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use flate2::read::ZlibDecoder;
use serde_json;
use websocket::message::OwnedMessage;
use websocket::sync::stream::{TcpStream, TlsStream};
use websocket::sync::Client as WsClient;
use gateway::GatewayError;
use internal::prelude::*;
pub trait ReceiverExt {
fn recv_json<F, T>(&mut self, decode: F) -> Result<T> where F: Fn(Value) -> Result<T>;
}
pub trait SenderExt {
fn send_json(&mut self, value: &Value) -> Result<()>;
}
impl ReceiverExt for WsClient<TlsStream<TcpStream>> {
fn recv_json<F, T>(&mut self, decode: F) -> Result<T>
where F: Fn(Value) -> Result<T> {
let message = self.recv_message()?;
let res = match message {
OwnedMessage::Binary(bytes) => {
let value = serde_json::from_reader(ZlibDecoder::new(&bytes[..]))?;
Some(decode(value).map_err(|why| {
let s = String::from_utf8_lossy(&bytes);
warn!("(╯°□°）╯︵ ┻━┻ Error decoding: {}", s);
why
}))
},
OwnedMessage::Close(data) => Some(Err(Error::Gateway(GatewayError::Closed(data)))),
OwnedMessage::Text(payload) => {
let value = serde_json::from_str(&payload)?;
Some(decode(value).map_err(|why| {
warn!("(╯°□°）╯︵ ┻━┻ Error decoding: {}", payload);
why
}))
},
OwnedMessage::Ping(x) => {
self.send_message(&OwnedMessage::Pong(x))
.map_err(Error::from)?;
None
},
OwnedMessage::Pong(_) => None,
};
// As to ignore the `None`s returned from `Ping` and `Pong`.
// Since they're essentially useless to us anyway.
match res {
Some(data) => data,
None => self.recv_json(decode),
}
}
}
impl SenderExt for WsClient<TlsStream<TcpStream>> {
fn send_json(&mut self, value: &Value) -> Result<()> {
serde_json::to_string(value)
.map(OwnedMessage::Text)
.map_err(Error::from)
.and_then(|m| self.send_message(&m).map_err(Error::from))
}
}
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