use std::path::{Path, PathBuf};
use std::sync::Arc;
use redb::{Database, ReadableDatabase, ReadableTable};
use super::{DEFAULT_FILE_TTL, FILES, THUMBNAILS, clean_redb_table, copy_to_cache};
use crate::cache::backend::FileBackend;
use crate::cache::video::{CachedFile, CachedThumbnail};
use crate::error::Result;
use crate::model::selector::FormatPreferences;
use crate::utils::is_expired;
#[derive(Debug, Clone)]
pub struct RedbFileCache {
db: Arc<Database>,
cache_dir: PathBuf,
ttl: u64,
}
impl RedbFileCache {
pub async fn new(cache_dir: PathBuf, ttl: Option<u64>) -> Result<Self> {
if !cache_dir.exists() {
tokio::fs::create_dir_all(&cache_dir).await?;
}
let db_path = cache_dir.join("files.redb");
let db = tokio::task::spawn_blocking(move || Database::create(db_path))
.await
.map_err(|e| crate::error::Error::runtime("redb open", e))?
.map_err(|e| crate::error::Error::database("open files.redb", e))?;
let db = Arc::new(db);
let db_init = db.clone();
tokio::task::spawn_blocking(move || {
let txn = db_init.begin_write()?;
{
let _ = txn.open_table(FILES)?;
}
{
let _ = txn.open_table(THUMBNAILS)?;
}
txn.commit()?;
Ok::<_, redb::Error>(())
})
.await
.map_err(|e| crate::error::Error::runtime("redb init", e))?
.map_err(|e| crate::error::Error::database("init files/thumbnails tables", e))?;
Ok(Self {
db,
cache_dir,
ttl: ttl.unwrap_or(DEFAULT_FILE_TTL),
})
}
}
impl FileBackend for RedbFileCache {
async fn get_by_hash(&self, hash: &str) -> Result<Option<(CachedFile, PathBuf)>> {
tracing::debug!(hash = hash, "🔍 Looking for file in redb cache by hash");
let db = self.db.clone();
let hash_owned = hash.to_string();
let cache_dir = self.cache_dir.clone();
let ttl = self.ttl;
tokio::task::spawn_blocking(move || {
let txn = db
.begin_read()
.map_err(|e| crate::error::Error::database("read file by hash", e))?;
let table = txn
.open_table(FILES)
.map_err(|e| crate::error::Error::database("open files table", e))?;
if let Some(entry) = table
.get(hash_owned.as_str())
.map_err(|e| crate::error::Error::database("get file by hash", e))?
{
let bytes = entry.value();
if let Ok(cached) = serde_json::from_slice::<CachedFile>(bytes)
&& !is_expired(cached.cached_at, ttl)
{
let path = cache_dir.join(&cached.relative_path);
return Ok(Some((cached, path)));
}
}
Ok(None)
})
.await
.map_err(|e| crate::error::Error::runtime("redb get file by hash", e))?
}
async fn get_by_video_and_format(&self, video_id: &str, format_id: &str) -> Result<Option<(CachedFile, PathBuf)>> {
tracing::debug!(
video_id = video_id,
format_id = format_id,
"🔍 Looking for file by video and format in redb cache"
);
let db = self.db.clone();
let vid = video_id.to_string();
let fid = format_id.to_string();
let cache_dir = self.cache_dir.clone();
let ttl = self.ttl;
tokio::task::spawn_blocking(move || {
let txn = db
.begin_read()
.map_err(|e| crate::error::Error::database("read file by video+format", e))?;
let table = txn
.open_table(FILES)
.map_err(|e| crate::error::Error::database("open files table", e))?;
let iter = table
.iter()
.map_err(|e| crate::error::Error::database("iterate files table", e))?;
for (_key, val) in iter.flatten() {
let bytes = val.value();
if let Ok(cached) = serde_json::from_slice::<CachedFile>(bytes)
&& cached.video_id.as_deref() == Some(&vid)
&& cached.format_id.as_deref() == Some(&fid)
&& !is_expired(cached.cached_at, ttl)
{
let path = cache_dir.join(&cached.relative_path);
return Ok(Some((cached, path)));
}
}
Ok(None)
})
.await
.map_err(|e| crate::error::Error::runtime("redb get file by video+format", e))?
