Merge branch '4.6RC'4.6

1 files changed, 264 insertions, 0 deletions

diff --git a/vendor/sabre/event/lib/WildcardEmitterTrait.php b/vendor/sabre/event/lib/WildcardEmitterTrait.php
new file mode 100644
index 000000000..7d8d62c26
--- /dev/null
+++ b/vendor/sabre/event/lib/WildcardEmitterTrait.php
@@ -0,0 +1,264 @@
+<?php declare (strict_types=1);
+
+namespace Sabre\Event;
+
+/**
+ * Wildcard Emitter Trait
+ *
+ * This trait provides the implementation for WildCardEmitter
+ * Refer to that class for the full documentation about this
+ * trait.
+ *
+ * Normally you can just instantiate that class, but if you want to add
+ * emitter functionality to existing classes, using the trait might be a
+ * better way to do this.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+trait WildcardEmitterTrait {
+
+    /**
+     * Subscribe to an event.
+     *
+     * @return void
+     */
+    function on(string $eventName, callable $callBack, int $priority = 100) {
+
+        // If it ends with a wildcard, we use the wildcardListeners array 
+        if ($eventName[\strlen($eventName) - 1] === '*') {
+            $eventName = \substr($eventName, 0, -1);
+            $listeners = & $this->wildcardListeners;
+        } else {
+            $listeners = & $this->listeners;
+        }
+
+        // Always fully reset the listener index. This is fairly sane for most
+        // applications, because there's a clear "event registering" and "event
+        // emitting" phase, but can be slow if there's a lot adding and removing
+        // of listeners during emitting of events.
+        $this->listenerIndex = [];
+
+        if (!isset($listeners[$eventName])) {
+            $listeners[$eventName] = [];
+        }
+        $listeners[$eventName][] = [$priority, $callBack];
+
+    }
+
+    /**
+     * Subscribe to an event exactly once.
+     *
+     * @return void
+     */
+    function once(string $eventName, callable $callBack, int $priority = 100) {
+
+        $wrapper = null;
+        $wrapper = function() use ($eventName, $callBack, &$wrapper) {
+
+            $this->removeListener($eventName, $wrapper);
+            return \call_user_func_array($callBack, \func_get_args());
+
+        };
+
+        $this->on($eventName, $wrapper, $priority);
+
+    }
+
+    /**
+     * Emits an event.
+     *
+     * This method will return true if 0 or more listeners were succesfully
+     * handled. false is returned if one of the events broke the event chain.
+     *
+     * If the continueCallBack is specified, this callback will be called every
+     * time before the next event handler is called.
+     *
+     * If the continueCallback returns false, event propagation stops. This
+     * allows you to use the eventEmitter as a means for listeners to implement
+     * functionality in your application, and break the event loop as soon as
+     * some condition is fulfilled.
+     *
+     * Note that returning false from an event subscriber breaks propagation
+     * and returns false, but if the continue-callback stops propagation, this
+     * is still considered a 'successful' operation and returns true.
+     *
+     * Lastly, if there are 5 event handlers for an event. The continueCallback
+     * will be called at most 4 times.
+     */
+    function emit(string $eventName, array $arguments = [], callable $continueCallBack = null) : bool {
+
+        if (\is_null($continueCallBack)) {
+
+            foreach ($this->listeners($eventName) as $listener) {
+
+                $result = \call_user_func_array($listener, $arguments);
+                if ($result === false) {
+                    return false;
+                }
+            }
+
+        } else {
+
+            $listeners = $this->listeners($eventName);
+            $counter = \count($listeners);
+
+            foreach ($listeners as $listener) {
+
+                $counter--;
+                $result = \call_user_func_array($listener, $arguments);
+                if ($result === false) {
+                    return false;
+                }
+
+                if ($counter > 0) {
+                    if (!$continueCallBack()) break;
+                }
+
+            }
+
+        }
+
+        return true;
+
+
+    }
+
+    /**
+     * Returns the list of listeners for an event.
+     *
+     * The list is returned as an array, and the list of events are sorted by
+     * their priority.
+     *
+     * @return callable[]
+     */
+    function listeners(string $eventName) : array {
+
+        if (!\array_key_exists($eventName, $this->listenerIndex)) {
+
+            // Create a new index.
+            $listeners = [];
+            $listenersPriority = [];
+            if (isset($this->listeners[$eventName])) foreach ($this->listeners[$eventName] as $listener) {
+
+                $listenersPriority[] = $listener[0];
+                $listeners[] = $listener[1];
+
+            }
+
+            foreach ($this->wildcardListeners as $wcEvent => $wcListeners) {
+
+                // Wildcard match
+                if (\substr($eventName, 0, \strlen($wcEvent)) === $wcEvent) {
+
+                    foreach ($wcListeners as $listener) {
+
+                        $listenersPriority[] = $listener[0];
+                        $listeners[] = $listener[1];
+
+                    }
+
+                }
+
+            }
+
+            // Sorting by priority
+            \array_multisort($listenersPriority, SORT_NUMERIC, $listeners);
+
+            // Creating index
+            $this->listenerIndex[$eventName] = $listeners;
+
+        }
+
+        return $this->listenerIndex[$eventName];
+
+    }
+
+    /**
+     * Removes a specific listener from an event.
+     *
+     * If the listener could not be found, this method will return false. If it
+     * was removed it will return true.
+     */
+    function removeListener(string $eventName, callable $listener) : bool {
+
+        // If it ends with a wildcard, we use the wildcardListeners array 
+        if ($eventName[\strlen($eventName) - 1] === '*') {
+            $eventName = \substr($eventName, 0, -1);
+            $listeners = & $this->wildcardListeners;
+        } else {
+            $listeners = & $this->listeners;
+        }
+
+        if (!isset($listeners[$eventName])) {
+            return false;
+        }
+
+        foreach ($listeners[$eventName] as $index => $check) {
+
+            if ($check[1] === $listener) {
+
+                // Remove listener
+                unset($listeners[$eventName][$index]);
+                // Reset index
+                $this->listenerIndex = [];
+                return true;
+
+            }
+
+        }
+
+        return false;
+
+    }
+
+    /**
+     * Removes all listeners.
+     *
+     * If the eventName argument is specified, all listeners for that event are
+     * removed. If it is not specified, every listener for every event is
+     * removed.
+     *
+     * @return void
+     */
+    function removeAllListeners(string $eventName = null) {
+
+        if (\is_null($eventName)) {
+            $this->listeners = [];
+            $this->wildcardListeners = [];
+
+        } else {
+
+            if ($eventName[\strlen($eventName) - 1] === '*') {
+                // Wildcard event
+                unset($this->wildcardListeners[\substr($eventName, 0, -1)]);
+            } else {
+                unset($this->listeners[$eventName]);
+            }
+
+        }
+
+        // Reset index
+        $this->listenerIndex = [];
+
+    }
+
+    /**
+     * The list of listeners
+     */
+    protected $listeners = [];
+
+    /**
+     * The list of "wildcard listeners". 
+     */
+    protected $wildcardListeners = [];
+
+    /**
+     * An index of listeners for a specific event name. This helps speeding
+     * up emitting events after all listeners have been set.
+     *
+     * If the list of listeners changes though, the index clears.
+     */
+    protected $listenerIndex = [];
+}