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use crate::debug_ln;
use std::rc::Rc;
use std::cell::RefCell;
use std::future::Future;
use std::pin::Pin;
use wasm_bindgen::prelude::*;
use js_sys::{Array, ArrayBuffer, Object, Reflect};
use web_sys::{Blob, BlobPropertyBag, Url};
use super::atw::Thread as AtwThread;
use super::job;
use super::encode_task_msg;
type ResultJJ = Result<JsValue, JsValue>;
pub struct Thread {
ab_init: RefCell<Option<ArrayBuffer>>,
ab_wasm: RefCell<Option<ArrayBuffer>>,
atw_th: AtwThread,
is_initialized: RefCell<bool>,
id: RefCell<Option<Rc<String>>>,
is_busy: RefCell<bool>,
}
impl Thread {
fn create_blob_url(content: &str) -> String {
let blob = Blob::new_with_str_sequence_and_options(
&Array::of1(&JsValue::from(content)),
BlobPropertyBag::new().type_("text/javascript"))
.unwrap();
Url::create_object_url_with_blob(&blob).unwrap()
}
fn revoke_blob_url(blob_url: String) {
Url::revoke_object_url(&blob_url).unwrap();
}
fn get_worker_content() -> &'static str {
"
const instantiate = async (abInit, abWasm) => {
// console.log('abInit:', abInit);
const initJs = new TextDecoder().decode(abInit);
const init = (new Function(initJs)).call(null);
const wbg = init();
const wasm = await wbg(abWasm);
// console.log('wbg:', wbg);
// console.log('wasm:', wasm);
return { wbg, wasm };
};
let first = true;
self.onmessage = async e => {
// console.log('onmessage(): e.data', e.data);
const { id, payload } = e.data; // destructure the initial `atw` msg
const { abInit, abWasm } = payload;
if (first) {
first = false;
try {
const { wbg, wasm } = await instantiate(abInit, abWasm);
// throw 'ok, bye for now'; // !! debug
// This overrides `self.onmessage`
const _worker = wbg.wmt_bootstrap(self, id);
self.wmtContext = { wbg, wasm, _worker };
// console.log('bootstrap complete - self.wmtContext:', self.wmtContext);
} catch (e) {
console.log('bootstrap error:', e);
}
return;
}
throw 'oh no';
};
"
}
pub fn new(ab_init: ArrayBuffer, ab_wasm: ArrayBuffer) -> Self {
let blob_url = Self::create_blob_url(Self::get_worker_content());
debug_ln!("blob_url: {}", &blob_url);
let atw_th = AtwThread::new(&blob_url);
Self::revoke_blob_url(blob_url);
Self {
ab_init: RefCell::new(Some(ab_init)),
ab_wasm: RefCell::new(Some(ab_wasm)),
atw_th,
is_initialized: RefCell::new(false),
id: RefCell::new(None),
is_busy: RefCell::new(false),
}
}
pub async fn init(&self) -> Result<&Self, JsValue> {
let ab_init = self.ab_init.replace(None).unwrap_throw();
let ab_wasm = self.ab_wasm.replace(None).unwrap_throw();
let payload = Object::new();
Reflect::set(payload.as_ref(), &JsValue::from("abInit"), &ab_init).unwrap();
Reflect::set(payload.as_ref(), &JsValue::from("abWasm"), &ab_wasm).unwrap();
let result = self.atw_th.send_request(
&payload, Some(&Array::of2(&ab_init, &ab_wasm))).await;
let result = match result {
Ok(jsv) => format!("ok: {}", jsv.as_string().unwrap()),
Err(jsv) => format!("err: {}", jsv.as_string().unwrap()),
};
debug_ln!("init() - result: {}", result);
self.is_initialized.replace(true);
Ok(self)
}
pub async fn and_init(self) -> Result<Self, JsValue> {
self.init().await?;
Ok(self)
}
pub async fn exec<F>(&self, clos: F) -> ResultJJ where F: job::MtClosure {
assert!(*self.is_initialized.borrow());
type _TypeT = Pin<Box<dyn Future<Output = ResultJJ>>>;
let ab = job::Job::<_TypeT>::from_clos(clos);
let msg = encode_task_msg("job-clos", Some(&ab));
self.atw_th.send_request(&msg, Some(&Array::of1(&ab))).await
}
pub async fn exec_async<F, T>(&self, aclos: F) -> ResultJJ where F: job::MtAsyncClosure<T> {
assert!(*self.is_initialized.borrow());
let ab = job::Job::<T>::from_aclos(aclos);
let msg = encode_task_msg("job-aclos", Some(&ab));
self.atw_th.send_request(&msg, Some(&Array::of1(&ab))).await
}
pub async fn exec_js(&self, js: &str) -> ResultJJ {
let msg = encode_task_msg("job-js", Some(&JsValue::from(js)));
self.atw_th.send_request(&msg, None).await
}
pub async fn exec_js_async(&self, js: &str) -> ResultJJ {
let msg = encode_task_msg("job-js-async", Some(&JsValue::from(js)));
self.atw_th.send_request(&msg, None).await
}
pub fn terminate(&self) {
self.atw_th.terminate();
}
pub fn is_terminated(&self) -> bool {
self.atw_th.is_terminated()
}
pub fn get_id(&self) -> Option<Rc<String>> {
self.id.borrow().as_ref().cloned()
}
pub fn set_id(&self, id: &str) -> &Self {
self.id.replace(Some(Rc::new(String::from(id))));
self
}
pub fn get_busy(&self) -> bool {
*self.is_busy.borrow()
}
pub fn set_busy(&self, tf: bool) -> &Self {
self.is_busy.replace(tf);
self
}
}