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use flate2::read::ZlibDecoder;
use serde_json;
use websocket::client::{Receiver, Sender};
use websocket::message::{Message as WsMessage, Type as WsType};
use websocket::stream::WebSocketStream;
use websocket::ws::receiver::Receiver as WsReceiver;
use websocket::ws::sender::Sender as WsSender;
use ::client::gateway::GatewayError;
use ::internal::prelude::*;
pub trait ReceiverExt {
fn recv_json<F, T>(&mut self, decode: F) -> Result<T>
where F: FnOnce(Value) -> Result<T>;
}
pub trait SenderExt {
fn send_json(&mut self, value: &Value) -> Result<()>;
}
impl ReceiverExt for Receiver<WebSocketStream> {
fn recv_json<F, T>(&mut self, decode: F) -> Result<T> where F: FnOnce(Value) -> Result<T> {
let message: WsMessage = self.recv_message()?;
if message.opcode == WsType::Close {
let r = String::from_utf8_lossy(&message.payload).into_owned();
Err(Error::Gateway(GatewayError::Closed(message.cd_status_code, r)))
} else if message.opcode == WsType::Binary || message.opcode == WsType::Text {
let json: Value = if message.opcode == WsType::Binary {
serde_json::from_reader(ZlibDecoder::new(&message.payload[..]))?
} else {
serde_json::from_reader(&message.payload[..])?
};
match decode(json) {
Ok(v) => Ok(v),
Err(why) => {
let s = String::from_utf8_lossy(&message.payload);
warn!("(╯°□°）╯︵ ┻━┻ Error decoding: {}", s);
Err(why)
}
}
} else {
let r = String::from_utf8_lossy(&message.payload).into_owned();
Err(Error::Gateway(GatewayError::Closed(None, r)))
}
}
}
impl SenderExt for Sender<WebSocketStream> {
fn send_json(&mut self, value: &Value) -> Result<()> {
serde_json::to_string(value)
.map(WsMessage::text)
.map_err(Error::from)
.and_then(|m| self.send_message(&m).map_err(Error::from))
}
}
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