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|
pub mod application;
pub mod calculator;
use std::sync::Arc;
use itertools::Itertools;
use mlua::{
prelude::*,
LuaSerdeExt,
};
use rayon::iter::FromParallelIterator;
use serde::{
Deserialize,
Serialize,
};
#[derive(Clone, Debug)]
pub enum Entries {
Multiple(Vec<Entry>),
Single(Entry),
None
}
impl FromIterator<Entry> for Entries {
fn from_iter<T: IntoIterator<Item = Entry>>(iter: T) -> Self {
let mut iter = iter.into_iter();
match (iter.next(), iter.next()) {
(None, None) => Self::None,
(Some(first), None) => Self::Single(first),
(None, Some(_)) => unreachable!(),
(Some(first), Some(second)) => {
let mut vec = Vec::from([first, second]);
vec.extend(iter);
Self::Multiple(vec)
},
}
}
}
impl From<Vec<Entry>> for Entries {
fn from(entries: Vec<Entry>) -> Self {
match entries.len() {
0 => Self::None,
1 => {
let entry = entries.into_iter().exactly_one().unwrap();
Self::Single(entry)
},
_ => Self::Multiple(entries)
}
}
}
impl IntoLua for Entries {
fn into_lua(self, lua: &Lua) -> LuaResult<LuaValue> {
match self {
Entries::Multiple(entries) => entries.into_lua(lua),
Entries::Single(entry) => entry.into_lua(lua),
Entries::None => Ok(LuaValue::Nil)
}
}
}
#[derive(Deserialize, Serialize, Clone, Debug)]
pub struct Entry {
pub message: String,
pub exec: Option<(String, bool)>,
}
impl IntoLua for Entry {
fn into_lua(self, lua: &Lua) -> LuaResult<LuaValue> {
return lua.to_value(&self);
}
}
impl FromLua for Entry {
fn from_lua(value: LuaValue, lua: &Lua) -> LuaResult<Self> {
return lua.from_value(value);
}
}
#[derive(Default, Clone, Debug)]
pub enum Cache {
Valid(Entries),
#[default]
Stale,
}
pub struct _Lense<T: Lense>(pub Arc<T>);
pub trait Lense {
const NAME: &'static str;
fn init() -> Arc<Self>;
fn set_cache(&self, cache: Cache);
fn get_cache(&self) -> Cache;
fn set_interrupt(&self, interrupt: bool);
fn get_interrupt(&self) -> bool;
fn entries(&self, lua: &Lua, input: String) -> Result<Entries, anyhow::Error>;
fn filter(&self, entries: Entries, input: String) -> Entries {
let entry_contains = |entry: &Entry| {
entry.message.to_lowercase().contains(&input.to_lowercase())
};
match entries {
Entries::Multiple(entries) => entries.into_iter()
.filter(entry_contains)
.collect(),
Entries::Single(entry) => if entry_contains(&entry) { Entries::Single(entry) } else { Entries::None }
Entries::None => Entries::None
}
}
}
impl<T: Lense + 'static> LuaUserData for _Lense<T> {
fn add_fields<F: LuaUserDataFields<Self>>(fields: &mut F) {
fields.add_field_method_get("stale", |_, this| {
Ok(matches!(this.0.get_cache(), Cache::Stale))
});
fields.add_field("name", T::NAME);
}
fn add_methods<M: LuaUserDataMethods<Self>>(methods: &mut M) {
methods.add_method_mut("query", |lua, this, input: String| {
this.0.set_interrupt(false); // reset interrupt so that we can use the lense again
return Ok(match this.0.get_cache() {
Cache::Valid(entries) => this.0.filter(entries.clone(), input),
Cache::Stale => {
let entries = this.0.entries(lua, input.clone()).map_err(LuaError::external)?;
let mut entries = this.0.filter(entries, input);
match entries {
Entries::Multiple(ref mut entries) => entries.sort_by(|a, b| a.message.cmp(&b.message)),
_ => {}
}
this.0.set_cache(Cache::Valid(entries.clone()));
entries
}
});
});
methods.add_method_mut("mark_stale", |_, this, _: ()| {
Ok(this.0.set_cache(Cache::Stale))
});
methods.add_method_mut("interrupt", |_, this, _: ()| Ok(this.0.set_interrupt(true)));
}
}
|
