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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
use super::dispatch_json::{JsonOp, Value};
use crate::op_error::OpError;
use crate::ops::json_op;
use crate::state::State;
use crate::worker::WorkerEvent;
use deno_core::*;
use futures;
use futures::channel::mpsc;
use futures::sink::SinkExt;
use std;
use std::convert::From;
pub fn web_worker_op<D>(
sender: mpsc::Sender<WorkerEvent>,
dispatcher: D,
) -> impl Fn(Value, Option<ZeroCopyBuf>) -> Result<JsonOp, OpError>
where
D: Fn(
&mpsc::Sender<WorkerEvent>,
Value,
Option<ZeroCopyBuf>,
) -> Result<JsonOp, OpError>,
{
move |args: Value,
zero_copy: Option<ZeroCopyBuf>|
-> Result<JsonOp, OpError> { dispatcher(&sender, args, zero_copy) }
}
pub fn init(i: &mut Isolate, s: &State, sender: &mpsc::Sender<WorkerEvent>) {
i.register_op(
"worker_post_message",
s.core_op(json_op(web_worker_op(
sender.clone(),
op_worker_post_message,
))),
);
i.register_op(
"worker_close",
s.core_op(json_op(web_worker_op(sender.clone(), op_worker_close))),
);
}
/// Post message to host as guest worker
fn op_worker_post_message(
sender: &mpsc::Sender<WorkerEvent>,
_args: Value,
data: Option<ZeroCopyBuf>,
) -> Result<JsonOp, OpError> {
let d = Vec::from(data.unwrap().as_ref()).into_boxed_slice();
let mut sender = sender.clone();
let fut = sender.send(WorkerEvent::Message(d));
futures::executor::block_on(fut).expect("Failed to post message to host");
Ok(JsonOp::Sync(json!({})))
}
/// Notify host that guest worker closes
fn op_worker_close(
sender: &mpsc::Sender<WorkerEvent>,
_args: Value,
_data: Option<ZeroCopyBuf>,
) -> Result<JsonOp, OpError> {
let mut sender = sender.clone();
sender.close_channel();
Ok(JsonOp::Sync(json!({})))
}
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