<?php
/**
 * Server-side rendering of the `core/read-more` block.
 *
 * @package WordPress
 */

/**
 * Renders the `core/read-more` block on the server.
 *
 * @since 6.0.0
 *
 * @param array    $attributes Block attributes.
 * @param string   $content    Block default content.
 * @param WP_Block $block      Block instance.
 * @return string  Returns the post link.
 */
function render_block_core_read_more( $attributes, $content, $block ) {
    if ( ! isset( $block->context['postId'] ) ) {
        return '';
    }

    $post_ID    = $block->context['postId'];
    $post_title = get_the_title( $post_ID );
    if ( '' === $post_title ) {
        $post_title = sprintf(
            /* translators: %s is post ID to describe the link for screen readers. */
            __( 'untitled post %s' ),
            $post_ID
        );
    }
    $screen_reader_text = sprintf(
        /* translators: %s is either the post title or post ID to describe the link for screen readers. */
        __( ': %s' ),
        $post_title
    );
    $justify_class_name = empty( $attributes['justifyContent'] ) ? '' : "is-justified-{$attributes['justifyContent']}";
    $wrapper_attributes = get_block_wrapper_attributes( array( 'class' => $justify_class_name ) );
    $more_text          = ! empty( $attributes['content'] ) ? wp_kses_post( $attributes['content'] ) : __( 'Read more' );
    return sprintf(
        '<a %1s href="%2s" target="%3s">%4s<span class="screen-reader-text">%5s</span></a>',
        $wrapper_attributes,
        get_the_permalink( $post_ID ),
        esc_attr( $attributes['linkTarget'] ),
        $more_text,
        $screen_reader_text
    );
}

/**
 * Registers the `core/read-more` block on the server.
 *
 * @since 6.0.0
 */
function register_block_core_read_more() {
    register_block_type_from_metadata(
        __DIR__ . '/read-more',
        array(
            'render_callback' => 'render_block_core_read_more',
        )
    );
}
add_action( 'init', 'register_block_core_read_more' );