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use crate::frecency::FrecencyTracker;
use crate::fuzzy::FuzzyOptions;
use crate::lsp_item::LspItem;
use lazy_static::lazy_static;
use mlua::prelude::*;
use regex::Regex;
use std::collections::{HashMap, HashSet};
use std::sync::RwLock;
mod frecency;
mod fuzzy;
mod keyword;
mod lsp_item;
lazy_static! {
static ref REGEX: Regex = Regex::new(r"\p{L}[\p{L}0-9_\\-]{2,}").unwrap();
static ref FRECENCY: RwLock<Option<FrecencyTracker>> = RwLock::new(None);
static ref HAYSTACKS_BY_PROVIDER: RwLock<HashMap<String, Vec<LspItem>>> =
RwLock::new(HashMap::new());
}
pub fn init_db(_: &Lua, (db_path, use_unsafe_no_lock): (String, bool)) -> LuaResult<bool> {
let mut frecency = FRECENCY.write().map_err(|_| {
mlua::Error::RuntimeError("Failed to acquire lock for frecency".to_string())
})?;
if frecency.is_some() {
return Ok(false);
}
*frecency = Some(FrecencyTracker::new(&db_path, use_unsafe_no_lock)?);
Ok(true)
}
pub fn destroy_db(_: &Lua, _: ()) -> LuaResult<bool> {
let frecency = FRECENCY.write().map_err(|_| {
mlua::Error::RuntimeError("Failed to acquire lock for frecency".to_string())
})?;
drop(frecency);
let mut frecency = FRECENCY.write().map_err(|_| {
mlua::Error::RuntimeError("Failed to acquire lock for frecency".to_string())
})?;
*frecency = None;
Ok(true)
}
pub fn access(_: &Lua, item: LspItem) -> LuaResult<bool> {
let mut frecency_handle = FRECENCY.write().map_err(|_| {
mlua::Error::RuntimeError("Failed to acquire lock for frecency".to_string())
})?;
let frecency = frecency_handle.as_mut().ok_or_else(|| {
mlua::Error::RuntimeError("Attempted to use frencecy before initialization".to_string())
})?;
frecency.access(&item)?;
Ok(true)
}
pub fn set_provider_items(
_: &Lua,
(provider_id, items): (String, Vec<LspItem>),
) -> LuaResult<bool> {
let mut items_by_provider = HAYSTACKS_BY_PROVIDER.write().map_err(|_| {
mlua::Error::RuntimeError("Failed to acquire lock for items by provider".to_string())
})?;
items_by_provider.insert(provider_id, items);
Ok(true)
}
pub fn fuzzy(
_lua: &Lua,
(line, cursor_col, provider_id, opts): (String, usize, String, FuzzyOptions),
) -> LuaResult<(Vec<i32>, Vec<u32>)> {
let mut frecency_handle = FRECENCY.write().map_err(|_| {
mlua::Error::RuntimeError("Failed to acquire lock for frecency".to_string())
})?;
let frecency = frecency_handle.as_mut().ok_or_else(|| {
mlua::Error::RuntimeError("Attempted to use frencecy before initialization".to_string())
})?;
let haystacks_by_provider = HAYSTACKS_BY_PROVIDER.read().map_err(|_| {
mlua::Error::RuntimeError("Failed to acquire lock for items by provider".to_string())
})?;
let haystack = haystacks_by_provider.get(&provider_id).ok_or_else(|| {
mlua::Error::RuntimeError(format!(
"Attempted to fuzzy match for provider {} before setting the provider's items",
provider_id
))
})?;
Ok(fuzzy::fuzzy(&line, cursor_col, haystack, frecency, opts))
}
pub fn fuzzy_matched_indices(
_lua: &Lua,
(line, cursor_col, haystack, match_suffix): (String, usize, Vec<String>, bool),
) -> LuaResult<Vec<Vec<usize>>> {
Ok(fuzzy::fuzzy_matched_indices(
&line,
cursor_col,
&haystack,
match_suffix,
))
}
pub fn get_keyword_range(
_lua: &Lua,
(line, col, match_suffix): (String, usize, bool),
) -> LuaResult<(usize, usize)> {
Ok(keyword::get_keyword_range(&line, col, match_suffix))
}
pub fn guess_edit_range(
_lua: &Lua,
(item, line, cursor_col, match_suffix): (LspItem, String, usize, bool),
) -> LuaResult<(usize, usize)> {
// TODO: take the max range from insert_text and filter_text
Ok(keyword::guess_keyword_range_from_item(
item.insert_text.as_ref().unwrap_or(&item.label),
&line,
cursor_col,
match_suffix,
))
}
pub fn get_words(_: &Lua, text: String) -> LuaResult<Vec<String>> {
Ok(REGEX
.find_iter(&text)
.map(|m| m.as_str().to_string())
.filter(|s| s.len() < 512)
.collect::<HashSet<String>>()
.into_iter()
.collect())
}
// NOTE: skip_memory_check greatly improves performance
// https://github.com/mlua-rs/mlua/issues/318
#[mlua::lua_module(skip_memory_check)]
fn blink_cmp_fuzzy(lua: &Lua) -> LuaResult<LuaTable> {
let exports = lua.create_table()?;
exports.set("init_db", lua.create_function(init_db)?)?;
exports.set("destroy_db", lua.create_function(destroy_db)?)?;
exports.set("access", lua.create_function(access)?)?;
exports.set(
"set_provider_items",
lua.create_function(set_provider_items)?,
)?;
exports.set("fuzzy", lua.create_function(fuzzy)?)?;
exports.set(
"fuzzy_matched_indices",
lua.create_function(fuzzy_matched_indices)?,
)?;
exports.set("get_keyword_range", lua.create_function(get_keyword_range)?)?;
exports.set("guess_edit_range", lua.create_function(guess_edit_range)?)?;
exports.set("get_words", lua.create_function(get_words)?)?;
Ok(exports)
}
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