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<?php
if ( !class_exists('Puc_v4p6_UpgraderStatus', false) ):
/**
* A utility class that helps figure out which plugin or theme WordPress is upgrading.
*
* It may seem strange to have a separate class just for that, but the task is surprisingly complicated.
* Core classes like Plugin_Upgrader don't expose the plugin file name during an in-progress update (AFAICT).
* This class uses a few workarounds and heuristics to get the file name.
*/
class Puc_v4p6_UpgraderStatus {
private $currentType = null; //"plugin" or "theme".
private $currentId = null; //Plugin basename or theme directory name.
public function __construct() {
//Keep track of which plugin/theme WordPress is currently upgrading.
add_filter('upgrader_pre_install', array($this, 'setUpgradedThing'), 10, 2);
add_filter('upgrader_package_options', array($this, 'setUpgradedPluginFromOptions'), 10, 1);
add_filter('upgrader_post_install', array($this, 'clearUpgradedThing'), 10, 1);
add_action('upgrader_process_complete', array($this, 'clearUpgradedThing'), 10, 1);
}
/**
* Is there and update being installed RIGHT NOW, for a specific plugin?
*
* Caution: This method is unreliable. WordPress doesn't make it easy to figure out what it is upgrading,
* and upgrader implementations are liable to change without notice.
*
* @param string $pluginFile The plugin to check.
* @param WP_Upgrader|null $upgrader The upgrader that's performing the current update.
* @return bool True if the plugin identified by $pluginFile is being upgraded.
*/
public function isPluginBeingUpgraded($pluginFile, $upgrader = null) {
return $this->isBeingUpgraded('plugin', $pluginFile, $upgrader);
}
/**
* Is there an update being installed for a specific theme?
*
* @param string $stylesheet Theme directory name.
* @param WP_Upgrader|null $upgrader The upgrader that's performing the current update.
* @return bool
*/
public function isThemeBeingUpgraded($stylesheet, $upgrader = null) {
return $this->isBeingUpgraded('theme', $stylesheet, $upgrader);
}
/**
* Check if a specific theme or plugin is being upgraded.
*
* @param string $type
* @param string $id
* @param Plugin_Upgrader|WP_Upgrader|null $upgrader
* @return bool
*/
protected function isBeingUpgraded($type, $id, $upgrader = null) {
if ( isset($upgrader) ) {
list($currentType, $currentId) = $this->getThingBeingUpgradedBy($upgrader);
if ( $currentType !== null ) {
$this->currentType = $currentType;
$this->currentId = $currentId;
}
}
return ($this->currentType === $type) && ($this->currentId === $id);
}
/**
* Figure out which theme or plugin is being upgraded by a WP_Upgrader instance.
*
* Returns an array with two items. The first item is the type of the thing that's being
* upgraded: "plugin" or "theme". The second item is either the plugin basename or
* the theme directory name. If we can't determine what the upgrader is doing, both items
* will be NULL.
*
* Examples:
* ['plugin', 'plugin-dir-name/plugin.php']
* ['theme', 'theme-dir-name']
*
* @param Plugin_Upgrader|WP_Upgrader $upgrader
* @return array
*/
private function getThingBeingUpgradedBy($upgrader) {
if ( !isset($upgrader, $upgrader->skin) ) {
return array(null, null);
}
//Figure out which plugin or theme is being upgraded.
$pluginFile = null;
$themeDirectoryName = null;
$skin = $upgrader->skin;
if ( isset($skin->theme_info) && ($skin->theme_info instanceof WP_Theme) ) {
$themeDirectoryName = $skin->theme_info->get_stylesheet();
} elseif ( $skin instanceof Plugin_Upgrader_Skin ) {
if ( isset($skin->plugin) && is_string($skin->plugin) && ($skin->plugin !== '') ) {
$pluginFile = $skin->plugin;
}
} elseif ( $skin instanceof Theme_Upgrader_Skin ) {
if ( isset($skin->theme) && is_string($skin->theme) && ($skin->theme !== '') ) {
$themeDirectoryName = $skin->theme;
}
} elseif ( isset($skin->plugin_info) && is_array($skin->plugin_info) ) {
//This case is tricky because Bulk_Plugin_Upgrader_Skin (etc) doesn't actually store the plugin
//filename anywhere. Instead, it has the plugin headers in $plugin_info. So the best we can
//do is compare those headers to the headers of installed plugins.
$pluginFile = $this->identifyPluginByHeaders($skin->plugin_info);
}
if ( $pluginFile !== null ) {
return array('plugin', $pluginFile);
} elseif ( $themeDirectoryName !== null ) {
return array('theme', $themeDirectoryName);
}
return array(null, null);
}
/**
* Identify an installed plugin based on its headers.
*
* @param array $searchHeaders The plugin file header to look for.
* @return string|null Plugin basename ("foo/bar.php"), or NULL if we can't identify the plugin.
*/
private function identifyPluginByHeaders($searchHeaders) {
if ( !function_exists('get_plugins') ){
/** @noinspection PhpIncludeInspection */
require_once( ABSPATH . '/wp-admin/includes/plugin.php' );
}
$installedPlugins = get_plugins();
$matches = array();
foreach($installedPlugins as $pluginBasename => $headers) {
$diff1 = array_diff_assoc($headers, $searchHeaders);
$diff2 = array_diff_assoc($searchHeaders, $headers);
if ( empty($diff1) && empty($diff2) ) {
$matches[] = $pluginBasename;
}
}
//It's possible (though very unlikely) that there could be two plugins with identical
//headers. In that case, we can't unambiguously identify the plugin that's being upgraded.
if ( count($matches) !== 1 ) {
return null;
}
return reset($matches);
}
/**
* @access private
*
* @param mixed $input
* @param array $hookExtra
* @return mixed Returns $input unaltered.
*/
public function setUpgradedThing($input, $hookExtra) {
if ( !empty($hookExtra['plugin']) && is_string($hookExtra['plugin']) ) {
$this->currentId = $hookExtra['plugin'];
$this->currentType = 'plugin';
} elseif ( !empty($hookExtra['theme']) && is_string($hookExtra['theme']) ) {
$this->currentId = $hookExtra['theme'];
$this->currentType = 'theme';
} else {
$this->currentType = null;
$this->currentId = null;
}
return $input;
}
/**
* @access private
*
* @param array $options
* @return array
*/
public function setUpgradedPluginFromOptions($options) {
if ( isset($options['hook_extra']['plugin']) && is_string($options['hook_extra']['plugin']) ) {
$this->currentType = 'plugin';
$this->currentId = $options['hook_extra']['plugin'];
} else {
$this->currentType = null;
$this->currentId = null;
}
return $options;
}
/**
* @access private
*
* @param mixed $input
* @return mixed Returns $input unaltered.
*/
public function clearUpgradedThing($input = null) {
$this->currentId = null;
$this->currentType = null;
return $input;
}
}
endif;