<?php

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/**

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* Paywall Block.

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*

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* @since 12.5

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*

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* @package automattic/jetpack

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*/

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namespace Automattic\Jetpack\Extensions\Paywall;

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use Automattic\Jetpack\Blocks;

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if ( ! defined( 'ABSPATH' ) ) {

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exit( 0 );

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}

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const FEATURE_NAME = 'paywall';

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const BLOCK_NAME = 'jetpack/' . FEATURE_NAME;

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const BLOCK_HTML = '<!-- wp:' . BLOCK_NAME . ' /-->';

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const THE_EXCERPT_BLOCK = '[[[[[' . BLOCK_NAME . ']]]]]';

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/**

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* Registers the block for use in Gutenberg

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* This is done via an action so that we can disable

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* registration if we need to.

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*/

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function register_block() {

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if ( ! \Jetpack::is_module_active( 'subscriptions' ) ) {

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return;

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}

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if ( ! class_exists( '\Jetpack_Memberships' ) ) {

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return;

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}

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Blocks::jetpack_register_block(

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__DIR__,

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array(

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'render_callback' => __NAMESPACE__ . '\render_block',

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)

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);

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}

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add_action( 'init', __NAMESPACE__ . '\register_block' );

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/**

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* Paywall block render callback.

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*

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* @return string

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*/

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function render_block() {

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if ( doing_filter( 'get_the_excerpt' ) ) {

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if ( \Jetpack_Memberships::user_can_view_post() ) {

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return '';

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}

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return THE_EXCERPT_BLOCK;

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}

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return '';

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}

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/**

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* Adds the Paywall block to excerpt allowed blocks.

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*

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* @param array $allowed_blocks The allowed blocks.

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*

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* @return array The allowed blocks.

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*/

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function excerpt_allowed_blocks( $allowed_blocks ) {

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return array_merge( $allowed_blocks, array( Blocks::get_block_name( __DIR__ ) ) );

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}

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add_filter( 'excerpt_allowed_blocks', __NAMESPACE__ . '\excerpt_allowed_blocks' );

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