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use std::{fs::File, path::PathBuf, str::FromStr, sync::Arc};
use anyhow::{bail, Context, Ok};
use chashmap::CHashMap;
use serde::{Deserialize, Serialize};
pub struct Library {
path: PathBuf,
cache: CHashMap<String, LibNode>, // TODO
}
#[derive(Debug, Clone)]
pub enum LibNode {
Directory(Arc<LibDirectory>),
Item(Arc<LibItem>),
}
#[derive(Debug, Clone)]
pub struct LibDirectory {
pub path: PathBuf,
pub child_names: Vec<String>,
pub data: LibDirectoryData,
}
#[derive(Debug, Clone)]
pub struct LibItem {
pub data: LibItemData,
}
#[derive(Debug, Clone, Deserialize, Serialize)]
pub struct LibDirectoryData {
pub name: String,
}
#[derive(Debug, Clone, Deserialize, Serialize)]
pub struct LibItemData {
title: String,
}
impl Library {
pub fn open(path: &str) -> anyhow::Result<Self> {
Ok(Self {
path: PathBuf::from_str(path).unwrap(),
cache: CHashMap::new(),
})
}
pub fn root(&self) -> anyhow::Result<Arc<LibNode>> {
LibNode::from_path(self.path.clone())
}
pub fn nested(&self, path: &str) -> anyhow::Result<Arc<LibNode>> {
let mut n = self.root()?;
if path == "" {
return Ok(n);
}
for seg in path.split("/") {
n = n.get_directory()?.get_child(seg)?
}
Ok(n)
}
}
impl LibNode {
pub fn get_directory(&self) -> anyhow::Result<&LibDirectory> {
match self {
LibNode::Directory(d) => Ok(d),
LibNode::Item(_) => bail!("not a directory"),
}
}
pub fn title(&self) -> &str {
match self {
LibNode::Directory(d) => &d.data.name,
LibNode::Item(i) => &i.data.title,
}
}
pub fn from_path(path: PathBuf) -> anyhow::Result<Arc<LibNode>> {
if path.is_dir() {
let mpath = path.join("directory.json");
let data: LibDirectoryData =
serde_json::from_reader(File::open(mpath).context("metadata missing")?)?;
let child_names = path
.read_dir()?
.map(|e| e.unwrap().file_name().to_str().unwrap().to_string())
.filter(|e| !e.ends_with(".json"))
.collect();
Ok(LibNode::Directory(Arc::new(LibDirectory {
path,
child_names,
data,
}))
.into())
} else if path.is_file() {
let mpath = path.clone().with_extension("metadata.json");
let data: LibItemData =
serde_json::from_reader(File::open(mpath).context("metadata missing")?)
.context("invalid metadata")?;
Ok(LibNode::Item(Arc::new(LibItem { data })).into())
} else {
bail!("did somebody really put a fifo or socket in the library?!")
}
}
}
impl LibDirectory {
pub fn get_child(&self, p: &str) -> anyhow::Result<Arc<LibNode>> {
if p.contains("..") || p.starts_with("/") {
bail!("no! dont do that.")
}
let path = self.path.join(p);
// if !path.exists() {bail!("does not exist");}
LibNode::from_path(path)
}
pub fn child_nodes(&self) -> anyhow::Result<Vec<Arc<LibNode>>> {
let mut o = vec![];
for name in &self.child_names {
o.push(self.get_child(&name)?)
}
Ok(o)
}
}
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