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<?php
/**
* Plugin Update Checker Library 2.3.0
* http://w-shadow.com/
*
* Copyright 2015 Janis Elsts
* Released under the MIT license. See license.txt for details.
*/
if ( !class_exists('PluginUpdateChecker_2_3', false) ):
/**
* A custom plugin update checker.
*
* @author Janis Elsts
* @copyright 2015
* @version 2.3
* @access public
*/
class PluginUpdateChecker_2_3 {
public $metadataUrl = ''; //The URL of the plugin's metadata file.
public $pluginAbsolutePath = ''; //Full path of the main plugin file.
public $pluginFile = ''; //Plugin filename relative to the plugins directory. Many WP APIs use this to identify plugins.
public $slug = ''; //Plugin slug.
public $checkPeriod = 12; //How often to check for updates (in hours).
public $optionName = ''; //Where to store the update info.
public $muPluginFile = ''; //For MU plugins, the plugin filename relative to the mu-plugins directory.
public $debugMode = false; //Set to TRUE to enable error reporting. Errors are raised using trigger_error()
//and should be logged to the standard PHP error log.
public $throttleRedundantChecks = false; //Check less often if we already know that an update is available.
public $throttledCheckPeriod = 72;
private $cronHook = null;
private $cachedInstalledVersion = null;
private $upgradedPluginFile = null; //The plugin that is currently being upgraded by WordPress.
/**
* Class constructor.
*
* @param string $metadataUrl The URL of the plugin's metadata file.
* @param string $pluginFile Fully qualified path to the main plugin file.
* @param string $slug The plugin's 'slug'. If not specified, the filename part of $pluginFile sans '.php' will be used as the slug.
* @param integer $checkPeriod How often to check for updates (in hours). Defaults to checking every 12 hours. Set to 0 to disable automatic update checks.
* @param string $optionName Where to store book-keeping info about update checks. Defaults to 'external_updates-$slug'.
* @param string $muPluginFile Optional. The plugin filename relative to the mu-plugins directory.
*/
public function __construct($metadataUrl, $pluginFile, $slug = '', $checkPeriod = 12, $optionName = '', $muPluginFile = ''){
$this->metadataUrl = $metadataUrl;
$this->pluginAbsolutePath = $pluginFile;
$this->pluginFile = plugin_basename($this->pluginAbsolutePath);
$this->muPluginFile = $muPluginFile;
$this->checkPeriod = $checkPeriod;
$this->slug = $slug;
$this->optionName = $optionName;
$this->debugMode = defined('WP_DEBUG') && WP_DEBUG;
//If no slug is specified, use the name of the main plugin file as the slug.
//For example, 'my-cool-plugin/cool-plugin.php' becomes 'cool-plugin'.
if ( empty($this->slug) ){
$this->slug = basename($this->pluginFile, '.php');
}
if ( empty($this->optionName) ){
$this->optionName = 'external_updates-' . $this->slug;
}
//Backwards compatibility: If the plugin is a mu-plugin but no $muPluginFile is specified, assume
//it's the same as $pluginFile given that it's not in a subdirectory (WP only looks in the base dir).
if ( empty($this->muPluginFile) && (strpbrk($this->pluginFile, '/\\') === false) && $this->isMuPlugin() ) {
$this->muPluginFile = $this->pluginFile;
}
$this->installHooks();
}
/**
* Install the hooks required to run periodic update checks and inject update info
* into WP data structures.
*
* @return void
*/
protected function installHooks(){
$this->checkForUpdates();
//Override requests for plugin information
add_filter('plugins_api', array($this, 'injectInfo'), 20, 3);
//Insert our update info into the update array maintained by WP
add_filter('site_transient_update_plugins', array($this,'injectUpdate')); //WP 3.0+
add_filter('transient_update_plugins', array($this,'injectUpdate')); //WP 2.8+
add_filter('plugin_row_meta', array($this, 'addCheckForUpdatesLink'), 10, 2);
add_action('admin_init', array($this, 'handleManualCheck'));
add_action('all_admin_notices', array($this, 'displayManualCheckResult'));
//Clear the version number cache when something - anything - is upgraded or WP clears the update cache.
add_filter('upgrader_post_install', array($this, 'clearCachedVersion'));
add_action('delete_site_transient_update_plugins', array($this, 'clearCachedVersion'));
//Set up the periodic update checks
$this->cronHook = 'check_plugin_updates-' . $this->slug;
if ( $this->checkPeriod > 0 ){
//Trigger the check via Cron.
//Try to use one of the default schedules if possible as it's less likely to conflict
//with other plugins and their custom schedules.
$defaultSchedules = array(
1 => 'hourly',
12 => 'twicedaily',
24 => 'daily',
);
if ( array_key_exists($this->checkPeriod, $defaultSchedules) ) {
$scheduleName = $defaultSchedules[$this->checkPeriod];
} else {
//Use a custom cron schedule.
