feat: Websocket error macro

`ws_errors` macro to make adding new errors easy

Signed-off-by: Awiteb <a@4rs.nl>

crates/oxidetalis/src/macros.rs

@@ -0,0 +1,59 @@
+// OxideTalis Messaging Protocol homeserver implementation
+// Copyright (C) 2024 OxideTalis Developers <otmp@4rs.nl>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see <https://gnu.org/licenses/agpl-3.0>.
+
+//! OxideTalis server macros, to make the code more readable and easier to
+//! write.
+
+/// Macro to create the `WsError` enum with the given error names and reasons.
+///
+/// ## Example
+/// ```rust,ignore
+/// ws_errors! {
+///    FirstError = "This is the first error",
+///    SecondError = "This is the second error",
+/// }
+/// ```
+#[macro_export]
+macro_rules! ws_errors {
+    ($($name:ident = $reason:tt),+ $(,)?) => {
+        #[derive(Debug)]
+        #[doc = "Websocket errors, returned in the websocket communication"]
+        pub enum WsError {
+            $(
+                #[doc = $reason]
+                $name
+            ),+
+        }
+        impl WsError {
+            #[doc = "Returns error name"]
+            pub const fn name(&self) -> &'static str {
+                match self {
+                    $(
+                        WsError::$name => stringify!($name)
+                    ),+
+                }
+            }
+            #[doc = "Returns the error reason"]
+            pub const fn reason(&self) -> &'static str {
+                match self {
+                    $(
+                        WsError::$name => $reason
+                    ),+
+                }
+            }
+        }
+    };
+}

crates/oxidetalis/src/main.rs

@@ -26,6 +26,7 @@ use salvo::{conn::TcpListener, Listener, Server};
 mod database;
 mod errors;
 mod extensions;
+mod macros;
 mod middlewares;
 mod nonce;
 mod routes;

crates/oxidetalis/src/websocket/errors.rs

@@ -16,42 +16,14 @@
 
 //! Websocket errors
 
+use crate::ws_errors;
+
 /// Result type of websocket
 pub type WsResult<T> = Result<T, WsError>;
 
-/// Websocket errors, returned in the websocket communication
-#[derive(Debug)]
-pub enum WsError {
-    /// The signature is invalid
-    InvalidSignature,
-    /// Message type must be text
-    NotTextMessage,
-    /// Invalid json data
-    InvalidJsonData,
-    /// Unknown client event
-    UnknownClientEvent,
-}
-
-impl WsError {
-    /// Returns error name
-    pub const fn name(&self) -> &'static str {
-        match self {
-            WsError::InvalidSignature => "InvalidSignature",
-            WsError::NotTextMessage => "NotTextMessage",
-            WsError::InvalidJsonData => "InvalidJsonData",
-            WsError::UnknownClientEvent => "UnknownClientEvent",
-        }
-    }
-
-    /// Returns the error reason
-    pub const fn reason(&self) -> &'static str {
-        match self {
-            WsError::InvalidSignature => "Invalid event signature",
-            WsError::NotTextMessage => "The websocket message must be text message",
-            WsError::InvalidJsonData => "Received invalid json data, the text must be valid json",
-            WsError::UnknownClientEvent => {
-                "Unknown client event, the event is not recognized by the server"
-            }
-        }
-    }
+ws_errors! {
+    InvalidSignature = "Invalid event signature",
+    NotTextMessage = "The websocket message must be text message",
+    InvalidJsonData = "Received invalid json data, the text must be valid json",
+    UnknownClientEvent = "Unknown client event, the event is not recognized by the server",
 }