1 files changed, 75 insertions, 0 deletions
diff --git a/games/rstnode/rst-core/src/wire/game/update.rs b/games/rstnode/rst-core/src/wire/game/update.rs
new file mode 100644
index 000000000000..44a2e646bd34
--- /dev/null
+++ b/games/rstnode/rst-core/src/wire/game/update.rs
@@ -0,0 +1,75 @@
+//! Update to the game state
+
+use crate::{
+    data::{NodeId, PacketId, Player, Upgrade},
+    wire::UserId,
+};
+use serde::{Deserialize, Serialize};
+
+/// An update provided by the game server
+#[derive(Clone, Serialize, Deserialize)]
+pub enum Update {
+    /// Update made to a node
+    Node(NodeUpdate),
+    /// Update made to a link
+    Link(LinkUpdate),
+    /// Update made to a packet
+    Packet(PacketUpdate),
+    /// Update made to the user set
+    User(UserUpdate),
+    /// An error occured, can be non-fatal
+    Error(UpdateError),
+}
+
+/// Update made to a node
+#[derive(Clone, Serialize, Deserialize)]
+pub enum NodeUpdate {
+    /// The node owner changed
+    Owner(Player),
+    /// Represent a new upgrade state
+    Level { node: NodeId, new: Upgrade },
+    /// A new packet was consumed from a link
+    NewPacket(PacketId),
+    /// Remove a packet from the node buffer
+    SentPacket(PacketId),
+    /// Dropped a packet
+    DropPacket(PacketId),
+}
+
+/// Update made to a link
+#[derive(Clone, Serialize, Deserialize)]
+pub enum LinkUpdate {
+    /// Take a packet from a node's buffer
+    TakePacket(PacketId),
+    /// Give a packet to a node's buffer
+    GivePacket(PacketId),
+}
+
+/// Update made to a packet
+#[derive(Clone, Serialize, Deserialize)]
+pub enum PacketUpdate {
+    /// Advance a packet along one step along the link
+    Increment(PacketId),
+}
+
+/// Update made to the user set
+#[derive(Clone, Serialize, Deserialize)]
+pub enum UserUpdate {
+    UserLeft(UserId),
+    UserPaused(UserId),
+}
+
+/// An error occured, can be non-fatal
+#[derive(Clone, Serialize, Deserialize)]
+pub enum UpdateError {
+    /// You are the last user in the match
+    LastUser,
+    /// The game crashed, so kick all
+    GameCrashed,
+    /// The server's time was behind the client time
+    ///
+    /// This means that newer events will be dropped from the map
+    /// state.  This should prompt the client to warn the user this
+    /// has happened, then resync the time of the game states.
+    TimeAheadServer,
+}