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<?php
/**
* Adds support for Jetpack Subscription Site feature.
*
* @package automattic/jetpack
* @since 13.2
*/
namespace Automattic\Jetpack\Extensions\Subscriptions;
use Jetpack_Memberships;
use WP_Block_Template;
use WP_Post;
/**
* Jetpack_Subscription_Site class.
*/
class Jetpack_Subscription_Site {
/**
* Jetpack_Subscription_Site singleton instance.
*
* @var Jetpack_Subscription_Site|null
*/
private static $instance;
/**
* Jetpack_Subscription_Site instance init.
*/
public static function init() {
if ( self::$instance === null ) {
self::$instance = new Jetpack_Subscription_Site();
}
return self::$instance;
}
/**
* Handles Subscribe block placements.
*
* @return void
*/
public function handle_subscribe_block_placements() {
$this->handle_subscribe_block_post_end_placement();
$this->handle_subscribe_block_navigation_placement();
}
/**
* Returns true if current user can view the post.
*
* @return bool
*/
protected function user_can_view_post() {
if ( ! class_exists( 'Jetpack_Memberships' ) ) {
return true;
}
return Jetpack_Memberships::user_can_view_post();
}
/**
* Returns post end placement hooked block attributes.
*
* @param array $default_attrs Deafult attributes.
* @param array $anchor_block The anchor block, in parsed block array format.
*
* @return array
*/
protected function get_post_end_placement_block_attributes( $default_attrs, $anchor_block ) {
if ( ! empty( $anchor_block['attrs']['layout']['type'] ) ) {
return array_merge(
$default_attrs,
array(
'layout' => array(
'type' => $anchor_block['attrs']['layout']['type'],
),
)
);
}
if ( ! empty( $anchor_block['attrs']['layout']['inherit'] ) ) {
return array_merge(
$default_attrs,
array(
'layout' => array(
'inherit' => $anchor_block['attrs']['layout']['inherit'],
),
)
);
}
return $default_attrs;
}
/**
* Returns true if context is recognized as a header element.
*
* @param WP_Block_Template|WP_Post|array $context The block template, template part, or pattern the anchor block belongs to.
*
* @return bool
*/
protected function is_header_context( $context ) {
if ( $context instanceof WP_Post && $context->post_type === 'wp_navigation' ) {
return true;
}
if ( $context instanceof WP_Block_Template && $context->area === 'header' ) {
return true;
}
return false;
}
/**
* Returns true if context is recognized as a single post element.
*
* @param WP_Block_Template|WP_Post|array $context The block template, template part, or pattern the anchor block belongs to.
*
* @return bool
*/
protected function is_single_post_context( $context ) {
/**
* Some themes are not returning a WP_Block_Template. In that case, we need to check with is_singular function.
*/
if ( is_array( $context ) ) {
return is_singular( 'post' );
}
return $context instanceof WP_Block_Template && $context->slug === 'single';
}
/**
* Handles Subscription block navigation placement.
*
* @return void
*/
protected function handle_subscribe_block_navigation_placement() {
$is_enabled = get_option( 'jetpack_subscriptions_subscribe_navigation_enabled', false );
if ( ! $is_enabled ) {
return;
}
if ( ! wp_is_block_theme() ) { // TODO Fallback for classic themes.
return;
}
add_filter(
'hooked_block_types',
function ( $hooked_blocks, $relative_position, $anchor_block, $context ) {
if (
$anchor_block === 'core/navigation' &&
$relative_position === 'last_child' &&
self::is_header_context( $context )
) {
$hooked_blocks[] = 'jetpack/subscriptions';
}
return $hooked_blocks;
},
10,
4
);
add_filter(
'hooked_block_jetpack/subscriptions',
function ( $hooked_block, $hooked_block_type, $relative_position, $anchor_block ) {
$is_navigation_anchor_block = isset( $anchor_block['blockName'] ) && $anchor_block['blockName'] === 'core/navigation';
if ( $is_navigation_anchor_block ) {
$class_name = ( ! empty( $hooked_block['attrs'] ) && ! empty( $hooked_block['attrs']['className'] ) )
? $hooked_block['attrs']['className'] . ' is-style-button'
: 'is-style-button';
$hooked_block['attrs']['className'] = $class_name;
$hooked_block['attrs']['appSource'] = 'subscribe-block-navigation';
}
return $hooked_block;
},
10,
4
);
}
/**
* Handles Subscribe block placement at the end of each post.
*
* @return void
*/
protected function handle_subscribe_block_post_end_placement() {
$subscribe_post_end_enabled = get_option( 'jetpack_subscriptions_subscribe_post_end_enabled', false );
if ( ! $subscribe_post_end_enabled ) {
return;
}
if ( ! wp_is_block_theme() ) { // Fallback for classic themes.
add_filter(
'the_content',
function ( $content ) {
// Check if we're inside the main loop in a single Post.
if (
is_single() &&
in_the_loop() &&
is_main_query() &&
$this->user_can_view_post()
) {
// translators: %s is the name of the site.
