Squashed diff from mh-backend-shard

backend/shared/src/shard.rs

@@ -0,0 +1,38 @@
+use std::net::Ipv4Addr;
+
+use crate::ws::MuteReason;
+use crate::node::Payload;
+use crate::types::{NodeId, NodeDetails};
+use serde::{Deserialize, Serialize};
+
+/// Alias for the ID of the node connection
+pub type ShardConnId = u32;
+
+/// Message sent from the shard to the backend core
+#[derive(Deserialize, Serialize, Debug)]
+pub enum ShardMessage {
+    /// Get a connection id for a new node, passing IPv4
+    AddNode {
+    	ip: Option<Ipv4Addr>,
+    	node: NodeDetails,
+    	sid: ShardConnId,
+    },
+    /// Send a message payload for a given node
+    UpdateNode {
+        nid: NodeId,
+        payload: Payload,
+    },
+}
+
+/// Message sent form the backend core to the shard
+#[derive(Deserialize, Serialize, Debug)]
+pub enum BackendMessage {
+	Initialize {
+		sid: ShardConnId,
+		nid: NodeId,
+	},
+	Mute {
+		sid: ShardConnId,
+		reason: MuteReason,
+	},
+}