Check user is host for host-broadcasted project messages

crates/rpc/src/macros.rs

@@ -60,8 +60,10 @@ macro_rules! request_messages {
 
 #[macro_export]
 macro_rules! entity_messages {
-    ($id_field:ident, $($name:ident),* $(,)?) => {
+    ({$id_field:ident, $entity_type:ty}, $($name:ident),* $(,)?) => {
         $(impl EntityMessage for $name {
+            type Entity = $entity_type;
+
             fn remote_entity_id(&self) -> u64 {
                 self.$id_field
             }

crates/rpc/src/proto.rs

@@ -31,6 +31,7 @@ pub trait EnvelopedMessage: Clone + Debug + Serialize + Sized + Send + Sync + 's
 }
 
 pub trait EntityMessage: EnvelopedMessage {
+    type Entity;
     fn remote_entity_id(&self) -> u64;
 }
 
@@ -369,7 +370,7 @@ request_messages!(
 );
 
 entity_messages!(
-    project_id,
+    {project_id, ShareProject},
     AddProjectCollaborator,
     ApplyCodeAction,
     ApplyCompletionAdditionalEdits,
@@ -422,7 +423,7 @@ entity_messages!(
 );
 
 entity_messages!(
-    channel_id,
+    {channel_id, Channel},
     ChannelMessageSent,
     RemoveChannelMessage,
     UpdateChannelBuffer,