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use super::{Node, NodeContext, NodeKind, NodeRequest, NodeResponse};
use crate::{config::DynNode, error::ServiceError};
use futures::Future;
use regex::RegexSet;
use serde_yaml::Value;
use std::{collections::BTreeMap, pin::Pin, sync::Arc};
pub struct PathsKind;
struct Paths {
matcher: RegexSet,
handlers: Vec<DynNode>,
}
impl NodeKind for PathsKind {
fn name(&self) -> &'static str {
"paths"
}
fn instanciate(&self, config: Value) -> anyhow::Result<Arc<dyn Node>> {
let routes = serde_yaml::from_value::<BTreeMap<String, DynNode>>(config)?
.into_iter()
.collect::<Vec<(String, DynNode)>>();
let mut handlers = Vec::new();
let mut patterns = Vec::new();
for (k, v) in routes {
handlers.push(v);
patterns.push(format!("^{}$", k));
}
let matcher = RegexSet::new(&patterns)?;
Ok(Arc::new(Paths { handlers, matcher }))
}
}
impl Node for Paths {
fn handle<'a>(
&'a self,
context: &'a mut NodeContext,
request: NodeRequest,
) -> Pin<Box<dyn Future<Output = Result<NodeResponse, ServiceError>> + Send + Sync + 'a>> {
Box::pin(async move {
let path = request.uri().path();
let index = self
.matcher
.matches(path)
.iter()
.next()
.ok_or(ServiceError::UnknownPath)?;
self.handlers[index].handle(context, request).await
})
}
}
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