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use crate::metadata::{DirectoryInfo, ItemInfo};
use anyhow::{anyhow, bail, Context, Ok};
use std::{ffi::OsStr, fs::File, path::PathBuf, sync::Arc};
pub struct Library {
root: Arc<Node>,
}
#[derive(Debug, Clone)]
pub enum Node {
Directory(Arc<Directory>),
Item(Arc<Item>),
}
#[derive(Debug, Clone)]
pub struct Directory {
pub identifier: String,
pub data: DirectoryInfo,
pub children: Vec<Arc<Node>>,
}
#[derive(Debug, Clone)]
pub struct Item {
pub identifier: String,
pub data: ItemInfo,
}
impl Library {
pub fn open(path: &str) -> anyhow::Result<Self> {
Ok(Self {
root: Node::from_path(path.into()).context("indexing root")?,
})
}
pub fn nested(&self, path: &str) -> anyhow::Result<Arc<Node>> {
let mut n = self.root.clone();
if path == "" {
return Ok(n);
}
for seg in path.split("/") {
n = n
.get_directory()?
.child_by_ident(seg)
.ok_or(anyhow!("does not exist"))?;
}
Ok(n)
}
}
impl Node {
pub fn get_directory(&self) -> anyhow::Result<&Directory> {
match self {
Node::Directory(d) => Ok(d),
Node::Item(_) => bail!("not a directory"),
}
}
pub fn title(&self) -> &str {
match self {
Node::Directory(d) => &d.data.name,
Node::Item(i) => &i.data.title,
}
}
pub fn identifier(&self) -> &str {
match self {
Node::Directory(d) => &d.identifier,
Node::Item(i) => &i.identifier,
}
}
pub fn from_path(path: PathBuf) -> anyhow::Result<Arc<Node>> {
if path.is_dir() {
let mpath = path.join("directory.json");
let data: DirectoryInfo =
serde_json::from_reader(File::open(mpath).context("metadata missing")?)?;
let children = path
.read_dir()?
.map(|e| e.unwrap().path())
.filter(|e| e.extension() != Some(OsStr::new("json")))
.map(|e| Node::from_path(e.clone()).context(format!("loading {e:?}")))
.into_iter()
.collect::<anyhow::Result<Vec<_>>>()?;
Ok(Node::Directory(Arc::new(Directory {
children,
data,
identifier: path.file_name().unwrap().to_str().unwrap().to_string(),
}))
.into())
} else if path.is_file() {
let mpath = path.clone().with_extension("metadata.json");
let datafile = File::open(mpath.clone())
.context(format!("metadata missing, tried path {mpath:?}"))?;
let data: ItemInfo = serde_json::from_reader(datafile).context("invalid metadata")?;
Ok(Node::Item(Arc::new(Item {
data,
identifier: path
.with_extension("")
.file_name()
.unwrap()
.to_str()
.unwrap()
.to_string(),
}))
.into())
} else {
bail!("did somebody really put a fifo or socket in the library?!")
}
}
}
impl Directory {
pub fn child_by_ident(&self, i: &str) -> Option<Arc<Node>> {
self.children
.iter()
.find(|e| e.identifier() == i)
.map(|e| e.to_owned())
}
}
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