e saved when calling ::add_nonce.
	 *
	 * @todo Properly prepare the query before executing it.
	 *
	 * @param bool $all whether to clean even non-expired nonces.
	 *
	 * @deprecated since 1.24.0
	 * @see Nonce_Handler::clean_all()
	 */
	public function clean_nonces( $all = false ) {
		_deprecated_function( __METHOD__, '1.24.0', 'Automattic\\Jetpack\\Connection\\Nonce_Handler::clean_all' );
		( new Nonce_Handler() )->clean_all( $all ? PHP_INT_MAX : ( time() - Nonce_Handler::LIFETIME ) );
	}

	/**
	 * Sets the Connection custom capabilities.
	 *
	 * @param string[] $caps    Array of the user's capabilities.
	 * @param string   $cap     Capability name.
	 * @param int      $user_id The user ID.
	 * @param array    $args    Adds the context to the cap. Typically the object ID.
	 */
	public function jetpack_connection_custom_caps( $caps, $cap, $user_id, $args ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
		switch ( $cap ) {
			case 'jetpack_connect':
			case 'jetpack_reconnect':
				$is_offline_mode = ( new Status() )->is_offline_mode();
				if ( $is_offline_mode ) {
					$caps = array( 'do_not_allow' );
					break;
				}
				// Pass through. If it's not offline mode, these should match disconnect.
				// Let users disconnect if it's offline mode, just in case things glitch.
			case 'jetpack_disconnect':
				/**
				 * Filters the jetpack_disconnect capability.
				 *
				 * @since 1.14.2
				 *
				 * @param array An array containing the capability name.
				 */
				$caps = apply_filters( 'jetpack_disconnect_cap', array( 'manage_options' ) );
				break;
			case 'jetpack_connect_user':
				$is_offline_mode = ( new Status() )->is_offline_mode();
				if ( $is_offline_mode ) {
					$caps = array( 'do_not_allow' );
					break;
				}
				// With site connections in mind, non-admin users can connect their account only if a connection owner exists.
				$caps = $this->has_connected_owner() ? array( 'read' ) : array( 'manage_options' );
				break;
		}
		return $caps;
	}

	/**
	 * Builds the timeout limit for queries talking with the wpcom servers.
	 *
	 * Based on local php max_execution_time in php.ini
	 *
	 * @since 1.7.0
	 * @since-jetpack 5.4.0
	 * @return int
	 **/
	public function get_max_execution_time() {
		$timeout = (int) ini_get( 'max_execution_time' );

		// Ensure exec time set in php.ini.
		if ( ! $timeout ) {
			$timeout = 30;
		}
		return $timeout;
	}

	/**
	 * Sets a minimum request timeout, and returns the current timeout
	 *
	 * @since 1.7.0
	 * @since-jetpack 5.4.0
	 * @param Integer $min_timeout the minimum timeout value.
	 **/
	public function set_min_time_limit( $min_timeout ) {
		$timeout = $this->get_max_execution_time();
		if ( $timeout < $min_timeout ) {
			$timeout = $min_timeout;
			set_time_limit( $timeout );
		}
		return $timeout;
	}

	/**
	 * Get our assumed site creation date.
	 * Calculated based on the earlier date of either:
	 * - Earliest admin user registration date.
	 * - Earliest date of post of any post type.
	 *
	 * @since 1.7.0
	 * @since-jetpack 7.2.0
	 *
	 * @return string Assumed site creation date and time.
	 */
	public function get_assumed_site_creation_date() {
		$cached_date = get_transient( 'jetpack_assumed_site_creation_date' );
		if ( ! empty( $cached_date ) ) {
			return $cached_date;
		}

		$earliest_registered_users  = get_users(
			array(
				'role'    => 'administrator',
				'orderby' => 'user_registered',
				'order'   => 'ASC',
				'fields'  => array( 'user_registered' ),
				'number'  => 1,
			)
		);
		$earliest_registration_date = $earliest_registered_users[0]->user_registered;

		$earliest_posts = get_posts(
			array(
				'posts_per_page' => 1,
				'post_type'      => 'any',
				'post_status'    => 'any',
				'orderby'        => 'date',
				'order'          => 'ASC',
			)
		);

		// If there are no posts at all, we'll count only on user registration date.
		if ( $earliest_posts ) {
			$earliest_post_date = $earliest_posts[0]->post_date;
		} else {
			$earliest_post_date = PHP_INT_MAX;
		}

		$assumed_date = min( $earliest_registration_date, $earliest_post_date );
		set_transient( 'jetpack_assumed_site_creation_date', $assumed_date );

		return $assumed_date;
	}

	/**
	 * Adds the activation source string as a parameter to passed arguments.
	 *
	 * @todo Refactor to use rawurlencode() instead of urlencode().
	 *
	 * @param array $args arguments that need to have the source added.
	 * @return array $amended arguments.
	 */
	public static function apply_activation_source_to_args( $args ) {
		list( $activation_source_name, $activation_source_keyword ) = get_option( 'jetpack_activation_source' );

		if ( $activation_source_name ) {
			// phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.urlencode_urlencode
			$args['_as'] = urlencode( $activation_source_name );
		}

		if ( $activation_source_keyword ) {
			// phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.urlencode_urlencode
			$args['_ak'] = urlencode( $activation_source_keyword );
		}

		return $args;
	}

	/**
	 * Generates two secret tokens and the end of life timestamp for them.
	 *
	 * @param String  $action  The action name.
	 * @param Integer $user_id The user identifier.
	 * @param Integer $exp     Expiration time in seconds.
	 */
	public function generate_secrets( $action, $user_id = false, $exp = 600 ) {
		return ( new Secrets() )->generate( $action, $user_id, $exp );
	}

