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use crate::*;
use std::{
fmt::Debug,
io::{Error, ErrorKind, Result},
};
use url2::prelude::*;
pub type InStreamConfigAny = Box<dyn std::any::Any + 'static + Send>;
pub trait InStreamConfig: 'static + Sized + Debug + Send {
fn from_any(any: InStreamConfigAny) -> Result<Self> {
match any.downcast::<Self>() {
Ok(v) => Ok(*v),
Err(_) => Err(Error::new(ErrorKind::InvalidInput, "bad config type")),
}
}
fn from_gen<C: InStreamConfig>(c: C) -> Result<Self> {
Self::from_any(c.to_any())
}
fn to_any(self) -> InStreamConfigAny {
Box::new(self)
}
}
impl InStreamConfig for () {}
impl InStreamConfig for InStreamConfigAny {
fn to_any(self) -> InStreamConfigAny {
self
}
}
pub trait InStreamListener<R: Sized + Debug + Send + Sync, W: Sized + Debug + Send + Sync>:
Sized + Debug + Send + Sync
{
type Stream: InStream<R, W>;
fn raw_bind<C: InStreamConfig>(url: &Url2, config: C) -> Result<Self>;
fn binding(&self) -> Url2;
fn accept(&mut self) -> Result<<Self as InStreamListener<R, W>>::Stream>;
}
pub trait InStreamListenerStd
where
for<'a> Self: InStreamListener<&'a mut [u8], &'a [u8]>,
{
type StreamStd: InStreamStd;
fn accept_std(&mut self) -> Result<<Self as InStreamListenerStd>::StreamStd>;
}
pub trait InStream<R: Sized + Debug + Send + Sync, W: Sized + Debug + Send + Sync>:
Sized + Debug + Send + Sync
{
const URL_SCHEME: &'static str;
fn raw_connect<C: InStreamConfig>(url: &Url2, config: C) -> Result<Self>;
fn remote_url(&self) -> Url2;
fn read(&mut self, data: R) -> Result<usize>;
fn write(&mut self, data: W) -> Result<usize>;
fn flush(&mut self) -> Result<()>;
}
pub trait InStreamStd
where
for<'a> Self: InStream<&'a mut [u8], &'a [u8]>,
{
fn into_std_stream(self) -> StdStreamAdapter<Self> {
StdStreamAdapter::new(self)
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn can_use_struct_or_any_for_config() {
#[derive(Debug, Clone)]
struct S {
data: String,
}
impl InStreamConfig for S {}
fn test_either<C: InStreamConfig>(c: C) {
let c = S::from_gen(c).unwrap();
assert_eq!("test_string", &c.data);
}
let s = S {
data: "test_string".to_string(),
};
test_either(s.clone());
test_either(s.clone().to_any());
}
}