2022-04-28 05:13:14 -04:00
|
|
|
use std::{collections::HashMap, io::ErrorKind};
|
|
|
|
|
2022-04-28 05:18:35 -04:00
|
|
|
use log::{error, info};
|
|
|
|
use tokio::{
|
|
|
|
fs::File,
|
|
|
|
io::{AsyncReadExt, AsyncWriteExt},
|
|
|
|
};
|
2022-04-28 05:13:14 -04:00
|
|
|
|
2022-04-28 05:18:35 -04:00
|
|
|
use crate::{storage_dir, DownloadableFile};
|
2022-04-28 05:13:14 -04:00
|
|
|
|
|
|
|
const STATE_FILE_NAME: &str = "files.json";
|
|
|
|
|
|
|
|
pub(crate) mod timestamp {
|
|
|
|
use core::fmt;
|
|
|
|
|
2022-04-28 05:18:35 -04:00
|
|
|
use serde::{de::Visitor, Deserializer, Serializer};
|
2022-04-28 05:13:14 -04:00
|
|
|
use time::OffsetDateTime;
|
|
|
|
|
2022-04-28 05:18:35 -04:00
|
|
|
pub(crate) fn serialize<S: Serializer>(
|
|
|
|
time: &OffsetDateTime,
|
|
|
|
ser: S,
|
|
|
|
) -> Result<S::Ok, S::Error> {
|
2022-04-28 05:13:14 -04:00
|
|
|
ser.serialize_i64(time.unix_timestamp())
|
|
|
|
}
|
|
|
|
|
|
|
|
struct I64Visitor;
|
|
|
|
|
|
|
|
impl<'de> Visitor<'de> for I64Visitor {
|
|
|
|
type Value = i64;
|
|
|
|
|
|
|
|
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
|
|
|
|
write!(formatter, "a signed integer")
|
|
|
|
}
|
|
|
|
|
|
|
|
fn visit_i64<E>(self, v: i64) -> Result<Self::Value, E> {
|
|
|
|
Ok(v)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2022-04-28 05:18:35 -04:00
|
|
|
pub(crate) fn deserialize<'de, D: Deserializer<'de>>(
|
|
|
|
de: D,
|
|
|
|
) -> Result<OffsetDateTime, D::Error> {
|
|
|
|
Ok(
|
|
|
|
OffsetDateTime::from_unix_timestamp(de.deserialize_i64(I64Visitor)?)
|
|
|
|
.unwrap_or_else(|_| OffsetDateTime::now_utc()),
|
|
|
|
)
|
2022-04-28 05:13:14 -04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub(crate) struct PersistentState(HashMap<String, DownloadableFile>);
|
|
|
|
impl PersistentState {
|
|
|
|
pub(crate) async fn load() -> std::io::Result<Self> {
|
|
|
|
let open_result = File::open(storage_dir().join(STATE_FILE_NAME)).await;
|
|
|
|
match open_result {
|
|
|
|
Ok(mut f) => {
|
|
|
|
let mut buf = String::new();
|
|
|
|
f.read_to_string(&mut buf).await?;
|
|
|
|
let map: HashMap<String, DownloadableFile> = serde_json::from_str(&buf)?;
|
|
|
|
info!("Loaded {} file entries from persistent storage", map.len());
|
|
|
|
let mut filtered: HashMap<String, DownloadableFile> = HashMap::new();
|
|
|
|
for (key, info) in map.into_iter() {
|
|
|
|
if !crate::util::is_ascii_alphanumeric(&key) {
|
|
|
|
error!("Invalid key in persistent storage: {}", key);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
let file = if let Ok(f) = File::open(storage_dir().join(&key)).await {
|
|
|
|
f
|
|
|
|
} else {
|
2022-04-28 05:18:35 -04:00
|
|
|
error!(
|
|
|
|
"Unable to open file {} referenced in persistent storage",
|
|
|
|
key
|
|
|
|
);
|
2022-04-28 05:13:14 -04:00
|
|
|
continue;
|
|
|
|
};
|
|
|
|
let metadata = if let Ok(md) = file.metadata().await {
|
|
|
|
md
|
|
|
|
} else {
|
2022-04-28 05:18:35 -04:00
|
|
|
error!(
|
|
|
|
"Unable to get metadata for file {} referenced in persistent storage",
|
|
|
|
key
|
|
|
|
);
|
2022-04-28 05:13:14 -04:00
|
|
|
continue;
|
|
|
|
};
|
|
|
|
if metadata.len() != info.size {
|
|
|
|
error!("Mismatched file size for file {} referenced in persistent storage: expected {}, found {}", key, info.size, metadata.len());
|
2022-04-28 05:18:35 -04:00
|
|
|
continue;
|
2022-04-28 05:13:14 -04:00
|
|
|
}
|
|
|
|
filtered.insert(key, info);
|
|
|
|
}
|
|
|
|
Ok(Self(filtered))
|
|
|
|
}
|
|
|
|
Err(e) => {
|
|
|
|
if let ErrorKind::NotFound = e.kind() {
|
|
|
|
Ok(Self(HashMap::new()))
|
|
|
|
} else {
|
|
|
|
Err(e)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
async fn save(&mut self) -> std::io::Result<()> {
|
2022-04-28 05:18:35 -04:00
|
|
|
File::create(storage_dir().join(STATE_FILE_NAME))
|
|
|
|
.await?
|
|
|
|
.write_all(&serde_json::to_vec_pretty(&self.0)?)
|
|
|
|
.await
|
2022-04-28 05:13:14 -04:00
|
|
|
}
|
|
|
|
|
2022-04-28 05:18:35 -04:00
|
|
|
pub(crate) async fn add_file(
|
|
|
|
&mut self,
|
|
|
|
key: String,
|
|
|
|
file: DownloadableFile,
|
|
|
|
) -> std::io::Result<()> {
|
2022-04-28 05:13:14 -04:00
|
|
|
self.0.insert(key, file);
|
|
|
|
self.save().await
|
|
|
|
}
|
|
|
|
|
|
|
|
pub(crate) fn lookup_file(&self, key: &str) -> Option<DownloadableFile> {
|
2022-04-28 05:18:35 -04:00
|
|
|
self.0.get(key).cloned()
|
2022-04-28 05:13:14 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
pub(crate) async fn remove_file(&mut self, key: &str) -> std::io::Result<()> {
|
|
|
|
self.0.remove(key);
|
|
|
|
self.save().await
|
|
|
|
}
|
|
|
|
|
|
|
|
pub(crate) fn remove_uploader(&mut self, key: &str) {
|
|
|
|
if let Some(f) = self.0.get_mut(key) {
|
|
|
|
f.uploader.take();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|