	/**
	 * Returns two secret tokens and the end of life timestamp for them.
	 *
	 * @deprecated 1.24.0 Use Automattic\Jetpack\Connection\Secrets->get() instead.
	 *
	 * @param String  $action  The action name.
	 * @param Integer $user_id The user identifier.
	 * @return string|array an array of secrets or an error string.
	 */
	public function get_secrets( $action, $user_id ) {
		_deprecated_function( __METHOD__, '1.24.0', 'Automattic\\Jetpack\\Connection\\Secrets->get' );
		return ( new Secrets() )->get( $action, $user_id );
	}

	/**
	 * Deletes secret tokens in case they, for example, have expired.
	 *
	 * @deprecated 1.24.0 Use Automattic\Jetpack\Connection\Secrets->delete() instead.
	 *
	 * @param String  $action  The action name.
	 * @param Integer $user_id The user identifier.
	 */
	public function delete_secrets( $action, $user_id ) {
		_deprecated_function( __METHOD__, '1.24.0', 'Automattic\\Jetpack\\Connection\\Secrets->delete' );
		( new Secrets() )->delete( $action, $user_id );
	}

	/**
	 * Deletes all connection tokens and transients from the local Jetpack site.
	 * If the plugin object has been provided in the constructor, the function first checks
	 * whether it's the only active connection.
	 * If there are any other connections, the function will do nothing and return `false`
	 * (unless `$ignore_connected_plugins` is set to `true`).
	 *
	 * @param bool $ignore_connected_plugins Delete the tokens even if there are other connected plugins.
	 *
	 * @return bool True if disconnected successfully, false otherwise.
	 */
	public function delete_all_connection_tokens( $ignore_connected_plugins = false ) {
		// refuse to delete if we're not the last Jetpack plugin installed.
		if ( ! $ignore_connected_plugins && null !== $this->plugin && ! $this->plugin->is_only() ) {
			return false;
		}

		/**
		 * Fires upon the disconnect attempt.
		 * Return `false` to prevent the disconnect.
		 *
		 * @since 1.14.2
		 */
		if ( ! apply_filters( 'jetpack_connection_delete_all_tokens', true ) ) {
			return false;
		}

		\Jetpack_Options::delete_option(
			array(
				'master_user',
				'time_diff',
				'fallback_no_verify_ssl_certs',
			)
		);

		( new Secrets() )->delete_all();
		$this->get_tokens()->delete_all();

		// Delete cached connected user data.
		$transient_key = 'jetpack_connected_user_data_' . get_current_user_id();
		delete_transient( $transient_key );

		// Delete all XML-RPC errors.
		Error_Handler::get_instance()->delete_all_errors();

		return true;
	}

	/**
	 * Tells WordPress.com to disconnect the site and clear all tokens from cached site.
	 * If the plugin object has been provided in the constructor, the function first check
	 * whether it's the only active connection.
	 * If there are any other connections, the function will do nothing and return `false`
	 * (unless `$ignore_connected_plugins` is set to `true`).
	 *
	 * @param bool $ignore_connected_plugins Delete the tokens even if there are other connected plugins.
	 *
	 * @return bool True if disconnected successfully, false otherwise.
	 */
	public function disconnect_site_wpcom( $ignore_connected_plugins = false ) {
		if ( ! $ignore_connected_plugins && null !== $this->plugin && ! $this->plugin->is_only() ) {
			return false;
		}

		if ( ( new Status() )->is_offline_mode() && ! apply_filters( 'jetpack_connection_disconnect_site_wpcom_offline_mode', false ) ) {
			// Prevent potential disconnect of the live site by removing WPCOM tokens.
			return false;
		}

		/**
		 * Fires upon the disconnect attempt.
		 * Return `false` to prevent the disconnect.
		 *
		 * @since 1.14.2
		 */
		if ( ! apply_filters( 'jetpack_connection_disconnect_site_wpcom', true, $this ) ) {
			return false;
		}

		$xml = new Jetpack_IXR_Client();
		$xml->query( 'jetpack.deregister', get_current_user_id() );

		return true;
	}

	/**
	 * Disconnect the plugin and remove the tokens.
	 * This function will automatically perform "soft" or "hard" disconnect depending on whether other plugins are using the connection.
	 * This is a proxy method to simplify the Connection package API.
	 *
	 * @see Manager::disconnect_site()
	 *
	 * @param boolean $disconnect_wpcom Should disconnect_site_wpcom be called.
	 * @param bool    $ignore_connected_plugins Delete the tokens even if there are other connected plugins.
	 * @return bool
	 */
	public function remove_connection( $disconnect_wpcom = true, $ignore_connected_plugins = false ) {