$scheduleName = 'every' . $this->checkPeriod . 'hours';
add_filter('cron_schedules', array($this, '_addCustomSchedule'));
}
if ( !wp_next_scheduled($this->cronHook) && !defined('WP_INSTALLING') ) {
wp_schedule_event(time(), $scheduleName, $this->cronHook);
}
add_action($this->cronHook, array($this, 'maybeCheckForUpdates'));
register_deactivation_hook($this->pluginFile, array($this, '_removeUpdaterCron'));
//In case Cron is disabled or unreliable, we also manually trigger
//the periodic checks while the user is browsing the Dashboard.
add_action( 'admin_init', array($this, 'maybeCheckForUpdates') );
//Like WordPress itself, we check more often on certain pages.
/** @see wp_update_plugins */
add_action('load-update-core.php', array($this, 'maybeCheckForUpdates'));
add_action('load-plugins.php', array($this, 'maybeCheckForUpdates'));
add_action('load-update.php', array($this, 'maybeCheckForUpdates'));
//This hook fires after a bulk update is complete.
add_action('upgrader_process_complete', array($this, 'maybeCheckForUpdates'), 11, 0);
} else {
//Periodic checks are disabled.
wp_clear_scheduled_hook($this->cronHook);
}
//Rename the update directory to be the same as the existing directory.
add_filter('upgrader_source_selection', array($this, 'fixDirectoryName'), 10, 3);
//Keep track of which plugin WordPress is currently upgrading.
add_filter('upgrader_pre_install', array($this, 'setUpgradedPlugin'), 10, 2);
add_filter('upgrader_package_options', array($this, 'setUpgradedPluginFromOptions'), 10, 1);
add_filter('upgrader_post_install', array($this, 'clearUpgradedPlugin'), 10, 1);
add_action('upgrader_process_complete', array($this, 'clearUpgradedPlugin'), 10, 1);
}
/**
* Add our custom schedule to the array of Cron schedules used by WP.
*
* @param array $schedules
* @return array
*/
public function _addCustomSchedule($schedules){
if ( $this->checkPeriod && ($this->checkPeriod > 0) ){
$scheduleName = 'every' . $this->checkPeriod . 'hours';
$schedules[$scheduleName] = array(
'interval' => $this->checkPeriod * 3600,
'display' => sprintf('Every %d hours', $this->checkPeriod),
);
}
return $schedules;
}
/**
* Remove the scheduled cron event that the library uses to check for updates.
*
* @return void
*/
public function _removeUpdaterCron(){
wp_clear_scheduled_hook($this->cronHook);
}
/**
* Get the name of the update checker's WP-cron hook. Mostly useful for debugging.
*
* @return string
*/
public function getCronHookName() {
return $this->cronHook;
}
/**
* Retrieve plugin info from the configured API endpoint.
*
* @uses wp_remote_get()
*
* @param array $queryArgs Additional query arguments to append to the request. Optional.
* @return PluginInfo
*/
public function requestInfo($queryArgs = array()){
//Query args to append to the URL. Plugins can add their own by using a filter callback (see addQueryArgFilter()).
$installedVersion = $this->getInstalledVersion();
$queryArgs['installed_version'] = ($installedVersion !== null) ? $installedVersion : '';
$queryArgs = apply_filters('puc_request_info_query_args-'.$this->slug, $queryArgs);
//Various options for the wp_remote_get() call. Plugins can filter these, too.
$options = array(
'timeout' => 10, //seconds
'headers' => array(
'Accept' => 'application/json'
),
);
$options = apply_filters('puc_request_info_options-'.$this->slug, $options);
//The plugin info should be at 'http://your-api.com/url/here/$slug/info.json'
$url = $this->metadataUrl;
if ( !empty($queryArgs) ){
$url = add_query_arg($queryArgs, $url);
}
$result = wp_remote_get(
$url,
$options
);
//Try to parse the response
$pluginInfo = null;
if ( !is_wp_error($result) && isset($result['response']['code']) && ($result['response']['code'] == 200) && !empty($result['body']) ){
$pluginInfo = PluginInfo_2_3::fromJson($result['body'], $this->debugMode);
if ( !$pluginInfo ){
return false;
}
$pluginInfo->filename = $this->pluginFile;
$pluginInfo->slug = $this->slug;
} else if ( $this->debugMode ) {
$message = sprintf("The URL %s does not point to a valid plugin metadata file. ", $url);
if ( is_wp_error($result) ) {
$message .= "WP HTTP error: " . $result->get_error_message();
} else if ( isset($result['response']['code']) ) {
$message .= "HTTP response code is " . $result['response']['code'] . " (expected: 200)";
} else {
$message .= "wp_remote_get() returned an unexpected result.";
}
trigger_error($message, E_USER_WARNING);
}
$pluginInfo = apply_filters('puc_request_info_result-'.$this->slug, $pluginInfo, $result);
return $pluginInfo;
}
/**
* Retrieve the latest update (if any) from the configured API endpoint.
