Migrate DAV props to serde. Big clusterfuck right now but it'll hopefully pay off

crates/dav/src/resource.rs

@@ -1,13 +1,16 @@
-use std::{io::Write, str::FromStr};
-
 use actix_web::{http::StatusCode, HttpRequest};
 use anyhow::{anyhow, Result};
 use async_trait::async_trait;
 use quick_xml::Writer;
 use rustical_auth::AuthInfo;
-use strum::VariantNames;
+use serde::Serialize;
+use std::str::FromStr;
+use strum::{EnumProperty, VariantNames};
 
-use crate::xml_snippets::{write_invalid_props_response, write_propstat_response};
+use crate::{
+    tagname::TagName,
+    xml_snippets::{write_invalid_props_response, write_propstat_response},
+};
 
 // A resource is identified by a URI and has properties
 // A resource can also be a collection
@@ -17,7 +20,8 @@ use crate::xml_snippets::{write_invalid_props_response, write_propstat_response}
 pub trait Resource: Sized {
     type MemberType: Resource;
     type UriComponents: Sized; // defines how the resource URI maps to parameters, i.e. /{principal}/{calendar} -> (String, String)
-    type PropType: FromStr + VariantNames;
+    type PropType: FromStr + VariantNames + Into<&'static str> + EnumProperty + Clone;
+    type PropResponse: Serialize;
 
     async fn acquire_from_request(
         req: HttpRequest,
@@ -32,7 +36,7 @@ pub trait Resource: Sized {
     fn list_dead_props() -> &'static [&'static str] {
         Self::PropType::VARIANTS
     }
-    fn write_prop<W: Write>(&self, writer: &mut Writer<W>, prop: Self::PropType) -> Result<()>;
+    fn get_prop(&self, prop: Self::PropType) -> Result<Self::PropResponse>;
 }
 
 pub trait HandlePropfind {
@@ -59,13 +63,12 @@ impl<R: Resource> HandlePropfind for R {
             for prop in props {
                 if let Ok(valid_prop) = R::PropType::from_str(prop) {
                     // TODO: Fix error types
-                    match self
-                        .write_prop(writer, valid_prop)
-                        .map_err(|_e| quick_xml::Error::TextNotFound)
-                    {
-                        // TODO: clean this mess up
-                        Ok(_) => {}
-                        // not really an invalid prop, but some error happened
+                    match self.get_prop(valid_prop.clone()) {
+                        Ok(response) => {
+                            writer
+                                .write_serializable(valid_prop.tagname(), &response)
+                                .map_err(|_e| quick_xml::Error::TextNotFound)?;
+                        }
                         Err(_) => invalid_props.push(prop),
                     };
                 } else {