<?php
/**
 * Jetpack_Memberships: wrapper for memberships functions.
 *
 * @package    Jetpack
 * @since      7.3.0
 */

use Automattic\Jetpack\Blocks;
use Automattic\Jetpack\Extensions\Premium_Content\Subscription_Service\Abstract_Token_Subscription_Service;
use Automattic\Jetpack\Status\Host;
use const Automattic\Jetpack\Extensions\Subscriptions\META_NAME_FOR_POST_LEVEL_ACCESS_SETTINGS;
use const Automattic\Jetpack\Extensions\Subscriptions\META_NAME_FOR_POST_TIER_ID_SETTINGS;

require_once __DIR__ . '/../../extensions/blocks/subscriptions/constants.php';

/**
 * Class Jetpack_Memberships
 * This class represents the Memberships functionality.
 */
class Jetpack_Memberships {
	/**
	 * CSS class prefix to use in the styling.
	 *
	 * @var string
	 */
	public static $css_classname_prefix = 'jetpack-memberships';
	/**
	 * Our CPT type for the product (plan).
	 *
	 * @var string
	 */
	public static $post_type_plan = 'jp_mem_plan';

	/**
	 * Tier type for plans
	 *
	 * @var string
	 */
	public static $type_tier = 'tier';

	/**
	 * Option stores status for memberships (Stripe, etc.).
	 *
	 * @var string
	 */
	public static $has_connected_account_option_name = 'jetpack-memberships-has-connected-account';

	/**
	 * Post meta that will store the level of access for newsletters
	 *
	 * @var string
	 */
	public static $post_access_level_meta_name = META_NAME_FOR_POST_LEVEL_ACCESS_SETTINGS;

	/**
	 * Post meta that will store the tier ID of access for newsletters
	 *
	 * @var string
	 */
	public static $post_access_tier_meta_name = META_NAME_FOR_POST_TIER_ID_SETTINGS;

	/**
	 * Button block type to use.
	 *
	 * @var string
	 */
	private static $button_block_name = 'recurring-payments';

	/**
	 * These are defaults for wp_kses ran on the membership button.
	 *
	 * @var array
	 */
	private static $tags_allowed_in_the_button = array( 'br' => array() );

	/**
	 * The minimum required plan for this Gutenberg block.
	 *
	 * @var string Plan slug
	 */
	private static $required_plan;

	/**
	 * Track recurring payments block registration.
	 *
	 * @var boolean True if block registration has been executed.
	 */
	private static $has_registered_block = false;

	/**
	 * Classic singleton pattern
	 *
	 * @var Jetpack_Memberships
	 */
	private static $instance;

	/**
	 * Cached results of user_can_view_post() method.
	 *
	 * @var array
	 */
	private static $user_can_view_post_cache = array();

	/**
	 * Cached results of user_is_paid_subscriber() method.
	 *
	 * @var array
	 */
	private static $user_is_paid_subscriber_cache = array();

	/**
	 * Currencies we support and Stripe's minimum amount for a transaction in that currency.
	 *
	 * @link https://stripe.com/docs/currencies#minimum-and-maximum-charge-amounts
	 *
	 * List has to be in with `SUPPORTED_CURRENCIES` in extensions/shared/currencies.js.
	 */
	const SUPPORTED_CURRENCIES = array(
		'USD' => 0.5,
		'AUD' => 0.5,
		'BRL' => 0.5,
		'CAD' => 0.5,
		'CHF' => 0.5,
		'DKK' => 2.5,
		'EUR' => 0.5,
		'GBP' => 0.3,
		'HKD' => 4.0,
		'INR' => 0.5,
		'JPY' => 50,
		'MXN' => 10,
		'NOK' => 3.0,
		'NZD' => 0.5,
		'PLN' => 2.0,
		'SEK' => 3.0,
		'SGD' => 0.5,
	);

