front/src/context/auth_context.js

@@ -1,25 +1,57 @@
-import React, { useContext, useState, createContext } from "react";
-
-export const DEFAULT_EXPIRY_TIME_MS = 12 * 60 * 60 * 1000;
+import { useEffect, useContext, createContext } from "react";
+import { useLocalStorage } from "../hooks/useLocalStorage";
 
 const AuthContext = createContext({
   signedIn: false,
   setSignedIn: () => null,
   sessionOver: new Date(),
   setSessionOver: () => null,
-  userId: null,
-  setUserId: () => null,
-  username: "",
-  setUsername: () => null,
+  setPlayer: () => null,
+  player: null,
+  signOut: () => null,
 });
 
 export const useAuthContext = () => useContext(AuthContext);
 
 export const AuthProvider = ({ children }) => {
-  const [signedIn, setSignedIn] = useState(false);
-  const [sessionOver, setSessionOver] = useState(new Date());
-  const [userId, setUserId] = useState(null);
-  const [username, setUsername] = useState(null);
+  const [signedIn, setSignedIn] = useLocalStorage("signedIn", false);
+  const [sessionOver, setSessionOver] = useLocalStorage(
+    "sessionOver",
+    Date.now()
+  );
+  const [player, setPlayer] = useLocalStorage("player", null);
+
+  const setDefaults = () => {
+    setPlayer(null);
+    setSessionOver(Date.now());
+    setSignedIn(false);
+  };
+
+  const signOut = () =>
+    fetch("/api/player/logout", {
+      method: "GET",
+      credentials: "same-origin",
+    }).then(() => setDefaults());
+
+  useEffect(() => {
+    setTimeout(() => {
+      setSessionOver((sessionOver) => {
+        if (Date.now() >= sessionOver) {
+          setSignedIn((signedIn) => {
+            if (signedIn)
+              alert(
+                "Session expired. Any further privileged requests will fail until signed in again."
+              );
+
+            return false;
+          });
+          setPlayer(null);
+        }
+        return sessionOver;
+      });
+    }, sessionOver - Date.now());
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [sessionOver]);
 
   return (
     <AuthContext.Provider
@@ -28,10 +60,9 @@ export const AuthProvider = ({ children }) => {
         setSignedIn,
         sessionOver,
         setSessionOver,
-        userId,
-        setUserId,
-        username,
-        setUsername,
+        signOut,
+        setPlayer,
+        player,
       }}
     >
       {children}

front/src/hooks/useLocalStorage.js

@@ -0,0 +1,28 @@
+import { useState, useEffect } from "react";
+
+const STORAGE_KEYS_PREFIX = "chessh-";
+
+const useStorage = (storage, keyPrefix) => (storageKey, fallbackState) => {
+  if (!storageKey)
+    throw new Error(
+      `"storageKey" must be a nonempty string, but "${storageKey}" was passed.`
+    );
+
+  const storedString = storage.getItem(keyPrefix + storageKey);
+  let parsedObject = null;
+
+  if (storedString !== null) parsedObject = JSON.parse(storedString);
+
+  const [value, setValue] = useState(parsedObject ?? fallbackState);
+
+  useEffect(() => {
+    storage.setItem(keyPrefix + storageKey, JSON.stringify(value));
+  }, [value, storageKey]);
+
+  return [value, setValue];
+};
+
+export const useLocalStorage = useStorage(
+  window.localStorage,
+  STORAGE_KEYS_PREFIX
+);

front/src/root.jsx

@@ -5,18 +5,8 @@ import logo from "./assets/chessh_sm.svg";
 import { useAuthContext } from "./context/auth_context";
 
 export const Root = () => {
-  const { signedIn, setUserId, setSignedIn, setSessionOver } = useAuthContext();
-
-  const signOut = () => {
-    fetch("/api/player/logout", {
-      method: "GET",
-      credentials: "same-origin",
-    }).then(() => {
-      setSignedIn(false);
-      setUserId(null);
-      setSessionOver(new Date());
-    });
-  };
+  const { signedIn, setUserId, setSignedIn, setSessionOver, signOut } =
+    useAuthContext();
 
   return (
     <>

front/src/routes/auth_successful.jsx

@@ -1,33 +1,23 @@
-import { useEffect, useCallback } from "react";
+import { useEffect } from "react";
 import { Link } from "react-router-dom";
 
