server: autodetect install and packages paths for MS store

Autodetect install and packages paths for MS store version. Note that since 1.15.8.0 the base packages are readable even for the MS store version.

Signed-off-by: Octavian Purdila <tavi@cs.pub.ro>

package.json

@@ -3,16 +3,21 @@
     "version": "0.0.1",
     "description": "A Web Simulator for the Microsoft Flight Simulator",
     "homepage": "https://github.com/tavip/msfs-websim",
-    "license": "GPLv2",
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/tavip/msfs-websim.git"
+    },
+    "license": "GPL-2.0-or-later",
     "scripts": {
         "start": "node src/server.js"
     },
     "config": {
         "port": "8080",
-        "msfs_install_dir": "D:/steam/steamapps/common/MicrosoftFlightSimulator/",
-        "msfs_packages_dir": "D:/msfs2020/"
+        "msfs_install_dir": "",
+        "msfs_packages_dir": ""
     },
     "dependencies": {
-        "glob": "^7.1.6"
+        "glob": "^7.1.6",
+        "node-powershell": "4.0.0"
     }
 }

src/server.js

@@ -2,34 +2,44 @@ var http = require('http');
 const fs = require('fs');
 const glob = require('glob');
 const path = require('path');
+const powershell = require('node-powershell');
 const { Buffer } = require('buffer');
 const { dir } = require('console');
+const { runInContext } = require('vm');
+const { type } = require('os');
 
 var config = {
     "port": process.env.npm_package_config_port,
     "msfs_install_dir": process.env.npm_package_config_msfs_install_dir,
     "msfs_packages_dir": process.env.npm_package_config_msfs_packages_dir
 };
 
-try {
-    if (!fs.statSync(config.msfs_install_dir + '/Packages').isDirectory()) {
-        throw "invalid MSFS install directory";
-    }
-    if (!fs.statSync(config.msfs_packages_dir + '/Official/OneStore').isDirectory()) {
-        throw ("invalid MSFS packages directory");
+async function findMSFS() {
+    const msStoreName = "Microsoft.FlightSimulator";
+    let msStorePubId;
+    let ps = new powershell();
+
+    if (!config.msfs_install_dir) {
+        ps.addCommand(`Get-AppxPackage ${msStoreName} | ConvertTo-Json`)
+        let res = JSON.parse(await ps.invoke());
+        if (res) {
+            config.msfs_install_dir = res.InstallLocation;
+            msStorePubId = res.PublisherId;
+        }
+        ps.clear();
     }
-    if (!config.port) {
-        console.warn("using default 8080 port")
-        config.port=8080;
+    if (!config.msfs_packages_dir) {
+        if (msStorePubId) {
+            ps.addCommand(`cat ${process.env.LOCALAPPDATA}\\Packages\\${msStoreName}_${msStorePubId}\\LocalCache\\UserCfg.opt | Select-String InstalledPackagesPath`);
+            let res = await ps.invoke();
+            if (res) {
+                config.msfs_packages_dir = res.match(/"(.*)"/)[1]
+            }
+        }
     }
-} catch (err) {
-    console.error("bad configuration, exiting");
-    throw err;
+    ps.dispose();
 }
 
-var packages_dirs = [ config.msfs_packages_dir + '/Official/OneStore/',
-                      config.msfs_packages_dir + '/Community/', '.' ]
-
 /**
  * Create a database with all of the files from all packages for a given
  * resource type.
@@ -75,22 +85,50 @@ function search_files(top_dirs, type, filematch=null) {
     }
 
     console.log(`found ${files.size} files`);
-    return files
+    return files;
 }
 
-html_ui_files = search_files([config.msfs_install_dir + '/Packages'].concat(packages_dirs), 'html_ui')
-vfs_files = search_files(packages_dirs, 'SimObjects', [ '.xml', 'thumbnail.jpg' ])
+async function findFiles() {
+    await findMSFS();
 
-/**
-  * Some HTML files pull in CSS files by using relative paths (e.g. style.css
-  * instead of a/b/style.css). To work-around this issue keep an array with the
-  * directories of HTML files and search the CSS files in all of them.
-  */
-html_dirs = new Array();
-html_dirs.push("");
+    try {
+        if (!fs.statSync(config.msfs_install_dir + '/Packages').isDirectory()) {
+            throw "invalid MSFS install directory";
+        } else {
+            console.log(`MSFS install dir: ${config.msfs_install_dir}`);
+        }
+        if (!fs.statSync(config.msfs_packages_dir + '/Official/OneStore').isDirectory()) {
+            throw ("invalid MSFS packages directory");
+        } else {
+            console.log(`MSFS packages dir: ${config.msfs_packages_dir}`);
+        }
+        if (!config.port) {
+            console.warn("using default 8080 port")
+            config.port = 8080;
+        }
+    } catch (err) {
+        console.error("bad configuration, exiting");
+        throw err;
+    }
 
+    let packages_dirs = [ 
+        config.msfs_packages_dir + '/Official/OneStore/',
+        config.msfs_packages_dir + '/Community/', '.' 
+    ]
+
+    html_ui_files = search_files([config.msfs_install_dir + '/Packages'].concat(packages_dirs), 'html_ui')
+    vfs_files = search_files(packages_dirs, 'SimObjects', [ '.xml', 'thumbnail.jpg' ])
+
+    /**
+     * Some HTML files pull in CSS files by using relative paths (e.g. style.css
+     * instead of a/b/style.css). To work-around this issue keep an array with the
+     * directories of HTML files and search the CSS files in all of them.
+     */
+    html_dirs = new Array();
+    html_dirs.push("");
+}
 
-http.createServer(function (req, resp) {
+function requestListener(req, resp) {
     var f = req.url.split('?')[0];
     let contentType = 'text/plain';
     var files = html_ui_files;
@@ -175,4 +213,12 @@ http.createServer(function (req, resp) {
             }
         });
     }
-}).listen(config.port);
+}
+
+async function main() {
+    await findFiles();
+    console.log(`starting server at http://localhost:${config.port}`)
+    http.createServer(requestListener).listen(config.port);
+}
+
+main()