feat: Improve OurDBFS ID generation and data persistence

- Use a counter for consistent ID generation in OurDBFS: This
  eliminates reliance on timestamps, preventing ID collisions and
  improving data integrity.
- Refactor save methods to directly use the VFS's save_entry
  function: This simplifies the code and reduces redundancy across
  different file system entity types (Directory, File, Symlink).
- Update `save_entry` in OurDBFS to use IDs for database updates:
  This ensures data is correctly updated in the database based on the
  unique ID of each entry.  This also fixes potential issues with
  overwriting data.

lib/vfs/ourdb_fs/directory.v

@@ -15,7 +15,7 @@ pub mut:
 }
 
 pub fn (mut self Directory) save() ! {
-	self.metadata.id = self.myvfs.save_entry(self)!
+	self.myvfs.save_entry(self)!
 }
 
 // write creates a new file or writes to an existing file
@@ -45,7 +45,7 @@ pub fn (mut dir Directory) write(name string, content string) !&File {
 		current_time := time.now().unix()
 		file = &File{
 			metadata:  Metadata{
-				// id:          u32(time.now().unix())
+				id:          dir.myvfs.get_next_id()
 				name:        name
 				file_type:   .file
 				size:        u64(content.len)
@@ -62,11 +62,11 @@ pub fn (mut dir Directory) write(name string, content string) !&File {
 		}
 
 		// Save new file to DB
-		file.metadata.id = dir.myvfs.save_entry(file)!
+		dir.myvfs.save_entry(file)!
 
 		// Update children list
 		dir.children << file.metadata.id
-		dir.metadata.id = dir.myvfs.save_entry(dir)!
+		dir.myvfs.save_entry(dir)!
 	} else {
 		// Update existing file
 		file.write(content)!
@@ -141,7 +141,7 @@ pub fn (mut dir Directory) mkdir(name string) !&Directory {
 	current_time := time.now().unix()
 	mut new_dir := Directory{
 		metadata:  Metadata{
-			// id:          u32(time.now().unix()) // Use timestamp as ID
+			id:          dir.myvfs.get_next_id()
 			name:        name
 			file_type:   .directory
 			created_at:  current_time
@@ -157,11 +157,11 @@ pub fn (mut dir Directory) mkdir(name string) !&Directory {
 	}
 
 	// Save new directory to DB
-	new_dir.metadata.id = dir.myvfs.save_entry(new_dir)!
+	dir.myvfs.save_entry(new_dir)!
 
 	// Update children list
 	dir.children << new_dir.metadata.id
-	dir.metadata.id = dir.myvfs.save_entry(dir)!
+	dir.myvfs.save_entry(dir)!
 
 	return &new_dir
 }
@@ -180,6 +180,7 @@ pub fn (mut dir Directory) touch(name string) !&File {
 	current_time := time.now().unix()
 	mut new_file := File{
 		metadata:  Metadata{
+			id:          dir.myvfs.get_next_id()
 			name:        name
 			file_type:   .file
 			size:        0
@@ -196,11 +197,11 @@ pub fn (mut dir Directory) touch(name string) !&File {
 	}
 
 	// Save new file to DB
-	new_file.metadata.id = dir.myvfs.save_entry(new_file)!
+	dir.myvfs.save_entry(new_file)!
 
 	// Update children list
 	dir.children << new_file.metadata.id
-	dir.metadata.id = dir.myvfs.save_entry(dir)!
+	dir.myvfs.save_entry(dir)!
 
 	return &new_file
 }
@@ -236,7 +237,7 @@ pub fn (mut dir Directory) rm(name string) ! {
 
 	// Update children list
 	dir.children.delete(found_idx)
-	dir.metadata.id = dir.myvfs.save_entry(dir)!
+	dir.myvfs.save_entry(dir)!
 }
 
 // get_children returns all immediate children as FSEntry objects
@@ -266,9 +267,7 @@ pub fn (mut dir Directory) delete() ! {
 	dir.children.clear()
 
 	// Save the updated directory
-	dir.metadata.id = dir.myvfs.save_entry(dir) or {
-		return error('Failed to save directory: ${err}')
-	}
+	dir.myvfs.save_entry(dir) or { return error('Failed to save directory: ${err}') }
 }
 
 // add_symlink adds an existing symlink to this directory
@@ -283,9 +282,9 @@ pub fn (mut dir Directory) add_symlink(mut symlink Symlink) ! {
 	}
 
 	// Save symlink to DB
-	symlink.metadata.id = dir.myvfs.save_entry(symlink)!
+	dir.myvfs.save_entry(symlink)!
 
 	// Add to children
 	dir.children << symlink.metadata.id
-	dir.metadata.id = dir.myvfs.save_entry(dir)!
+	dir.myvfs.save_entry(dir)!
 }

lib/vfs/ourdb_fs/file.v

@@ -12,7 +12,7 @@ pub mut:
 }
 
 pub fn (mut f File) save() ! {
-	f.metadata.id = f.myvfs.save_entry(f)!
+	f.myvfs.save_entry(f)!
 }
 
 // write updates the file's content

lib/vfs/ourdb_fs/symlink.v

@@ -12,7 +12,7 @@ pub mut:
 }
 
 pub fn (mut sl Symlink) save() ! {
-	sl.metadata.id = sl.myvfs.save_entry(sl)!
+	sl.myvfs.save_entry(sl)!
 }
 