		$this->disconnect_site( $disconnect_wpcom, $ignore_connected_plugins );

		return true;
	}

	/**
	 * Completely clearing up the connection, and initiating reconnect.
	 *
	 * @return true|WP_Error True if reconnected successfully, a `WP_Error` object otherwise.
	 */
	public function reconnect() {
		( new Tracking() )->record_user_event( 'restore_connection_reconnect' );

		$this->disconnect_site_wpcom( true );

		return $this->register();
	}

	/**
	 * Validate the tokens, and refresh the invalid ones.
	 *
	 * @return string|bool|WP_Error True if connection restored or string indicating what's to be done next. A `WP_Error` object or false otherwise.
	 */
	public function restore() {
		// If this is a site connection we need to trigger a full reconnection as our only secure means of
		// communication with WPCOM, aka the blog token, is compromised.
		if ( $this->is_site_connection() ) {
			return $this->reconnect();
		}

		$validate_tokens_response = $this->get_tokens()->validate();

		// If token validation failed, trigger a full reconnection.
		if ( is_array( $validate_tokens_response ) &&
			isset( $validate_tokens_response['blog_token']['is_healthy'] ) &&
			isset( $validate_tokens_response['user_token']['is_healthy'] ) ) {
			$blog_token_healthy = $validate_tokens_response['blog_token']['is_healthy'];
			$user_token_healthy = $validate_tokens_response['user_token']['is_healthy'];
		} else {
			$blog_token_healthy = false;
			$user_token_healthy = false;
		}

		// Tokens are both valid, or both invalid. We can't fix the problem we don't see, so the full reconnection is needed.
		if ( $blog_token_healthy === $user_token_healthy ) {
			$result = $this->reconnect();
			return ( true === $result ) ? 'authorize' : $result;
		}

		if ( ! $blog_token_healthy ) {
			return $this->refresh_blog_token();
		}

		if ( ! $user_token_healthy ) {
			return ( true === $this->refresh_user_token() ) ? 'authorize' : false;
		}

		return false;
	}

	/**
	 * Responds to a WordPress.com call to register the current site.
	 * Should be changed to protected.
	 *
	 * @param array $registration_data Array of [ secret_1, user_id ].
	 */
	public function handle_registration( array $registration_data ) {
		list( $registration_secret_1, $registration_user_id ) = $registration_data;
		if ( empty( $registration_user_id ) ) {
			return new \WP_Error( 'registration_state_invalid', __( 'Invalid Registration State', 'jetpack-connection' ), 400 );
		}

		return ( new Secrets() )->verify( 'register', $registration_secret_1, (int) $registration_user_id );
	}

	/**
	 * Perform the API request to validate the blog and user tokens.
	 *
	 * @deprecated 1.24.0 Use Automattic\Jetpack\Connection\Tokens->validate_tokens() instead.
	 *
	 * @param int|null $user_id ID of the user we need to validate token for. Current user's ID by default.
	 *
	 * @return array|false|WP_Error The API response: `array( 'blog_token_is_healthy' => true|false, 'user_token_is_healthy' => true|false )`.
	 */
	public function validate_tokens( $user_id = null ) {
		_deprecated_function( __METHOD__, '1.24.0', 'Automattic\\Jetpack\\Connection\\Tokens->validate' );
		return $this->get_tokens()->validate( $user_id );
	}

	/**
	 * Verify a Previously Generated Secret.
	 *
	 * @deprecated 1.24.0 Use Automattic\Jetpack\Connection\Secrets->verify() instead.
	 *
	 * @param string $action   The type of secret to verify.
	 * @param string $secret_1 The secret string to compare to what is stored.
	 * @param int    $user_id  The user ID of the owner of the secret.
	 * @return \WP_Error|string WP_Error on failure, secret_2 on success.
	 */
	public function verify_secrets( $action, $secret_1, $user_id ) {
		_deprecated_function( __METHOD__, '1.24.0', 'Automattic\\Jetpack\\Connection\\Secrets->verify' );
		return ( new Secrets() )->verify( $action, $secret_1, $user_id );
	}

	/**
	 * Responds to a WordPress.com call to authorize the current user.
	 * Should be changed to protected.
	 */
	public function handle_authorization() {
	}

	/**
	 * Obtains the auth token.
	 *
	 * @param array $data The request data.
	 * @return object|\WP_Error Returns the auth token on success.
	 *                          Returns a \WP_Error on failure.
	 */
	public function get_token( $data ) {
		return $this->get_tokens()->get( $data, $this->api_url( 'token' ) );
	}

	/**
	 * Builds a URL to the Jetpack connection auth page.
	 *
	 * @since 2.7.6 Added optional $from and $raw parameters.
	 *
	 * @param WP_User|null $user     (optional) defaults to the current logged in user.
	 * @param string|null  $redirect (optional) a redirect URL to use instead of the default.
	 * @param bool|string  $from     If not false, adds 'from=$from' param to the connect URL.
	 * @param bool         $raw If true, URL will not be escaped.
	 *
	 * @return string Connect URL.
	 */
	public function get_authorization_url( $user = null, $redirect = null, $from = false, $raw = false ) {
		if ( empty( $user ) ) {
			$user = wp_get_current_user();
		}