}
async fn get_by_video_and_preferences(
&self,
video_id: &str,
preferences: &FormatPreferences,
) -> Result<Option<(CachedFile, PathBuf)>> {
tracing::debug!(video_id = video_id, "🔍 Looking for file by preferences in redb cache");
let db = self.db.clone();
let vid = video_id.to_string();
let cache_dir = self.cache_dir.clone();
let ttl = self.ttl;
let prefs = preferences.clone();
tokio::task::spawn_blocking(move || {
let txn = db
.begin_read()
.map_err(|e| crate::error::Error::database("read file by preferences", e))?;
let table = txn
.open_table(FILES)
.map_err(|e| crate::error::Error::database("open files table", e))?;
let iter = table
.iter()
.map_err(|e| crate::error::Error::database("iterate files table", e))?;
for (_key, val) in iter.flatten() {
let bytes = val.value();
if let Ok(cached) = serde_json::from_slice::<CachedFile>(bytes)
&& cached.video_id.as_deref() == Some(&vid)
&& cached.matches_preferences(&prefs)
&& !is_expired(cached.cached_at, ttl)
{
let path = cache_dir.join(&cached.relative_path);
return Ok(Some((cached, path)));
}
}
Ok(None)
})
.await
.map_err(|e| crate::error::Error::runtime("redb get file by preferences", e))?
}
async fn put(&self, file: CachedFile, source_path: &Path) -> Result<PathBuf> {
tracing::debug!(
file_id = file.id,
filename = file.filename,
"⚙️ Caching file to redb backend"
);
let dest_path = copy_to_cache(&self.cache_dir, &file.relative_path, source_path).await?;
let db = self.db.clone();
let ret_path = dest_path.clone();
tokio::task::spawn_blocking(move || {
let bytes = serde_json::to_vec(&file)?;
let txn = db
.begin_write()
.map_err(|e| crate::error::Error::database("write file", e))?;
{
let mut table = txn
.open_table(FILES)
.map_err(|e| crate::error::Error::database("open files table", e))?;
table
.insert(file.id.as_str(), bytes.as_slice())
.map_err(|e| crate::error::Error::database("insert file", e))?;
}
txn.commit()
.map_err(|e| crate::error::Error::database("commit file", e))?;
Ok::<_, crate::error::Error>(())
})
.await
.map_err(|e| crate::error::Error::runtime("redb put file", e))??;
Ok(ret_path)
}
async fn remove(&self, id: &str) -> Result<()> {
tracing::debug!(file_id = id, "⚙️ Removing file from redb cache");
let db = self.db.clone();
let id_owned = id.to_string();
let cache_dir = self.cache_dir.clone();
tokio::task::spawn_blocking(move || {
let txn = db
.begin_write()
.map_err(|e| crate::error::Error::database("write file remove", e))?;
{
let mut table = txn
.open_table(FILES)
.map_err(|e| crate::error::Error::database("open files table", e))?;
if let Some(entry) = table
.get(id_owned.as_str())
.map_err(|e| crate::error::Error::database("get file for remove", e))?
{
let bytes = entry.value();
if let Ok(cached) = serde_json::from_slice::<CachedFile>(bytes) {
let path = cache_dir.join(&cached.relative_path);
let _ = std::fs::remove_file(path);
}
}
table
.remove(id_owned.as_str())
.map_err(|e| crate::error::Error::database("remove file", e))?;
}
txn.commit()
.map_err(|e| crate::error::Error::database("commit file remove", e))?;
Ok(())
})
.await
.map_err(|e| crate::error::Error::runtime("redb remove file", e))?
}
async fn clean(&self) -> Result<()> {
let db = self.db.clone();
let ttl = self.ttl;
let cache_dir = self.cache_dir.clone();
tokio::task::spawn_blocking(move || {
clean_redb_table(&db, FILES, ttl, &cache_dir, "file")?;
clean_redb_table(&db, THUMBNAILS, ttl, &cache_dir, "thumbnail")?;
Ok(())
})
.await
.map_err(|e| crate::error::Error::runtime("redb clean files", e))?