	/**
	 * Jetpack_Memberships constructor.
	 */
	private function __construct() {}

	/**
	 * The actual constructor initializing the object.
	 *
	 * @return Jetpack_Memberships
	 */
	public static function get_instance() {
		if ( ! self::$instance ) {
			self::$instance = new self();
			self::$instance->register_init_hook();
			// Yes, `pro-plan` with a dash, `jetpack_personal` with an underscore. Check the v1.5 endpoint to verify.
			$wpcom_plan_slug     = defined( 'ENABLE_PRO_PLAN' ) ? 'pro-plan' : 'personal-bundle';
			self::$required_plan = ( defined( 'IS_WPCOM' ) && IS_WPCOM ) ? $wpcom_plan_slug : 'jetpack_personal';
		}

		return self::$instance;
	}
	/**
	 * Get the map that defines the shape of CPT post. keys are names of fields and
	 * 'meta' is the name of actual WP post meta field that corresponds.
	 *
	 * @return array
	 */
	private static function get_plan_property_mapping() {
		$meta_prefix = 'jetpack_memberships_';
		$properties  = array(
			'price'           => array(
				'meta' => $meta_prefix . 'price',
			),
			'currency'        => array(
				'meta' => $meta_prefix . 'currency',
			),
			'site_subscriber' => array(
				'meta' => $meta_prefix . 'site_subscriber',
			),
			'product_id'      => array(
				'meta' => $meta_prefix . 'product_id',
			),
			'tier'            => array(
				'meta' => $meta_prefix . 'tier',
			),
			'is_deleted'      => array(
				'meta' => $meta_prefix . 'is_deleted',
			),
		);
		return $properties;
	}

	/**
	 * Inits further hooks on init hook.
	 */
	private function register_init_hook() {
		add_action( 'init', array( $this, 'init_hook_action' ) );
		add_action( 'jetpack_register_gutenberg_extensions', array( $this, 'register_gutenberg_block' ) );
	}

	/**
	 * Actual hooks initializing on init.
	 */
	public function init_hook_action() {
		add_filter( 'rest_api_allowed_post_types', array( $this, 'allow_rest_api_types' ) );
		add_filter( 'jetpack_sync_post_meta_whitelist', array( $this, 'allow_sync_post_meta' ) );
		$this->setup_cpts();
	}

	/**
	 * Sets up the custom post types for the module.
	 */
	private function setup_cpts() {
		/*
		 * PLAN data structure.
		 */
		$capabilities = array(
			'edit_post'          => 'edit_posts',
			'read_post'          => 'read_private_posts',
			'delete_post'        => 'delete_posts',
			'edit_posts'         => 'edit_posts',
			'edit_others_posts'  => 'edit_others_posts',
			'publish_posts'      => 'publish_posts',
			'read_private_posts' => 'read_private_posts',
		);
		$order_args   = array(
			'label'               => esc_html__( 'Plan', 'jetpack' ),
			'description'         => esc_html__( 'Recurring Payments plans', 'jetpack' ),
			'supports'            => array( 'title', 'custom-fields', 'content' ),
			'hierarchical'        => false,
			'public'              => false,
			'show_ui'             => false,
			'show_in_menu'        => false,
			'show_in_admin_bar'   => false,
			'show_in_nav_menus'   => false,
			'can_export'          => true,
			'has_archive'         => false,
			'exclude_from_search' => true,
			'publicly_queryable'  => false,
			'rewrite'             => false,
			'capabilities'        => $capabilities,
			'show_in_rest'        => false,
		);
		register_post_type( self::$post_type_plan, $order_args );
	}

	/**
	 * Allows custom post types to be used by REST API.
	 *
	 * @param array $post_types - other post types.
	 *
	 * @see hook 'rest_api_allowed_post_types'
	 * @return array
	 */
	public function allow_rest_api_types( $post_types ) {
		$post_types[] = self::$post_type_plan;

		return $post_types;
	}

	/**
	 * Allows custom meta fields to sync.
	 *
	 * @param array $post_meta - previously changet post meta.
	 *
	 * @return array
	 */
	public function allow_sync_post_meta( $post_meta ) {
		$meta_keys = array_map(
			array( $this, 'return_meta' ),
			self::get_plan_property_mapping()
		);
		return array_merge( $post_meta, array_values( $meta_keys ) );
	}

	/**
	 * This returns meta attribute of passet array.
	 * Used for array functions.
	 *
	 * @param array $map - stuff.
	 *
	 * @return mixed
	 */
	public function return_meta( $map ) {
		return $map['meta'];
	}

