type ) && ! empty( $post_type ) ) {
$post_type = get_post_type_object( $post_type );
if ( is_object( $post_type ) && ! is_wp_error( $post_type ) ) {
if ( isset( $post_type->labels->name ) ) {
$cpt_text = $post_type->labels->name;
} elseif ( isset( $post_type->label ) ) {
$cpt_text = $post_type->label;
}
if ( isset( $cpt_text ) ) {
$click_handle_text = sprintf( __( 'Older %s', 'jetpack' ), $cpt_text );
unset( $cpt_text );
}
}
}
unset( $post_type );
// Base JS settings
$js_settings = array(
'id' => self::get_settings()->container,
'ajaxurl' => esc_url_raw( self::ajax_url() ),
'type' => esc_js( self::get_settings()->type ),
'wrapper' => self::has_wrapper(),
'wrapper_class' => is_string( self::get_settings()->wrapper ) ? esc_js( self::get_settings()->wrapper ) : 'infinite-wrap',
'footer' => is_string( self::get_settings()->footer ) ? esc_js( self::get_settings()->footer ) : self::get_settings()->footer,
'click_handle' => esc_js( self::get_settings()->click_handle ),
'text' => esc_js( $click_handle_text ),
'totop' => esc_js( __( 'Scroll back to top', 'jetpack' ) ),
'currentday' => $currentday,
'order' => 'DESC',
'scripts' => array(),
'styles' => array(),
'google_analytics' => esc_js( self::get_settings()->google_analytics ),
'offset' => self::wp_query()->get( 'paged' ),
'history' => array(
'host' => preg_replace( '#^http(s)?://#i', '', untrailingslashit( get_option( 'home' ) ) ),
'path' => self::get_request_path(),
'use_trailing_slashes' => $wp_rewrite->use_trailing_slashes,
'parameters' => self::get_request_parameters(),
),
'query_args' => self::wp_query()->query_vars,
'last_post_date' => self::get_last_post_date(),
);
// Optional order param
if ( isset( $_REQUEST['order'] ) ) {
$order = strtoupper( $_REQUEST['order'] );
if ( in_array( $order, array( 'ASC', 'DESC' ) ) )
$js_settings['order'] = $order;
}
if( is_single() ){
global $post;
$js_settings['postID'] = $post->ID;
$js_settings['postTitle'] = strip_tags( $post->post_title );
$js_settings['postUrl'] = get_permalink( $post->ID );
}
$js_settings = apply_filters( 'infinite_transporter_js_settings', $js_settings );
do_action( 'infinite_transporter_wp_head' );
?>
<script type="text/javascript">
//<![CDATA[
var infiniteScroll = <?php echo json_encode( array( 'settings' => $js_settings ) ); ?>;
//]]>
</script>
<?php
}
/**
* Build path data for current request.
* Used for Google Analytics and pushState history tracking.
*
* @global $wp_rewrite
* @global $wp
* @uses user_trailingslashit, sanitize_text_field, add_query_arg
* @return string|bool
*/
private function get_request_path() {
global $wp_rewrite;
if ( $wp_rewrite->using_permalinks() ) {
global $wp;
// If called too early, bail
if ( ! isset( $wp->request ) )
return false;
// Determine path for paginated version of current request
if ( false != preg_match( '#' . $wp_rewrite->pagination_base . '/\d+/?$#i', $wp->request ) )
$path = preg_replace( '#' . $wp_rewrite->pagination_base . '/\d+$#i', $wp_rewrite->pagination_base . '/%d', $wp->request );
else
$path = $wp->request . '/' . $wp_rewrite->pagination_base . '/%d';
// Slashes everywhere we need them
if ( 0 !== strpos( $path, '/' ) )
$path = '/' . $path;
$path = user_trailingslashit( $path );
} else {
// Clean up raw $_REQUEST input
$path = array_map( 'sanitize_text_field', $_REQUEST );
$path = array_filter( $path );
$path['paged'] = '%d';
$path = add_query_arg( $path, '/' );
}
return empty( $path ) ? false : $path;
}
/**
* Return query string for current request, prefixed with '?'.
