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use std::{
collections::HashMap,
path::Path,
sync::{Mutex, MutexGuard},
};
use lazy_static::lazy_static;
use mlua::{Lua, UserData};
use crate::lua::{ownedfunction::OwnedFunction, runnable::Runnable};
use super::{register::SheetId, tablized::Tablized};
lazy_static! {
static ref GLOBAL_LOADER: Mutex<Loader> = Mutex::new(Loader::new());
}
#[derive(Default)]
pub struct Loader {
loaders: HashMap<String, Box<dyn Runnable<String, Tablized>>>,
}
impl Loader {
pub fn new() -> Self {
Self {
loaders: HashMap::new(),
}
}
pub fn load_sheet(&self, path: String, lua: &Lua) -> Option<SheetId> {
let p = Path::new(&path);
let loader = self.loaders.get(p.extension()?.to_str()?)?;
match loader.run(path, lua) {
Ok(table) => table.to_sheet(lua).ok(),
Err(_) => None,
}
}
pub fn add(&mut self, extension: String, func: Box<dyn Runnable<String, Tablized>>) {
self.loaders.insert(extension, func);
}
pub fn get() -> MutexGuard<'static, Loader> {
GLOBAL_LOADER.lock().unwrap()
}
}
impl UserData for Loader {
fn add_methods<'lua, M: mlua::prelude::LuaUserDataMethods<'lua, Self>>(methods: &mut M) {
methods.add_function("add", |_, (extension, func): (String, OwnedFunction)| {
GLOBAL_LOADER.lock().unwrap().add(extension, Box::new(func));
Ok(())
});
}
}
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