Error typing for rustical_store as well as some refactoring

crates/caldav/src/error.rs

@@ -0,0 +1,44 @@
+use actix_web::{http::StatusCode, HttpResponse};
+
+#[derive(Debug, thiserror::Error)]
+pub enum Error {
+    #[error("Unauthorized")]
+    Unauthorized,
+
+    #[error("Not implemented")]
+    NotImplemented,
+
+    #[error(transparent)]
+    StoreError(#[from] rustical_store::Error),
+
+    #[error(transparent)]
+    DavError(#[from] rustical_dav::Error),
+
+    #[error(transparent)]
+    XmlDecodeError(#[from] quick_xml::DeError),
+
+    #[error(transparent)]
+    Other(#[from] anyhow::Error),
+}
+
+impl actix_web::ResponseError for Error {
+    fn status_code(&self) -> actix_web::http::StatusCode {
+        match self {
+            Error::StoreError(err) => match err {
+                rustical_store::Error::NotFound => StatusCode::NOT_FOUND,
+                _ => StatusCode::INTERNAL_SERVER_ERROR,
+            },
+            Error::DavError(err) => err.status_code(),
+            Error::Unauthorized => StatusCode::UNAUTHORIZED,
+            Error::XmlDecodeError(_) => StatusCode::BAD_REQUEST,
+            Error::NotImplemented => StatusCode::INTERNAL_SERVER_ERROR,
+            Error::Other(_) => StatusCode::INTERNAL_SERVER_ERROR,
+        }
+    }
+    fn error_response(&self) -> actix_web::HttpResponse<actix_web::body::BoxBody> {
+        match self {
+            Error::DavError(err) => err.error_response(),
+            _ => HttpResponse::build(self.status_code()).body(self.to_string()),
+        }
+    }
+}