	/**
	 * Show an error to the user (or embed a clue in the HTML) when the button does not get rendered properly.
	 *
	 * @param WP_Error $error The error message with error code.
	 * @return string The error message rendered as HTML.
	 */
	public function render_button_error( $error ) {
		if ( $this->user_can_edit() ) {
			return '<div><strong>Jetpack Memberships Error: ' . $error->get_error_code() . '</strong><br />' . $error->get_error_message() . '</div>';
		}
		return '<div>Sorry! This product is not available for purchase at this time.</div><!-- Jetpack Memberships Error: ' . $error->get_error_code() . ' -->';
	}

	/**
	 * Renders a preview of the Recurring Payment button, which is not hooked
	 * up to the subscription url. Used to preview the block on the frontend
	 * for site editors when Stripe has not been connected.
	 *
	 * @param array  $attrs - attributes in the shortcode.
	 * @param string $content - Recurring Payment block content.
	 *
	 * @return string|void
	 */
	public function render_button_preview( $attrs, $content = null ) {
		if ( ! empty( $content ) ) {
			$block_id = esc_attr( wp_unique_id( 'recurring-payments-block-' ) );
			$content  = str_replace( 'recurring-payments-id', $block_id, $content );
			$content  = str_replace( 'wp-block-jetpack-recurring-payments', 'wp-block-jetpack-recurring-payments wp-block-button', $content );
			return $content;
		}
		return $this->deprecated_render_button_v1( $attrs, null );
	}

	/**
	 * Determines whether the button preview should be rendered. Returns true
	 * if the user has editing permissions, the button is not configured correctly
	 * (because it requires a plan upgrade or Stripe connection), and the
	 * button is a child of a Premium Content block.
	 *
	 * @param WP_Block $block Recurring Payments block instance.
	 *
	 * @return boolean
	 */
	public function should_render_button_preview( $block ) {
		$user_can_edit              = static::user_can_edit();
		$requires_stripe_connection = ! static::has_connected_account();

		$jetpack_ready = ! self::is_enabled_jetpack_recurring_payments();

		$is_premium_content_child = false;
		if ( isset( $block ) && isset( $block->context['isPremiumContentChild'] ) ) {
			$is_premium_content_child = (int) $block->context['isPremiumContentChild'];
		}

		return $is_premium_content_child &&
			$user_can_edit &&
			$requires_stripe_connection &&
			$jetpack_ready;
	}

	/**
	 * Callback that parses the membership purchase shortcode.
	 *
	 * @param array    $attributes - attributes in the shortcode. `id` here is the CPT id of the plan.
	 * @param string   $content - Recurring Payment block content.
	 * @param WP_Block $block - Recurring Payment block instance.
	 *
	 * @return string|void - HTML for the button, void removes the button.
	 */
	public function render_button( $attributes, $content = null, $block = null ) {
		Jetpack_Gutenberg::load_assets_as_required( self::$button_block_name );

		if ( $this->should_render_button_preview( $block ) ) {
			return $this->render_button_preview( $attributes, $content );
		}

		if ( empty( $attributes['planId'] ) && empty( $attributes['planIds'] ) ) {
			return $this->render_button_error( new WP_Error( 'jetpack-memberships-rb-npi', __( 'No plan was configured for this button.', 'jetpack' ) . ' ' . __( 'Edit this post and confirm that an existing payment plan is selected for this block.', 'jetpack' ) ) );
		}