		$roles       = new Roles();
		$role        = $roles->translate_user_to_role( $user );
		$signed_role = $this->get_tokens()->sign_role( $role );

		/**
		 * Filter the URL of the first time the user gets redirected back to your site for connection
		 * data processing.
		 *
		 * @since 1.7.0
		 * @since-jetpack 8.0.0
		 *
		 * @param string $redirect_url Defaults to the site admin URL.
		 */
		$processing_url = apply_filters( 'jetpack_connect_processing_url', admin_url( 'admin.php' ) );

		/**
		 * Filter the URL to redirect the user back to when the authorization process
		 * is complete.
		 *
		 * @since 1.7.0
		 * @since-jetpack 8.0.0
		 *
		 * @param string $redirect_url Defaults to the site URL.
		 */
		$redirect = apply_filters( 'jetpack_connect_redirect_url', $redirect );

		$secrets = ( new Secrets() )->generate( 'authorize', $user->ID, 2 * HOUR_IN_SECONDS );

		/**
		 * Filter the type of authorization.
		 * 'calypso' completes authorization on wordpress.com/jetpack/connect
		 * while 'jetpack' ( or any other value ) completes the authorization at jetpack.wordpress.com.
		 *
		 * @since 1.7.0
		 * @since-jetpack 4.3.3
		 *
		 * @param string $auth_type Defaults to 'calypso', can also be 'jetpack'.
		 */
		$auth_type = apply_filters( 'jetpack_auth_type', 'calypso' );

		/**
		 * Filters the user connection request data for additional property addition.
		 *
		 * @since 1.7.0
		 * @since-jetpack 8.0.0
		 *
		 * @param array $request_data request data.
		 */
		$body = apply_filters(
			'jetpack_connect_request_body',
			array(
				'response_type'         => 'code',
				'client_id'             => \Jetpack_Options::get_option( 'id' ),
				'redirect_uri'          => add_query_arg(
					array(
						'handler'  => 'jetpack-connection-webhooks',
						'action'   => 'authorize',
						'_wpnonce' => wp_create_nonce( "jetpack-authorize_{$role}_{$redirect}" ),
						'redirect' => $redirect ? rawurlencode( $redirect ) : false,
					),
					esc_url( $processing_url )
				),
				'state'                 => $user->ID,
				'scope'                 => $signed_role,
				'user_email'            => $user->user_email,
				'user_login'            => $user->user_login,
				'is_active'             => $this->has_connected_owner(), // TODO Deprecate this.
				'jp_version'            => (string) Constants::get_constant( 'JETPACK__VERSION' ),
				'auth_type'             => $auth_type,
				'secret'                => $secrets['secret_1'],
				'blogname'              => get_option( 'blogname' ),
				'site_url'              => Urls::site_url(),
				'home_url'              => Urls::home_url(),
				'site_icon'             => get_site_icon_url(),
				'site_lang'             => get_locale(),
				'site_created'          => $this->get_assumed_site_creation_date(),
				'allow_site_connection' => ! $this->has_connected_owner(),
				'calypso_env'           => ( new Host() )->get_calypso_env(),
				'source'                => ( new Host() )->get_source_query(),
			)
		);

		$body = static::apply_activation_source_to_args( urlencode_deep( $body ) );

		$api_url = $this->api_url( 'authorize' );

		$url = add_query_arg( $body, $api_url );

		if ( is_network_admin() ) {
			$url = add_query_arg( 'is_multisite', network_admin_url( 'admin.php?page=jetpack-settings' ), $url );
		}

		if ( $from ) {
			$url = add_query_arg( 'from', $from, $url );
		}

		if ( $raw ) {
			$url = esc_url_raw( $url );
		}

		/**
		 * Filter the URL used when connecting a user to a WordPress.com account.
		 *
		 * @since 2.0.0
		 * @since 2.7.6 Added $raw parameter.
		 *
		 * @param string $url Connection URL.
		 * @param bool   $raw If true, URL will not be escaped.
		 */
		return apply_filters( 'jetpack_build_authorize_url', $url, $raw );
	}

	/**
	 * Authorizes the user by obtaining and storing the user token.
	 *
	 * @param array $data The request data.
	 * @return string|\WP_Error Returns a string on success.
	 *                          Returns a \WP_Error on failure.
	 */
	public function authorize( $data = array() ) {
		/**
		 * Action fired when user authorization starts.
		 *
		 * @since 1.7.0
		 * @since-jetpack 8.0.0
		 */
		do_action( 'jetpack_authorize_starting' );

		$roles = new Roles();
		$role  = $roles->translate_current_user_to_role();

		if ( ! $role ) {
			return new \WP_Error( 'no_role', 'Invalid request.', 400 );
		}