*
* @uses PluginUpdateChecker::requestInfo()
*
* @return PluginUpdate An instance of PluginUpdate, or NULL when no updates are available.
*/
public function requestUpdate(){
//For the sake of simplicity, this function just calls requestInfo()
//and transforms the result accordingly.
$pluginInfo = $this->requestInfo(array('checking_for_updates' => '1'));
if ( $pluginInfo == null ){
return null;
}
return PluginUpdate_2_3::fromPluginInfo($pluginInfo);
}
/**
* Get the currently installed version of the plugin.
*
* @return string Version number.
*/
public function getInstalledVersion(){
if ( isset($this->cachedInstalledVersion) ) {
return $this->cachedInstalledVersion;
}
$pluginHeader = $this->getPluginHeader();
if ( isset($pluginHeader['Version']) ) {
$this->cachedInstalledVersion = $pluginHeader['Version'];
return $pluginHeader['Version'];
} else {
//This can happen if the filename points to something that is not a plugin.
if ( $this->debugMode ) {
trigger_error(
sprintf(
"Can't to read the Version header for '%s'. The filename is incorrect or is not a plugin.",
$this->pluginFile
),
E_USER_WARNING
);
}
return null;
}
}
/**
* Get plugin's metadata from its file header.
*
* @return array
*/
protected function getPluginHeader() {
if ( !is_file($this->pluginAbsolutePath) ) {
//This can happen if the plugin filename is wrong.
if ( $this->debugMode ) {
trigger_error(
sprintf(
"Can't to read the plugin header for '%s'. The file does not exist.",
$this->pluginFile
),
E_USER_WARNING
);
}
return array();
}
if ( !function_exists('get_plugin_data') ){
require_once( ABSPATH . '/wp-admin/includes/plugin.php' );
}
return get_plugin_data($this->pluginAbsolutePath, false, false);
}
/**
* Check for plugin updates.
* The results are stored in the DB option specified in $optionName.
*
* @return PluginUpdate|null
*/
public function checkForUpdates(){
$installedVersion = $this->getInstalledVersion();
//Fail silently if we can't find the plugin or read its header.
if ( $installedVersion === null ) {
if ( $this->debugMode ) {
trigger_error(
sprintf('Skipping update check for %s - installed version unknown.', $this->pluginFile),
E_USER_WARNING
);
}
return null;
}
$state = $this->getUpdateState();
if ( empty($state) ){
$state = new StdClass;
$state->lastCheck = 0;
$state->checkedVersion = '';
$state->update = null;
}
$state->lastCheck = time();
$state->checkedVersion = $installedVersion;
$this->setUpdateState($state); //Save before checking in case something goes wrong
$state->update = $this->requestUpdate();
$this->setUpdateState($state);
return $this->getUpdate();
}
/**
* Check for updates if the configured check interval has already elapsed.
* Will use a shorter check interval on certain admin pages like "Dashboard -> Updates" or when doing cron.
*
* You can override the default behaviour by using the "puc_check_now-$slug" filter.
* The filter callback will be passed three parameters:
* - Current decision. TRUE = check updates now, FALSE = don't check now.
* - Last check time as a Unix timestamp.
* - Configured check period in hours.
* Return TRUE to check for updates immediately, or FALSE to cancel.
*
* This method is declared public because it's a hook callback. Calling it directly is not recommended.
*/
public function maybeCheckForUpdates(){
if ( empty($this->checkPeriod) ){
return;
}
$currentFilter = current_filter();
if ( in_array($currentFilter, array('load-update-core.php', 'upgrader_process_complete')) ) {
//Check more often when the user visits "Dashboard -> Updates" or does a bulk update.
$timeout = 60;
} else if ( in_array($currentFilter, array('load-plugins.php', 'load-update.php')) ) {
//Also check more often on the "Plugins" page and /wp-admin/update.php.
$timeout = 3600;
} else if ( $this->throttleRedundantChecks && ($this->getUpdate() !== null) ) {
//Check less frequently if it's already known that an update is available.
$timeout = $this->throttledCheckPeriod * 3600;
} else if ( defined('DOING_CRON') && constant('DOING_CRON') ) {
//WordPress cron schedules are not exact, so lets do an update check even
//if slightly less than $checkPeriod hours have elapsed since the last check.
$cronFuzziness = 20 * 60;
$timeout = $this->checkPeriod * 3600 - $cronFuzziness;
} else {
$timeout = $this->checkPeriod * 3600;
}
$state = $this->getUpdateState();
$shouldCheck =
empty($state) ||
!isset($state->lastCheck) ||
( (time() - $state->lastCheck) >= $timeout );
//Let plugin authors substitute their own algorithm.
$shouldCheck = apply_filters(
'puc_check_now-' . $this->slug,
$shouldCheck,
(!empty($state) && isset($state->lastCheck)) ? $state->lastCheck : 0,
$this->checkPeriod
);
if ( $shouldCheck ){
$this->checkForUpdates();
}
}
/**
* Load the update checker state from the DB.
