config file management added

.gitignore

@@ -0,0 +1,3 @@
+config.json
+config.json.bak
+instances.json

upnpMapper.js

@@ -0,0 +1,74 @@
+const fs = require('node:fs/promises');
+const path = require('path');
+const exec = require("child_process").execSync;
+
+var config = null;
+
+function clone(obj) {
+    return JSON.parse(JSON.stringify(obj));
+}
+
+function cleanPath(pathToClean) {
+    let regex = /[<>:"|\?\*]/g;
+    let cleanPath = path.normalize(pathToClean);
+
+    let isAbsolute = path.isAbsolute(cleanPath);
+    cleanPath = cleanPath.replace(regex, '');
+    if (/^win/i.test(process.platform) && isAbsolute) {
+        cleanPath = `${cleanPath.slice(0, 1)}:${cleanPath.slice(1)}`;
+    }
+
+    return cleanPath;
+}
+
+async function mkDir(dirPath) {
+    try {
+        await fs.access(cleanPath(dirPath));
+    }
+    catch (err) {
+        await fs.mkdir(cleanPath(dirPath), { recursive: true });
+    }
+    await fs.access(cleanPath(dirPath));
+}
+
+async function writeFile(dir, file, data) {
+    let cleanDir = cleanPath(dir);
+    let cleanFile = cleanPath(file);
+
+    await mkDir(dir);
+
+    return fs.writeFile(`${cleanDir}/${cleanFile}`, data);
+}
+
+async function readFile(file, { format = 'utf8' } = {}) {
+    return fs.readFile(cleanPath(file), format);
+}
+
+async function loadConfig({ configPath = __dirname, configName = 'config.json' } = {}) {
+    let configDefault = {
+        "instancesPath": "",
+    };
+
+    try {
+        config = JSON.parse(await readFile(cleanPath(`${configPath}/${configName}`)));
+    }
+    catch (err) {
+        config = clone(configDefault);
+    }
+
+    await saveConfig();
+    await saveConfig({ configName: `${configName}.bak` });
+}
+
+
+async function saveConfig({ configPath = __dirname, configName = 'config.json' } = {}) {
+    await writeFile(cleanPath(configPath), cleanPath(configName), JSON.stringify(config, null, 4));
+}
+
+async function main() {
+    await loadConfig();
+    console.log(config.instancesPath);
+    
+}
+
+main();