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/*
This file is part of jellything (https://codeberg.org/metamuffin/jellything)
which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
Copyright (C) 2023 metamuffin <metamuffin.org>
*/
use anyhow::{anyhow, bail, Context, Ok};
use jellycommon::{DirectoryInfo, ItemInfo, CommmonInfo};
use log::info;
use std::{
ffi::OsStr,
fs::File,
os::unix::prelude::OsStrExt,
path::{Path, PathBuf},
sync::Arc,
};
pub struct Library {
pub root: Arc<Node>,
pub root_path: PathBuf,
}
#[derive(Debug, Clone)]
pub enum Node {
Directory(Arc<Directory>),
Item(Arc<Item>),
}
#[derive(Debug, Clone)]
pub struct Directory {
pub lib_path: PathBuf,
pub identifier: String,
pub info: DirectoryInfo,
pub children: Vec<Arc<Node>>,
}
#[derive(Debug, Clone)]
pub struct Item {
pub fs_path: PathBuf,
pub lib_path: PathBuf,
pub identifier: String,
pub info: ItemInfo,
}
impl Library {
pub fn open(path: &Path) -> anyhow::Result<Self> {
Ok(Self {
root_path: path.to_path_buf(),
root: Node::from_path(path.to_path_buf(), PathBuf::new(), true)
.context("indexing root")?
.into_iter()
.next()
.ok_or(anyhow!("root need directory.json"))?,
})
}
pub fn nested_path(&self, path: &Path) -> anyhow::Result<Arc<Node>> {
self.nested(path.to_str().unwrap())
}
pub fn nested(&self, path: &str) -> anyhow::Result<Arc<Node>> {
let mut n = self.root.clone();
if path.is_empty() {
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<Arc<Directory>> {
match self {
Node::Directory(d) => Ok(d.clone()),
Node::Item(_) => bail!("not a directory"),
}
}
pub fn get_item(&self) -> anyhow::Result<Arc<Item>> {
match self {
Node::Item(i) => Ok(i.clone()),
Node::Directory(_) => bail!("not an item"),
}
}
pub fn commmon(&self) -> &CommmonInfo {
match self {
Node::Directory(d) => &d.info.commmon,
Node::Item(i) => &i.info.commmon,
}
}
pub fn identifier(&self) -> &str {
match self {
Node::Directory(d) => &d.identifier,
Node::Item(i) => &i.identifier,
}
}
pub fn from_path(
path: PathBuf,
mut lib_path: PathBuf,
root: bool,
) -> anyhow::Result<Vec<Arc<Node>>> {
if path.is_dir() {
let mpath = path.join("directory.json");
let children = path.read_dir()?.filter_map(|e| {
let e = e.unwrap();
if e.path().extension() == Some(&OsStr::from_bytes(b"jelly"))
|| e.metadata().unwrap().is_dir()
{
Some(e.path())
} else {
None
}
});
if !mpath.exists() {
info!("flattening {path:?}");
Ok(children
.map(|e| Node::from_path(e, lib_path.clone(), false))
.collect::<Result<Vec<_>, _>>()?
.into_iter()
.flatten()
.collect())
} else {
let data: DirectoryInfo =
serde_json::from_reader(File::open(mpath).context("metadata missing")?)?;
let identifier = path.file_name().unwrap().to_str().unwrap().to_string();
if !root {
lib_path = lib_path.join(identifier.clone());
}
info!("scanning directory {path:?}");
let children = children
.map(|e| {
Node::from_path(e.clone(), lib_path.clone(), false)
.context(format!("loading {e:?}"))
})
.collect::<anyhow::Result<Vec<_>>>()?
.into_iter()
.flatten()
.collect();
Ok(Vec::from_iter(Some(
Node::Directory(Arc::new(Directory {
lib_path,
children,
info: data,
identifier,
}))
.into(),
)))
}
} else if path.is_file() {
info!("loading item {path:?}");
let datafile = File::open(path.clone()).context("cant load metadata")?;
let data: ItemInfo = serde_json::from_reader(datafile).context("invalid metadata")?;
let identifier = path
.file_name()
.unwrap()
.to_str()
.unwrap()
.strip_suffix(".jelly")
.unwrap()
.to_string();
Ok(Vec::from_iter(Some(
Node::Item(Arc::new(Item {
fs_path: path,
lib_path: lib_path.join(identifier.clone()),
info: data,
identifier,
}))
.into(),
)))
} else {
bail!("did somebody really put a fifo or socket in the library?!")
}
}
}
impl Item {
pub fn path(&self) -> String {
self.lib_path.to_str().unwrap().to_string()
}
}
impl Directory {
pub fn path(&self) -> String {
self.lib_path.to_str().unwrap().to_string()
}
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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