*
* @return StdClass|null
*/
public function getUpdateState() {
$state = get_site_option($this->optionName, null);
if ( empty($state) || !is_object($state)) {
$state = null;
}
if ( !empty($state) && isset($state->update) && is_object($state->update) ){
$state->update = PluginUpdate_2_3::fromObject($state->update);
}
return $state;
}
/**
* Persist the update checker state to the DB.
*
* @param StdClass $state
* @return void
*/
private function setUpdateState($state) {
if ( isset($state->update) && is_object($state->update) && method_exists($state->update, 'toStdClass') ) {
$update = $state->update; /** @var PluginUpdate $update */
$state->update = $update->toStdClass();
}
update_site_option($this->optionName, $state);
}
/**
* Reset update checker state - i.e. last check time, cached update data and so on.
*
* Call this when your plugin is being uninstalled, or if you want to
* clear the update cache.
*/
public function resetUpdateState() {
delete_site_option($this->optionName);
}
/**
* Intercept plugins_api() calls that request information about our plugin and
* use the configured API endpoint to satisfy them.
*
* @see plugins_api()
*
* @param mixed $result
* @param string $action
* @param array|object $args
* @return mixed
*/
public function injectInfo($result, $action = null, $args = null){
$relevant = ($action == 'plugin_information') && isset($args->slug) && (
($args->slug == $this->slug) || ($args->slug == dirname($this->pluginFile))
);
if ( !$relevant ){
return $result;
}
$pluginInfo = $this->requestInfo();
$pluginInfo = apply_filters('puc_pre_inject_info-' . $this->slug, $pluginInfo);
if ($pluginInfo){
return $pluginInfo->toWpFormat();
}
return $result;
}
/**
* Insert the latest update (if any) into the update list maintained by WP.
*
* @param StdClass $updates Update list.
* @return StdClass Modified update list.
*/
public function injectUpdate($updates){
//Is there an update to insert?
$update = $this->getUpdate();
//No update notifications for mu-plugins unless explicitly enabled. The MU plugin file
//is usually different from the main plugin file so the update wouldn't show up properly anyway.
if ( !empty($update) && empty($this->muPluginFile) && $this->isMuPlugin() ) {
$update = null;
}
if ( !empty($update) ) {
//Let plugins filter the update info before it's passed on to WordPress.
$update = apply_filters('puc_pre_inject_update-' . $this->slug, $update);
if ( !is_object($updates) ) {
$updates = new StdClass();
$updates->response = array();
}
$wpUpdate = $update->toWpFormat();
$pluginFile = $this->pluginFile;
if ( $this->isMuPlugin() ) {
//WP does not support automatic update installation for mu-plugins, but we can still display a notice.
$wpUpdate->package = null;
$pluginFile = $this->muPluginFile;
}
$updates->response[$pluginFile] = $wpUpdate;
} else if ( isset($updates, $updates->response) ) {
unset($updates->response[$this->pluginFile]);
if ( !empty($this->muPluginFile) ) {
unset($updates->response[$this->muPluginFile]);
}
}
return $updates;
}
/**
* Rename the update directory to match the existing plugin directory.
*
* When WordPress installs a plugin or theme update, it assumes that the ZIP file will contain
* exactly one directory, and that the directory name will be the same as the directory where
* the plugin/theme is currently installed.
*
* GitHub and other repositories provide ZIP downloads, but they often use directory names like
* "project-branch" or "project-tag-hash". We need to change the name to the actual plugin folder.
*
* @param string $source The directory to copy to /wp-content/plugins. Usually a subdirectory of $remoteSource.
* @param string $remoteSource WordPress has extracted the update to this directory.
* @param WP_Upgrader $upgrader
* @return string|WP_Error
*/
function fixDirectoryName($source, $remoteSource, $upgrader) {
global $wp_filesystem; /** @var WP_Filesystem_Base $wp_filesystem */
//Basic sanity checks.
if ( !isset($source, $remoteSource, $upgrader, $upgrader->skin, $wp_filesystem) ) {
return $source;
}
//If WordPress is upgrading anything other than our plugin, leave the directory name unchanged.
if ( !$this->isPluginBeingUpgraded($upgrader) ) {
return $source;
}
//Rename the source to match the existing plugin directory.
$pluginDirectoryName = dirname($this->pluginFile);
if ( ($pluginDirectoryName === '.') || ($pluginDirectoryName === '/') ) {
return $source;
}
$correctedSource = trailingslashit($remoteSource) . $pluginDirectoryName . '/';
if ( $source !== $correctedSource ) {
//The update archive should contain a single directory that contains the rest of plugin files. Otherwise,
//WordPress will try to copy the entire working directory ($source == $remoteSource). We can't rename
//$remoteSource because that would break WordPress code that cleans up temporary files after update.