*
* @return string
*/
private function get_request_parameters() {
$uri = $_SERVER[ 'REQUEST_URI' ];
$uri = preg_replace( '/^[^?]*(\?.*$)/', '$1', $uri, 1, $count );
if ( $count != 1 )
return '';
return $uri;
}
/**
* Provide IS with a list of the scripts and stylesheets already present on the page.
* Since posts may contain require additional assets that haven't been loaded, this data will be used to track the additional assets.
*
* @global $wp_scripts, $wp_styles
* @action wp_footer
* @return string
*/
function action_wp_footer() {
global $wp_scripts, $wp_styles;
$scripts = is_a( $wp_scripts, 'WP_Scripts' ) ? $wp_scripts->done : array();
$scripts = apply_filters( 'infinite_transporter_existing_scripts', $scripts );
$styles = is_a( $wp_styles, 'WP_Styles' ) ? $wp_styles->done : array();
$styles = apply_filters( 'infinite_transporter_existing_stylesheets', $styles );
?><script type="text/javascript">
jQuery.extend( infiniteScroll.settings.scripts, <?php echo json_encode( $scripts ); ?> );
jQuery.extend( infiniteScroll.settings.styles, <?php echo json_encode( $styles ); ?> );
</script><?php
}
/**
* Identify additional scripts required by the latest set of IS posts and provide the necessary data to the IS response handler.
*
* @global $wp_scripts
* @uses sanitize_text_field, add_query_arg
* @filter infinite_transporter_results
* @return array
*/
function filter_infinite_transporter_results( $results, $query_args, $wp_query ) {
// Don't bother unless there are posts to display
if ( 'success' != $results['type'] )
return $results;
// Parse and sanitize the script handles already output
$initial_scripts = isset( $_REQUEST['scripts'] ) && is_array( $_REQUEST['scripts'] ) ? array_map( 'sanitize_text_field', $_REQUEST['scripts'] ) : false;
if ( is_array( $initial_scripts ) ) {
global $wp_scripts;
// Identify new scripts needed by the latest set of IS posts
$new_scripts = array_diff( $wp_scripts->done, $initial_scripts );
// If new scripts are needed, extract relevant data from $wp_scripts
if ( ! empty( $new_scripts ) ) {
$results['scripts'] = array();
foreach ( $new_scripts as $handle ) {
// Abort if somehow the handle doesn't correspond to a registered script
if ( ! isset( $wp_scripts->registered[ $handle ] ) )
continue;
// Provide basic script data
$script_data = array(
'handle' => $handle,
'footer' => ( is_array( $wp_scripts->in_footer ) && in_array( $handle, $wp_scripts->in_footer ) ),
'extra_data' => $wp_scripts->print_extra_script( $handle, false )
);
// Base source
$src = $wp_scripts->registered[ $handle ]->src;
// Take base_url into account
if ( strpos( $src, 'http' ) !== 0 )
$src = $wp_scripts->base_url . $src;
// Version and additional arguments
if ( null === $wp_scripts->registered[ $handle ]->ver )
$ver = '';
else
$ver = $wp_scripts->registered[ $handle ]->ver ? $wp_scripts->registered[ $handle ]->ver : $wp_scripts->default_version;
if ( isset( $wp_scripts->args[ $handle ] ) )
$ver = $ver ? $ver . '&' . $wp_scripts->args[$handle] : $wp_scripts->args[$handle];
// Full script source with version info
$script_data['src'] = add_query_arg( 'ver', $ver, $src );
// Add script to data that will be returned to IS JS
array_push( $results['scripts'], $script_data );
}
}
}
// Expose additional script data to filters, but only include in final `$results` array if needed.
