convert node to static class

lib/node.js

@@ -1,8 +1,9 @@
 import path from 'path'
 import fs from "fs"
 
-export const Node = {
-  isFile: function(filename) {
+export class Node {
+
+  static isFile = (filename) => {
     try {
       return fs.existsSync(filename)
     } catch (err) {
@@ -10,11 +11,13 @@ export const Node = {
       return false
     }
 
-  },
-  getFullPath: function(folderPath) {
+  }
+
+  static getFullPath = (folderPath) => {
     return fs.readdirSync(folderPath).map(fn => path.join(folderPath, fn))
-  },
-  getFiles: function(dir) {
+  }
+
+  static getFiles = (dir) => {
     var results = [];
     var list = fs.readdirSync(dir);
     list.forEach(function(file) {
@@ -29,12 +32,13 @@ export const Node = {
       }
     });
     return results.filter(f => f.endsWith(".md"))
-  },
-  readFileSync: function(fullPath) {
-    return fs.readFileSync(fullPath, "utf8")
-  },
+  }
 
-  getMarkdownFolder: function() {
+  static readFileSync = (fullPath) => {
+    return fs.readFileSync(fullPath, "utf8")
+  }
+
+  static getMarkdownFolder = () => {
     const notesDir = path.join(process.cwd(), 'notes')
     if (!Node.isFile(notesDir)) {
       console.warn("Notes Directory does not seem to exist: ", notesDir)