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<?php
/**
* WPSEO plugin file.
*
* @package WPSEO\Admin
*/
/**
* Represents the class that contains the available extensions for Yoast SEO.
*/
class WPSEO_Extension_Manager {
/**
* The transient key to save the cache in.
*
* @var string
*/
const TRANSIENT_CACHE_KEY = 'wpseo_license_active_extensions';
/**
* @var WPSEO_Extension[]
*/
protected $extensions = array();
/**
* List of active plugins.
*
* @var array
*/
protected static $active_extensions;
/**
* Adds an extension to the manager.
*
* @param string $extension_name The extension name.
* @param WPSEO_Extension $extension The extension value object.
*
* @return void
*/
public function add( $extension_name, WPSEO_Extension $extension = null ) {
$this->extensions[ $extension_name ] = $extension;
}
/**
* Removes an extension from the manager.
*
* @param string $extension_name The name of the extension to remove.
*
* @return void
*/
public function remove( $extension_name ) {
if ( array_key_exists( $extension_name, $this->extensions ) ) {
unset( $this->extensions[ $extension_name ] );
}
}
/**
* Returns the extension for the given extension name.
*
* @param string $extension_name The name of the extension to get.
*
* @return null|WPSEO_Extension The extension object or null when it doesn't exist.
*/
public function get( $extension_name ) {
if ( array_key_exists( $extension_name, $this->extensions ) ) {
return $this->extensions[ $extension_name ];
}
return null;
}
/**
* Returns all set extension.
*
* @return WPSEO_Extension[] Array with the extensions.
*/
public function get_all() {
return $this->extensions;
}
/**
* Checks if the plugin is activated within My Yoast.
*
* @param string $extension_name The extension name to check.
*
* @return bool True when the plugin is activated.
*/
public function is_activated( $extension_name ) {
if ( self::$active_extensions === null ) {
// Force re-check on license & dashboard pages.
$current_page = $this->get_current_page();
// Check whether the licenses are valid or whether we need to show notifications.
$exclude_cache = ( $current_page === 'wpseo_licenses' || $current_page === 'wpseo_dashboard' );
// Fetch transient data on any other page.
if ( ! $exclude_cache ) {
self::$active_extensions = $this->get_cached_extensions();
}
// If the active extensions is still NULL, we need to set it.
if ( ! is_array( self::$active_extensions ) ) {
self::$active_extensions = $this->retrieve_active_extensions();
$this->set_cached_extensions( self::$active_extensions );
}
}
return in_array( $extension_name, self::$active_extensions, true );
}
/**
* Retrieves the active extensions via an external request.
*
* @return array Array containing the active extensions.
*/
protected function retrieve_active_extensions() {
return (array) apply_filters( 'yoast-active-extensions', array() );
}
/**
* Returns the current page.
*
* @return string The current page.
*/
protected function get_current_page() {
return filter_input( INPUT_GET, 'page' );
}
/**
* Gets a cached list of active extensions.
*
* @return boolean|array The cached extensions.
*/
protected function get_cached_extensions() {
return get_transient( self::TRANSIENT_CACHE_KEY );
}
/**
* Sets the active extensions transient for the set duration.
*
* @param array $extensions The extensions to add.
* @param int $duration The duration that the list of extensions needs to remain cached.
*
* @return void
*/
protected function set_cached_extensions( $extensions, $duration = DAY_IN_SECONDS ) {
set_transient( self::TRANSIENT_CACHE_KEY, $extensions, $duration );
}
}
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