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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) 2024 metamuffin <metamuffin.org>
*/
use bincode::{Decode, Encode};
use jellycommon::{
user::{NodeUserData, User},
ExtendedNode, Node,
};
use log::info;
use serde::{Deserialize, Serialize};
use std::{borrow::Borrow, fs::create_dir_all, ops::Deref, path::Path};
use tantivy::{
schema::{Field, Schema, FAST, STORED, TEXT},
Index, IndexReader, ReloadPolicy,
};
pub use redb::*;
pub const T_USER: TableDefinition<&str, Ser<User>> = TableDefinition::new("user");
pub const T_USER_NODE: TableDefinition<(&str, &str), Ser<NodeUserData>> =
TableDefinition::new("user_node");
pub const T_INVITE: TableDefinition<&str, Ser<()>> = TableDefinition::new("invite");
pub const T_NODE: TableDefinition<&str, Ser<Node>> = TableDefinition::new("node");
pub const T_NODE_EXTENDED: TableDefinition<&str, Ser<ExtendedNode>> =
TableDefinition::new("node-ext");
pub const T_NODE_IMPORT: TableDefinition<&str, Ser<Vec<(Vec<usize>, Node)>>> =
TableDefinition::new("node-import");
pub struct DataAcid {
pub inner: redb::Database,
pub ft_node: NodeFulltextIndex,
}
impl DataAcid {
pub fn open(path: &Path) -> Result<Self, anyhow::Error> {
info!("database");
let db = redb::Database::create(path.join("data"))?;
let ft_node = NodeFulltextIndex::new(path)?;
let r = Self { inner: db, ft_node };
{
// this creates all tables such that read operations on them do not fail.
let txn = r.begin_write()?;
drop(txn.open_table(T_INVITE)?);
drop(txn.open_table(T_USER)?);
drop(txn.open_table(T_USER_NODE)?);
drop(txn.open_table(T_NODE)?);
drop(txn.open_table(T_NODE_IMPORT)?);
drop(txn.open_table(T_NODE_EXTENDED)?);
txn.commit()?;
}
info!("ready");
Ok(r)
}
}
impl Deref for DataAcid {
type Target = Database;
fn deref(&self) -> &Self::Target {
&self.inner
}
}
pub struct NodeFulltextIndex {
pub schema: Schema,
pub reader: IndexReader,
pub id: Field,
pub title: Field,
pub description: Field,
pub index: Index,
}
impl NodeFulltextIndex {
fn new(path: &Path) -> anyhow::Result<Self> {
let mut schema = Schema::builder();
let id = schema.add_text_field("id", TEXT | STORED | FAST);
let title = schema.add_text_field("title", TEXT);
let description = schema.add_text_field("description", TEXT);
let schema = schema.build();
create_dir_all(path.join("node_fts_index"))?;
let index = Index::create_in_dir(path.join("node_fts_index"), schema.clone())?;
let reader = index
.reader_builder()
.reload_policy(ReloadPolicy::OnCommitWithDelay)
.try_into()?;
Ok(Self {
index,
reader,
schema,
id,
description,
title,
})
}
}
pub trait TableExt<Key, KeyRef, Value> {
fn get(self, db: &DataAcid, key: KeyRef) -> anyhow::Result<Option<Value>>;
fn insert(self, db: &DataAcid, key: KeyRef, value: Value) -> anyhow::Result<()>;
fn remove(self, db: &DataAcid, key: KeyRef) -> anyhow::Result<Option<Value>>;
}
impl<'a, 'b, 'c, Key, Value, KeyRef> TableExt<Key, KeyRef, Value>
for TableDefinition<'a, Key, Ser<Value>>
where
Key: Borrow<<Key as RedbValue>::SelfType<'b>> + redb::RedbKey,
