use crate::config::RequiredSledRepo; use crate::{config::Repository, details::Details, store::Identifier}; use futures_util::Stream; use tracing::debug; use uuid::Uuid; mod old; pub(crate) mod sled; #[derive(Clone, Debug)] pub(crate) enum Repo { Sled(self::sled::SledRepo), } #[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)] enum MaybeUuid { Uuid(Uuid), Name(String), } #[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)] pub(crate) struct Alias { id: MaybeUuid, extension: Option, } #[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash)] pub(crate) struct DeleteToken { id: MaybeUuid, } pub(crate) struct AlreadyExists; #[async_trait::async_trait(?Send)] pub(crate) trait SettingsRepo { type Bytes: AsRef<[u8]> + From>; type Error: std::error::Error + Send + Sync + 'static; async fn set(&self, key: &'static [u8], value: Self::Bytes) -> Result<(), Self::Error>; async fn get(&self, key: &'static [u8]) -> Result, Self::Error>; async fn remove(&self, key: &'static [u8]) -> Result<(), Self::Error>; } #[async_trait::async_trait(?Send)] pub(crate) trait IdentifierRepo { type Error: std::error::Error + Send + Sync + 'static; async fn relate_details( &self, identifier: &I, details: &Details, ) -> Result<(), Self::Error>; async fn details(&self, identifier: &I) -> Result, Self::Error>; async fn cleanup(&self, identifier: &I) -> Result<(), Self::Error>; } #[async_trait::async_trait(?Send)] pub(crate) trait HashRepo { type Bytes: AsRef<[u8]> + From>; type Error: std::error::Error + Send + Sync + 'static; type Stream: Stream>; async fn hashes(&self) -> Self::Stream; async fn create(&self, hash: Self::Bytes) -> Result, Self::Error>; async fn relate_alias(&self, hash: Self::Bytes, alias: &Alias) -> Result<(), Self::Error>; async fn remove_alias(&self, hash: Self::Bytes, alias: &Alias) -> Result<(), Self::Error>; async fn aliases(&self, hash: Self::Bytes) -> Result, Self::Error>; async fn relate_identifier( &self, hash: Self::Bytes, identifier: &I, ) -> Result<(), Self::Error>; async fn identifier( &self, hash: Self::Bytes, ) -> Result; async fn relate_variant_identifier( &self, hash: Self::Bytes, variant: String, identifier: &I, ) -> Result<(), Self::Error>; async fn variant_identifier( &self, hash: Self::Bytes, variant: String, ) -> Result, Self::Error>; async fn variants( &self, hash: Self::Bytes, ) -> Result, Self::Error>; async fn relate_motion_identifier( &self, hash: Self::Bytes, identifier: &I, ) -> Result<(), Self::Error>; async fn motion_identifier( &self, hash: Self::Bytes, ) -> Result, Self::Error>; async fn cleanup(&self, hash: Self::Bytes) -> Result<(), Self::Error>; } #[async_trait::async_trait(?Send)] pub(crate) trait AliasRepo { type Bytes: AsRef<[u8]> + From>; type Error: std::error::Error + Send + Sync + 'static; async fn create(&self, alias: &Alias) -> Result, Self::Error>; async fn relate_delete_token( &self, alias: &Alias, delete_token: &DeleteToken, ) -> Result, Self::Error>; async fn delete_token(&self, alias: &Alias) -> Result; async fn relate_hash(&self, alias: &Alias, hash: Self::Bytes) -> Result<(), Self::Error>; async fn hash(&self, alias: &Alias) -> Result; async fn cleanup(&self, alias: &Alias) -> Result<(), Self::Error>; } impl Repo { pub(crate) fn open(config: Repository) -> anyhow::Result { match config { Repository::Sled(RequiredSledRepo { mut path, cache_capacity, }) => { path.push("v0.4.0-alpha.1"); let db = ::sled::Config::new() .cache_capacity(cache_capacity) .path(path) .open()?; Ok(Self::Sled(self::sled::SledRepo::new(db)?)) } } } #[tracing::instrument(skip_all)] pub(crate) async fn from_db(&self, db: ::sled::Db) -> anyhow::Result<()> { if self.has_migrated().await? { return Ok(()); } let old = self::old::Old::open(db)?; for hash in old.hashes() { match self { Self::Sled(repo) => { if let Err(e) = migrate_hash(repo, &old, hash).await { tracing::error!