$sourceFiles = $wp_filesystem->dirlist($remoteSource);
if ( is_array($sourceFiles) ) {
$sourceFiles = array_keys($sourceFiles);
$firstFilePath = trailingslashit($remoteSource) . $sourceFiles[0];
if ( (count($sourceFiles) > 1) || (!$wp_filesystem->is_dir($firstFilePath)) ) {
return new WP_Error(
'puc-incorrect-directory-structure',
sprintf(
'The directory structure of the update is incorrect. All plugin files should be inside ' .
'a directory named <span class="code">%s</span>, not at the root of the ZIP file.',
htmlentities($this->slug)
)
);
}
}
$upgrader->skin->feedback(sprintf(
'Renaming %s to %s…',
'<span class="code">' . basename($source) . '</span>',
'<span class="code">' . $pluginDirectoryName . '</span>'
));
if ( $wp_filesystem->move($source, $correctedSource, true) ) {
$upgrader->skin->feedback('Plugin directory successfully renamed.');
return $correctedSource;
} else {
return new WP_Error(
'puc-rename-failed',
'Unable to rename the update to match the existing plugin directory.'
);
}
}
return $source;
}
/**
* Is there and update being installed RIGHT NOW, for this 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 WP_Upgrader|null $upgrader The upgrader that's performing the current update.
* @return bool
*/
public function isPluginBeingUpgraded($upgrader = null) {
if ( isset($upgrader) ) {
$pluginFile = $this->getPluginBeingUpgradedBy($upgrader);
if ( !empty($pluginFile) ) {
$this->upgradedPluginFile = $pluginFile;
}
}
return ( !empty($this->upgradedPluginFile) && ($this->upgradedPluginFile === $this->pluginFile) );
}
/**
* Get the file name of the plugin that's currently being upgraded.
*
* @param Plugin_Upgrader|WP_Upgrader $upgrader
* @return string|null
*/
private function getPluginBeingUpgradedBy($upgrader) {
if ( !isset($upgrader, $upgrader->skin) ) {
return null;
}
//Figure out which plugin is being upgraded.
$pluginFile = null;
$skin = $upgrader->skin;
if ( $skin instanceof Plugin_Upgrader_Skin ) {
if ( isset($skin->plugin) && is_string($skin->plugin) && ($skin->plugin !== '') ) {
$pluginFile = $skin->plugin;
}
} elseif ( isset($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.
if ( !function_exists('get_plugins') ){
require_once( ABSPATH . '/wp-admin/includes/plugin.php' );
}
$installedPlugins = get_plugins();
$matches = array();
foreach($installedPlugins as $pluginBasename => $headers) {
$diff1 = array_diff_assoc($headers, $skin->plugin_info);
$diff2 = array_diff_assoc($skin->plugin_info, $headers);
if ( empty($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;
}
$pluginFile = reset($matches);
}
return $pluginFile;
}
/**
* @access private
*
* @param mixed $input
* @param array $hookExtra
* @return mixed Returns $input unaltered.
*/
public function setUpgradedPlugin($input, $hookExtra) {
if (!empty($hookExtra['plugin']) && is_string($hookExtra['plugin'])) {
$this->upgradedPluginFile = $hookExtra['plugin'];
} else {
$this->upgradedPluginFile = 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->upgradedPluginFile = $options['hook_extra']['plugin'];
} else {
$this->upgradedPluginFile = null;
}
return $options;
}
/**
* @access private
*
* @param mixed $input
* @return mixed Returns $input unaltered.
*/
public function clearUpgradedPlugin($input = null) {
$this->upgradedPluginFile = null;
return $input;
}
/**
* Get the details of the currently available update, if any.
*
* If no updates are available, or if the last known update version is below or equal
* to the currently installed version, this method will return NULL.
*
* Uses cached update data. To retrieve update information straight from
* the metadata URL, call requestUpdate() instead.
*
* @return PluginUpdate|null
*/
public function getUpdate() {
$state = $this->getUpdateState(); /** @var StdClass $state */
//Is there an update available insert?
if ( !empty($state) && isset($state->update) && !empty($state->update) ){
$update = $state->update;
//Check if the update is actually newer than the currently installed version.
$installedVersion = $this->getInstalledVersion();
if ( ($installedVersion !== null) && version_compare($update->version, $installedVersion, '>') ){
$update->filename = $this->pluginFile;
return $update;
}
}
return null;
}
/**
* Add a "Check for updates" link to the plugin row in the "Plugins" page. By default,
* the new link will appear after the "Visit plugin site" link.
*
* You can change the link text by using the "puc_manual_check_link-$slug" filter.
* Returning an empty string from the filter will disable the link.
*
* @param array $pluginMeta Array of meta links.
