feat: add state version to State

Cargo.lock

@@ -120,6 +120,7 @@ dependencies = [
  "serde",
  "serde_json",
  "server_fn",
+ "smart-default",
  "tokio",
  "tower 0.4.13",
  "tower-http 0.5.2",
@@ -2333,6 +2334,17 @@ version = "1.13.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3c5e1a9a646d36c3599cd173a41282daf47c44583ad367b8e6837255952e5c67"
 
+[[package]]
+name = "smart-default"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0eb01866308440fc64d6c44d9e86c5cc17adfe33c4d6eed55da9145044d0ffc1"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "socket2"
 version = "0.5.8"

crates/ascend/Cargo.toml

@@ -34,6 +34,7 @@ tracing-subscriber-wasm = "0.1.0"
 ron = { version = "0.8" }
 rand = { version = "0.8", optional = true }
 web-sys = { version = "0.3.76", features = ["File", "FileList"] }
+smart-default = "0.7.1"
 
 [dev-dependencies.serde_json]
 version = "1"

crates/ascend/src/server.rs

@@ -43,11 +43,14 @@ pub mod cli {
 pub mod state {
     //! Server state
 
+    const STATE_VERSION: u64 = 1;
+
     use super::persistence::Persistent;
     use crate::models;
     use crate::models::Wall;
     use serde::Deserialize;
     use serde::Serialize;
+    use smart_default::SmartDefault;
     use std::collections::BTreeSet;
 
     #[derive(Clone, Debug)]
@@ -55,8 +58,12 @@ pub mod state {
         pub persistent: Persistent<PersistentState>,
     }
 
-    #[derive(Serialize, Deserialize, Clone, Debug, Default)]
+    #[derive(Serialize, Deserialize, Clone, Debug, SmartDefault)]
     pub struct PersistentState {
+        /// State schema version
+        #[default(STATE_VERSION)]
+        pub version: u64,
+
         pub wall: Wall,
         pub problems: Problems,
     }