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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 crate::{database::Database, federation::Federation, CONF};
use anyhow::{anyhow, bail, Context, Ok};
use async_recursion::async_recursion;
use jellycommon::{MediaSource, Node, NodePrivate, RemoteImportOptions};
use log::{error, info};
use std::{ffi::OsStr, fs::File, os::unix::prelude::OsStrExt, path::PathBuf, sync::LazyLock};
use tokio::sync::Semaphore;
static IMPORT_SEM: LazyLock<Semaphore> = LazyLock::new(|| Semaphore::new(1));
pub async fn import(db: &Database, fed: &Federation) -> anyhow::Result<()> {
info!("clearing node tree");
let permit = IMPORT_SEM.try_acquire()?;
db.node.clear()?;
info!("importing...");
let (_, errs) = import_path(CONF.library_path.clone(), db, fed, None)
.await
.context("indexing")?;
info!("import completed");
drop(permit);
if errs == 0 {
Ok(())
} else {
Err(anyhow!(
"partial import, {errs} errors occured; see server log"
))
}
}
#[async_recursion]
pub async fn import_path(
path: PathBuf,
db: &Database,
fed: &Federation,
parent: Option<String>,
) -> anyhow::Result<(Vec<String>, usize)> {
if path.is_dir() {
let mpath = path.join("directory.json");
let children_paths = path.read_dir()?.map(Result::unwrap).filter_map(|e| {
if e.path().extension() == Some(&OsStr::from_bytes(b"jelly"))
|| e.metadata().unwrap().is_dir()
{
Some(e.path())
} else {
None
}
});
let identifier = path.file_name().unwrap().to_str().unwrap().to_string();
let mut children_ids = Vec::new();
let mut errs = 0;
for p in children_paths {
let k = import_path(p, db, fed, Some(identifier.clone())).await;
match k {
core::result::Result::Ok((els, errs2)) => {
errs += errs2;
children_ids.extend(els)
}
Err(e) => {
errs += 1;
error!("import failed: {e:?}")
}
}
}
if mpath.exists() {
let mut data: Node =
serde_json::from_reader(File::open(mpath).context("metadata missing")?)?;
data.public.children = children_ids;
data.public.parent = parent;
info!("adding {identifier}");
db.node.insert(&identifier, &data)?;
Ok((vec![identifier], errs))
} else {
Ok((children_ids, errs))
}
} else if path.is_file() {
info!("loading {path:?}");
let datafile = File::open(path.clone()).context("cant load metadata")?;
let mut data: Node = serde_json::from_reader(datafile).context("invalid metadata")?;
let identifier = path
.file_name()
.unwrap()
.to_str()
.unwrap()
.strip_suffix(".jelly")
.unwrap()
.to_string();
if let Some(io) = data.private.import.take() {
let title = data.public.title;
data = import_remote(io, db, fed)
.await
.context("federated import")?;
data.public.title = title;
}
info!("adding {identifier}");
data.public.parent = parent;
db.node.insert(&identifier, &data)?;
Ok((vec![identifier], 0))
} else {
bail!("did somebody really put a fifo or socket in the library?!")
}
}
async fn import_remote(
opts: RemoteImportOptions,
db: &Database,
fed: &Federation,
) -> anyhow::Result<Node> {
let sess = fed
.get_session(&opts.host)
.await
.context("creating session")?;
let node = sess.node(&opts.id).await.context("fetching remote node")?;
if !node.children.is_empty() {
todo!()
}
let node = Node {
public: node,
private: NodePrivate {
backdrop: None,
poster: None,
import: None,
source: Some(MediaSource::Remote {
host: opts.host,
remote_id: opts.id,
}),
},
};
Ok(node)
}
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