-import {
-  useAuthContext,
-  DEFAULT_EXPIRY_TIME_MS,
-} from "../context/auth_context";
+import { useAuthContext } from "../context/auth_context";
 
 export const AuthSuccessful = () => {
-  const {
-    username,
-    userId,
-    sessionOver,
-    signedIn,
-    setSignedIn,
-    setUserId,
-    setUsername,
-    setSessionOver,
-  } = useAuthContext();
+  const { player, setPlayer, signedIn, setSignedIn, setSessionOver } =
+    useAuthContext();
 
   useEffect(() => {
-    fetch("/api/player/me", {
+    fetch("/api/player/token/me", {
       credentials: "same-origin",
     })
       .then((r) => r.json())
-      .then((player) => {
+      .then(({ player, expiration }) => {
         setSignedIn(!!player);
-        setUserId(player.id);
-        setUsername(player.username);
+        setPlayer(player);
+        setSessionOver(expiration);
       });
+    // eslint-disable-next-line react-hooks/exhaustive-deps
   }, []);
 
   if (signedIn) {
@@ -35,7 +25,7 @@ export const AuthSuccessful = () => {
       <>
         <h1>Authentication Successful</h1>
         <div>
-          <span>Hello there, {username || ""}! </span>
+          <span>Hello there, {player?.username || ""}! </span>
           <Link to="/home" className="button">
             Go Home{" "}
           </Link>

front/src/routes/home.jsx

@@ -4,7 +4,10 @@ import { Link } from "react-router-dom";
 import { useAuthContext } from "../context/auth_context";
 
 export const Home = () => {
-  const { username, signedIn } = useAuthContext();
+  const {
+    player: { username },
+    signedIn,
+  } = useAuthContext();
 
   if (signedIn) {
     const sshConfig = `Host chessh

front/src/routes/keys.jsx

@@ -67,7 +67,7 @@ const AddKeyButton = ({ onSave }) => {
         "Content-Type": "application/json",
       },
       body: JSON.stringify({
-        key: key.value,
+        key: key.value.trim(),
         name: name.value,
       }),
     })
@@ -77,7 +77,6 @@ const AddKeyButton = ({ onSave }) => {
           if (onSave) {
             onSave();
           }
-          setDefaults();
           close();
         } else if (d.errors) {
           if (typeof d.errors === "object") {
@@ -158,7 +157,9 @@ const AddKeyButton = ({ onSave }) => {
 };
 
 export const Keys = () => {
-  const { userId } = useAuthContext();
+  const {
+    player: { id: userId },
+  } = useAuthContext();
   const [keys, setKeys] = useState(null);
 
   const refreshKeys = useCallback(
@@ -175,9 +176,8 @@ export const Keys = () => {
     }
   }, [userId, refreshKeys]);
 
-  if (!keys) {
-    return <p>Loading...</p>;
-  }
+  if (!keys) return <p>Loading...</p>;
+
   if (Array.isArray(keys)) {
     return (
       <>

lib/chessh/ssh/client/game/game.ex

@@ -35,16 +35,23 @@ defmodule Chessh.SSH.Client.Game do
   def init([
         %State{
           color: color,
-          game: %Game{dark_player_id: dark_player_id, light_player_id: light_player_id}
+          game: %Game{dark_player_id: dark_player_id, light_player_id: light_player_id},
+          player_session: %{player_id: player_id}
         } = state
         | tail
       ])
       when is_nil(color) do
+    {is_dark, is_light} = {player_id == dark_player_id, player_id == light_player_id}
+
     new_state =
-      case {is_nil(dark_player_id), is_nil(light_player_id)} do
-        {true, false} -> %State{state | color: :dark}
-        {false, true} -> %State{state | color: :light}
-        {_, _} -> %State{state | color: Enum.random([:light, :dark])}
+      if is_dark || is_light do
+        %State{state | color: if(is_light, do: :light, else: :dark)}
+      else
+        case {is_nil(dark_player_id), is_nil(light_player_id)} do
+          {true, false} -> %State{state | color: :dark}
+          {false, true} -> %State{state | color: :light}
+          {_, _} -> %State{state | color: :light}
+        end
       end
 
     init([new_state | tail])
@@ -89,18 +96,22 @@ defmodule Chessh.SSH.Client.Game do
     end
 
     binbo_pid = initialize_game(game_id, fen)
-    send(client_pid, {:send_to_ssh, Utils.clear_codes()})
 
     new_game = Repo.get(Game, game_id) |> Repo.preload([:light_player, :dark_player])
 