		$cap = $roles->translate_role_to_cap( $role );
		if ( ! $cap ) {
			return new \WP_Error( 'no_cap', 'Invalid request.', 400 );
		}

		if ( ! empty( $data['error'] ) ) {
			return new \WP_Error( $data['error'], 'Error included in the request.', 400 );
		}

		if ( ! isset( $data['state'] ) ) {
			return new \WP_Error( 'no_state', 'Request must include state.', 400 );
		}

		if ( ! ctype_digit( $data['state'] ) ) {
			return new \WP_Error( $data['error'], 'State must be an integer.', 400 );
		}

		$current_user_id = get_current_user_id();
		if ( $current_user_id !== (int) $data['state'] ) {
			return new \WP_Error( 'wrong_state', 'State does not match current user.', 400 );
		}

		if ( empty( $data['code'] ) ) {
			return new \WP_Error( 'no_code', 'Request must include an authorization code.', 400 );
		}

		$token = $this->get_tokens()->get( $data, $this->api_url( 'token' ) );

		if ( is_wp_error( $token ) ) {
			$code = $token->get_error_code();
			if ( empty( $code ) ) {
				$code = 'invalid_token';
			}
			return new \WP_Error( $code, $token->get_error_message(), 400 );
		}

		if ( ! $token ) {
			return new \WP_Error( 'no_token', 'Error generating token.', 400 );
		}

		$is_connection_owner = ! $this->has_connected_owner();

		$this->get_tokens()->update_user_token( $current_user_id, sprintf( '%s.%d', $token, $current_user_id ), $is_connection_owner );

		/**
		 * Fires after user has successfully received an auth token.
		 *
		 * @since 1.7.0
		 * @since-jetpack 3.9.0
		 */
		do_action( 'jetpack_user_authorized' );

		if ( ! $is_connection_owner ) {
			/**
			 * Action fired when a secondary user has been authorized.
			 *
			 * @since 1.7.0
			 * @since-jetpack 8.0.0
			 */
			do_action( 'jetpack_authorize_ending_linked' );
			return 'linked';
		}

		/**
		 * Action fired when the master user has been authorized.
		 *
		 * @since 1.7.0
		 * @since-jetpack 8.0.0
		 *
		 * @param array $data The request data.
		 */
		do_action( 'jetpack_authorize_ending_authorized', $data );

		\Jetpack_Options::delete_raw_option( 'jetpack_last_connect_url_check' );

		( new Nonce_Handler() )->reschedule();

		return 'authorized';
	}

	/**
	 * Disconnects from the Jetpack servers.
	 * Forgets all connection details and tells the Jetpack servers to do the same.
	 *
	 * @param boolean $disconnect_wpcom Should disconnect_site_wpcom be called.
	 * @param bool    $ignore_connected_plugins Delete the tokens even if there are other connected plugins.
	 */
	public function disconnect_site( $disconnect_wpcom = true, $ignore_connected_plugins = true ) {
		if ( ! $ignore_connected_plugins && null !== $this->plugin && ! $this->plugin->is_only() ) {
			return false;
		}

		wp_clear_scheduled_hook( 'jetpack_clean_nonces' );

		( new Nonce_Handler() )->clean_all();

		/**
		 * Fires when a site is disconnected.
		 *
		 * @since 1.36.3
		 */
		do_action( 'jetpack_site_before_disconnected' );

		// If the site is in an IDC because sync is not allowed,
		// let's make sure to not disconnect the production site.
		if ( $disconnect_wpcom ) {
			$tracking = new Tracking();
			$tracking->record_user_event( 'disconnect_site', array() );

			$this->disconnect_site_wpcom( $ignore_connected_plugins );
		}

		$this->delete_all_connection_tokens( $ignore_connected_plugins );

		// Remove tracked package versions, since they depend on the Jetpack Connection.
		delete_option( Package_Version_Tracker::PACKAGE_VERSION_OPTION );

		$jetpack_unique_connection = \Jetpack_Options::get_option( 'unique_connection' );
		if ( $jetpack_unique_connection ) {
			// Check then record unique disconnection if site has never been disconnected previously.
			if ( - 1 === $jetpack_unique_connection['disconnected'] ) {
				$jetpack_unique_connection['disconnected'] = 1;
			} else {
				if ( 0 === $jetpack_unique_connection['disconnected'] ) {
					$a8c_mc_stats_instance = new A8c_Mc_Stats();
					$a8c_mc_stats_instance->add( 'connections', 'unique-disconnect' );
					$a8c_mc_stats_instance->do_server_side_stats();
				}
				// increment number of times disconnected.
				$jetpack_unique_connection['disconnected'] += 1;
			}

			\Jetpack_Options::update_option( 'unique_connection', $jetpack_unique_connection );
		}

		/**
		 * Fires when a site is disconnected.
		 *
		 * @since 1.30.1
		 */
		do_action( 'jetpack_site_disconnected' );
	}

	/**
	 * The Base64 Encoding of the SHA1 Hash of the Input.
	 *
	 * @param string $text The string to hash.
	 * @return string
	 */
	public function sha1_base64( $text ) {
		return base64_encode( sha1( $text, true ) ); // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode
	}

	/**
	 * This function mirrors Jetpack_Data::is_usable_domain() in the WPCOM codebase.
	 *
	 * @param string $domain The domain to check.
	 *
	 * @return bool|WP_Error
	 */
	public function is_usable_domain( $domain ) {