$discover_more_from_text = sprintf( __( 'Discover more from %s', 'jetpack' ), get_bloginfo( 'name' ) );
$subscribe_text = __( 'Subscribe to get the latest posts sent to your email.', 'jetpack' );
return $content . do_blocks(
<<<HTML
<!-- wp:group {"style":{"spacing":{"padding":{"top":"0px","bottom":"0px","left":"0px","right":"0px"},"margin":{"top":"32px","bottom":"32px"}},"border":{"width":"0px","style":"none"}},"className":"has-border-color","layout":{"type":"default"}} -->
<div class="wp-block-group has-border-color" style="border-style:none;border-width:0px;margin-top:32px;margin-bottom:32px;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px">
<!-- wp:separator {"style":{"spacing":{"margin":{"bottom":"24px"}}},"className":"is-style-wide"} -->
<hr class="wp-block-separator has-alpha-channel-opacity is-style-wide" style="margin-bottom:24px"/>
<!-- /wp:separator -->
<!-- wp:heading {"textAlign":"center","level":3,"style":{"layout":{"selfStretch":"fit","flexSize":null},"spacing":{"margin":{"top":"4px","bottom":"10px"}}}} -->
<h3 class="wp-block-heading has-text-align-center" style="margin-top:4px;margin-bottom:10px">$discover_more_from_text</h3>
<!-- /wp:heading -->
<!-- wp:paragraph {"align":"center","style":{"typography":{"fontSize":"15px"},"spacing":{"margin":{"top":"10px","bottom":"10px"}}}} -->
<p class="has-text-align-center" style="margin-top:10px;margin-bottom:10px;font-size:15px">$subscribe_text</p>
<!-- /wp:paragraph -->
<!-- wp:group {"layout":{"type":"constrained","contentSize":"480px"}} -->
<div class="wp-block-group">
<!-- wp:jetpack/subscriptions {"appSource":"subscribe-block-post-end"} /-->
</div>
<!-- /wp:group -->
</div>
<!-- /wp:group -->
HTML
);
}
return $content;
},
100, // To insert it after the sharing blocks.
1
);
return;
}
add_filter(
'hooked_block_types',
function ( $hooked_blocks, $relative_position, $anchor_block, $context ) {
if (
$anchor_block === 'core/post-content' &&
$relative_position === 'after' &&
self::is_single_post_context( $context ) &&
$this->user_can_view_post()
) {
$hooked_blocks[] = 'jetpack/subscriptions';
}
return $hooked_blocks;
},
10,
4
);
add_filter(
'hooked_block_jetpack/subscriptions',
function ( $hooked_block, $hooked_block_type, $relative_position, $anchor_block ) {
$is_post_content_anchor_block = isset( $anchor_block['blockName'] ) && $anchor_block['blockName'] === 'core/post-content';
if ( $is_post_content_anchor_block && ( $relative_position === 'after' || $relative_position === 'before' ) ) {
$attrs = $this->get_post_end_placement_block_attributes(
array(
'style' => array(
'spacing' => array(
'margin' => array(
'top' => '48px',
'bottom' => '48px',
),
'padding' => array(
'top' => '5px',
'bottom' => '5px',
),
),
),
),
$anchor_block
);
// translators: %s is the name of the site.
$discover_more_from_text = sprintf( __( 'Discover more from %s', 'jetpack' ), get_bloginfo( 'name' ) );
$subscribe_text = __( 'Subscribe to get the latest posts sent to your email.', 'jetpack' );
$inner_content_begin = <<<HTML
<div class="wp-block-group" style="margin-top:48px;margin-bottom:48px;padding-top:5px;padding-bottom:5px">
<!-- wp:separator {"style":{"spacing":{"margin":{"bottom":"36px"}}},"className":"is-style-wide"} -->
<hr class="wp-block-separator has-alpha-channel-opacity is-style-wide" style="margin-bottom:36px"/>
<!-- /wp:separator -->
<!-- wp:heading {"textAlign":"center","level":3,"style":{"layout":{"selfStretch":"fit","flexSize":null},"spacing":{"margin":{"top":"4px","bottom":"10px"}}}} -->
<h3 class="wp-block-heading has-text-align-center" style="margin-top:4px;margin-bottom:10px">$discover_more_from_text</h3>
<!-- /wp:heading -->
<!-- wp:paragraph {"align":"center","style":{"typography":{"fontSize":"15px"},"spacing":{"margin":{"top":"4px","bottom":"0px"}}}} -->
<p class="has-text-align-center" style="margin-top:4px;margin-bottom:0px;font-size:15px">$subscribe_text</p>
<!-- /wp:paragraph -->
<!-- wp:group {"layout":{"type":"constrained","contentSize":"480px"}} -->
<div class="wp-block-group">
HTML;
$inner_content_end = <<<HTML
</div>
<!-- /wp:group -->
</div>
HTML;
$hooked_block['attrs']['appSource'] = 'subscribe-block-post-end';
return array(
'blockName' => 'core/group',
'attrs' => $attrs,
'innerBlocks' => array( $hooked_block ),
'innerContent' => array(
$inner_content_begin,
null,
$inner_content_end,
),
);
}
return $hooked_block;
},
10,
4
);
}
}