UpdaterInterface.php

<?php

namespace Drupal\Core\Updater;


/**
 * Defines an interface for a class which can update a Drupal project.
 *
 * An Updater currently serves the following purposes:
 *   - It can take a given directory, and determine if it can operate on it.
 *   - It can move the contents of that directory into the appropriate place
 *     on the system using FileTransfer classes.
 *   - It can return a list of "next steps" after an update or install.
 *   - In the future, it will most likely perform some of those steps as well.
 */
interface UpdaterInterface {
    
    /**
     * Checks if the project is installed.
     *
     * @return bool
     */
    public function isInstalled();
    
    /**
     * Returns the system name of the project.
     *
     * @param string $directory
     *   A directory containing a project.
     */
    public static function getProjectName($directory);
    
    /**
     * Returns the path to the default install location for the current project.
     *
     * @return string
     *   An absolute path to the default install location.
     */
    public function getInstallDirectory();
    
    /**
     * Returns the name of the root directory under which projects will be copied.
     *
     * @return string
     *   A relative path to the root directory.
     */
    public static function getRootDirectoryRelativePath();
    
    /**
     * Determines if the Updater can handle the project provided in $directory.
     *
     * @param string $directory
     *   The directory.
     *
     * @return bool
     *   TRUE if the project is installed, FALSE if not.
     */
    public static function canUpdateDirectory($directory);
    
    /**
     * Actions to run after an install has occurred.
     */
    public function postInstall();
    
    /**
     * Actions to run after an update has occurred.
     */
    public function postUpdate();

}