<?php

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/**

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* Server-side rendering of the `core/comments-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/comments-pagination-previous` block on the server.

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*

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* @since 6.0.0

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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 comments pagination.

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*/

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

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$default_label = __( 'Older Comments' );

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

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$pagination_arrow = get_comments_pagination_arrow( $block, 'previous' );

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if ( $pagination_arrow ) {

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$label = $pagination_arrow . $label;

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}

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$filter_link_attributes = static function () {

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return get_block_wrapper_attributes();

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};

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add_filter( 'previous_comments_link_attributes', $filter_link_attributes );

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$comment_vars = build_comment_query_vars_from_block( $block );

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$previous_comments_link = get_previous_comments_link( $label, $comment_vars['paged'] ?? null );

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remove_filter( 'previous_comments_link_attributes', $filter_link_attributes );

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if ( ! isset( $previous_comments_link ) ) {

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return '';

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}

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return $previous_comments_link;

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}

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/**

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

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*

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* @since 6.0.0

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*/

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function register_block_core_comments_pagination_previous() {

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register_block_type_from_metadata(

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__DIR__ . '/comments-pagination-previous',

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array(

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'render_callback' => 'render_block_core_comments_pagination_previous',

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)

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);

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}

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add_action( 'init', 'register_block_core_comments_pagination_previous' );

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