		// This is string of '+` separated plan ids. Loop through them and
		// filter out the ones that are not valid.
		$plan_ids = array();
		if ( ! empty( $attributes['planIds'] ) ) {
			$plan_ids = $attributes['planIds'];
		} elseif ( ! empty( $attributes['planId'] ) ) {
			$plan_ids = explode( '+', $attributes['planId'] );
		}
		$valid_plans = array();
		foreach ( $plan_ids as $plan_id ) {
			if ( ! is_numeric( $plan_id ) ) {
				continue;
			}
			$product = get_post( $plan_id );
			if ( ! $product ) {
				return $this->render_button_error( new WP_Error( 'jetpack-memberships-rb-npf', __( 'Could not find a plan for this button.', 'jetpack' ) . ' ' . __( 'Edit this post and confirm that the selected payment plan still exists and is available for purchase.', 'jetpack' ) ) );
			}
			if ( is_wp_error( $product ) ) {
				return $this->render_button_error( new WP_Error( 'jetpack-memberships-rb-npf-we', __( 'Encountered an error when getting the plan associated with this button:', 'jetpack' ) . ' ' . $product->get_error_message() . '. ' . __( ' Edit this post and confirm that the selected payment plan still exists and is available for purchase.', 'jetpack' ) ) );
			}
			if ( $product->post_type !== self::$post_type_plan ) {
				return $this->render_button_error( new WP_Error( 'jetpack-memberships-rb-pnplan', __( 'The payment plan selected is not actually a payment plan.', 'jetpack' ) . ' ' . __( 'Edit this post and confirm that the selected payment plan still exists and is available for purchase.', 'jetpack' ) ) );
			}
			if ( 'publish' !== $product->post_status ) {
				return $this->render_button_error( new WP_Error( 'jetpack-memberships-rb-psnpub', __( 'The selected payment plan is not active.', 'jetpack' ) . ' ' . __( 'Edit this post and confirm that the selected payment plan still exists and is available for purchase.', 'jetpack' ) ) );
			}
			$valid_plans[] = $plan_id;
		}

		// If none are valid, return.
		// (Returning like this makes the button disappear.)
		if ( empty( $valid_plans ) ) {
			return;
		}
		$plan_id = implode( '+', $valid_plans );

		if ( ! empty( $content ) ) {
			$block_id      = esc_attr( wp_unique_id( 'recurring-payments-block-' ) );
			$content       = str_replace( 'recurring-payments-id', $block_id, $content );
			$content       = str_replace( 'wp-block-jetpack-recurring-payments', 'wp-block-jetpack-recurring-payments wp-block-button', $content );
			$subscribe_url = $this->get_subscription_url( $plan_id );
			return preg_replace( '/(href=".*")/U', 'href="' . $subscribe_url . '"', $content );
		}

		return $this->deprecated_render_button_v1( $attributes, $plan_id );
	}

	/**
	 * Builds subscription URL for this membership using the current blog and
	 * supplied plan IDs.
	 *
	 * @param integer $plan_id - Unique ID for the plan being subscribed to.
	 * @return string
	 */
	public function get_subscription_url( $plan_id ) {
		global $wp;

		return add_query_arg(
			array(
				'blog'     => esc_attr( self::get_blog_id() ),
				'plan'     => esc_attr( $plan_id ),
				'lang'     => esc_attr( get_locale() ),
				'pid'      => esc_attr( get_the_ID() ), // Needed for analytics purposes.
				'redirect' => esc_attr( rawurlencode( home_url( $wp->request ) ) ), // Needed for redirect back in case of redirect-based flow.
			),
			'https://subscribe.wordpress.com/memberships/'
		);
	}

	/**
	 * Renders a deprecated legacy version of the button HTML.
	 *
	 * @param array   $attrs - Array containing the Recurring Payment block attributes.
	 * @param integer $plan_id - Unique plan ID the membership is for.
	 *
	 * @return string
	 */
	public function deprecated_render_button_v1( $attrs, $plan_id ) {
		$button_label = isset( $attrs['submitButtonText'] )
			? $attrs['submitButtonText']
			: __( 'Your contribution', 'jetpack' );

		$button_styles = array();
		if ( ! empty( $attrs['customBackgroundButtonColor'] ) ) {
			array_push(
				$button_styles,
				sprintf(
					'background-color: %s',
					sanitize_hex_color( $attrs['customBackgroundButtonColor'] )
				)
			);
		}
		if ( ! empty( $attrs['customTextButtonColor'] ) ) {
			array_push(
				$button_styles,
				sprintf(
					'color: %s',
					sanitize_hex_color( $attrs['customTextButtonColor'] )
				)
			);
		}
		$button_styles = implode( ';', $button_styles );

		return sprintf(
			'<div class="%1$s"><a role="button" href="%2$s" class="%3$s" style="%4$s">%5$s</a></div>',
			esc_attr(
				Blocks::classes(
					self::$button_block_name,
					$attrs,
					array( 'wp-block-button' )
				)
			),
			esc_url( $this->get_subscription_url( $plan_id ) ),
			isset( $attrs['submitButtonClasses'] ) ? esc_attr( $attrs['submitButtonClasses'] ) : 'wp-block-button__link',
			esc_attr( $button_styles ),
			wp_kses( $button_label, self::$tags_allowed_in_the_button )
		);
	}

