From 614d0c6f1b2015cf213a1f95322fba587f582160 Mon Sep 17 00:00:00 2001
From: 3Shain <san3shain@outlook.com>
Date: Wed, 8 Mar 2023 00:57:07 +0000
Subject: [PATCH] feat: detect multiple instances

---
 src/app.tsx      | 12 ++++++++++++
 src/utils/neu.ts |  5 ++++-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/app.tsx b/src/app.tsx
index a4012ff..f3e321e 100644
--- a/src/app.tsx
+++ b/src/app.tsx
@@ -9,6 +9,9 @@ import {
   prompt,
   addTerminationHook,
   GLOBAL_onClose,
+  getKey,
+  setKey,
+  alert,
 } from "./utils";
 import { createAria2 } from "./aria2";
 import { checkWine, createWine, createWineInstallProgram } from "./wine";
@@ -20,6 +23,15 @@ import { createUpdater, downloadProgram } from "./updater";
 import { createCommonUpdateUI } from "./common-update-ui";
 
 export async function createApp() {
+  try {
+    await getKey("singleton");
+    await alert("NOTE", "LAUNCHER_ALREADY_EXISTS");
+    Neutralino.app.exit(0);
+    return () => null;
+  } catch {
+    await setKey("singleton", "1");
+  }
+
   let aria2_port = 6868;
 
   await Neutralino.events.on("ready", async () => {});
diff --git a/src/utils/neu.ts b/src/utils/neu.ts
index 40ef893..ca4ead5 100644
--- a/src/utils/neu.ts
+++ b/src/utils/neu.ts
@@ -152,7 +152,10 @@ export async function stats(path: string) {
   return await Neutralino.filesystem.getStats(path);
 }
 
-const hooks: Array<(forced: boolean) => Promise<boolean>> = [];
+const hooks: Array<(forced: boolean) => Promise<boolean>> = [async ()=>{
+  await setKey("singleton", null);
+  return true;
+}];
 
 export function addTerminationHook(fn: (forced: boolean) => Promise<boolean>) {
   hooks.push(fn);