* @param string $pluginFile
* @return array
*/
public function addCheckForUpdatesLink($pluginMeta, $pluginFile) {
$isRelevant = ($pluginFile == $this->pluginFile)
|| (!empty($this->muPluginFile) && $pluginFile == $this->muPluginFile);
if ( $isRelevant && current_user_can('update_plugins') ) {
$linkUrl = wp_nonce_url(
add_query_arg(
array(
'puc_check_for_updates' => 1,
'puc_slug' => $this->slug,
),
is_network_admin() ? network_admin_url('plugins.php') : admin_url('plugins.php')
),
'puc_check_for_updates'
);
$linkText = apply_filters('puc_manual_check_link-' . $this->slug, 'Check for updates');
if ( !empty($linkText) ) {
$pluginMeta[] = sprintf('<a href="%s">%s</a>', esc_attr($linkUrl), $linkText);
}
}
return $pluginMeta;
}
/**
* Check for updates when the user clicks the "Check for updates" link.
* @see self::addCheckForUpdatesLink()
*
* @return void
*/
public function handleManualCheck() {
$shouldCheck =
isset($_GET['puc_check_for_updates'], $_GET['puc_slug'])
&& $_GET['puc_slug'] == $this->slug
&& current_user_can('update_plugins')
&& check_admin_referer('puc_check_for_updates');
if ( $shouldCheck ) {
$update = $this->checkForUpdates();
$status = ($update === null) ? 'no_update' : 'update_available';
wp_redirect(add_query_arg(
array(
'puc_update_check_result' => $status,
'puc_slug' => $this->slug,
),
is_network_admin() ? network_admin_url('plugins.php') : admin_url('plugins.php')
));
}
}
/**
* Display the results of a manual update check.
* @see self::handleManualCheck()
*
* You can change the result message by using the "puc_manual_check_message-$slug" filter.
*/
public function displayManualCheckResult() {
if ( isset($_GET['puc_update_check_result'], $_GET['puc_slug']) && ($_GET['puc_slug'] == $this->slug) ) {
$status = strval($_GET['puc_update_check_result']);
if ( $status == 'no_update' ) {
$message = 'This plugin is up to date.';
} else if ( $status == 'update_available' ) {
$message = 'A new version of this plugin is available.';
} else {
$message = sprintf('Unknown update checker status "%s"', htmlentities($status));
}
printf(
'<div class="updated"><p>%s</p></div>',
apply_filters('puc_manual_check_message-' . $this->slug, $message, $status)
);
}
}
/**
* Check if the plugin file is inside the mu-plugins directory.
*
* @return bool
*/
protected function isMuPlugin() {
static $cachedResult = null;
if ( $cachedResult === null ) {
//Convert both paths to the canonical form before comparison.
$muPluginDir = realpath(WPMU_PLUGIN_DIR);
$pluginPath = realpath($this->pluginAbsolutePath);
$cachedResult = (strpos($pluginPath, $muPluginDir) === 0);
}
return $cachedResult;
}
/**
* Clear the cached plugin version. This method can be set up as a filter (hook) and will
* return the filter argument unmodified.
*
* @param mixed $filterArgument
* @return mixed
*/
public function clearCachedVersion($filterArgument = null) {
$this->cachedInstalledVersion = null;
return $filterArgument;
}
/**
* Register a callback for filtering query arguments.
*
* The callback function should take one argument - an associative array of query arguments.
* It should return a modified array of query arguments.
*
* @uses add_filter() This method is a convenience wrapper for add_filter().
*
* @param callable $callback
* @return void
*/
public function addQueryArgFilter($callback){
add_filter('puc_request_info_query_args-'.$this->slug, $callback);
}
/**
* Register a callback for filtering arguments passed to wp_remote_get().
*
* The callback function should take one argument - an associative array of arguments -
* and return a modified array or arguments. See the WP documentation on wp_remote_get()
* for details on what arguments are available and how they work.
*
* @uses add_filter() This method is a convenience wrapper for add_filter().
*
* @param callable $callback
* @return void
*/
public function addHttpRequestArgFilter($callback){
add_filter('puc_request_info_options-'.$this->slug, $callback);
}
/**
* Register a callback for filtering the plugin info retrieved from the external API.
*
* The callback function should take two arguments. If the plugin info was retrieved
* successfully, the first argument passed will be an instance of PluginInfo. Otherwise,
* it will be NULL. The second argument will be the corresponding return value of
* wp_remote_get (see WP docs for details).
*
* The callback function should return a new or modified instance of PluginInfo or NULL.
*
* @uses add_filter() This method is a convenience wrapper for add_filter().
*
* @param callable $callback
* @return void
*/
public function addResultFilter($callback){
add_filter('puc_request_info_result-'.$this->slug, $callback, 10, 2);
}
/**
* Register a callback for one of the update checker filters.
*
* Identical to add_filter(), except it automatically adds the "puc_" prefix
* and the "-$plugin_slug" suffix to the filter name. For example, "request_info_result"
* becomes "puc_request_info_result-your_plugin_slug".
*
* @param string $tag
* @param callable $callback
* @param int $priority
* @param int $acceptedArgs
*/
public function addFilter($tag, $callback, $priority = 10, $acceptedArgs = 1) {
add_filter('puc_' . $tag . '-' . $this->slug, $callback, $priority, $acceptedArgs);
}
}
endif;
if ( !class_exists('PluginInfo_2_3', false) ):
/**
* A container class for holding and transforming various plugin metadata.
