2023-10-31 17:37:40 -05:00
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#![allow(unused)]
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2023-10-31 23:53:43 -05:00
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use std::{
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cell::RefCell,
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ops::Deref,
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rc::{Rc, Weak},
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};
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// #[derive(Debug)]
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// pub struct NodeRef(Rc<RefCell<Node>>);
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2022-12-07 01:26:48 -06:00
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#[derive(Debug)]
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2023-10-31 23:53:43 -05:00
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pub struct FileRef(Rc<RefCell<File>>);
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2022-12-07 01:26:48 -06:00
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#[derive(Debug)]
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2023-10-31 23:53:43 -05:00
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pub struct DirRef(Rc<RefCell<Dir>>);
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#[derive(Debug)]
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pub struct WeakDirRef(Weak<RefCell<Dir>>);
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#[derive(Debug)]
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pub enum Node {
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Dir(DirRef),
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File(FileRef),
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2022-12-07 01:26:48 -06:00
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}
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#[derive(Debug)]
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2023-10-31 23:53:43 -05:00
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pub struct File {
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parent: WeakDirRef,
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pub name: String,
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pub size: usize,
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}
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#[derive(Debug, Default)]
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pub struct Dir {
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parent: Option<WeakDirRef>,
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pub name: String,
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children: Vec<Node>,
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}
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impl DirRef {
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//impling it on the ref makes the recursion a bit easier.
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fn total_size(&self) -> usize {
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self.0
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.borrow()
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.deref()
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.children
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.iter()
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.map(|f| match f {
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Node::Dir(dir) => dir.total_size(),
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Node::File(file) => file.0.borrow().size,
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})
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.sum()
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}
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fn new(name: String) -> Self {
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DirRef(Rc::new(RefCell::new(Dir {
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parent: None,
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name,
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children: Vec::new(),
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})))
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}
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//needs to be impled on the ref because of the need to get a weak backreference to self.
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fn add(&self, node: Node) {
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match node {
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Node::Dir(ref dir) => {
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dir.0.borrow_mut().parent = Some(WeakDirRef(Rc::downgrade(&self.0)))
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}
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Node::File(ref file) => file.0.borrow_mut().parent = WeakDirRef(Rc::downgrade(&self.0)),
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}
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self.0.borrow_mut().children.push(node);
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}
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}
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impl File {
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fn get_parent(&self)-> &WeakDirRef {
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&self.parent
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}
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}
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impl Dir {
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fn get_children(&self) -> &[Node] {
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&self.children
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}
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fn get_parent(&self) -> &Option<WeakDirRef> {
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&self.parent
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}
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2022-12-07 01:26:48 -06:00
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}
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