Add delete_message_reactions + register event

Add the `delete_message_reactions` endpoint
(`DELETE /channels/{}/messages/{}/reactions`) and implement a method on
the `Message` struct for easy access, `delete_reactions`.

Register the `MESSAGE_REACTION_REMOVE_ALL` event and add an event
handler.

1 files changed, 10 insertions, 0 deletions

diff --git a/src/client/mod.rs b/src/client/mod.rs
index 77ec3e1..4db7a4e 100644
--- a/src/client/mod.rs
+++ b/src/client/mod.rs
@@ -713,6 +713,16 @@ impl Client {
             .on_reaction_remove = Some(Arc::new(handler))
     }
 
+    /// Attached a handler for when a [`ReactionRemoveAll`] is received.
+    ///
+    /// [`ReactionRemoveAll`]: ../model/enum.Event.html#variant.ReactionRemoveAll
+    pub fn on_reaction_remove_all<F>(&mut self, handler: F)
+        where F: Fn(Context, ChannelId, MessageId) + Send + Sync + 'static {
+        self.event_store.lock()
+            .unwrap()
+            .on_reaction_remove_all = Some(Arc::new(handler))
+    }
+
     /// Register an event to be called whenever a Ready event is received.
     ///
     /// Registering a handler for the ready event is good for noting when your