edge_frame/
middleware.rs

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
use core::cell::RefCell;
use core::fmt::Debug;

extern crate alloc;
use alloc::rc::Rc;

use log::{log, trace, Level};

use embassy_sync::channel;
use serde::{de::DeserializeOwned, Serialize};

use futures::stream::{SplitSink, SplitStream};
use futures::{SinkExt, StreamExt};

use gloo_net::websocket::{futures::WebSocket, Message};

use postcard::to_allocvec;

use wasm_bindgen::JsError;
use wasm_bindgen_futures::spawn_local;

use yewdux_middleware::*;

pub fn log_msg<M, D>(level: Level) -> impl Fn(&MiddlewareContext, M, D)
where
    M: Debug,
    D: MiddlewareDispatch<M>,
{
    move |mcx, msg, dispatch| {
        log!(level, "Dispatching message: {:?}", msg);

        dispatch.invoke(mcx, msg);
    }
}

pub fn log_store<S, M, D>(level: Level) -> impl Fn(&MiddlewareContext, M, D)
where
    S: Store + Debug,
    M: Reducer<S> + Debug,
    D: MiddlewareDispatch<M>,
{
    move |mcx, msg, dispatch| {
        log!(level, "Store (before): {:?}", mcx.context().get::<S>());

        dispatch.invoke(mcx, msg);

        log!(level, "Store (after): {:?}", mcx.context().get::<S>());
    }
}

#[allow(clippy::await_holding_refcell_ref)]
pub fn send_local<M>(
    sender: impl Into<channel::DynamicSender<'static, M>>,
) -> impl Fn(&MiddlewareContext, M)
where
    M: Debug + 'static,
{
    let sender = Rc::new(RefCell::new(sender.into()));

    move |_mcx, msg| {
        let sender = sender.clone();

        spawn_local(async move {
            trace!("Sending request: {:?}", msg);

            let guard = sender.borrow_mut();

            guard.send(msg).await;
        });
    }
}

pub fn receive_local<M>(
    mcx: &MiddlewareContext,
    receiver: impl Into<channel::DynamicReceiver<'static, M>>,
) where
    M: Debug + 'static,
{
    let mcx = mcx.clone();
    let receiver = receiver.into();

    spawn_local(async move {
        loop {
            let event = receiver.receive().await;
            trace!("Received event: {:?}", event);

            mcx.invoke(event);
        }
    });
}

pub fn open(
    ws_endpoint: &str,
) -> Result<(SplitSink<WebSocket, Message>, SplitStream<WebSocket>), JsError> {
    open_url(&format!(
        "ws://{}{}",
        web_sys::window().unwrap().location().host().unwrap(),
        ws_endpoint,
    ))
}

fn open_url(url: &str) -> Result<(SplitSink<WebSocket, Message>, SplitStream<WebSocket>), JsError> {
    let ws = WebSocket::open(url)?;

    Ok(ws.split())
}

#[allow(clippy::await_holding_refcell_ref)]
pub fn send<M>(sender: SplitSink<WebSocket, Message>) -> impl Fn(&MiddlewareContext, M)
where
    M: Serialize + Debug + 'static,
{
    let sender = Rc::new(RefCell::new(sender));

    move |_ctx, msg| {
        let sender = sender.clone();

        spawn_local(async move {
            trace!("Sending request: {:?}", msg);

            let mut guard = sender.borrow_mut();

            guard
                .send(Message::Bytes(to_allocvec(&msg).unwrap()))
                .await
                .unwrap();
        });
    }
}

pub fn receive<M>(mcx: &MiddlewareContext, mut receiver: SplitStream<WebSocket>)
where
    M: DeserializeOwned + Debug + 'static,
{
    let mcx = mcx.clone();

    spawn_local(async move {
        loop {
            let event = receiver.next().await.unwrap().unwrap();
            trace!("Received event: {:?}", event);

            if let Message::Bytes(bytes) = event {
                let event = postcard::from_bytes(&bytes).unwrap();

                mcx.invoke::<M>(event);
            } else {
                panic!("Unexpected message type: Text");
            }
        }
    });
}