 // update_target changes the symlink's target path

lib/vfs/ourdb_fs/vfs.v

@@ -1,6 +1,7 @@
 module ourdb_fs
 
 import freeflowuniverse.herolib.data.ourdb
+import time
 
 // OurDBFS represents the virtual filesystem
 @[heap]
@@ -12,6 +13,13 @@ pub mut:
 	metadata_dir     string       // Directory where we store the metadata
 	db_data          &ourdb.OurDB // Database instance for persistent storage
 	db_meta          &ourdb.OurDB // Database instance for metadata storage
+	last_inserted_id u32
+}
+
+// Get the next ID, it should be some kind of auto-incrementing ID
+pub fn (mut fs OurDBFS) get_next_id() u32 {
+	fs.last_inserted_id = fs.last_inserted_id + 1
+	return fs.last_inserted_id
 }
 
 // get_root returns the root directory
@@ -28,13 +36,22 @@ pub fn (mut fs OurDBFS) get_root() !&Directory {
 	// Create and save new root directory
 	mut myroot := Directory{
 		metadata:  Metadata{
+			id:          fs.get_next_id()
 			file_type:   .directory
+			name:        ''
+			created_at:  time.now().unix()
+			modified_at: time.now().unix()
+			accessed_at: time.now().unix()
+			mode:        0o755  // default directory permissions
+			owner:       'user' // TODO: get from system
+			group:       'user' // TODO: get from system
 		}
 		parent_id: 0
 		myvfs:     &fs
 	}
 	myroot.save()!
 	fs.root_id = myroot.metadata.id
+	myroot.save()!
 
 	return &myroot
 }
@@ -76,19 +93,19 @@ pub fn (mut fs OurDBFS) save_entry(entry FSEntry) !u32 {
 	match entry {
 		Directory {
 			encoded := entry.encode()
-			return fs.db_meta.set(data: encoded) or {
+			return fs.db_meta.set(id: entry.metadata.id, data: encoded) or {
 				return error('Failed to save directory on id:${entry.metadata.id}: ${err}')
 			}
 		}
 		File {
 			encoded := entry.encode()
-			return fs.db_meta.set(data: encoded) or {
+			return fs.db_meta.set(id: entry.metadata.id, data: encoded) or {
 				return error('Failed to save file on id:${entry.metadata.id}: ${err}')
 			}
 		}
 		Symlink {
 			encoded := entry.encode()
-			return fs.db_meta.set(data: encoded) or {
+			return fs.db_meta.set(id: entry.metadata.id, data: encoded) or {
 				return error('Failed to save symlink on id:${entry.metadata.id}: ${err}')
 			}
 		}

lib/vfs/vfscore/interface.v

@@ -10,6 +10,7 @@ pub enum FileType {
 // Metadata represents the common metadata for both files and directories
 pub struct Metadata {
 pub mut:
+	id          u32    // name of file or directory
 	name        string // name of file or directory
 	file_type   FileType
 	size        u64

lib/vfs/vfsourdb/vfsourdb.v

@@ -16,7 +16,7 @@ pub fn new(data_dir string, metadata_dir string) !&OurDBVFS {
 	mut core := ourdb_fs.new(
 		data_dir:         data_dir
 		metadata_dir:     metadata_dir
-		incremental_mode: true
+		incremental_mode: false
 	)!
 
 	return &OurDBVFS{
@@ -59,13 +59,15 @@ pub fn (mut self OurDBVFS) file_write(path string, data []u8) ! {
 }
 
 pub fn (mut self OurDBVFS) delete(path string) ! {
-	// mut impl, rel_path := self.find_vfs(path)!
-	// return impl.file_read(rel_path)
+	println('Not implemented')
 }
 
 pub fn (mut self OurDBVFS) link_delete(path string) ! {
-	// mut impl, rel_path := self.find_vfs(path)!
-	// return impl.file_read(rel_path)
+	parent_path := os.dir(path)
+	file_name := os.base(path)
+
+	mut parent_dir := self.get_directory(parent_path)!
+	parent_dir.rm(file_name)!
 }
 
 pub fn (mut self OurDBVFS) file_delete(path string) ! {
@@ -136,7 +138,7 @@ pub fn (mut self OurDBVFS) link_create(target_path string, link_path string) !vf
 
 	mut symlink := ourdb_fs.Symlink{
 		metadata:  ourdb_fs.Metadata{
-			id:          u32(time.now().unix())
+			id:          self.core.get_next_id()
 			name:        link_name
 			file_type:   .symlink
 			created_at:  time.now().unix()
@@ -240,6 +242,7 @@ fn convert_to_vfscore_entry(entry ourdb_fs.FSEntry) vfscore.FSEntry {
 
 fn convert_metadata(meta ourdb_fs.Metadata) vfscore.Metadata {
 	return vfscore.Metadata{
+		id:          meta.id
 		name:        meta.name
 		file_type:   match meta.file_type {
 			.file { vfscore.FileType.file }

lib/vfs/vfsourdb/vfsourdb_test.v

@@ -43,7 +43,7 @@ fn test_vfsourdb() ! {
 	assert read_content == test_content
 
 	// Test directory listing
-	entries := vfs.dir_list('/test_dir')!
+	mut entries := vfs.dir_list('/test_dir')!
 	assert entries.len == 1
 	assert entries[0].get_metadata().name == 'test.txt'
 
@@ -57,10 +57,17 @@ fn test_vfsourdb() ! {
 	link_target := vfs.link_read('/test_dir/test_link')!
 	assert link_target == '/test_dir/test.txt'
 
+	// Test symlink deletion
+	vfs.link_delete('/test_dir/test_link')!
+	assert vfs.exists('/test_dir/test_link') == false
+
 	// Test file deletion
 	vfs.file_delete('/test_dir/test.txt')!
 	assert vfs.exists('/test_dir/test.txt') == false
 
+	entries = vfs.dir_list('/test_dir')!
+	assert entries.len == 0
+
 	// Test directory deletion
 	vfs.dir_delete('/test_dir')!
 	assert vfs.exists('/test_dir') == false