("Failed to migrate hash: {}", e); } } } } self.mark_migrated().await?; Ok(()) } async fn has_migrated(&self) -> anyhow::Result { match self { Self::Sled(repo) => Ok(repo.get(REPO_MIGRATION_O1).await?.is_some()), } } async fn mark_migrated(&self) -> anyhow::Result<()> { match self { Self::Sled(repo) => { repo.set(REPO_MIGRATION_O1, b"1".to_vec().into()).await?; } } Ok(()) } } const REPO_MIGRATION_O1: &[u8] = b"repo-migration-01"; const STORE_MIGRATION_PROGRESS: &[u8] = b"store-migration-progress"; const GENERATOR_KEY: &[u8] = b"last-path"; async fn migrate_hash(repo: &T, old: &old::Old, hash: ::sled::IVec) -> anyhow::Result<()> where T: IdentifierRepo + HashRepo + AliasRepo + SettingsRepo, { if HashRepo::create(repo, hash.to_vec().into()).await?.is_err() { debug!("Duplicate hash detected"); return Ok(()); } let main_ident = old.main_identifier(&hash)?.to_vec(); repo.relate_identifier(hash.to_vec().into(), &main_ident) .await?; for alias in old.aliases(&hash) { if let Ok(Ok(())) = AliasRepo::create(repo, &alias).await { let _ = repo.relate_alias(hash.to_vec().into(), &alias).await; let _ = repo.relate_hash(&alias, hash.to_vec().into()).await; if let Ok(Some(delete_token)) = old.delete_token(&alias) { let _ = repo.relate_delete_token(&alias, &delete_token).await; } } } if let Ok(Some(identifier)) = old.motion_identifier(&hash) { let _ = repo .relate_motion_identifier(hash.to_vec().into(), &identifier.to_vec()) .await; } for (variant_path, identifier) in old.variants(&hash)? { let variant = variant_path.to_string_lossy().to_string(); let _ = repo .relate_variant_identifier(hash.to_vec().into(), variant, &identifier.to_vec()) .await; } for (identifier, details) in old.details(&hash)? { let _ = repo.relate_details(&identifier.to_vec(), &details).await; } if let Ok(Some(value)) = old.setting(STORE_MIGRATION_PROGRESS) { repo.set(STORE_MIGRATION_PROGRESS, value.to_vec().into()) .await?; } if let Ok(Some(value)) = old.setting(GENERATOR_KEY) { repo.set(GENERATOR_KEY, value.to_vec().into()).await?; } Ok(()) } impl MaybeUuid { fn from_str(s: &str) -> Self { if let Ok(uuid) = Uuid::parse_str(s) { MaybeUuid::Uuid(uuid) } else { MaybeUuid::Name(s.into()) } } fn as_bytes(&self) -> &[u8] { match self { Self::Uuid(uuid) => &uuid.as_bytes()[..], Self::Name(name) => name.as_bytes(), } } } fn split_at_dot(s: &str) -> Option<(&str, &str)> { let index = s.find('.')?; Some(s.split_at(index)) } impl Alias { pub(crate) fn generate(extension: String) -> Self { Alias { id: MaybeUuid::Uuid(Uuid::new_v4()), extension: Some(extension), } } pub(crate) fn from_existing(alias: &str) -> Self { if let Some((start, end)) = split_at_dot(alias) { Alias { id: MaybeUuid::from_str(start), extension: Some(end.into()), } } else { Alias { id: MaybeUuid::from_str(alias), extension: None, } } } pub(crate) fn extension(&self) -> Option<&str> { self.extension.as_deref() } fn to_bytes(&self) -> Vec { let mut v = self.id.as_bytes().to_vec(); if let Some(ext) = self.extension() { v.extend_from_slice(ext.as_bytes()); } v } fn from_slice(bytes: &[u8]) -> Option { if let Ok(s) = std::str::from_utf8(bytes) { Some(Self::from_existing(s)) } else if bytes.len() >= 16 { let id = Uuid::from_slice(&bytes[0..16]).expect("Already checked length"); let extension = if bytes.len() > 16 { Some(String::from_utf8_lossy(&bytes[16..]).to_string()) } else { None }; Some(Self { id: MaybeUuid::Uuid(id), extension, }) } else { None } } } impl DeleteToken { pub(crate) fn from_existing(existing: &str) -> Self { if let Ok(uuid) = Uuid::parse_str(existing) { DeleteToken { id: MaybeUuid::Uuid(uuid), } } else { DeleteToken { id: MaybeUuid::Name(existing.into()), } } } pub(crate) fn generate() -> Self { Self { id: MaybeUuid::Uuid(Uuid::new_v4()), } } fn to_bytes(&self) -> Vec { self.id.as_bytes().to_vec() } fn from_slice(bytes: &[u8]) -> Option { if let Ok(s) = std::str::from_utf8(bytes) { Some(DeleteToken::from_existing(s)) } else if bytes.len() == 16 { Some(DeleteToken { id: MaybeUuid::Uuid(Uuid::from_slice(bytes).ok()?), }) } else { None } } } impl std::fmt::Display for MaybeUuid { fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { match self { Self::Uuid(id) => write!