<?php

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/**

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* Post Data source for Block Bindings.

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*

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* @since 6.9.0

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* @package WordPress

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* @subpackage Block Bindings

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*/

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/**

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* Gets value for Post Data source.

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*

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* @since 6.9.0

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* @access private

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*

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* @param array $source_args Array containing arguments used to look up the source value.

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* Example: array( "field" => "foo" ).

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* @param WP_Block $block_instance The block instance.

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* @return mixed The value computed for the source.

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*/

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function _block_bindings_post_data_get_value( array $source_args, $block_instance ) {

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if ( empty( $source_args['field'] ) ) {

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// Backward compatibility for when the source argument was called `key` in Gutenberg plugin.

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if ( empty( $source_args['key'] ) ) {

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return null;

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}

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$field = $source_args['key'];

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} else {

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$field = $source_args['field'];

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}

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/*

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* BACKWARDS COMPATIBILITY: Hardcoded exception for navigation blocks.

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* Required for WordPress 6.9+ navigation blocks. DO NOT REMOVE.

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*/

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$block_name = $block_instance->name ?? '';

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$is_navigation_block = in_array(

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$block_name,

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array( 'core/navigation-link', 'core/navigation-submenu' ),

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true

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);

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if ( $is_navigation_block ) {

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// Navigation blocks: read from block attributes.

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$post_id = $block_instance->attributes['id'] ?? null;

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} else {

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// All other blocks: use context.

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$post_id = $block_instance->context['postId'] ?? null;

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}

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// If we don't have an entity ID, bail early.

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if ( empty( $post_id ) ) {

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return null;

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}

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// If a post isn't public, we need to prevent unauthorized users from accessing the post data.

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$post = get_post( $post_id );

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if ( ( ! is_post_publicly_viewable( $post ) && ! current_user_can( 'read_post', $post_id ) ) || post_password_required( $post ) ) {

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return null;

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}

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if ( 'date' === $field ) {

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return esc_attr( get_the_date( 'c', $post_id ) );

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}

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if ( 'modified' === $field ) {

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// Only return the modified date if it is later than the publishing date.

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if ( get_the_modified_date( 'U', $post_id ) > get_the_date( 'U', $post_id ) ) {

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return esc_attr( get_the_modified_date( 'c', $post_id ) );

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} else {

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return '';

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}

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}

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if ( 'link' === $field ) {

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$permalink = get_permalink( $post_id );

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return false === $permalink ? null : esc_url( $permalink );

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}

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}

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/**

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* Registers Post Data source in the block bindings registry.

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*

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* @since 6.9.0

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* @access private

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*/

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function _register_block_bindings_post_data_source() {

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register_block_bindings_source(

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'core/post-data',

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array(

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'label' => _x( 'Post Data', 'block bindings source' ),

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'get_value_callback' => '_block_bindings_post_data_get_value',

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'uses_context' => array( 'postId', 'postType' ), // Both are needed on the client side.

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)

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);

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}

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add_action( 'init', '_register_block_bindings_post_data_source' );

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