<?php

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/**

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* Server-side rendering of the `core/query-pagination-previous` block.

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*

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* @package WordPress

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*/

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/**

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* Renders the `core/query-pagination-previous` block on the server.

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*

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* @since 5.8.0

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*

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* @param array $attributes Block attributes.

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* @param string $content Block default content.

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* @param WP_Block $block Block instance.

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*

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* @return string Returns the previous posts link for the query.

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*/

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function render_block_core_query_pagination_previous( $attributes, $content, $block ) {

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$page_key = isset( $block->context['queryId'] ) ? 'query-' . $block->context['queryId'] . '-page' : 'query-page';

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$enhanced_pagination = isset( $block->context['enhancedPagination'] ) && $block->context['enhancedPagination'];

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$max_page = isset( $block->context['query']['pages'] ) ? (int) $block->context['query']['pages'] : 0;

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$page = empty( $_GET[ $page_key ] ) ? 1 : (int) $_GET[ $page_key ];

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$wrapper_attributes = get_block_wrapper_attributes();

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$show_label = isset( $block->context['showLabel'] ) ? (bool) $block->context['showLabel'] : true;

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$default_label = __( 'Previous Page' );

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$label_text = isset( $attributes['label'] ) && ! empty( $attributes['label'] ) ? esc_html( $attributes['label'] ) : $default_label;

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$label = $show_label ? $label_text : '';

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$pagination_arrow = get_query_pagination_arrow( $block, false );

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if ( ! $label ) {

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$wrapper_attributes .= ' aria-label="' . $label_text . '"';

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}

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if ( $pagination_arrow ) {

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$label = $pagination_arrow . $label;

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}

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$content = '';

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// Check if the pagination is for Query that inherits the global context

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// and handle appropriately.

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if ( isset( $block->context['query']['inherit'] ) && $block->context['query']['inherit'] ) {

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$filter_link_attributes = static function () use ( $wrapper_attributes ) {

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return $wrapper_attributes;

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};

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add_filter( 'previous_posts_link_attributes', $filter_link_attributes );

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$content = get_previous_posts_link( $label );

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remove_filter( 'previous_posts_link_attributes', $filter_link_attributes );

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} else {

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$block_query = new WP_Query( build_query_vars_from_query_block( $block, $page ) );

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$block_max_pages = $block_query->max_num_pages;

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$total = ! $max_page || $max_page > $block_max_pages ? $block_max_pages : $max_page;

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wp_reset_postdata();

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if ( 1 < $page && $page <= $total ) {

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$content = sprintf(

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'<a href="%1$s" %2$s>%3$s</a>',

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esc_url( add_query_arg( $page_key, $page - 1 ) ),

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$wrapper_attributes,

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$label

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);

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}

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}

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if ( $enhanced_pagination && isset( $content ) ) {

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$p = new WP_HTML_Tag_Processor( $content );

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if ( $p->next_tag(

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array(

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'tag_name' => 'a',

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'class_name' => 'wp-block-query-pagination-previous',

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)

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) ) {

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$p->set_attribute( 'data-wp-key', 'query-pagination-previous' );

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$p->set_attribute( 'data-wp-on--click', 'core/query::actions.navigate' );

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$p->set_attribute( 'data-wp-on-async--mouseenter', 'core/query::actions.prefetch' );

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$p->set_attribute( 'data-wp-watch', 'core/query::callbacks.prefetch' );

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$content = $p->get_updated_html();

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}

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}

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return $content;

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}

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/**

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* Registers the `core/query-pagination-previous` block on the server.

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*

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* @since 5.8.0

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*/

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function register_block_core_query_pagination_previous() {

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register_block_type_from_metadata(

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__DIR__ . '/query-pagination-previous',

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array(

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'render_callback' => 'render_block_core_query_pagination_previous',

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)

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);

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}

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add_action( 'init', 'register_block_core_query_pagination_previous' );

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