		// If it's empty, just fail out.
		if ( ! $domain ) {
			return new \WP_Error(
				'fail_domain_empty',
				/* translators: %1$s is a domain name. */
				sprintf( __( 'Domain `%1$s` just failed is_usable_domain check as it is empty.', 'jetpack-connection' ), $domain )
			);
		}

		/**
		 * Skips the usuable domain check when connecting a site.
		 *
		 * Allows site administrators with domains that fail gethostname-based checks to pass the request to WP.com
		 *
		 * @since 1.7.0
		 * @since-jetpack 4.1.0
		 *
		 * @param bool If the check should be skipped. Default false.
		 */
		if ( apply_filters( 'jetpack_skip_usuable_domain_check', false ) ) {
			return true;
		}

		// None of the explicit localhosts.
		$forbidden_domains = array(
			'wordpress.com',
			'localhost',
			'localhost.localdomain',
			'local.wordpress.test',         // VVV pattern.
			'local.wordpress-trunk.test',   // VVV pattern.
			'src.wordpress-develop.test',   // VVV pattern.
			'build.wordpress-develop.test', // VVV pattern.
		);
		if ( in_array( $domain, $forbidden_domains, true ) ) {
			return new \WP_Error(
				'fail_domain_forbidden',
				sprintf(
					/* translators: %1$s is a domain name. */
					__(
						'Domain `%1$s` just failed is_usable_domain check as it is in the forbidden array.',
						'jetpack-connection'
					),
					$domain
				)
			);
		}

		// No .test or .local domains.
		if ( preg_match( '#\.(test|local)$#i', $domain ) ) {
			return new \WP_Error(
				'fail_domain_tld',
				sprintf(
					/* translators: %1$s is a domain name. */
					__(
						'Domain `%1$s` just failed is_usable_domain check as it uses an invalid top level domain.',
						'jetpack-connection'
					),
					$domain
				)
			);
		}

		// No WPCOM subdomains.
		if ( preg_match( '#\.WordPress\.com$#i', $domain ) ) {
			return new \WP_Error(
				'fail_subdomain_wpcom',
				sprintf(
					/* translators: %1$s is a domain name. */
					__(
						'Domain `%1$s` just failed is_usable_domain check as it is a subdomain of WordPress.com.',
						'jetpack-connection'
					),
					$domain
				)
			);
		}

		// If PHP was compiled without support for the Filter module (very edge case).
		if ( ! function_exists( 'filter_var' ) ) {
			// Just pass back true for now, and let wpcom sort it out.
			return true;
		}

		$domain = preg_replace( '#^https?://#', '', untrailingslashit( $domain ) );

		if ( filter_var( $domain, FILTER_VALIDATE_IP )
			&& ! filter_var( $domain, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE )
		) {
			return new \WP_Error(
				'fail_ip_forbidden',
				sprintf(
					/* translators: %1$s is a domain name. */
					__(
						'IP address `%1$s` just failed is_usable_domain check as it is in the private network.',
						'jetpack-connection'
					),
					$domain
				)
			);
		}

		return true;
	}

	/**
	 * Gets the requested token.
	 *
	 * @deprecated 1.24.0 Use Automattic\Jetpack\Connection\Tokens->get_access_token() instead.
	 *
	 * @param int|false    $user_id   false: Return the Blog Token. int: Return that user's User Token.
	 * @param string|false $token_key If provided, check that the token matches the provided input.
	 * @param bool|true    $suppress_errors If true, return a falsy value when the token isn't found; When false, return a descriptive WP_Error when the token isn't found.
	 *
	 * @return object|false
	 *
	 * @see $this->get_tokens()->get_access_token()
	 */
	public function get_access_token( $user_id = false, $token_key = false, $suppress_errors = true ) {
		_deprecated_function( __METHOD__, '1.24.0', 'Automattic\\Jetpack\\Connection\\Tokens->get_access_token' );
		return $this->get_tokens()->get_access_token( $user_id, $token_key, $suppress_errors );
	}

	/**
	 * In some setups, $HTTP_RAW_POST_DATA can be emptied during some IXR_Server paths
	 * since it is passed by reference to various methods.
	 * Capture it here so we can verify the signature later.
	 *
	 * @param array $methods an array of available XMLRPC methods.
	 * @return array the same array, since this method doesn't add or remove anything.
	 */
	public function xmlrpc_methods( $methods ) {
		$this->raw_post_data = isset( $GLOBALS['HTTP_RAW_POST_DATA'] ) ? $GLOBALS['HTTP_RAW_POST_DATA'] : null;
		return $methods;
	}

	/**
	 * Resets the raw post data parameter for testing purposes.
	 */
	public function reset_raw_post_data() {
		$this->raw_post_data = null;
	}

	/**
	 * Registering an additional method.
	 *
	 * @param array $methods an array of available XMLRPC methods.
	 * @return array the amended array in case the method is added.
	 */
	public function public_xmlrpc_methods( $methods ) {
		if ( array_key_exists( 'wp.getOptions', $methods ) ) {
			$methods['wp.getOptions'] = array( $this, 'jetpack_get_options' );
		}
		return $methods;
	}