*
* @author Janis Elsts
* @copyright 2015
* @version 2.3
* @access public
*/
class PluginInfo_2_3 {
//Most fields map directly to the contents of the plugin's info.json file.
//See the relevant docs for a description of their meaning.
public $name;
public $slug;
public $version;
public $homepage;
public $sections;
public $banners;
public $download_url;
public $author;
public $author_homepage;
public $requires;
public $tested;
public $upgrade_notice;
public $rating;
public $num_ratings;
public $downloaded;
public $active_installs;
public $last_updated;
public $id = 0; //The native WP.org API returns numeric plugin IDs, but they're not used for anything.
public $filename; //Plugin filename relative to the plugins directory.
/**
* Create a new instance of PluginInfo from JSON-encoded plugin info
* returned by an external update API.
*
* @param string $json Valid JSON string representing plugin info.
* @param bool $triggerErrors
* @return PluginInfo|null New instance of PluginInfo, or NULL on error.
*/
public static function fromJson($json, $triggerErrors = false){
/** @var StdClass $apiResponse */
$apiResponse = json_decode($json);
if ( empty($apiResponse) || !is_object($apiResponse) ){
if ( $triggerErrors ) {
trigger_error(
"Failed to parse plugin metadata. Try validating your .json file with http://jsonlint.com/",
E_USER_NOTICE
);
}
return null;
}
//Very, very basic validation.
$valid = isset($apiResponse->name) && !empty($apiResponse->name) && isset($apiResponse->version) && !empty($apiResponse->version);
if ( !$valid ){
if ( $triggerErrors ) {
trigger_error(
"The plugin metadata file does not contain the required 'name' and/or 'version' keys.",
E_USER_NOTICE
);
}
return null;
}
$info = new self();
foreach(get_object_vars($apiResponse) as $key => $value){
$info->$key = $value;
}
return $info;
}
/**
* Transform plugin info into the format used by the native WordPress.org API
*
* @return object
*/
public function toWpFormat(){
$info = new StdClass;
//The custom update API is built so that many fields have the same name and format
//as those returned by the native WordPress.org API. These can be assigned directly.
$sameFormat = array(
'name', 'slug', 'version', 'requires', 'tested', 'rating', 'upgrade_notice',
'num_ratings', 'downloaded', 'active_installs', 'homepage', 'last_updated',
);
foreach($sameFormat as $field){
if ( isset($this->$field) ) {
$info->$field = $this->$field;
} else {
$info->$field = null;
}
}
//Other fields need to be renamed and/or transformed.
$info->download_link = $this->download_url;
if ( !empty($this->author_homepage) ){
$info->author = sprintf('<a href="%s">%s</a>', $this->author_homepage, $this->author);
} else {
$info->author = $this->author;
}
if ( is_object($this->sections) ){
$info->sections = get_object_vars($this->sections);
} elseif ( is_array($this->sections) ) {
$info->sections = $this->sections;
} else {
$info->sections = array('description' => '');
}
if ( !empty($this->banners) ) {
//WP expects an array with two keys: "high" and "low". Both are optional.
//Docs: https://wordpress.org/plugins/about/faq/#banners
$info->banners = is_object($this->banners) ? get_object_vars($this->banners) : $this->banners;
$info->banners = array_intersect_key($info->banners, array('high' => true, 'low' => true));
}
return $info;
}
}
endif;
if ( !class_exists('PluginUpdate_2_3', false) ):
/**
* A simple container class for holding information about an available update.
*
* @author Janis Elsts
* @copyright 2015
* @version 2.3
* @access public
*/
class PluginUpdate_2_3 {
public $id = 0;
public $slug;
public $version;
public $homepage;
public $download_url;
public $upgrade_notice;
public $filename; //Plugin filename relative to the plugins directory.
private static $fields = array('id', 'slug', 'version', 'homepage', 'download_url', 'upgrade_notice', 'filename');
/**
* Create a new instance of PluginUpdate from its JSON-encoded representation.
*
* @param string $json
* @param bool $triggerErrors
* @return PluginUpdate|null
*/
public static function fromJson($json, $triggerErrors = false){
//Since update-related information is simply a subset of the full plugin info,
//we can parse the update JSON as if it was a plugin info string, then copy over
//the parts that we care about.
$pluginInfo = PluginInfo_2_3::fromJson($json, $triggerErrors);
if ( $pluginInfo != null ) {
return self::fromPluginInfo($pluginInfo);
} else {
return null;
}
}
/**
* Create a new instance of PluginUpdate based on an instance of PluginInfo.
* Basically, this just copies a subset of fields from one object to another.
*
* @param PluginInfo $info
* @return PluginUpdate
*/
public static function fromPluginInfo($info){
return self::fromObject($info);
}
/**
* Create a new instance of PluginUpdate by copying the necessary fields from
* another object.
*
* @param StdClass|PluginInfo|PluginUpdate $object The source object.
