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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>
*/
use crate::{Filter, MultiBehaviour, Query, Sort, SortOrder, ValueSort};
use anyhow::{Error, anyhow, bail};
use jellyobject::{Path, Value};
use std::{fmt::Display, str::FromStr};
impl Display for Query<'_> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
if !matches!(self.filter, Filter::True) {
write!(f, "FILTER {} ", self.filter)?;
}
if !matches!(self.sort, Sort::None) {
write!(f, "SORT {} ", self.sort)?;
}
Ok(())
}
}
impl Display for Filter<'_> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Filter::True => write!(f, "TRUE"),
Filter::All(filters) => write!(
f,
"({})",
filters
.iter()
.map(|f| f.to_string())
.collect::<Vec<_>>()
.join(" AND ")
),
Filter::Any(filters) => write!(
f,
"({})",
filters
.iter()
.map(|f| f.to_string())
.collect::<Vec<_>>()
.join(" OR ")
),
Filter::Match(path, value) => {
write!(f, "{path} = {value}")
}
Filter::Has(path) => write!(f, "{path}"),
}
}
}
impl Display for Sort {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Sort::None => write!(f, "NONE"),
Sort::Random(0) => write!(f, "RANDOM"),
Sort::Random(seed) => write!(f, "RANDOM WITH SEED {seed}"),
Sort::Value(ValueSort {
multi, order, path, ..
}) => {
write!(
f,
"{} BY {} {path}",
match order {
SortOrder::Ascending => "ASCENDING",
SortOrder::Descending => "DESCENDING",
},
match multi {
MultiBehaviour::Count => "COUNT",
MultiBehaviour::First => "FIRST",
MultiBehaviour::ForEach => "EACH",
MultiBehaviour::Max => "MAX",
MultiBehaviour::Min => "MIN",
},
)
}
Sort::TextSearch(path, value) => {
write!(f, "TEXT SEARCH {path} = {value:?}")
}
}
}
}
impl FromStr for Query<'static> {
type Err = Error;
fn from_str(s: &str) -> Result<Self, Self::Err> {
if let Some((filter, sort)) = s.split_once(" SORT ")
&& let Some(filter) = filter.strip_prefix("FILTER ")
{
Ok(Self {
filter: Filter::from_str(filter)?,
sort: Sort::from_str(sort)?,
..Default::default()
})
} else if let Some(sort) = s.strip_prefix("SORT ") {
Ok(Self {
sort: Sort::from_str(sort)?,
..Default::default()
})
} else if let Some(filter) = s.strip_prefix("FILTER") {
Ok(Self {
filter: Filter::from_str(filter)?,
..Default::default()
})
} else {
bail!("invalid query")
}
}
}
impl FromStr for Filter<'static> {
type Err = Error;
fn from_str(s: &str) -> Result<Self, Self::Err> {
Ok(match s {
"TRUE" => Self::True,
x if let Some(x) = x.strip_prefix("(")
&& let Some(x) = x.strip_suffix(")")
&& let Some((l, r)) = x.split_once("AND") =>
{
Self::All(vec![Filter::from_str(l)?, Filter::from_str(r)?])
}
x if let Some(x) = x.strip_prefix("(")
&& let Some(x) = x.strip_suffix(")")
&& let Some((l, r)) = x.split_once("OR") =>
{
Self::Any(vec![
Filter::from_str(l.trim())?,
Filter::from_str(r.trim())?,
])
}
x if let Some((l, r)) = x.split_once("=") => Self::Match(
Path::from_str(l.trim()).map_err(|e| anyhow!("{e}"))?,
Value::from_str(r.trim()).map_err(|e| anyhow!("{e}"))?,
),
x => Self::Has(Path::from_str(x.trim()).map_err(|e| anyhow!("{e}"))?),
})
}
}
impl FromStr for Sort {
type Err = Error;
fn from_str(s: &str) -> Result<Self, Self::Err> {
Ok(if s == "NONE" {
Sort::None
} else if s == "RANDOM" {
Sort::Random(1)
} else if let Some(s) = s.strip_prefix("TEXT SEARCH ")
&& let Some((path, value)) = s.split_once(" = ")
{
Sort::TextSearch(
Path::from_str(path).map_err(|e| anyhow!("{e}"))?,
value.to_owned(),
)
} else if let Some((order, rest)) = s.split_once(" BY ")
&& let Some((multi, path)) = rest.split_once(" ")
{
Sort::Value(ValueSort {
order: match order {
"ASCENDING" => SortOrder::Ascending,
"DESCENDING" => SortOrder::Descending,
_ => bail!("unknown order"),
},
multi: match multi {
"COUNT" => MultiBehaviour::Count,
"FIRST" => MultiBehaviour::First,
"EACH" => MultiBehaviour::ForEach,
"MAX" => MultiBehaviour::Max,
"MIN" => MultiBehaviour::Min,
_ => bail!("unknown multi bahav"),
},
path: Path::from_str(path).map_err(|e| anyhow!("{e}"))?,
offset: None,
})
} else {
bail!("unknown sort")
})
}
}
#[test]
fn test_parse() {
use jellyobject::Tag;
assert_eq!(
Query::from_str("FILTER (visi = visi AND kind = vide) SORT DESCENDING BY FIRST rldt")
.unwrap(),
Query {
filter: Filter::All(vec![
Filter::Match(Path(vec![Tag::new(b"visi")]), Tag::new(b"visi").into()),
Filter::Match(Path(vec![Tag::new(b"kind")]), Tag::new(b"vide").into()),
]),
sort: Sort::Value(ValueSort {
order: SortOrder::Descending,
path: Path(vec![Tag::new(b"rldt")]),
multi: MultiBehaviour::First,
offset: None,
}),
..Default::default()
}
)
}
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