some experimental stuff 👀

.vscode/launch.json

@@ -0,0 +1,17 @@
+{
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "Debug Main Process",
+      "type": "node",
+      "request": "launch",
+      "cwd": "${workspaceFolder}",
+      "runtimeExecutable": "${workspaceFolder}/node_modules/.bin/electron",
+      "windows": {
+        "runtimeExecutable": "${workspaceFolder}/node_modules/.bin/electron.cmd"
+      },
+      "args" : ["."],
+      "outputCapture": "std"
+    }
+  ]
+}

app.js

@@ -195,11 +195,19 @@ const run = () => {
         } else linuxWMCtrlFound = true;
       } else {
         const osuFolder = await config.get("osuPath");
+        console.log(osuFolder, !osuFolder || osuFolder == "");
         if (!osuFolder || osuFolder == "") {
           const foundFolder = await osuUtil.findOsuInstallation();
+          if (foundFolder && osuUtil.isValidOsuFolder(foundFolder)) {
+            mainWindow.webContents.send('alert_message', foundFolder);
+          }
           console.log("osu! Installation located at: ", foundFolder);
         }
       }
+    });
+    ipcMain.on("alert_response", async (event, path) => {
+      console.log("yes");
+      await config.set("osuPath", path);
     })
     app.on('activate', function () {
       if (BrowserWindow.getAllWindows().length === 0) mainWindow = createWindow();
@@ -208,6 +216,8 @@ const run = () => {
       app.quit()
     })
     ipcMain.handle('launch', async () => {
+      const osuFolder = await config.get("osuPath");
+      await osuUtil.updateOsuCfg(path.join(osuFolder, "osu!.cfg"));
       const osuConfig = await osuUtil.getLatestConfig(tempOsuPath);
       const username = await config.get('username');
       const password = await config.get('password');
@@ -221,13 +231,17 @@ const run = () => {
         await osuUtil.setConfigValue(osuConfig.path, "Username", "");
         await osuUtil.setConfigValue(osuConfig.path, "Password", "");
       }
+      await osuUtil.replaceUI(osuFolder, true);
       rpc.updateState("Launching osu!...");
       isIngame = true;
       if (mainWindow.isVisible()) mainWindow.hide();
       const result = await osuUtil.startOsuWithDevServer(tempOsuPath, "ez-pp.farm", async () => {
-        isIngame = false;
         if (!mainWindow.isVisible()) mainWindow.show();
+        setTimeout(async () => {
+          isIngame = false;
+          await osuUtil.replaceUI(osuFolder, false);
           await doUpdateCheck(mainWindow);
+        }, 2000);
       });
       return result;
     })
@@ -344,6 +358,7 @@ async function tryLogin(window) {
 
 async function doUpdateCheck(window) {
   const osuPath = await config.get("osuPath");
+  console.log("osuPath:", osuPath);
   if (!osuPath || osuPath.trim == "") {
     window.webContents.send('status_update', {
       type: "missing-folder"

assets/launcher.css

@@ -13,6 +13,19 @@ body {
   background-color: hsl(var(--main-bg), 24%, 19%);
 }
 
+p.text-white {
+  margin: .5rem 0;
+  color: white;
+}
+
+.quotetext {
+  color: white;
+  background-color: #727272;
+  border-radius: .35rem;
+  font-size: .95rem;
+  padding: .25rem .5rem;
+}
+
 .sections {
   display: flex;
   flex-flow: column;

osuUtil.js

@@ -8,8 +8,10 @@ const { EventEmitter } = require('events');
 const { DownloaderHelper } = require('node-downloader-helper');
 