Value: Encode + Decode + std::fmt::Debug + Serialize + for<'x> Deserialize<'x>,
KeyRef: Borrow<<Key as redb::RedbValue>::SelfType<'c>>,
{
fn get(self, db: &DataAcid, key: KeyRef) -> anyhow::Result<Option<Value>> {
let txn = db.inner.begin_read()?;
let table = txn.open_table(self)?;
let user = table.get(key)?.map(|v| v.value().0);
drop(table);
Ok(user)
}
fn insert(self, db: &DataAcid, key: KeyRef, value: Value) -> anyhow::Result<()> {
let txn = db.inner.begin_write()?;
let mut table = txn.open_table(self)?;
table.insert(key, Ser(value))?;
drop(table);
txn.commit()?;
Ok(())
}
fn remove(self, db: &DataAcid, key: KeyRef) -> anyhow::Result<Option<Value>> {
let txn = db.inner.begin_write()?;
let mut table = txn.open_table(self)?;
let prev = table.remove(key)?.map(|v| v.value().0);
drop(table);
txn.commit()?;
Ok(prev)
}
}
// pub trait TableIterExt<
// 'a,
// Key: redb::RedbKey + 'static,
// Value: redb::RedbValue + 'static,
// F: FnOnce(&redb::Range<'a, Key, Value>) -> anyhow::Result<T>,
// T: 'static,
// >
// {
// fn iter(self, db: &'a DataAcid, f: F) -> anyhow::Result<T>;
// }
// impl<'a, Key, Value, F, T> TableIterExt<'a, Key, Value, F, T>
// for TableDefinition<'static, Key, Value>
// where
// Key: redb::RedbKey,
// Value: redb::RedbValue,
// F: FnOnce(&redb::Range<'a, Key, Value>) -> anyhow::Result<T>,
// T: 'static,
// {
// fn iter(self, db: &DataAcid, f: F) -> anyhow::Result<T> {
// let txn = db.begin_read()?;
// let table = txn.open_table(self)?;
// let iter = table.iter()?;
// let ret = f(&iter)?;
// drop(iter);
// drop(table);
// drop(txn);
// Ok(ret)
// }
// }
#[derive(Debug)]
#[cfg(not(feature = "db_json"))]
pub struct Ser<T>(pub T);
#[cfg(not(feature = "db_json"))]
impl<T: Encode + Decode + std::fmt::Debug> RedbValue for Ser<T> {
type SelfType<'a> = Ser<T>
where
Self: 'a;
type AsBytes<'a> = Vec<u8>
where
Self: 'a;
fn fixed_width() -> Option<usize> {
None
}
fn from_bytes<'a>(data: &'a [u8]) -> Self::SelfType<'a>
where
Self: 'a,
{
Ser(bincode::decode_from_slice(data, bincode::config::legacy())
.unwrap()
.0)
}
fn as_bytes<'a, 'b: 'a>(value: &'a Self::SelfType<'b>) -> Self::AsBytes<'a>
where
Self: 'a,
Self: 'b,
{
bincode::encode_to_vec(&value.0, bincode::config::legacy()).unwrap()
}
fn type_name() -> redb::TypeName {
TypeName::new("bincode")
}
}
#[derive(Debug)]
#[cfg(feature = "db_json")]
pub struct Ser<T>(pub T);
#[cfg(feature = "db_json")]
impl<T: Serialize + for<'a> Deserialize<'a> + std::fmt::Debug> RedbValue for Ser<T> {
type SelfType<'a> = Ser<T>
where
Self: 'a;
type AsBytes<'a> = Vec<u8>
where
Self: 'a;
fn fixed_width() -> Option<usize> {
None
}
fn from_bytes<'a>(data: &'a [u8]) -> Self::SelfType<'a>
where
Self: 'a,
{
Ser(serde_json::from_slice(data).unwrap())
}
fn as_bytes<'a, 'b: 'a>(value: &'a Self::SelfType<'b>) -> Self::AsBytes<'a>
where
Self: 'a,
Self: 'b,
{
serde_json::to_vec(&value.0).unwrap()
}
fn type_name() -> redb::TypeName {
TypeName::new("json")
}
}
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