Add MessageInfo

Signed-off-by: Patrick José Pereira <[email protected]>

build/parser.rs

@@ -289,6 +289,7 @@ impl MessageDefinition {
             })
             .collect();
 
+        let id = self.id;
         quote! {
             #[derive(Debug, Clone, PartialEq, Default)]
             #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
@@ -312,6 +313,12 @@ impl MessageDefinition {
                     }
                 }
             }
+
+            impl MessageInfo for #struct_name {
+                fn id() -> u16 {
+                    #id
+                }
+            }
         }
     }
 }
@@ -454,6 +461,7 @@ pub fn generate<R: Read, W: Write>(input: &mut R, output_rust: &mut W) {
     let ping_message = emit_ping_message(messages);
 
     let code = quote! {
+        use crate::message::MessageInfo;
         use crate::message::PingMessage;
         use crate::message::SerializePayload;
         use crate::message::DeserializePayload;

src/message.rs

@@ -141,6 +141,10 @@ pub trait DeserializePayload {
     fn deserialize(payload: &[u8]) -> Self;
 }
 
+pub trait MessageInfo {
+    fn id() -> u16;
+}
+
 pub trait DeserializeGenericMessage
 where
     Self: Sized,