 const checkUpdateURL = "https://osu.ppy.sh/web/check-updates.php?action=check&stream=";
+const customUIDLLPath = "";
+const customUIDLLName = "ezpp!ui.dll";
 const ignoredOsuEntities = [
-    'osu!auth.dll'
+  'osu!auth.dll',
 ]
 const osuEntities = [
   'avcodec-51.dll',
@@ -174,6 +176,34 @@ async function setConfigValue(configPath, key, value) {
   }
   await fs.promises.writeFile(configPath, configLines.join("\n"), 'utf-8');
 }
+
+async function updateOsuCfg(cfgPath) {
+  const osuFolder = path.dirname(cfgPath);
+  const fileStream = await fs.promises.readFile(cfgPath, "utf-8");
+  const lines = fileStream.split(/\r?\n/);
+  const newLines = [];
+  for (const line of lines) {
+    if (line.includes(' = ')) {
+      const argsPair = line.split(' = ', 2);
+      const keyname = argsPair[0]
+      const value = argsPair[1];
+
+      if (keyname.startsWith("h_")) {
+        const filename = keyname.substring(2, keyname.length);
+        const filepath = path.join(osuFolder, filename);
+        if (!fs.existsSync(filepath)) continue;
+        const binaryFileContents = await fs.promises.readFile(filepath);
+        const existingFileMD5 = crypto.createHash("md5").update(binaryFileContents).digest("hex");
+        if (value == existingFileMD5) newLines.push(line)
+        else newLines.push(`${keyname} = ${existingFileMD5}`);
+      } else {
+        newLines.push(line);
+      }
+    }
+  }
+  await fs.promises.writeFile(cfgPath, newLines.join("\n"), 'utf-8');
+}
+
 async function findOsuInstallation() {
   const regedit = require('qiao-regedit');
 
@@ -183,14 +213,32 @@ async function findOsuInstallation() {
     if (line.includes("REG_SZ")) {
       let value = (line.trim().split("    ")[2]);
       value = value.substring(1, value.length - 3);
-            return value.trim();
+      return path.dirname(value.trim());
     }
   }
   return undefined;
 }
 
+async function replaceUI(folder, isStart) {
+  const ezppUIFile = path.join(folder, customUIDLLName);
+  const osuUIFile = path.join(folder, "osu!ui.dll");
+  const osuUIFileBackup = path.join(folder, "osu!ui.dll.bak");
+  if (isStart) {
+    if (fs.existsSync(osuUIFileBackup)) await fs.promises.unlink(osuUIFileBackup);
+    await fs.promises.rename(osuUIFile, osuUIFileBackup);
+    await new Promise((res) => setTimeout(res, 1000));
+    await fs.promises.rename(ezppUIFile, osuUIFile);
+  } else {
+    if (!fs.existsSync(osuUIFileBackup)) return;
+    await fs.promises.rename(osuUIFile, ezppUIFile);
+    await new Promise((res) => setTimeout(res, 1000));
+    await fs.promises.rename(osuUIFileBackup, osuUIFile);
+  }
+
+}
+
 module.exports = {
   isValidOsuFolder, getLatestConfig, getUpdateFiles, filesThatNeedUpdate,
   downloadUpdateFiles, startOsuWithDevServer: startWithDevServer, setConfigValue,
-    findOsuInstallation
+  findOsuInstallation, replaceUI, updateOsuCfg
 }

preload/preload.js

@@ -188,6 +188,28 @@ window.addEventListener('DOMContentLoaded', () => {
     }
   })
 
+  ipcRenderer.on('alert_message', async (event, path) => {
+    const res = await Swal.fire({
+      title: 'Hey!',
+      html: `<p class="text-white">Detected a osu! installation at</p><span class="quotetext">${path}</span><p class="text-white">Is this correct?</p>`,
+      icon: 'info',
+      showCancelButton: true,
+      confirmButtonText: 'Yes',
+      cancelButtonText: 'No',
+    });
+    if (res.isConfirmed) {
+      $('#currentOsuPath').text(path);
+      ipcRenderer.send('alert_response', path);
+      Swal.fire({
+        title: 'Success!',
+        text: 'osu! folder set.',
+        icon: 'success',
+        confirmButtonText: 'Cool'
+      })
+      ipcRenderer.send("do-update-check");
+    }
+  })
+
   ipcRenderer.on('status_update', (event, status) => {
     switch (status.type) {
       case "up-to-date":