	/**
	 * Get current blog id.
	 *
	 * @return int
	 */
	public static function get_blog_id() {
		if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {
			return get_current_blog_id();
		}

		return Jetpack_Options::get_option( 'id' );
	}

	/**
	 * Get the id of the connected payment acount (Stripe etc).
	 *
	 * @return bool
	 */
	public static function has_connected_account() {

		// This is the primary solution.
		$has_option = get_option( self::$has_connected_account_option_name, false ) ? true : false;
		if ( $has_option ) {
			return true;
		}

		return false;
	}

	/**
	 * Get the post access level
	 *
	 * If no ID is provided, the method tries to get it from the global post object.
	 *
	 * @param int|null $post_id The ID of the post. Default is null.
	 *
	 * @return string the actual post access level (see projects/plugins/jetpack/extensions/blocks/subscriptions/constants.js for the values).
	 */
	public static function get_post_access_level( $post_id = null ) {
		if ( ! $post_id ) {
			$post_id = get_the_ID();
		}
		if ( ! $post_id ) {
			return Abstract_Token_Subscription_Service::POST_ACCESS_LEVEL_EVERYBODY;
		}

		$post_access_level = get_post_meta( $post_id, self::$post_access_level_meta_name, true );
		if ( empty( $post_access_level ) ) {
			$post_access_level = Abstract_Token_Subscription_Service::POST_ACCESS_LEVEL_EVERYBODY;
		}
		return $post_access_level;
	}

	/**
	 * Get the post tier plan
	 *
	 * If no ID is provided, the method tries to get it from the global post object.
	 *
	 * @param int|null $post_id The ID of the post. Default is null.
	 *
	 * @return WP_Post|null the actual post tier.
	 */
	public static function get_post_tier( $post_id = null ) {
		if ( ! $post_id ) {
			$post_id = get_the_ID();
		}

		if ( ! $post_id ) {
			return null;
		}

		$post_tier_id = get_post_meta( $post_id, self::$post_access_tier_meta_name, true );
		if ( empty( $post_tier_id ) ) {
			return null;
		}

		return get_post( $post_tier_id );
	}

	/**
	 * Determines whether the current user can edit.
	 *
	 * @return bool Whether the user can edit.
	 */
	public static function user_can_edit() {
		$user = wp_get_current_user();
		// phpcs:ignore ImportDetection.Imports.RequireImports.Symbol
		return 0 !== $user->ID && current_user_can( 'edit_post', get_the_ID() );
	}

	/**
	 * Determines whether the current user is a paid subscriber and caches the result.
	 *
	 * @return bool Whether the post can be viewed
	 */
	public static function user_is_paid_subscriber() {
		$user_id = get_current_user_id();

		require_once JETPACK__PLUGIN_DIR . 'extensions/blocks/premium-content/_inc/subscription-service/include.php';
		$paywall            = \Automattic\Jetpack\Extensions\Premium_Content\subscription_service();
		$is_paid_subscriber = $paywall->visitor_can_view_content( self::get_all_newsletter_plan_ids(), Abstract_Token_Subscription_Service::POST_ACCESS_LEVEL_PAID_SUBSCRIBERS_ALL_TIERS );

		self::$user_is_paid_subscriber_cache[ $user_id ] = $is_paid_subscriber;
		return $is_paid_subscriber;
	}

	/**
	 * Determines whether the current user has a pending subscription.
	 *
	 * @return bool Whether the user has a pending subscription
	 */
	public static function user_is_pending_subscriber() {
		require_once JETPACK__PLUGIN_DIR . 'extensions/blocks/premium-content/_inc/subscription-service/include.php';
		$subscription_service = \Automattic\Jetpack\Extensions\Premium_Content\subscription_service();
		return $subscription_service->is_current_user_pending_subscriber();
	}

	/**
	 * Determines whether the current user can view the post based on the newsletter access level
	 * and caches the result.
	 *
	 * @param int|null $post_id Explicit post id to check against.
	 *
	 * @return bool Whether the post can be viewed
	 */
	public static function user_can_view_post( $post_id = null ) {
		$user_id = get_current_user_id();
		if ( null === $post_id ) {
			$post_id = get_the_ID();
		}

		if ( false === $post_id ) {
			$post_id = 0;
		}

		$cache_key = sprintf( '%d_%d', $user_id, $post_id );
		if ( $user_id !== 0 && isset( self::$user_can_view_post_cache[ $cache_key ] ) ) {
			return self::$user_can_view_post_cache[ $cache_key ];
		}