* @return PluginUpdate The new copy.
*/
public static function fromObject($object) {
$update = new self();
$fields = self::$fields;
if (!empty($object->slug)) $fields = apply_filters('puc_retain_fields-'.$object->slug, $fields);
foreach($fields as $field){
if (property_exists($object, $field)) {
$update->$field = $object->$field;
}
}
return $update;
}
/**
* Create an instance of StdClass that can later be converted back to
* a PluginUpdate. Useful for serialization and caching, as it avoids
* the "incomplete object" problem if the cached value is loaded before
* this class.
*
* @return StdClass
*/
public function toStdClass() {
$object = new StdClass();
$fields = self::$fields;
if (!empty($this->slug)) $fields = apply_filters('puc_retain_fields-'.$this->slug, $fields);
foreach($fields as $field){
if (property_exists($this, $field)) {
$object->$field = $this->$field;
}
}
return $object;
}
/**
* Transform the update into the format used by WordPress native plugin API.
*
* @return object
*/
public function toWpFormat(){
$update = new StdClass;
$update->id = $this->id;
$update->slug = $this->slug;
$update->new_version = $this->version;
$update->url = $this->homepage;
$update->package = $this->download_url;
$update->plugin = $this->filename;
if ( !empty($this->upgrade_notice) ){
$update->upgrade_notice = $this->upgrade_notice;
}
return $update;
}
}
endif;
if ( !class_exists('PucFactory', false) ):
/**
* A factory that builds instances of other classes from this library.
*
* When multiple versions of the same class have been loaded (e.g. PluginUpdateChecker 1.2
* and 1.3), this factory will always use the latest available version. Register class
* versions by calling {@link PucFactory::addVersion()}.
*
* At the moment it can only build instances of the PluginUpdateChecker class. Other classes
* are intended mainly for internal use and refer directly to specific implementations. If you
* want to instantiate one of them anyway, you can use {@link PucFactory::getLatestClassVersion()}
* to get the class name and then create it with <code>new $class(...)</code>.
*/
class PucFactory {
protected static $classVersions = array();
protected static $sorted = false;
/**
* Create a new instance of PluginUpdateChecker.
*
* @see PluginUpdateChecker::__construct()
*
* @param $metadataUrl
* @param $pluginFile
* @param string $slug
* @param int $checkPeriod
* @param string $optionName
* @param string $muPluginFile
* @return PluginUpdateChecker
*/
public static function buildUpdateChecker($metadataUrl, $pluginFile, $slug = '', $checkPeriod = 12, $optionName = '', $muPluginFile = '') {
$class = self::getLatestClassVersion('PluginUpdateChecker');
return new $class($metadataUrl, $pluginFile, $slug, $checkPeriod, $optionName, $muPluginFile);
}
/**
* Get the specific class name for the latest available version of a class.
*
* @param string $class
* @return string|null
*/
public static function getLatestClassVersion($class) {
if ( !self::$sorted ) {
self::sortVersions();
}
if ( isset(self::$classVersions[$class]) ) {
return reset(self::$classVersions[$class]);
} else {
return null;
}
}
/**
* Sort available class versions in descending order (i.e. newest first).
*/
protected static function sortVersions() {
foreach ( self::$classVersions as $class => $versions ) {
uksort($versions, array(__CLASS__, 'compareVersions'));
self::$classVersions[$class] = $versions;
}
self::$sorted = true;
}
protected static function compareVersions($a, $b) {
return -version_compare($a, $b);
}
/**
* Register a version of a class.
*
* @access private This method is only for internal use by the library.
*
* @param string $generalClass Class name without version numbers, e.g. 'PluginUpdateChecker'.
* @param string $versionedClass Actual class name, e.g. 'PluginUpdateChecker_1_2'.
* @param string $version Version number, e.g. '1.2'.
*/
public static function addVersion($generalClass, $versionedClass, $version) {
if ( !isset(self::$classVersions[$generalClass]) ) {
self::$classVersions[$generalClass] = array();
}
self::$classVersions[$generalClass][$version] = $versionedClass;
self::$sorted = false;
}
}
endif;
//Register classes defined in this file with the factory.
PucFactory::addVersion('PluginUpdateChecker', 'PluginUpdateChecker_2_3', '2.3');
PucFactory::addVersion('PluginUpdate', 'PluginUpdate_2_3', '2.3');
PucFactory::addVersion('PluginInfo', 'PluginInfo_2_3', '2.3');
/**
* Create non-versioned variants of the update checker classes. This allows for backwards
* compatibility with versions that did not use a factory, and it simplifies doc-comments.
*/
if ( !class_exists('PluginUpdateChecker', false) ) {
class PluginUpdateChecker extends PluginUpdateChecker_2_3 { }
}
if ( !class_exists('PluginUpdate', false) ) {
class PluginUpdate extends PluginUpdate_2_3 {}
}
if ( !class_exists('PluginInfo', false) ) {
class PluginInfo extends PluginInfo_2_3 {}
}