write game loop with effect

.envrc

@@ -0,0 +1 @@
+  use flake

.gitignore

@@ -33,3 +33,4 @@ report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
 # Finder (MacOS) folder config
 .DS_Store
 *.sqlite
+.direnv/

.prettierrc.json

@@ -0,0 +1,2 @@
+{
+}

CLAUDE.md

@@ -109,3 +109,9 @@ bun --hot ./index.ts
 ```
 
 For more information, read the Bun API docs in `node_modules/bun-types/docs/**.mdx`.
+
+## Learning about "effect"
+
+The source code is available at `.repos/effect`
+
+Use this instead of node_modules

db.ts

@@ -14,27 +14,36 @@ db.exec(`
 `);
 
 export function saveRound(round: RoundState) {
-  const insert = db.prepare("INSERT INTO rounds (num, data) VALUES ($num, $data)");
+  const insert = db.prepare(
+    "INSERT INTO rounds (num, data) VALUES ($num, $data)",
+  );
   insert.run({ $num: round.num, $data: JSON.stringify(round) });
 }
 
 export function getRounds(page: number = 1, limit: number = 10) {
   const offset = (page - 1) * limit;
-  const countQuery = db.query("SELECT COUNT(*) as count FROM rounds").get() as { count: number };
-  const rows = db.query("SELECT data FROM rounds ORDER BY num DESC, id DESC LIMIT $limit OFFSET $offset")
+  const countQuery = db.query("SELECT COUNT(*) as count FROM rounds").get() as {
+    count: number;
+  };
+  const rows = db
+    .query(
+      "SELECT data FROM rounds ORDER BY num DESC, id DESC LIMIT $limit OFFSET $offset",
+    )
     .all({ $limit: limit, $offset: offset }) as { data: string }[];
   return {
-    rounds: rows.map(r => JSON.parse(r.data) as RoundState),
+    rounds: rows.map((r) => JSON.parse(r.data) as RoundState),
     total: countQuery.count,
     page,
     limit,
-    totalPages: Math.ceil(countQuery.count / limit)
+    totalPages: Math.ceil(countQuery.count / limit),
   };
 }
 
 export function getAllRounds() {
-  const rows = db.query("SELECT data FROM rounds ORDER BY num ASC, id ASC").all() as { data: string }[];
-  return rows.map(r => JSON.parse(r.data) as RoundState);
+  const rows = db
+    .query("SELECT data FROM rounds ORDER BY num ASC, id ASC")
+    .all() as { data: string }[];
+  return rows.map((r) => JSON.parse(r.data) as RoundState);
 }
 
 export function clearAllRounds() {

flake.nix

@@ -0,0 +1,22 @@
+  {
+    inputs = {
+      nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
+    };
+    outputs = {nixpkgs, ...}: let
+      forAllSystems = function:
+        nixpkgs.lib.genAttrs nixpkgs.lib.systems.flakeExposed (
+          system: function nixpkgs.legacyPackages.${system}
+        );
+    in {
+      formatter = forAllSystems (pkgs: pkgs.alejandra);
+      devShells = forAllSystems (pkgs: {
+        default = pkgs.mkShell {
+          packages = with pkgs; [
+            bun
+            corepack
+            nodejs
+          ];
+        };
+      });
+    };
+  }