feat: create FileNode class, addChild method

packages/file-graph/fileNode.js

@@ -0,0 +1,41 @@
+import path from 'path'
+import File from './file.js'
+
+export default class FileNode extends File {
+  constructor(file) {
+    super(file)
+    this.children = []
+  }
+
+  addChild(fileInput) {
+    const file = new File(fileInput)
+    if (file.path === this.path) {
+      throw new Error('File already exists in the tree')
+    }
+
+    const parentPath = path.dirname(file.path)
+    if (parentPath === this.path) {
+      // Direct child of this node
+      this.children.push(new FileNode(file))
+    } else {
+      // Recursively call addChild on the correct child node
+      const childNode = this.children.find((child) => child.contains(file))
+      if (childNode) {
+        childNode.addChild(file)
+      } else {
+        console.log(fileInput, this)
+        throw new Error('Parent path not found in the tree')
+      }
+    }
+  }
+
+  toString() {
+    const indent = '    '.repeat(this.path.split('/').length - 1)
+    const childrenString = this.children
+      .map((child) => child.toString())
+      .join('')
+    return `${indent}${this.name}${
+      this.isDirectory() ? '/' : ''
+    }\n${childrenString}`
+  }
+}