first proposal download path selection

server/src/utils/directoryUtils.ts

@@ -0,0 +1,62 @@
+import { readdirSync, statSync } from "fs";
+import { ISettings } from "../interfaces/ISettings";
+
+let settings: ISettings;
+
+class Node {
+    public path: string
+    public children: Node[]
+
+    constructor(path: string) {
+        this.path = path
+        this.children = []
+    }
+}
+
+function buildTreeDFS(rootPath: string, directoryOnly: boolean) {
+    const root = new Node(rootPath)
+    const stack: Node[] = []
+    const flattened: string[] = []
+
+    stack.push(root)
+    flattened.push(rootPath)
+
+    while (stack.length) {
+        const current = stack.pop()
+        if (current) {
+            const children = readdirSync(current.path)
+            for (const it of children) {
+                const childPath = `${current.path}/${it}`
+                const childNode = new Node(childPath)
+
+                if (directoryOnly) {
+                    if (statSync(childPath).isDirectory()) {
+                        current.children.push(childNode)
+                        stack.push(childNode)
+                        flattened.push(childNode.path)
+                    }
+                } else {
+                    current.children.push(childNode)
+                    if (statSync(childPath).isDirectory()) {
+                        stack.push(childNode)
+                        flattened.push(childNode.path)
+                    }
+                }
+            }
+        }
+    }
+
+    return {
+        tree: root,
+        flat: flattened
+    }
+}
+
+try {
+    settings = require('../../settings.json');
+} catch (e) { }
+
+export function directoryTree() {
+    const tree = buildTreeDFS(settings.download_path || 'downloads', true)
+    return tree
+}