<?php

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/**

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* Adds support for Jetpack Subscription Site feature.

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*

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* @package automattic/jetpack

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* @since 13.2

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*/

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namespace Automattic\Jetpack\Extensions\Subscriptions;

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use Jetpack_Memberships;

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use WP_Block_Template;

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use WP_Post;

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/**

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* Jetpack_Subscription_Site class.

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*/

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class Jetpack_Subscription_Site {

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/**

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* Jetpack_Subscription_Site singleton instance.

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*

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* @var Jetpack_Subscription_Site|null

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*/

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private static $instance;

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/**

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* Jetpack_Subscription_Site instance init.

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*/

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public static function init() {

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if ( self::$instance === null ) {

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self::$instance = new Jetpack_Subscription_Site();

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}

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return self::$instance;

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}

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/**

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* Handles Subscribe block placements.

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*

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* @return void

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*/

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public function handle_subscribe_block_placements() {

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$this->handle_subscribe_block_post_end_placement();

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$this->handle_subscribe_block_navigation_placement();

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}

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/**

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* Returns true if current user can view the post.

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*

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* @return bool

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*/

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protected function user_can_view_post() {

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if ( ! class_exists( 'Jetpack_Memberships' ) ) {

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return true;

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}

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return Jetpack_Memberships::user_can_view_post();

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}

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/**

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* Returns post end placement hooked block attributes.

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*

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* @param array $default_attrs Deafult attributes.

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* @param array $anchor_block The anchor block, in parsed block array format.

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*

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* @return array

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*/

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protected function get_post_end_placement_block_attributes( $default_attrs, $anchor_block ) {

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if ( ! empty( $anchor_block['attrs']['layout']['type'] ) ) {

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return array_merge(

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$default_attrs,

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array(

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'layout' => array(

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'type' => $anchor_block['attrs']['layout']['type'],

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),

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)

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);

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}

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if ( ! empty( $anchor_block['attrs']['layout']['inherit'] ) ) {

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return array_merge(

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$default_attrs,

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array(

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'layout' => array(

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'inherit' => $anchor_block['attrs']['layout']['inherit'],

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),

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)

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);

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}

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return $default_attrs;

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}

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/**

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* Returns true if context is recognized as a header element.

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*

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* @param WP_Block_Template|WP_Post|array $context The block template, template part, or pattern the anchor block belongs to.

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*

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* @return bool

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*/

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protected function is_header_context( $context ) {

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if ( $context instanceof WP_Post && $context->post_type === 'wp_navigation' ) {

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return true;

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}

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if ( $context instanceof WP_Block_Template && $context->area === 'header' ) {

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return true;

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}

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return false;

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}

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/**

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* Returns true if context is recognized as a single post element.

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*

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* @param WP_Block_Template|WP_Post|array $context The block template, template part, or pattern the anchor block belongs to.

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*

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* @return bool

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*/

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protected function is_single_post_context( $context ) {

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/**

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* Some themes are not returning a WP_Block_Template. In that case, we need to check with is_singular function.

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*/

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if ( is_array( $context ) ) {

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return is_singular( 'post' );

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}

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return $context instanceof WP_Block_Template && $context->slug === 'single';

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}

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/**

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* Handles Subscription block navigation placement.

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*

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* @return void

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*/

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protected function handle_subscribe_block_navigation_placement() {

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$is_enabled = get_option( 'jetpack_subscriptions_subscribe_navigation_enabled', false );

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if ( ! $is_enabled ) {

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return;

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}

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if ( ! wp_is_block_theme() ) { // TODO Fallback for classic themes.

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return;

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}

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add_filter(

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'hooked_block_types',

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function ( $hooked_blocks, $relative_position, $anchor_block, $context ) {

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if (

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$anchor_block === 'core/navigation' &&

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$relative_position === 'last_child' &&

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self::is_header_context( $context )

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) {

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$hooked_blocks[] = 'jetpack/subscriptions';

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}

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return $hooked_blocks;

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},

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10,

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4

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);

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add_filter(

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'hooked_block_jetpack/subscriptions',

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function ( $hooked_block, $hooked_block_type, $relative_position, $anchor_block ) {

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$is_navigation_anchor_block = isset( $anchor_block['blockName'] ) && $anchor_block['blockName'] === 'core/navigation';

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if ( $is_navigation_anchor_block ) {

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$class_name = ( ! empty( $hooked_block['attrs'] ) && ! empty( $hooked_block['attrs']['className'] ) )

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? $hooked_block['attrs']['className'] . ' is-style-button'

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: 'is-style-button';

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$hooked_block['attrs']['className'] = $class_name;

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$hooked_block['attrs']['appSource'] = 'subscribe-block-navigation';

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}

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return $hooked_block;

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},

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10,

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4

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);

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}

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/**

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* Handles Subscribe block placement at the end of each post.

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*

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* @return void

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*/

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protected function handle_subscribe_block_post_end_placement() {

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$subscribe_post_end_enabled = get_option( 'jetpack_subscriptions_subscribe_post_end_enabled', false );

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if ( ! $subscribe_post_end_enabled ) {

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return;

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}

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if ( ! wp_is_block_theme() ) { // Fallback for classic themes.

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add_filter(

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'the_content',

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function ( $content ) {

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// Check if we're inside the main loop in a single Post.

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if (

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is_single() &&

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in_the_loop() &&

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is_main_query() &&

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$this->user_can_view_post()

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) {

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// translators: %s is the name of the site.

