add initial crates and apps

crates/chattyness-db/src/ws_messages.rs

@@ -0,0 +1,92 @@
+//! WebSocket message protocol for channel presence.
+//!
+//! Shared message types used by both server and WASM client.
+
+use serde::{Deserialize, Serialize};
+use uuid::Uuid;
+
+use crate::models::{ChannelMemberInfo, ChannelMemberWithAvatar};
+
+/// Client-to-server WebSocket messages.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(tag = "type", rename_all = "snake_case")]
+pub enum ClientMessage {
+    /// Update position in the channel.
+    UpdatePosition {
+        /// X coordinate in scene space.
+        x: f64,
+        /// Y coordinate in scene space.
+        y: f64,
+    },
+
+    /// Update emotion (0-9).
+    UpdateEmotion {
+        /// Emotion slot (0-9, keyboard: e0-e9).
+        emotion: u8,
+    },
+
+    /// Ping to keep connection alive.
+    Ping,
+}
+
+/// Server-to-client WebSocket messages.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(tag = "type", rename_all = "snake_case")]
+pub enum ServerMessage {
+    /// Welcome message with initial state after connection.
+    Welcome {
+        /// This user's member info.
+        member: ChannelMemberInfo,
+        /// All current members with avatars.
+        members: Vec<ChannelMemberWithAvatar>,
+    },
+
+    /// A member joined the channel.
+    MemberJoined {
+        /// The member that joined.
+        member: ChannelMemberWithAvatar,
+    },
+
+    /// A member left the channel.
+    MemberLeft {
+        /// User ID (if authenticated user).
+        user_id: Option<Uuid>,
+        /// Guest session ID (if guest).
+        guest_session_id: Option<Uuid>,
+    },
+
+    /// A member updated their position.
+    PositionUpdated {
+        /// User ID (if authenticated user).
+        user_id: Option<Uuid>,
+        /// Guest session ID (if guest).
+        guest_session_id: Option<Uuid>,
+        /// New X coordinate.
+        x: f64,
+        /// New Y coordinate.
+        y: f64,
+    },
+
+    /// A member changed their emotion.
+    EmotionUpdated {
+        /// User ID (if authenticated user).
+        user_id: Option<Uuid>,
+        /// Guest session ID (if guest).
+        guest_session_id: Option<Uuid>,
+        /// New emotion slot (0-9).
+        emotion: u8,
+        /// Asset paths for all 9 positions of the new emotion layer.
+        emotion_layer: [Option<String>; 9],
+    },
+
+    /// Pong response to client ping.
+    Pong,
+
+    /// Error message.
+    Error {
+        /// Error code.
+        code: String,
+        /// Error message.
+        message: String,
+    },
+}