	/**
	 * Handles a getOptions XMLRPC method call.
	 *
	 * @param array $args method call arguments.
	 * @return array|IXR_Error An amended XMLRPC server options array.
	 */
	public function jetpack_get_options( $args ) {
		global $wp_xmlrpc_server;

		$wp_xmlrpc_server->escape( $args );

		$username = $args[1];
		$password = $args[2];

		$user = $wp_xmlrpc_server->login( $username, $password );
		if ( ! $user ) {
			return $wp_xmlrpc_server->error;
		}

		$options   = array();
		$user_data = $this->get_connected_user_data();
		if ( is_array( $user_data ) ) {
			$options['jetpack_user_id']         = array(
				'desc'     => __( 'The WP.com user ID of the connected user', 'jetpack-connection' ),
				'readonly' => true,
				'value'    => $user_data['ID'],
			);
			$options['jetpack_user_login']      = array(
				'desc'     => __( 'The WP.com username of the connected user', 'jetpack-connection' ),
				'readonly' => true,
				'value'    => $user_data['login'],
			);
			$options['jetpack_user_email']      = array(
				'desc'     => __( 'The WP.com user email of the connected user', 'jetpack-connection' ),
				'readonly' => true,
				'value'    => $user_data['email'],
			);
			$options['jetpack_user_site_count'] = array(
				'desc'     => __( 'The number of sites of the connected WP.com user', 'jetpack-connection' ),
				'readonly' => true,
				'value'    => $user_data['site_count'],
			);
		}
		$wp_xmlrpc_server->blog_options = array_merge( $wp_xmlrpc_server->blog_options, $options );
		$args                           = stripslashes_deep( $args );
		return $wp_xmlrpc_server->wp_getOptions( $args );
	}

	/**
	 * Adds Jetpack-specific options to the output of the XMLRPC options method.
	 *
	 * @param array $options standard Core options.
	 * @return array amended options.
	 */
	public function xmlrpc_options( $options ) {
		$jetpack_client_id = false;
		if ( $this->is_connected() ) {
			$jetpack_client_id = \Jetpack_Options::get_option( 'id' );
		}
		$options['jetpack_version'] = array(
			'desc'     => __( 'Jetpack Plugin Version', 'jetpack-connection' ),
			'readonly' => true,
			'value'    => Constants::get_constant( 'JETPACK__VERSION' ),
		);

		$options['jetpack_client_id'] = array(
			'desc'     => __( 'The Client ID/WP.com Blog ID of this site', 'jetpack-connection' ),
			'readonly' => true,
			'value'    => $jetpack_client_id,
		);
		return $options;
	}

	/**
	 * Resets the saved authentication state in between testing requests.
	 */
	public function reset_saved_auth_state() {
		$this->xmlrpc_verification = null;
	}

	/**
	 * Sign a user role with the master access token.
	 * If not specified, will default to the current user.
	 *
	 * @access public
	 *
	 * @param string $role    User role.
	 * @param int    $user_id ID of the user.
	 * @return string Signed user role.
	 */
	public function sign_role( $role, $user_id = null ) {
		return $this->get_tokens()->sign_role( $role, $user_id );
	}

	/**
	 * Set the plugin instance.
	 *
	 * @param Plugin $plugin_instance The plugin instance.
	 *
	 * @return $this
	 */
	public function set_plugin_instance( Plugin $plugin_instance ) {
		$this->plugin = $plugin_instance;

		return $this;
	}

	/**
	 * Retrieve the plugin management object.
	 *
	 * @return Plugin|null
	 */
	public function get_plugin() {
		return $this->plugin;
	}

	/**
	 * Get all connected plugins information, excluding those disconnected by user.
	 * WARNING: the method cannot be called until Plugin_Storage::configure is called, which happens on plugins_loaded
	 * Even if you don't use Jetpack Config, it may be introduced later by other plugins,
	 * so please make sure not to run the method too early in the code.
	 *
	 * @return array|WP_Error
	 */
	public function get_connected_plugins() {
		$maybe_plugins = Plugin_Storage::get_all();

		if ( $maybe_plugins instanceof WP_Error ) {
			return $maybe_plugins;
		}

		return $maybe_plugins;
	}

	/**
	 * Force plugin disconnect. After its called, the plugin will not be allowed to use the connection.
	 * Note: this method does not remove any access tokens.
	 *
	 * @deprecated since 1.39.0
	 * @return bool
	 */
	public function disable_plugin() {
		return null;
	}

	/**
	 * Force plugin reconnect after user-initiated disconnect.
	 * After its called, the plugin will be allowed to use the connection again.
	 * Note: this method does not initialize access tokens.
	 *
	 * @deprecated since 1.39.0.
	 * @return bool
	 */
	public function enable_plugin() {
		return null;
	}

	/**
	 * Whether the plugin is allowed to use the connection, or it's been disconnected by user.
	 * If no plugin slug was passed into the constructor, always returns true.
	 *
	 * @deprecated 1.42.0 This method no longer has a purpose after the removal of the soft disconnect feature.
	 *
	 * @return bool
	 */
	public function is_plugin_enabled() {
		return true;
	}

