From 5f7a1a62cfae2b1b70edfa45217c1af818d64366 Mon Sep 17 00:00:00 2001
From: Bao Nguyen <baonguyen@Baos-MacBook-Air.local>
Date: Tue, 14 Feb 2023 14:23:03 +0700
Subject: [PATCH] prevent item from pasting into itself

---
 src/lib/fs.js | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/src/lib/fs.js b/src/lib/fs.js
index 2b4d94e..8c8f8bc 100644
--- a/src/lib/fs.js
+++ b/src/lib/fs.js
@@ -75,7 +75,27 @@ export function del_fs(id){
     }
 }
 
+function dir_contains_dir(a, b){
+    if(a == null || b == null) return false;
+    if(get(hardDrive)[a] == null) return false;
+    if(get(hardDrive)[b] == null) return false;
+    if(a == b) return true;
+    
+    let paths = [];
+    while(get(hardDrive)[b].parent != null){
+        let parent = get(hardDrive)[b].parent;
+        paths.push(parent);
+        b = parent;
+    }
+    return paths.includes(a);
+
+}
 export function clone_fs(obj_current_id, parent_id, new_id=null){
+    if(dir_contains_dir(obj_current_id, parent_id)){
+        console.log('cannot paste item onto itself');
+        return;
+    }
+
     let obj = {...get(hardDrive)[obj_current_id]};
 
     if(new_id == null){