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$discover_more_from_text = sprintf( __( 'Discover more from %s', 'jetpack' ), get_bloginfo( 'name' ) );

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$subscribe_text = __( 'Subscribe to get the latest posts sent to your email.', 'jetpack' );

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return $content . do_blocks(

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<<<HTML

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<!-- wp:group {"style":{"spacing":{"padding":{"top":"0px","bottom":"0px","left":"0px","right":"0px"},"margin":{"top":"32px","bottom":"32px"}},"border":{"width":"0px","style":"none"}},"className":"has-border-color","layout":{"type":"default"}} -->

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<div class="wp-block-group has-border-color" style="border-style:none;border-width:0px;margin-top:32px;margin-bottom:32px;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px">

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<!-- wp:separator {"style":{"spacing":{"margin":{"bottom":"24px"}}},"className":"is-style-wide"} -->

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<hr class="wp-block-separator has-alpha-channel-opacity is-style-wide" style="margin-bottom:24px"/>

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<!-- /wp:separator -->

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<!-- wp:heading {"textAlign":"center","level":3,"style":{"layout":{"selfStretch":"fit","flexSize":null},"spacing":{"margin":{"top":"4px","bottom":"10px"}}}} -->

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<h3 class="wp-block-heading has-text-align-center" style="margin-top:4px;margin-bottom:10px">$discover_more_from_text</h3>

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<!-- /wp:heading -->

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<!-- wp:paragraph {"align":"center","style":{"typography":{"fontSize":"15px"},"spacing":{"margin":{"top":"10px","bottom":"10px"}}}} -->

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<p class="has-text-align-center" style="margin-top:10px;margin-bottom:10px;font-size:15px">$subscribe_text</p>

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<!-- /wp:paragraph -->

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<!-- wp:group {"layout":{"type":"constrained","contentSize":"480px"}} -->

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<div class="wp-block-group">

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<!-- wp:jetpack/subscriptions {"appSource":"subscribe-block-post-end"} /-->

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</div>

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<!-- /wp:group -->

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</div>

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<!-- /wp:group -->

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HTML

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);

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}

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return $content;

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},

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100, // To insert it after the sharing blocks.

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1

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);

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return;

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}

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add_filter(

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'hooked_block_types',

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function ( $hooked_blocks, $relative_position, $anchor_block, $context ) {

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if (

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$anchor_block === 'core/post-content' &&

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$relative_position === 'after' &&

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self::is_single_post_context( $context ) &&

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$this->user_can_view_post()

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) {

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$hooked_blocks[] = 'jetpack/subscriptions';

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}

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return $hooked_blocks;

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},

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10,

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4

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);

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add_filter(

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'hooked_block_jetpack/subscriptions',

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function ( $hooked_block, $hooked_block_type, $relative_position, $anchor_block ) {

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$is_post_content_anchor_block = isset( $anchor_block['blockName'] ) && $anchor_block['blockName'] === 'core/post-content';

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if ( $is_post_content_anchor_block && ( $relative_position === 'after' || $relative_position === 'before' ) ) {

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$attrs = $this->get_post_end_placement_block_attributes(

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array(

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'style' => array(

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'spacing' => array(

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'margin' => array(

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'top' => '48px',

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'bottom' => '48px',

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),

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'padding' => array(

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'top' => '5px',

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'bottom' => '5px',

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),

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),

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),

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),

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$anchor_block

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);

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// translators: %s is the name of the site.

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$discover_more_from_text = sprintf( __( 'Discover more from %s', 'jetpack' ), get_bloginfo( 'name' ) );

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$subscribe_text = __( 'Subscribe to get the latest posts sent to your email.', 'jetpack' );

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$inner_content_begin = <<<HTML

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<div class="wp-block-group" style="margin-top:48px;margin-bottom:48px;padding-top:5px;padding-bottom:5px">

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<!-- wp:separator {"style":{"spacing":{"margin":{"bottom":"36px"}}},"className":"is-style-wide"} -->

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<hr class="wp-block-separator has-alpha-channel-opacity is-style-wide" style="margin-bottom:36px"/>

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<!-- /wp:separator -->

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<!-- wp:heading {"textAlign":"center","level":3,"style":{"layout":{"selfStretch":"fit","flexSize":null},"spacing":{"margin":{"top":"4px","bottom":"10px"}}}} -->

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<h3 class="wp-block-heading has-text-align-center" style="margin-top:4px;margin-bottom:10px">$discover_more_from_text</h3>

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<!-- /wp:heading -->

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<!-- wp:paragraph {"align":"center","style":{"typography":{"fontSize":"15px"},"spacing":{"margin":{"top":"4px","bottom":"0px"}}}} -->

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<p class="has-text-align-center" style="margin-top:4px;margin-bottom:0px;font-size:15px">$subscribe_text</p>

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<!-- /wp:paragraph -->

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<!-- wp:group {"layout":{"type":"constrained","contentSize":"480px"}} -->

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<div class="wp-block-group">

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HTML;

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$inner_content_end = <<<HTML

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</div>

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<!-- /wp:group -->

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</div>

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HTML;

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$hooked_block['attrs']['appSource'] = 'subscribe-block-post-end';

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return array(

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'blockName' => 'core/group',

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'attrs' => $attrs,

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'innerBlocks' => array( $hooked_block ),

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'innerContent' => array(

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$inner_content_begin,

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null,

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$inner_content_end,

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),

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);

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}

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return $hooked_block;

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},

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10,

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4

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);

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}

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}

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