	/**
	 * Perform the API request to refresh the blog token.
	 * Note that we are making this request on behalf of the Jetpack master user,
	 * given they were (most probably) the ones that registered the site at the first place.
	 *
	 * @return WP_Error|bool The result of updating the blog_token option.
	 */
	public function refresh_blog_token() {
		( new Tracking() )->record_user_event( 'restore_connection_refresh_blog_token' );

		$blog_id = \Jetpack_Options::get_option( 'id' );
		if ( ! $blog_id ) {
			return new WP_Error( 'site_not_registered', 'Site not registered.' );
		}

		$url     = sprintf(
			'%s/%s/v%s/%s',
			Constants::get_constant( 'JETPACK__WPCOM_JSON_API_BASE' ),
			'wpcom',
			'2',
			'sites/' . $blog_id . '/jetpack-refresh-blog-token'
		);
		$method  = 'POST';
		$user_id = get_current_user_id();

		$response = Client::remote_request( compact( 'url', 'method', 'user_id' ) );

		if ( is_wp_error( $response ) ) {
			return new WP_Error( 'refresh_blog_token_http_request_failed', $response->get_error_message() );
		}

		$code   = wp_remote_retrieve_response_code( $response );
		$entity = wp_remote_retrieve_body( $response );

		if ( $entity ) {
			$json = json_decode( $entity );
		} else {
			$json = false;
		}

		if ( 200 !== $code ) {
			if ( empty( $json->code ) ) {
				return new WP_Error( 'unknown', '', $code );
			}

			/* translators: Error description string. */
			$error_description = isset( $json->message ) ? sprintf( __( 'Error Details: %s', 'jetpack-connection' ), (string) $json->message ) : '';

			return new WP_Error( (string) $json->code, $error_description, $code );
		}

		if ( empty( $json->jetpack_secret ) || ! is_scalar( $json->jetpack_secret ) ) {
			return new WP_Error( 'jetpack_secret', '', $code );
		}

		Error_Handler::get_instance()->delete_all_errors();

		return $this->get_tokens()->update_blog_token( (string) $json->jetpack_secret );
	}

	/**
	 * Disconnect the user from WP.com, and initiate the reconnect process.
	 *
	 * @return bool
	 */
	public function refresh_user_token() {
		( new Tracking() )->record_user_event( 'restore_connection_refresh_user_token' );
		$this->disconnect_user( null, true, true );
		return true;
	}

	/**
	 * Fetches a signed token.
	 *
	 * @deprecated 1.24.0 Use Automattic\Jetpack\Connection\Tokens->get_signed_token() instead.
	 *
	 * @param object $token the token.
	 * @return WP_Error|string a signed token
	 */
	public function get_signed_token( $token ) {
		_deprecated_function( __METHOD__, '1.24.0', 'Automattic\\Jetpack\\Connection\\Tokens->get_signed_token' );
		return $this->get_tokens()->get_signed_token( $token );
	}

	/**
	 * If the site-level connection is active, add the list of plugins using connection to the heartbeat (except Jetpack itself)
	 *
	 * @param array $stats The Heartbeat stats array.
	 * @return array $stats
	 */
	public function add_stats_to_heartbeat( $stats ) {

		if ( ! $this->is_connected() ) {
			return $stats;
		}

		$active_plugins_using_connection = Plugin_Storage::get_all();
		foreach ( array_keys( $active_plugins_using_connection ) as $plugin_slug ) {
			if ( 'jetpack' !== $plugin_slug ) {
				$stats_group             = isset( $active_plugins_using_connection['jetpack'] ) ? 'combined-connection' : 'standalone-connection';
				$stats[ $stats_group ][] = $plugin_slug;
			}
		}
		return $stats;
	}

	/**
	 * Get the WPCOM or self-hosted site ID.
	 *
	 * @param bool $quiet Return null instead of an error.
	 *
	 * @return int|WP_Error|null
	 */
	public static function get_site_id( $quiet = false ) {
		$is_wpcom = ( defined( 'IS_WPCOM' ) && IS_WPCOM );
		$site_id  = $is_wpcom ? get_current_blog_id() : \Jetpack_Options::get_option( 'id' );
		if ( ! $site_id ) {
			return $quiet
				? null
				: new \WP_Error(
					'unavailable_site_id',
					__( 'Sorry, something is wrong with your Jetpack connection.', 'jetpack-connection' ),
					403
				);
		}
		return (int) $site_id;
	}

	/**
	 * Check if Jetpack is ready for uninstall cleanup.
	 *
	 * @param string $current_plugin_slug The current plugin's slug.
	 *
	 * @return bool
	 */
	public static function is_ready_for_cleanup( $current_plugin_slug ) {
		$active_plugins = get_option( Plugin_Storage::ACTIVE_PLUGINS_OPTION_NAME );

		return empty( $active_plugins ) || ! is_array( $active_plugins )
			|| ( count( $active_plugins ) === 1 && array_key_exists( $current_plugin_slug, $active_plugins ) );
	}
}