Support Forge Server Login account management and registration prompts

dashboard/src/server/mc.ts

@@ -384,9 +384,30 @@ export async function kickAll(reason: string): Promise<number> {
 
 // ── EasyAuth ────────────────────────────────────────────────────────────
 
+export function authProvider() {
+  return fs.existsSync(path.join(env.mcDataDir, "config", "serverlogin-common.toml")) ? "serverlogin" : "easyauth";
+}
+export function registrationCommand() {
+  return authProvider() === "serverlogin" ? "/login <password> <password>" : "/register <password> <password>";
+}
+
+export function parseServerLoginAccounts(text: string): string[] {
+  const data = JSON.parse(text) as { formatVersion?: number; users?: Record<string, { lastKnownName?: string }> };
+  if (data.formatVersion !== 1 || !data.users || Array.isArray(data.users) || typeof data.users !== "object") throw new Error("Unsupported Server Login account database");
+  return Object.values(data.users).map(account => account?.lastKnownName).filter((name): name is string => typeof name === "string" && isValidUsername(name));
+}
+
 /** Registered account names according to EasyAuth. */
 export async function easyauthList(): Promise<string[]> {
+  if (authProvider() === "serverlogin") {
+    // Confirm the server is reachable before reconciling registration windows.
+    await execChecked("auth count");
+    const file = path.join(env.mcDataDir, "world", "serverlogin", "users.json");
+    if (!fs.existsSync(file)) return [];
+    return parseServerLoginAccounts(fs.readFileSync(file, "utf8"));
+  }
   const out = stripColors(await rcon().exec("auth list"));
+  if (/unknown|incorrect|expected/i.test(out)) throw new Error("Authentication provider did not return an account list");
   // Output is a list of registered usernames; extract all name-like tokens
   // after a colon if present, otherwise from the whole string.
   const colon = out.indexOf(":");
@@ -404,6 +425,7 @@ export async function easyauthRemove(name: string): Promise<string> {
 
 export async function easyauthSetPassword(name: string, password: string): Promise<string> {
   assertValidUsername(name);
+  if (authProvider() === "serverlogin") throw new Error("Use Force re-register, then let the player choose a new password in-game");
   if (!/^[\x21-\x7e]{1,64}$/.test(password)) throw new Error("Unsupported password characters");
   return stripColors(await rcon().exec(`auth update ${name} ${password}`));
 }