coded myself into yet another corner...
This commit is contained in:
parent
3f60887645
commit
70a96b79a2
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@ -1,198 +1,136 @@
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#![allow(unused)]
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use std::{
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cell::RefCell,
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fmt::{Debug, Display},
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iter,
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collections::{hash_map, HashMap},
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ops::Deref,
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rc::{Rc, Weak},
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slice::Iter,
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};
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//these cant be just a type, as methods need to be impl'd on them.
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pub struct FileRef(Rc<RefCell<File>>);
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pub type WeakDirRef = Weak<RefCell<Dir>>;
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pub trait FileLike {
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fn get_parent(&self) -> Option<DirRef>;
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fn get_name(&self) -> String;
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}
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#[derive(Debug)]
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pub struct DirRef(Rc<RefCell<Dir>>);
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pub struct WeakDirRef(Weak<RefCell<Dir>>);
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pub enum Node {
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Dir(DirRef),
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File(FileRef),
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}
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impl Deref for DirRef {
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type Target = Rc<RefCell<Dir>>;
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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(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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fn deref(&self) -> &Self::Target {
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&self.0
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}
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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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pub fn add_child_node(&mut self, mut node: Node) -> NodeRef {
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node.change_parent(self);
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let node_ref = NodeRef(Rc::new(RefCell::new(node)));
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Rc::clone(self)
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.borrow_mut()
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.children
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.push(NodeRef(Rc::clone(&node_ref)));
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node_ref
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}
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pub fn add_child_dir(&mut self, mut dir: Dir) -> DirRef {
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dir.parent = Some(Rc::downgrade(self));
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let dir_ref = DirRef(Rc::new(RefCell::new(dir)));
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Rc::clone(self).borrow_mut().children.push(
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Node::Dir(())
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);
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todo!()
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}
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}
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#[derive(Debug)]
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pub struct Dir {
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name: String,
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parent: Option<WeakDirRef>,
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children: Vec<NodeRef>,
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}
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impl Dir {
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pub fn get_total_size(&self) -> usize {
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self.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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.map(|n| -> usize {
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match Rc::clone(n).borrow().deref() {
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Node::Dir(d) => d.get_total_size(),
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Node::File(f) => f.size,
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}
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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) -> Node {
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let ret;
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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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ret = Node::Dir(DirRef(Rc::clone(&dir.0)));
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}
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Node::File(ref file) => {
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file.0.borrow_mut().parent = WeakDirRef(Rc::downgrade(&self.0));
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ret = Node::File(FileRef(Rc::clone(&file.0)));
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}
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}
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self.0.borrow_mut().children.push(node);
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ret
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}
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//because a file always has a parent, it needs to be created off of a node.
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fn new_file(&self, name: String, size: usize) -> FileRef {
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let file = File {
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parent: WeakDirRef(Rc::downgrade(&self.0)),
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name,
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size,
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};
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let file_ref = FileRef(Rc::new(RefCell::new(file)));
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//have to unpack and repack to make a copy.
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self.0
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.borrow_mut()
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.children
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.push(Node::File(FileRef(Rc::clone(&file_ref.0))));
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file_ref
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pub fn get_children(&self) -> impl Iterator<Item = NodeRef> + '_ {
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self.children.iter().map(|n| NodeRef(Rc::clone(n)))
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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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impl FileLike for Dir {
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fn get_parent(&self) -> Option<DirRef> {
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Some(DirRef(self.parent.as_ref()?.upgrade()?))
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}
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fn get_name(&self) -> String {
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self.name.clone()
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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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#[derive(Debug)]
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pub struct NodeRef(Rc<RefCell<Node>>);
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fn get_parent(&self) -> &Option<WeakDirRef> {
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&self.parent
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impl Deref for NodeRef {
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type Target = Rc<RefCell<Node>>;
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fn deref(&self) -> &Self::Target {
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&self.0
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}
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}
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#[derive(Debug)]
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pub enum Node {
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Dir(Dir),
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File(File),
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}
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impl Node {
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fn get_dir(&self) -> Option<DirRef> {
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fn change_parent(&mut self, new_parent: &DirRef) {
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match self {
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Node::Dir(dir) => Some(DirRef(Rc::clone(&dir.0))),
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Node::File(_) => None,
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Node::Dir(d) => d.parent = Some(Rc::downgrade(new_parent)),
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Node::File(f) => f.parent = Rc::downgrade(new_parent),
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}
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}
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}
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//transparent
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impl Display for DirRef {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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// f.debug_tuple("DirRef").field(self.0.borrow().deref()).finish()
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let this = self.0.borrow();
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write!(f, "{}", this);
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Ok(())
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}
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}
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//transparent
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impl Display for FileRef {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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// f.debug_tuple("FileRef").field(self.0.borrow().deref()).finish()
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let this = self.0.borrow();
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write!(f, "{}", this);
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Ok(())
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}
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}
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impl Display for File {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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// f.debug_struct("File")
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// .field("name", &self.name)
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// .field("size", &self.size)
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// .finish()
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write!(f, "- {} (file, size = {})", self.name, self.size);
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Ok(())
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}
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}
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impl Display for Node {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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impl FileLike for Node {
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fn get_parent(&self) -> Option<DirRef> {
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match self {
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Node::Dir(dir) => write!(f, "{}", dir),
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Node::File(file) => write!(f, "{}", file),
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Node::Dir(d) => d.get_parent(),
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Node::File(f) => f.get_parent(),
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}
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}
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fn get_name(&self) -> String {
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match self {
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Node::Dir(d) => d.get_name(),
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Node::File(f) => f.get_name(),
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}
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}
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}
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impl Display for Dir {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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writeln!(f, "- {} (dir)", self.name);
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for node in &self.children {
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//padding
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for (index, line) in format!("{}", node).lines().enumerate() {
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writeln!(f, " {line}")?;
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}
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}
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Ok(())
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}
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#[derive(Debug)]
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pub struct File {
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name: String,
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parent: WeakDirRef,
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pub size: usize,
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn dir_tree_sizes() {
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let root = DirRef::new("/".to_string());
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let a = root.add(Node::Dir(DirRef::new("a".to_string())));
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let e = a
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.get_dir()
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.unwrap()
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.add(Node::Dir(DirRef::new("e".to_string())));
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let i = e.get_dir().unwrap().new_file("i".to_string(), 584);
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let f = a.get_dir().unwrap().new_file("f".to_string(), 29116);
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let g = a.get_dir().unwrap().new_file("g".to_string(), 2557);
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let h = a.get_dir().unwrap().new_file("h.lst".to_string(), 62596);
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let b = root.new_file("b.txt".to_string(), 14848514);
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let c = root.new_file("c.txt".to_string(), 8504156);
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let d = root.add(Node::Dir(DirRef::new("a".to_string())));
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let j = d.get_dir().unwrap().new_file("j".to_string(), 4060174);
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let dlog = d.get_dir().unwrap().new_file("d.log".to_string(), 8033020);
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let dext = d.get_dir().unwrap().new_file("d.ext".to_string(), 5626152);
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let k = d.get_dir().unwrap().new_file("k".to_string(), 7214296);
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println!("{}", root);
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assert_eq!(e.get_dir().unwrap().total_size(), 584);
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assert_eq!(a.get_dir().unwrap().total_size(), 94853);
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assert_eq!(d.get_dir().unwrap().total_size(), 24933642);
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assert_eq!(root.total_size(), 48381165)
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impl FileLike for File {
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fn get_parent(&self) -> Option<DirRef> {
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Some(DirRef(self.parent.upgrade()?))
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}
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fn get_name(&self) -> String {
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self.name.clone()
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}
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}
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