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use anyhow::Result;
use log::warn;
use lsp_server::{ErrorCode, Notification, Request, RequestId, Response};
use serde::de::DeserializeOwned;
pub struct NotificationDispatcher {
not: Option<Notification>,
}
impl NotificationDispatcher {
pub fn new(not: Notification) -> Self {
Self { not: Some(not) }
}
pub fn on<N, F>(mut self, handler: F) -> Result<Self>
where
N: lsp_types::notification::Notification,
N::Params: DeserializeOwned,
F: FnOnce(N::Params) -> Result<()>,
{
if let Some(not) = self.not {
match not.extract::<N::Params>(N::METHOD) {
Ok(params) => {
handler(params)?;
self.not = None;
}
Err(lsp_server::ExtractError::MethodMismatch(not)) => {
self.not = Some(not);
}
Err(lsp_server::ExtractError::JsonError { .. }) => {
self.not = None;
}
};
}
Ok(self)
}
pub fn default(self) {
if let Some(not) = &self.not {
warn!("Unknown notification: {}", not.method);
}
}
}
pub struct RequestDispatcher {
req: Option<Request>,
}
impl RequestDispatcher {
pub fn new(req: Request) -> Self {
Self { req: Some(req) }
}
pub fn on<R, F>(mut self, handler: F) -> Result<Self>
where
R: lsp_types::request::Request,
R::Params: DeserializeOwned,
F: FnOnce(RequestId, R::Params) -> Result<()>,
{
if let Some(req) = self.req {
match req.extract::<R::Params>(R::METHOD) {
Ok((id, params)) => {
handler(id, params)?;
self.req = None;
}
Err(lsp_server::ExtractError::MethodMismatch(req)) => {
self.req = Some(req);
}
Err(lsp_server::ExtractError::JsonError { .. }) => {
self.req = None;
}
}
}
Ok(self)
}
pub fn default(self) -> Option<Response> {
self.req.map(|req| {
warn!("Unknown request: {}", req.method);
Response::new_err(
req.id,
ErrorCode::MethodNotFound as i32,
"method not found".to_string(),
)
})
}
}
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