/**
* Retrieves info about plugins available in the system.
*
* @return array Associative array of plugins info. Each key of the array is
* fully qualified plugin's name and each value is an array with the
* fillowing keys:
* - "version": string, version of the plugin which presents in the system.
* - "installed": boolean, indicates if the plugin is installed.
* - "enabled": boolean, indicates if the plugin is enabled.
*/
protected function getPluginsInfo()
{
if (is_null($this->pluginsInfo)) {
$this->pluginsInfo = [];
$names = PluginUtils::discoverPlugins();
foreach ($names as $plugin_name) {
$info = new PluginInfo($plugin_name);
$this->pluginsInfo[$plugin_name] = array('version' => $info->getVersion(), 'installed' => $info->getState()->installed, 'enabled' => $info->getState()->enabled);
}
}
return $this->pluginsInfo;
}
/**
* Gets string representation of the current plugin state.
*
* @param PluginInfo $plugin Plugin to get state for.
* @return string Human readable representation of plugin's state.
*/
protected function getPluginState(PluginInfo $plugin)
{
if (!$plugin->isEnabled()) {
// The plugin is just disabled
return getlocal('disabled');
}
if (PluginManager::getInstance()->hasPlugin($plugin->getName())) {
// The plugin is enabled and works well
return getlocal('working');
}
// The plugin is enabled but something is wrong.
if ($plugin->needsUpdate()) {
// The plugin is not working because it needs to be updated.
return getlocal('needs update');
}
// Actually we do not know why the plugin does not work. The only thing
// that can be said is the plugin was not initialized correctly by some
// reasons.
return getlocal('not initialized');
}
/**
* Sets state related with depth-first search algorithm for a plugin.
*
* @param PluginInfo $plugin A plugin for which the state should be set.
* @param string $state One of DependencyGraph::DFS_* constants.
*/
protected function setDfsState(PluginInfo $plugin, $state)
{
$this->dfsState[$plugin->getName()] = $state;
}
/**
* Checks if the plugin can be updated.
*
* @return boolean
*/
public function canBeUpdated()
{
if (!$this->needsUpdate()) {
return false;
}
foreach (array_keys($this->getDependencies()) as $dependency_name) {
$dependency = new PluginInfo($dependency_name);
if ($dependency->needsUpdate()) {
return false;
}
}
return true;
}
/**
* Tries to update a plugin.
*
* @param string $plugin_name Name of the plugin to update.
* @return boolean Indicates if the plugin has been updated or not.
*/
public function update($plugin_name)
{
$plugin = new PluginInfo($plugin_name);
if (!$plugin->needsUpdate()) {
// There is no need to update the plugin
return true;
}
if (!$plugin->canBeUpdated()) {
// The plugin cannot be updated.
return false;
}
try {
// Perform incremental updates
$updates = MaintenanceUtils::getUpdates($plugin->getClass());
foreach ($updates as $version => $method) {
// Skip updates to lower versions.
if (version_compare($version, $plugin->getInstalledVersion()) <= 0) {
continue;
}
// Skip updates to versions that greater then the current plugin
// version.
if (version_compare($version, $plugin->getVersion()) > 0) {
break;
}
// Run the update
if (!$method()) {
// By some reasons we cannot update to the next version.
// Stop the process here.
return false;
}
// Store new version number in the database. With this info
// we can rerun the updating process if one of pending
// updates fails.
$plugin->getState()->version = $version;
$plugin->getState()->save();
}
} catch (\Exception $e) {
// Something went wrong
trigger_error(sprintf('Update of "%s" plugin failed: %s', $plugin->getName(), $e->getMessage()), E_USER_WARNING);
return false;
}
// All updates are done. Make sure the state of the plugin contains
// current plugin version.
$plugin->getState()->version = $plugin->getVersion();
$plugin->getState()->save();
return true;
}