Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/modules/update/src/UpdateFetcherInterface.php

@@ -0,0 +1,63 @@
+<?php
+/**
+ * @file
+ * Contains \Drupal\update\UpdateFetcherInterface.
+ */
+
+namespace Drupal\update;
+
+/**
+ * Fetches project information from remote locations.
+ */
+interface UpdateFetcherInterface {
+
+  /**
+   * Returns the base of the URL to fetch available update data for a project.
+   *
+   * @param array $project
+   *   The array of project information from
+   *   \Drupal\Update\UpdateManager::getProjects().
+   *
+   * @return string
+   *   The base of the URL used for fetching available update data. This does
+   *   not include the path elements to specify a particular project, version,
+   *   site_key, etc.
+   */
+  public function getFetchBaseUrl($project);
+
+  /**
+   * Retrieves the project information.
+   *
+   * @param array $project
+   *   The array of project information from
+   *   \Drupal\Update\UpdateManager::getProjects().
+   * @param string $site_key
+   *   (optional) The anonymous site key hash. Defaults to an empty string.
+   *
+   * @return string
+   *   The project information fetched as string. Empty string upon failure.
+   */
+  public function fetchProjectData(array $project, $site_key = '');
+
+  /**
+   * Generates the URL to fetch information about project updates.
+   *
+   * This figures out the right URL to use, based on the project's .info.yml
+   * file and the global defaults. Appends optional query arguments when the
+   * site is configured to report usage stats.
+   *
+   * @param array $project
+   *   The array of project information from
+   *   \Drupal\Update\UpdateManager::getProjects().
+   * @param string $site_key
+   *   (optional) The anonymous site key hash. Defaults to an empty string.
+   *
+   * @return string
+   *   The URL for fetching information about updates to the specified project.
+   *
+   * @see \Drupal\update\UpdateProcessor::fetchData()
+   * @see \Drupal\update\UpdateProcessor::processFetchTask()
+   * @see \Drupal\update\UpdateManager::getProjects()
+   */
+  public function buildFetchUrl(array $project, $site_key = '');
+}