/**
* Loads plugins.
*
* The method checks dependences and plugin availability before loading and
* invokes PluginInterface::run() after loading.
*
* @param array $configs List of plugins' configurations. Each key is a
* plugin name and each value is a configurations array.
*
* @see \Mibew\Plugin\PluginInterface::run()
*/
public function loadPlugins($configs)
{
// Builds Dependency graph with available plugins.
$graph = new DependencyGraph();
foreach (State::loadAllEnabled() as $plugin_state) {
if (!PluginUtils::pluginExists($plugin_state->pluginName)) {
trigger_error(sprintf('Plugin "%s" exists in database base but is not found in file system!', $plugin_state->pluginName), E_USER_WARNING);
continue;
}
$plugin_info = PluginInfo::fromState($plugin_state);
if ($plugin_info->needsUpdate()) {
trigger_error(sprintf('Update "%s" plugin before use it!', $plugin_info->getName()), E_USER_WARNING);
continue;
}
if ($plugin_info->hasUnsatisfiedSystemRequirements()) {
trigger_error(sprintf('Plugin "%s" has unsatisfied system requirements!', $plugin_info->getName()), E_USER_WARNING);
continue;
}
$graph->addPlugin($plugin_info);
}
$offset = 0;
$running_queue = array();
foreach ($graph->getLoadingQueue() as $plugin_info) {
// Make sure all depedendencies are loaded
foreach (array_keys($plugin_info->getDependencies()) as $dependency) {
if (!isset($this->loadedPlugins[$dependency])) {
trigger_error(sprintf('Plugin "%s" was not loaded yet, but exists in "%s" dependencies list!', $dependency, $plugin_info->getName()), E_USER_WARNING);
continue 2;
}
}
// Try to load the plugin.
$name = $plugin_info->getName();
$config = isset($configs[$name]) ? $configs[$name] : array();
$instance = $plugin_info->getInstance($config);
if ($instance->initialized()) {
// Store the plugin and add it to running queue
$this->loadedPlugins[$name] = $instance;
$running_queue[$instance->getWeight() . "_" . $offset] = $instance;
$offset++;
} else {
// The plugin cannot be loaded. Just skip it.
trigger_error("Plugin '{$name}' was not initialized correctly!", E_USER_WARNING);
}
}
// Sort queue in order to plugins' weights and run plugins one by one
uksort($running_queue, 'strnatcmp');
foreach ($running_queue as $plugin) {
$plugin->run();
}
}