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- <?php
- namespace OC\Hooks;
- trait EmitterTrait {
-
- protected $listeners = [];
-
- public function listen($scope, $method, callable $callback) {
- $eventName = $scope . '::' . $method;
- if (!isset($this->listeners[$eventName])) {
- $this->listeners[$eventName] = [];
- }
- if (!in_array($callback, $this->listeners[$eventName], true)) {
- $this->listeners[$eventName][] = $callback;
- }
- }
-
- public function removeListener($scope = null, $method = null, callable $callback = null) {
- $names = [];
- $allNames = array_keys($this->listeners);
- if ($scope and $method) {
- $name = $scope . '::' . $method;
- if (isset($this->listeners[$name])) {
- $names[] = $name;
- }
- } elseif ($scope) {
- foreach ($allNames as $name) {
- $parts = explode('::', $name, 2);
- if ($parts[0] == $scope) {
- $names[] = $name;
- }
- }
- } elseif ($method) {
- foreach ($allNames as $name) {
- $parts = explode('::', $name, 2);
- if ($parts[1] == $method) {
- $names[] = $name;
- }
- }
- } else {
- $names = $allNames;
- }
- foreach ($names as $name) {
- if ($callback) {
- $index = array_search($callback, $this->listeners[$name], true);
- if ($index !== false) {
- unset($this->listeners[$name][$index]);
- }
- } else {
- $this->listeners[$name] = [];
- }
- }
- }
-
- protected function emit($scope, $method, array $arguments = []) {
- $eventName = $scope . '::' . $method;
- if (isset($this->listeners[$eventName])) {
- foreach ($this->listeners[$eventName] as $callback) {
- call_user_func_array($callback, $arguments);
- }
- }
- }
- }
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