		$post_access_level = self::get_post_access_level( $post_id );
		if ( Abstract_Token_Subscription_Service::POST_ACCESS_LEVEL_EVERYBODY === $post_access_level ) {
			self::$user_can_view_post_cache[ $cache_key ] = true;
			return true;
		}

		if ( $user_id === 0 ) {
			if ( defined( 'WPCOM_SENDING_POST_TO_SUBSCRIBERS' ) && WPCOM_SENDING_POST_TO_SUBSCRIBERS ) {
				if ( Abstract_Token_Subscription_Service::POST_ACCESS_LEVEL_SUBSCRIBERS === $post_access_level ) {
					return true;
				}
			}
		}

		require_once JETPACK__PLUGIN_DIR . 'extensions/blocks/premium-content/_inc/subscription-service/include.php';
		$paywall = \Automattic\Jetpack\Extensions\Premium_Content\subscription_service();

		$all_newsletters_plan_ids = self::get_all_newsletter_plan_ids();

		if ( 0 === count( $all_newsletters_plan_ids ) &&
			Abstract_Token_Subscription_Service::POST_ACCESS_LEVEL_PAID_SUBSCRIBERS === $post_access_level ||
			Abstract_Token_Subscription_Service::POST_ACCESS_LEVEL_PAID_SUBSCRIBERS_ALL_TIERS === $post_access_level
		) {
			// The post is paywalled but there is no newsletter plans on the site.
			// We downgrade the post level to subscribers-only
			$post_access_level = Abstract_Token_Subscription_Service::POST_ACCESS_LEVEL_SUBSCRIBERS;
		}

		$can_view_post = $paywall->visitor_can_view_content( $all_newsletters_plan_ids, $post_access_level );

		self::$user_can_view_post_cache[ $cache_key ] = $can_view_post;
		return $can_view_post;
	}

	/**
	 * Whether Recurring Payments are enabled. True if the block
	 * is supported by the site's plan, or if it is a Jetpack site
	 * and the feature to enable upgrade nudges is active.
	 *
	 * @return bool
	 */
	public static function is_enabled_jetpack_recurring_payments() {
		$api_available = ( ( defined( 'IS_WPCOM' ) && IS_WPCOM ) || Jetpack::is_connection_ready() );
		return $api_available;
	}

	/**
	 * Whether site has any paid plan.
	 *
	 * @param string $type - Type of a plan for which site is configured. For now supports empty and newsletter.
	 *
	 * @return bool
	 */
	public static function has_configured_plans_jetpack_recurring_payments( $type = '' ) {
		if ( ! self::is_enabled_jetpack_recurring_payments() ) {
			return false;
		}
		$query = array(
			'post_type'      => self::$post_type_plan,
			'posts_per_page' => 1,
		);

		// We want to see if user has any plan marked as a newsletter set up.
		if ( 'newsletter' === $type ) {
			$query['meta_key']   = 'jetpack_memberships_site_subscriber';
			$query['meta_value'] = true;
		}

		$plans = get_posts( $query );
		return ( is_countable( $plans ) && count( $plans ) > 0 );
	}

	/**
	 * Return the list of plan posts
	 *
	 * @return WP_Post[]|WP_Error
	 */
	public static function get_all_plans() {
		if ( ! self::is_enabled_jetpack_recurring_payments() ) {
			return array();
		}

		// We can retrieve the data directly except on a Jetpack/Atomic cached site or
		$is_cached_site = ( new Host() )->is_wpcom_simple() && is_jetpack_site();
		if ( ! $is_cached_site ) {
			return get_posts(
				array(
					'posts_per_page' => -1,
					'post_type'      => self::$post_type_plan,
				)
			);
		} else {
			// On cached site on WPCOM
			require_lib( 'memberships' );
			return Memberships_Product::get_plans_posts_list( get_current_blog_id() );
		}
	}