-    new_state = %State{
-      state
-      | binbo_pid: binbo_pid,
-        color: if(new_game.light_player_id == player_session.player_id, do: :light, else: :dark),
-        game: new_game
-    }
+    player_color =
+      if(new_game.light_player_id == player_session.player_id, do: :light, else: :dark)
 
-    {:ok, new_state}
+    send(client_pid, {:send_to_ssh, Utils.clear_codes()})
+
+    {:ok,
+     %State{
+       state
+       | binbo_pid: binbo_pid,
+         color: player_color,
+         game: new_game,
+         flipped: player_color == :dark
+     }}
   end
 
   def init([

lib/chessh/web/web.ex

@@ -39,21 +39,8 @@ defmodule Chessh.Web.Endpoint do
     {status, body} =
       create_player_from_github_response(resp, github_user_api_url, github_user_agent)
 
-    case body do
-      %{jwt: token} ->
-        client_redirect_location =
-          Application.get_env(:chessh, Web)[:client_redirect_after_successful_sign_in]
-
-        conn
-        |> put_resp_cookie("jwt", token)
-        |> put_resp_header("location", client_redirect_location)
-        |> send_resp(301, '')
-
-      _ ->
-        conn
-        |> put_resp_content_type("application/json")
-        |> send_resp(status, Jason.encode!(body))
-    end
+    conn
+    |> assign_jwt_and_redirect_or_encode(status, body)
   end
 
   put "/player/password" do
@@ -115,8 +102,7 @@ defmodule Chessh.Web.Endpoint do
       end
 
     conn
-    |> put_resp_content_type("application/json")
-    |> send_resp(status, Jason.encode!(body))
+    |> assign_jwt_and_redirect_or_encode(status, body)
   end
 
   get "/player/logout" do
@@ -171,12 +157,15 @@ defmodule Chessh.Web.Endpoint do
     |> send_resp(status, Jason.encode!(body))
   end
 
-  get "/player/me" do
-    player = get_player_from_jwt(conn)
+  get "/player/token/me" do
+    {:ok, jwt} = Token.verify_and_validate(get_jwt(conn))
+
+    %{"uid" => player_id, "exp" => expiration} = jwt
+    player = Repo.get(Player, player_id)
 
     conn
     |> put_resp_content_type("application/json")
-    |> send_resp(200, Jason.encode!(player))
+    |> send_resp(200, Jason.encode!(%{player: player, expiration: expiration * 1000}))
   end
 
   get "/player/:id/keys" do
@@ -242,19 +231,39 @@ defmodule Chessh.Web.Endpoint do
     )
   end
 
-  defp get_player_from_jwt(conn) do
+  defp get_jwt(conn) do
     auth_header =
       Enum.find_value(conn.req_headers, fn {header, value} ->
         if header === "authorization", do: value
       end)
 
-    jwt = if auth_header, do: auth_header, else: Map.get(fetch_cookies(conn).cookies, "jwt")
+    if auth_header, do: auth_header, else: Map.get(fetch_cookies(conn).cookies, "jwt")
+  end
 
-    {:ok, %{"uid" => uid}} = Token.verify_and_validate(jwt)
+  defp get_player_from_jwt(conn) do
+    {:ok, %{"uid" => uid}} = Token.verify_and_validate(get_jwt(conn))
 
     Repo.get(Player, uid)
   end
 
+  defp assign_jwt_and_redirect_or_encode(conn, status, body) do
+    case body do
+      %{jwt: token} ->
+        client_redirect_location =
+          Application.get_env(:chessh, Web)[:client_redirect_after_successful_sign_in]
+
+        conn
+        |> put_resp_cookie("jwt", token)
+        |> put_resp_header("location", client_redirect_location)
+        |> send_resp(301, '')
+
+      _ ->
+        conn
+        |> put_resp_content_type("application/json")
+        |> send_resp(status, Jason.encode!(body))
+    end
+  end
+
   defp create_player_from_github_response(resp, github_user_api_url, github_user_agent) do
     case resp do
       %{"access_token" => access_token} ->