some refactoring

crates/dav/src/resource/resource_service.rs

@@ -0,0 +1,63 @@
+use std::str::FromStr;
+
+use actix_web::{dev::ResourceMap, http::Method, web, HttpRequest, ResponseError};
+use async_trait::async_trait;
+use serde::Deserialize;
+
+use crate::methods::{route_delete, route_propfind, route_proppatch};
+
+use super::Resource;
+
+#[async_trait(?Send)]
+pub trait ResourceService: Sized + 'static {
+    type MemberType: Resource<Error = Self::Error>;
+    type PathComponents: for<'de> Deserialize<'de> + Sized + Clone + 'static; // defines how the resource URI maps to parameters, i.e. /{principal}/{calendar} -> (String, String)
+    type Resource: Resource<Error = Self::Error>;
+    type Error: ResponseError + From<crate::Error>;
+
+    async fn new(
+        req: &HttpRequest,
+        path_components: Self::PathComponents,
+    ) -> Result<Self, Self::Error>;
+
+    async fn get_members(
+        &self,
+        _rmap: &ResourceMap,
+    ) -> Result<Vec<(String, Self::MemberType)>, Self::Error> {
+        Ok(vec![])
+    }
+
+    async fn get_resource(&self) -> Result<Self::Resource, Self::Error>;
+    async fn save_resource(&self, _file: Self::Resource) -> Result<(), Self::Error> {
+        Err(crate::Error::Unauthorized.into())
+    }
+    async fn delete_resource(&self, _use_trashbin: bool) -> Result<(), Self::Error> {
+        Err(crate::Error::Unauthorized.into())
+    }
+
+    #[inline]
+    fn resource_name() -> &'static str {
+        Self::Resource::resource_name()
+    }
+
+    #[inline]
+    fn actix_resource() -> actix_web::Resource {
+        Self::actix_additional_routes(
+            web::resource("")
+                .name(Self::resource_name())
+                .route(
+                    web::method(Method::from_str("PROPFIND").unwrap()).to(route_propfind::<Self>),
+                )
+                .route(
+                    web::method(Method::from_str("PROPPATCH").unwrap()).to(route_proppatch::<Self>),
+                )
+                .delete(route_delete::<Self>),
+        )
+    }
+
+    /// Hook for other resources to insert their additional methods (i.e. REPORT, MKCALENDAR)
+    #[inline]
+    fn actix_additional_routes(res: actix_web::Resource) -> actix_web::Resource {
+        res
+    }
+}