(f, "{}", id), Self::Name(name) => write!(f, "{}", name), } } } impl std::fmt::Display for DeleteToken { fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { write!(f, "{}", self.id) } } impl std::fmt::Display for Alias { fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { if let Some(ext) = self.extension() { write!(f, "{}{}", self.id, ext) } else { write!(f, "{}", self.id) } } } impl Identifier for Vec { type Error = std::convert::Infallible; fn from_bytes(bytes: Vec) -> Result where Self: Sized, { Ok(bytes) } fn to_bytes(&self) -> Result, Self::Error> { Ok(self.clone()) } } #[cfg(test)] mod tests { use super::{Alias, DeleteToken, MaybeUuid, Uuid}; #[test] fn string_delete_token() { let delete_token = DeleteToken::from_existing("blah"); assert_eq!( delete_token, DeleteToken { id: MaybeUuid::Name(String::from("blah")) } ) } #[test] fn uuid_string_delete_token() { let uuid = Uuid::new_v4(); let delete_token = DeleteToken::from_existing(&uuid.to_string()); assert_eq!( delete_token, DeleteToken { id: MaybeUuid::Uuid(uuid), } ) } #[test] fn bytes_delete_token() { let delete_token = DeleteToken::from_slice(b"blah").unwrap(); assert_eq!( delete_token, DeleteToken { id: MaybeUuid::Name(String::from("blah")) } ) } #[test] fn uuid_bytes_delete_token() { let uuid = Uuid::new_v4(); let delete_token = DeleteToken::from_slice(&uuid.as_bytes()[..]).unwrap(); assert_eq!( delete_token, DeleteToken { id: MaybeUuid::Uuid(uuid), } ) } #[test] fn uuid_bytes_string_delete_token() { let uuid = Uuid::new_v4(); let delete_token = DeleteToken::from_slice(uuid.to_string().as_bytes()).unwrap(); assert_eq!( delete_token, DeleteToken { id: MaybeUuid::Uuid(uuid), } ) } #[test] fn string_alias() { let alias = Alias::from_existing("blah"); assert_eq!( alias, Alias { id: MaybeUuid::Name(String::from("blah")), extension: None } ); } #[test] fn string_alias_ext() { let alias = Alias::from_existing("blah.mp4"); assert_eq!( alias, Alias { id: MaybeUuid::Name(String::from("blah")), extension: Some(String::from(".mp4")), } ); } #[test] fn uuid_string_alias() { let uuid = Uuid::new_v4(); let alias = Alias::from_existing(&uuid.to_string()); assert_eq!( alias, Alias { id: MaybeUuid::Uuid(uuid), extension: None, } ) } #[test] fn uuid_string_alias_ext() { let uuid = Uuid::new_v4(); let alias_str = format!("{}.mp4", uuid); let alias = Alias::from_existing(&alias_str); assert_eq!( alias, Alias { id: MaybeUuid::Uuid(uuid), extension: Some(String::from(".mp4")), } ) } #[test] fn bytes_alias() { let alias = Alias::from_slice(b"blah").unwrap(); assert_eq!( alias, Alias { id: MaybeUuid::Name(String::from("blah")), extension: None } ); } #[test] fn bytes_alias_ext() { let alias = Alias::from_slice(b"blah.mp4").unwrap(); assert_eq!( alias, Alias { id: MaybeUuid::Name(String::from("blah")), extension: Some(String::from(".mp4")), } ); } #[test] fn uuid_bytes_alias() { let uuid = Uuid::new_v4(); let alias = Alias::from_slice(&uuid.as_bytes()[..]).unwrap(); assert_eq!( alias, Alias { id: MaybeUuid::Uuid(uuid), extension: None, } ) } #[test] fn uuid_bytes_string_alias() { let uuid = Uuid::new_v4(); let alias = Alias::from_slice(uuid.to_string().as_bytes()).unwrap(); assert_eq!( alias, Alias { id: MaybeUuid::Uuid(uuid), extension: None, } ) } #[test] fn uuid_bytes_alias_ext() { let uuid = Uuid::new_v4(); let mut alias_bytes = uuid.as_bytes().to_vec(); alias_bytes.extend_from_slice(b".mp4"); let alias = Alias::from_slice(&alias_bytes).unwrap(); assert_eq!( alias, Alias { id: MaybeUuid::Uuid(uuid), extension: Some(String::from(".mp4")), } ) } #[test] fn uuid_bytes_string_alias_ext() { let uuid = Uuid::new_v4(); let alias_str = format!("{}.mp4", uuid); let alias = Alias::from_slice(alias_str.as_bytes()).unwrap(); assert_eq!( alias, Alias { id: MaybeUuid::Uuid(uuid), extension: Some(String::from(".mp4")), } ) } }