}
async fn get_thumbnail_by_video_id(&self, video_id: &str) -> Result<Option<(CachedThumbnail, PathBuf)>> {
tracing::debug!(
video_id = video_id,
"🔍 Looking for thumbnail by video ID in redb cache"
);
let db = self.db.clone();
let vid = video_id.to_string();
let cache_dir = self.cache_dir.clone();
let ttl = self.ttl;
tokio::task::spawn_blocking(move || {
let txn = db
.begin_read()
.map_err(|e| crate::error::Error::database("read thumbnail by video", e))?;
let table = txn
.open_table(THUMBNAILS)
.map_err(|e| crate::error::Error::database("open thumbnails table", e))?;
let iter = table
.iter()
.map_err(|e| crate::error::Error::database("iterate thumbnails table", e))?;
for (_key, val) in iter.flatten() {
let bytes = val.value();
if let Ok(cached) = serde_json::from_slice::<CachedThumbnail>(bytes)
&& cached.video_id == vid
&& !is_expired(cached.cached_at, ttl)
{
let path = cache_dir.join(&cached.relative_path);
return Ok(Some((cached, path)));
}
}
Ok(None)
})
.await
.map_err(|e| crate::error::Error::runtime("redb get thumbnail by video", e))?
}
async fn put_thumbnail(&self, thumbnail: CachedThumbnail, source_path: &Path) -> Result<PathBuf> {
tracing::debug!(
thumbnail_id = thumbnail.id,
video_id = thumbnail.video_id,
"⚙️ Caching thumbnail to redb backend"
);
let dest_path = copy_to_cache(&self.cache_dir, &thumbnail.relative_path, source_path).await?;
let db = self.db.clone();
let ret_path = dest_path.clone();
tokio::task::spawn_blocking(move || {
let bytes = serde_json::to_vec(&thumbnail)?;
let txn = db
.begin_write()
.map_err(|e| crate::error::Error::database("write thumbnail", e))?;
{
let mut table = txn
.open_table(THUMBNAILS)
.map_err(|e| crate::error::Error::database("open thumbnails table", e))?;
table
.insert(thumbnail.id.as_str(), bytes.as_slice())
.map_err(|e| crate::error::Error::database("insert thumbnail", e))?;
}
txn.commit()
.map_err(|e| crate::error::Error::database("commit thumbnail", e))?;
Ok::<_, crate::error::Error>(())
})
.await
.map_err(|e| crate::error::Error::runtime("redb put thumbnail", e))??;
Ok(ret_path)
}
async fn get_subtitle_by_language(&self, video_id: &str, language: &str) -> Result<Option<(CachedFile, PathBuf)>> {
tracing::debug!(
video_id = video_id,
language = language,
"🔍 Looking for subtitle in redb cache"
);
let db = self.db.clone();
let vid = video_id.to_string();
let lang = language.to_string();
let cache_dir = self.cache_dir.clone();
let ttl = self.ttl;
tokio::task::spawn_blocking(move || {
let txn = db
.begin_read()
.map_err(|e| crate::error::Error::database("read subtitle by language", e))?;
let table = txn
.open_table(FILES)
.map_err(|e| crate::error::Error::database("open files table", e))?;
let iter = table
.iter()
.map_err(|e| crate::error::Error::database("iterate files table", e))?;
for (_key, val) in iter.flatten() {
let bytes = val.value();
if let Ok(cached) = serde_json::from_slice::<CachedFile>(bytes)
&& cached.video_id.as_deref() == Some(&vid)
&& cached.language_code.as_deref() == Some(&lang)
&& !is_expired(cached.cached_at, ttl)
{
let path = cache_dir.join(&cached.relative_path);
return Ok(Some((cached, path)));
}
}
Ok(None)
})
.await
.map_err(|e| crate::error::Error::runtime("redb get subtitle by language", e))?
}
}