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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) 2026 metamuffin <metamuffin.org>
*/
pub mod kv;
pub mod query_ser;
#[cfg(test)]
pub mod test_shared;
use anyhow::Result;
use jellyobject::{ObjectBuffer, Path, Tag};
pub type RowNum = u64;
pub type RowIter = Box<dyn Iterator<Item = Result<(RowNum, Vec<u8>)>>>;
pub trait Database: Send + Sync {
fn transaction(&self, f: &mut dyn FnMut(&mut dyn Transaction) -> Result<()>) -> Result<()>;
}
pub trait Transaction {
fn insert(&mut self, entry: ObjectBuffer) -> Result<RowNum>;
fn remove(&mut self, row: RowNum) -> Result<()>;
fn update(&mut self, row: RowNum, entry: ObjectBuffer) -> Result<()>;
fn get(&self, row: RowNum) -> Result<Option<ObjectBuffer>>;
fn query<'a>(
&'a mut self,
query: Query,
) -> Result<Box<dyn Iterator<Item = Result<(RowNum, Vec<u8>)>> + 'a>>;
fn query_single(&mut self, query: Query) -> Result<Option<RowNum>>;
fn count(&mut self, query: Query) -> Result<u64>;
fn debug_info(&self) -> Result<String>;
}
#[derive(Default, Clone)]
pub struct Query {
pub filter: Filter,
pub sort: Sort,
}
#[derive(Default, Clone)]
pub enum Sort {
#[default]
None,
Value(ValueSort),
TextSearch(Path, String),
}
#[derive(Clone)]
pub struct ValueSort {
pub order: SortOrder,
pub path: Path,
pub multi: MultiBehaviour,
pub offset: Option<Vec<u8>>,
}
#[derive(Debug, Clone, Copy, Hash, PartialEq, Eq)]
pub enum MultiBehaviour {
First,
ForEach,
Max,
Min,
Count,
}
#[derive(Debug, Clone, Copy, Hash, PartialEq, Eq)]
pub enum SortOrder {
Ascending,
Descending,
}
#[derive(Debug, Clone, Default)]
pub enum Filter {
#[default]
True,
All(Vec<Filter>),
Any(Vec<Filter>),
Match(Path, Value),
Has(Path),
}
#[derive(Debug, Clone)]
pub enum Value {
Tag(Tag),
U32(u32),
U64(u64),
I64(i64),
String(String),
Binary(Vec<u8>),
}
impl From<&str> for Value {
fn from(value: &str) -> Self {
Self::String(value.to_owned())
}
}
impl From<String> for Value {
fn from(value: String) -> Self {
Self::String(value)
}
}
impl From<u32> for Value {
fn from(value: u32) -> Self {
Self::U32(value)
}
}
impl From<u64> for Value {
fn from(value: u64) -> Self {
Self::U64(value)
}
}
impl From<i64> for Value {
fn from(value: i64) -> Self {
Self::I64(value)
}
}
impl From<Tag> for Value {
fn from(value: Tag) -> Self {
Self::Tag(value)
}
}
|