if ( ! isset( $results['scripts'] ) )
$results['scripts'] = array();
$results['scripts'] = apply_filters( 'infinite_transporter_additional_scripts', $results['scripts'], $initial_scripts, $results, $query_args, $wp_query );
if ( empty( $results['scripts'] ) )
unset( $results['scripts' ] );
// Parse and sanitize the style handles already output
$initial_styles = isset( $_REQUEST['styles'] ) && is_array( $_REQUEST['styles'] ) ? array_map( 'sanitize_text_field', $_REQUEST['styles'] ) : false;
if ( is_array( $initial_styles ) ) {
global $wp_styles;
// Identify new styles needed by the latest set of IS posts
$new_styles = array_diff( $wp_styles->done, $initial_styles );
// If new styles are needed, extract relevant data from $wp_styles
if ( ! empty( $new_styles ) ) {
$results['styles'] = array();
foreach ( $new_styles as $handle ) {
// Abort if somehow the handle doesn't correspond to a registered stylesheet
if ( ! isset( $wp_styles->registered[ $handle ] ) )
continue;
// Provide basic style data
$style_data = array(
'handle' => $handle,
'media' => 'all'
);
// Base source
$src = $wp_styles->registered[ $handle ]->src;
// Take base_url into account
if ( strpos( $src, 'http' ) !== 0 )
$src = $wp_styles->base_url . $src;
// Version and additional arguments
if ( null === $wp_styles->registered[ $handle ]->ver )
$ver = '';
else
$ver = $wp_styles->registered[ $handle ]->ver ? $wp_styles->registered[ $handle ]->ver : $wp_styles->default_version;
if ( isset($wp_styles->args[ $handle ] ) )
$ver = $ver ? $ver . '&' . $wp_styles->args[$handle] : $wp_styles->args[$handle];
// Full stylesheet source with version info
$style_data['src'] = add_query_arg( 'ver', $ver, $src );
// Parse stylesheet's conditional comments if present, converting to logic executable in JS
if ( isset( $wp_styles->registered[ $handle ]->extra['conditional'] ) && $wp_styles->registered[ $handle ]->extra['conditional'] ) {
// First, convert conditional comment operators to standard logical operators. %ver is replaced in JS with the IE version
$style_data['conditional'] = str_replace( array(
'lte',
'lt',
'gte',
'gt'
), array(
'%ver <=',
'%ver <',
'%ver >=',
'%ver >',
), $wp_styles->registered[ $handle ]->extra['conditional'] );
// Next, replace any !IE checks. These shouldn't be present since WP's conditional stylesheet implementation doesn't support them, but someone could be _doing_it_wrong().
$style_data['conditional'] = preg_replace( '#!\s*IE(\s*\d+){0}#i', '1==2', $style_data['conditional'] );
// Lastly, remove the IE strings
$style_data['conditional'] = str_replace( 'IE', '', $style_data['conditional'] );
}
// Parse requested media context for stylesheet
if ( isset( $wp_styles->registered[ $handle ]->args ) )
$style_data['media'] = esc_attr( $wp_styles->registered[ $handle ]->args );
// Add stylesheet to data that will be returned to IS JS
array_push( $results['styles'], $style_data );
}
}
}
// Expose additional stylesheet data to filters, but only include in final `$results` array if needed.
if ( ! isset( $results['styles'] ) )
$results['styles'] = array();
$results['styles'] = apply_filters( 'infinite_transporter_additional_stylesheets', $results['styles'], $initial_styles, $results, $query_args, $wp_query );
if ( empty( $results['styles'] ) )
unset( $results['styles' ] );
// Lastly, return the IS results array
return $results;
}
/**
* Runs the query and returns the results via JSON.
* Triggered by an AJAX request.