	/**
	 * Return all membership plans ids (deleted or not)
	 * This function is used both on WPCOM or on Jetpack self-hosted.
	 * Depending on the environment we need to mitigate where the data is retrieved from.
	 *
	 * @return array
	 */
	public static function get_all_newsletter_plan_ids() {

		if ( ! self::is_enabled_jetpack_recurring_payments() ) {
			return array();
		}

		// We can retrieve the data directly except on a Jetpack/Atomic cached site or
		$is_cached_site = ( new Host() )->is_wpcom_simple() && is_jetpack_site();
		if ( ! $is_cached_site ) {
			return get_posts(
				array(
					'posts_per_page' => -1,
					'fields'         => 'ids',
					'post_type'      => self::$post_type_plan,
					'meta_key'       => 'jetpack_memberships_type',
					'meta_value'     => self::$type_tier,
				)
			);

		} else {
			// On cached site on WPCOM
			require_lib( 'memberships' );
			$allow_deleted = true;
			$list          = Memberships_Product::get_product_list( get_current_blog_id(), self::$type_tier, null, $allow_deleted );

			if ( is_wp_error( $list ) ) {
				return array();
			}

			return array_map(
				function ( $product ) {
					return $product['id'];
				}, // Returning only post ids
				$list
			);
		}
	}

	/**
	 * Register the Recurring Payments Gutenberg block
	 */
	public function register_gutenberg_block() {
		// This gate was introduced to prevent duplicate registration. A race condition exists where
		// the registration that happens via extensions/blocks/recurring-payments/recurring-payments.php
		// was adding the registration action after the action had been run in some contexts.
		if ( self::$has_registered_block ) {
			return;
		}

		if ( self::is_enabled_jetpack_recurring_payments() ) {
			Blocks::jetpack_register_block(
				'jetpack/recurring-payments',
				array(
					'render_callback'  => array( $this, 'render_button' ),
					'uses_context'     => array( 'isPremiumContentChild' ),
					'provides_context' => array(
						'jetpack/parentBlockWidth' => 'width',
					),
				)
			);
		} else {
			Jetpack_Gutenberg::set_extension_unavailable(
				'jetpack/recurring-payments',
				'missing_plan',
				array(
					'required_feature' => 'memberships',
					'required_plan'    => self::$required_plan,
				)
			);
		}

		self::$has_registered_block = true;
	}

	/**
	 * Transforms a number into it's short human-readable version.
	 *
	 * @param int $subscribers_total The extrapolated excerpt string.
	 *
	 * @return string Human-readable version of the number. ie. 1.9 M.
	 */
	public static function get_join_others_text( $subscribers_total ) {
		if ( $subscribers_total >= 1000000 ) {
			/* translators: %s: number of folks following the blog, millions(M) with one decimal. i.e. 1.1 */
			return sprintf( __( 'Join %sM other subscribers', 'jetpack' ), floatval( number_format_i18n( $subscribers_total / 1000000, 1 ) ) );
		}
		if ( $subscribers_total >= 10000 ) {
			/* translators: %s: number of folks following the blog, thousands(K) with one decimal. i.e. 1.1 */
			return sprintf( __( 'Join %sK other subscribers', 'jetpack' ), floatval( number_format_i18n( $subscribers_total / 1000, 1 ) ) );
		}

		/* translators: %s: number of folks following the blog */
		return sprintf( _n( 'Join %s other subscriber', 'Join %s other subscribers', $subscribers_total, 'jetpack' ), number_format_i18n( $subscribers_total ) );
	}

	/**
	 * Returns the email of the current user.
	 *
	 * @return string
	 */
	public static function get_current_user_email() {
		require_once JETPACK__PLUGIN_DIR . 'extensions/blocks/premium-content/_inc/subscription-service/include.php';
		$subscription_service = \Automattic\Jetpack\Extensions\Premium_Content\subscription_service();
		return $subscription_service->get_subscriber_email();
	}

	/**
	 * Returns if the current user is subscribed or not.
	 *
	 * @return boolean
	 */
	public static function is_current_user_subscribed() {
		require_once JETPACK__PLUGIN_DIR . 'extensions/blocks/premium-content/_inc/subscription-service/include.php';
		$subscription_service = \Automattic\Jetpack\Extensions\Premium_Content\subscription_service();
		return $subscription_service->is_current_user_subscribed();
	}
}
Jetpack_Memberships::get_instance();
