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use crate::plugins::plugin_map::PluginEnv;
use crate::plugins::zellij_exports::wasi_write_object;
use wasmtime::{Instance, Store};
use zellij_utils::async_channel::{unbounded, Receiver, Sender};
use zellij_utils::async_std::task;
use zellij_utils::errors::prelude::*;
use zellij_utils::input::plugins::PluginConfig;
use zellij_utils::plugin_api::message::ProtobufMessage;
use zellij_utils::prost::Message;
pub struct RunningWorker {
pub instance: Instance,
pub name: String,
pub plugin_config: PluginConfig,
pub store: Store<PluginEnv>,
}
impl RunningWorker {
pub fn new(
store: Store<PluginEnv>,
instance: Instance,
name: &str,
plugin_config: PluginConfig,
) -> Self {
RunningWorker {
store,
instance,
name: name.into(),
plugin_config,
}
}
pub fn send_message(&mut self, message: String, payload: String) -> Result<()> {
let err_context = || format!("Failed to send message to worker");
let protobuf_message = ProtobufMessage {
name: message,
payload,
..Default::default()
};
let protobuf_bytes = protobuf_message.encode_to_vec();
let work_function = self
.instance
.get_typed_func::<(), ()>(&mut self.store, &self.name)
.with_context(err_context)?;
wasi_write_object(self.store.data(), &protobuf_bytes).with_context(err_context)?;
work_function
.call(&mut self.store, ())
.with_context(err_context)?;
Ok(())
}
}
pub enum MessageToWorker {
Message(String, String), // message, payload
Exit,
}
pub fn plugin_worker(mut worker: RunningWorker) -> Sender<MessageToWorker> {
let (sender, receiver): (Sender<MessageToWorker>, Receiver<MessageToWorker>) = unbounded();
task::spawn({
async move {
loop {
match receiver.recv().await {
Ok(MessageToWorker::Message(message, payload)) => {
if let Err(e) = worker.send_message(message, payload) {
log::error!("Failed to send message to worker: {:?}", e);
}
},
Ok(MessageToWorker::Exit) => {
break;
},
Err(e) => {
log::error!("Failed to receive worker message on channel: {:?}", e);
break;
},
}
}
}
});
sender
}
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