*
* @global $wp_query
* @global $wp_the_query
* @uses current_theme_supports, get_option, self::wp_query, current_user_can, apply_filters, self::get_settings, add_filter, WP_Query, remove_filter, have_posts, wp_head, do_action, add_action, this::render, this::has_wrapper, esc_attr, wp_footer, sharing_register_post_for_share_counts, get_the_id
* @return string or null
*/
function query() {
if ( ! isset( $_REQUEST['page'] ) || ! current_theme_supports( 'infinite-transporter' ) )
die;
$page = (int) $_REQUEST['page'];
// Sanitize and set $previousday. Expected format: dd.mm.yy
if ( preg_match( '/^\d{2}\.\d{2}\.\d{2}$/', $_REQUEST['currentday'] ) ) {
global $previousday;
$previousday = $_REQUEST['currentday'];
}
$sticky = get_option( 'sticky_posts' );
$post__not_in = self::wp_query()->get( 'post__not_in' );
if ( ! empty( $post__not_in ) )
$sticky = array_unique( array_merge( $sticky, $post__not_in ) );
$post_status = array( 'publish' );
if ( current_user_can( 'read_private_posts' ) )
array_push( $post_status, 'private' );
$order = in_array( $_REQUEST['order'], array( 'ASC', 'DESC' ) ) ? $_REQUEST['order'] : 'DESC';
$query_args = array_merge( self::wp_query()->query_vars, array(
'paged' => $page,
'post_status' => $post_status,
'posts_per_page' => self::get_settings()->posts_per_page,
'post__not_in' => ( array ) $sticky,
'order' => $order
) );
// 4.0 ?s= compatibility, see https://core.trac.wordpress.org/ticket/11330#comment:50
if ( empty( $query_args['s'] ) && ! isset( self::wp_query()->query['s'] ) ) {
unset( $query_args['s'] );
}
// By default, don't query for a specific page of a paged post object.
// This argument can come from merging self::wp_query() into $query_args above.
// Since IS is only used on archives, we should always display the first page of any paged content.
unset( $query_args['page'] );
$query_args = apply_filters( 'infinite_transporter_query_args', $query_args );
$single_query = false;
if( isset( $_REQUEST['postID'] ) && $_REQUEST['postID'] != 0 ) {
$single_query = true;
$post_order = apply_filters( 'infinite_transporter_post_order', self::get_settings()->post_order );
// Post type of initial post
$post_type = get_post_type( $_REQUEST['postID'] );
// Allow filtering of initial post type by themes or plugins
$the_post_type = apply_filters( 'infinite_transporter_post_type', $post_type );
// Only display posts from the same category as initial post
$in_same_cat = apply_filters( 'infinite_transporter_in_same_cat', false );
if( $post_order ) {
$next_post = $this->infinite_transporter_get_adjacent_post( $_REQUEST['postID_order'], $in_same_cat );
if( ! $next_post ) {
die();
}
$query_args = array(
'p' => $next_post->ID,
'post_type' => $the_post_type,
'posts_per_page' => 1,
);
} else {
$query_args = array(
'posts_per_page' => 1,
'post_type' => $the_post_type,
'offset' => $_REQUEST['page'] - 1,
'post__not_in' => array( $_REQUEST['postID'] ),
'ignore_sticky_posts' => true
);
}
$query_args = apply_filters( 'single_infinite_transporter_query_args', $query_args );
}
// Add query filter that checks for posts below the date
add_filter( 'posts_where', array( $this, 'query_time_filter' ), 10, 2 );
$transporter_query = new WP_Query( $query_args );
if( $single_query ) {
$transporter_query->is_single = true;
$transporter_query->is_singular = true;
}
$GLOBALS['wp_the_query'] = $GLOBALS['wp_query'] = $transporter_query;
remove_filter( 'posts_where', array( $this, 'query_time_filter' ), 10, 2 );
$results = array();
if ( have_posts() ) {
// Fire wp_head to ensure that all necessary scripts are enqueued. Output isn't used, but scripts are extracted in self::action_wp_footer.
ob_start();
wp_head();
ob_end_clean();
$results['type'] = 'success';
// First, try theme's specified rendering handler, either specified via `add_theme_support` or by hooking to this action directly.
ob_start();
do_action( 'infinite_transporter_render' );
$results['html'] = ob_get_clean();
// Fall back if a theme doesn't specify a rendering function. Because themes may hook additional functions to the `infinite_transporter_render` action, `has_action()` is ineffective here.
if ( empty( $results['html'] ) ) {
add_action( 'infinite_transporter_render', array( $this, 'render' ) );
rewind_posts();
ob_start();
do_action( 'infinite_transporter_render' );
$results['html'] = ob_get_clean();
}
// If primary and fallback rendering methods fail, prevent further IS rendering attempts. Otherwise, wrap the output if requested.