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<?php
/**
* Author: Andrei Baicus <andrei@themeisle.com>
* Created on: 31/08/2018
*
* @package Neve\Views\Pluggable
*/
namespace Neve\Views\Pluggable;
use Neve\Views\Base_View;
/**
* Class Pagination
*
* @package Neve\Views\Pluggable
*/
class Pagination extends Base_View {
/**
* Function that is run after instantiation.
*
* @return void
*/
public function init() {
add_action( 'rest_api_init', array( $this, 'register_endpoints' ) );
add_filter( 'neve_filter_main_script_localization', array( $this, 'filter_localization' ) );
add_action( 'neve_do_pagination', array( $this, 'render_pagination' ) );
add_action( 'neve_post_navigation', array( $this, 'render_post_navigation' ) );
}
/**
* Register Rest API endpoint for posts retrieval.
*/
public function register_endpoints() {
register_rest_route(
'nv/v1/posts',
'/page/(?P<page_number>\d+)/',
array(
'methods' => \WP_REST_Server::CREATABLE,
'callback' => array( $this, 'get_posts' ),
'permission_callback' => '__return_true',
)
);
}
/**
* Get paginated posts.
*
* @param \WP_REST_Request $request the rest request.
*
* @return \WP_REST_Response
*/
public function get_posts( \WP_REST_Request $request ) {
if ( empty( $request['page_number'] ) ) {
return new \WP_REST_Response( '' );
}
$query_args = $request->get_body();
$args = json_decode( $query_args, true );
$args['posts_per_page'] = get_option( 'posts_per_page' );
$args['post_type'] = 'post';
$args['paged'] = $request['page_number'];
$args['ignore_sticky_posts'] = 1;
$args['post_status'] = 'publish';
$output = '';
$query = new \WP_Query( $args );
if ( $query->have_posts() ) {
ob_start();
while ( $query->have_posts() ) {
$query->the_post();
get_template_part( 'template-parts/content' );
}
wp_reset_postdata();
$output = ob_get_contents();
ob_end_clean();
}
return new \WP_REST_Response( $output );
}
/**
* Filter localization to add infinite scroll to the main script.
*
* @param array $data localization array.
*
* @return array
*/
public function filter_localization( $data ) {
if ( ! $this->has_infinite_scroll() ) {
return $data;
}
global $wp_query;
$max_pages = $wp_query->max_num_pages;
$data['infiniteScroll'] = 'enabled';
$data['infiniteScrollMaxPages'] = $max_pages;
$data['infiniteScrollEndpoint'] = rest_url( 'nv/v1/posts/page/' );
$data['infiniteScrollQuery'] = wp_json_encode( $wp_query->query );
return $data;
}
/**
* Render the pagination.
*
* @param string $context not yet used might come in handy later.
*/
public function render_pagination( $context ) {
if ( $context === 'single' ) {
$this->render_single_pagination();
return;
}
if ( ! $this->has_infinite_scroll() ) {
if ( is_paged() ) {
do_action( 'neve_before_pagination' );
}
echo wp_kses_post(
paginate_links(
array(
'type' => 'list',
)
)
);
return;
}
echo wp_kses_post( '<div class="load-more-posts"><span class="nv-loader" style="display: none;"></span><span class="infinite-scroll-trigger"></span></div>' );
}
/**
* Render single post / page pagination.
*/
private function render_single_pagination() {
wp_link_pages(
array(
'before' => '<div class="post-pages-links"><span>' . apply_filters( 'neve_page_link_before', esc_html__( 'Pages:', 'neve' ) ) . '</span>',
'after' => '</div>',
'link_before' => '<span>',
'link_after' => '</span>',
)
);
}
/**
* Render single post navigation links
*/
public function render_post_navigation() {
$prev_format = '<div class="previous">%link</div>';
$next_format = '<div class="next">%link</div>';
$prev_link = sprintf(
'<span class="nav-direction">%1$s</span><span>%2$s</span>',
esc_html__( 'previous', 'neve' ),
'%title'
);
$next_link = sprintf(
'<span class="nav-direction">%1$s</span><span>%2$s</span>',
esc_html__( 'next', 'neve' ),
'%title'
);
echo '<div class="nv-post-navigation">';
previous_post_link( $prev_format, $prev_link );
next_post_link( $next_format, $next_link );
echo '</div>';
}
/**
* Has infinite scroll.
*
* @return string
*/
private function has_infinite_scroll() {
if ( neve_is_amp() ) {
return false;
}
if ( is_search() ) {
return false;
}
$pagination_type = get_theme_mod( 'neve_pagination_type', 'number' );
if ( $pagination_type === 'infinite' ) {
return true;
}
return false;
}
}