Update .sqlx files

.sqlx/query-3b00b59f047e534a7f7f654984dc880f4aa9281aae5974722d2f22ec6d15cb32.json

@@ -0,0 +1,20 @@
+{
+  "db_name": "SQLite",
+  "query": "SELECT principal FROM memberships WHERE member_of = ?",
+  "describe": {
+    "columns": [
+      {
+        "name": "principal",
+        "ordinal": 0,
+        "type_info": "Text"
+      }
+    ],
+    "parameters": {
+      "Right": 1
+    },
+    "nullable": [
+      false
+    ]
+  },
+  "hash": "3b00b59f047e534a7f7f654984dc880f4aa9281aae5974722d2f22ec6d15cb32"
+}

Cargo.lock

@@ -2703,6 +2703,8 @@ dependencies = [
  "rustical_xml",
  "serde",
  "sha2",
+ "strum",
+ "strum_macros",
  "thiserror 2.0.12",
  "tokio",
  "tower",
@@ -2733,6 +2735,8 @@ dependencies = [
  "rustical_store",
  "rustical_xml",
  "serde",
+ "strum",
+ "strum_macros",
  "thiserror 2.0.12",
  "tokio",
  "tower",
@@ -2758,6 +2762,7 @@ dependencies = [
  "quick-xml",
  "rustical_xml",
  "serde",
+ "strum",
  "thiserror 2.0.12",
  "tokio",
  "tower",
@@ -3435,6 +3440,25 @@ version = "0.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
 
+[[package]]
+name = "strum"
+version = "0.27.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f64def088c51c9510a8579e3c5d67c65349dcf755e5479ad3d010aa6454e2c32"
+
+[[package]]
+name = "strum_macros"
+version = "0.27.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c77a8c5abcaf0f9ce05d62342b7d298c346515365c36b673df4ebe3ced01fde8"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "rustversion",
+ "syn",
+]
+
 [[package]]
 name = "subtle"
 version = "2.6.1"

README.md

@@ -29,4 +29,4 @@ a CalDAV/CardDAV server
 - DAVx5,
 - GNOME Accounts, GNOME Calendar, GNOME Contacts
 - Evolution
-- Apple Calendar (known issue: If a user is member of multiple groups then Apple Calendar just randomly selects a calendar home)
+- Apple Calendar

crates/caldav/Cargo.toml

@@ -35,3 +35,5 @@ rustical_ical.workspace = true
 http.workspace = true
 headers.workspace = true
 tower-http.workspace = true
+strum.workspace = true
+strum_macros.workspace = true

crates/caldav/src/calendar/prop.rs

@@ -1,6 +1,7 @@
 use derive_more::derive::{From, Into};
 use rustical_ical::CalendarObjectType;
 use rustical_xml::{XmlDeserialize, XmlSerialize};
+use strum_macros::VariantArray;
 
 #[derive(Debug, Clone, XmlSerialize, XmlDeserialize, PartialEq, From, Into)]
 pub struct SupportedCalendarComponent {
@@ -58,39 +59,12 @@ pub struct SupportedCalendarData {
     calendar_data: CalendarData,
 }
 
-#[derive(Debug, Clone, XmlSerialize, PartialEq)]
+#[derive(Debug, Clone, XmlSerialize, PartialEq, VariantArray)]
 pub enum ReportMethod {
+    #[xml(ns = "rustical_dav::namespace::NS_CALDAV")]
     CalendarQuery,
+    #[xml(ns = "rustical_dav::namespace::NS_CALDAV")]
     CalendarMultiget,
+    #[xml(ns = "rustical_dav::namespace::NS_DAV")]
     SyncCollection,
 }
-
-#[derive(Debug, Clone, XmlSerialize, PartialEq)]
-pub struct ReportWrapper {
-    report: ReportMethod,
-}
-
-// RFC 3253 section-3.1.5
-#[derive(Debug, Clone, XmlSerialize, PartialEq)]
-pub struct SupportedReportSet {
-    #[xml(flatten)]
-    supported_report: Vec<ReportWrapper>,
-}
-
-impl Default for SupportedReportSet {
-    fn default() -> Self {
-        Self {
-            supported_report: vec![
-                ReportWrapper {
-                    report: ReportMethod::CalendarQuery,
-                },
-                ReportWrapper {
-                    report: ReportMethod::CalendarMultiget,
-                },
-                ReportWrapper {
-                    report: ReportMethod::SyncCollection,
-                },
-            ],
-        }
-    }
-}

crates/caldav/src/calendar/resource.rs

@@ -1,5 +1,6 @@
-use super::prop::{SupportedCalendarComponentSet, SupportedCalendarData, SupportedReportSet};
+use super::prop::{SupportedCalendarComponentSet, SupportedCalendarData};
 use crate::Error;
+use crate::calendar::prop::ReportMethod;
 use chrono::{DateTime, Utc};
 use derive_more::derive::{From, Into};
 use rustical_dav::extensions::{
@@ -7,7 +8,7 @@ use rustical_dav::extensions::{
 };
 use rustical_dav::privileges::UserPrivilegeSet;
 use rustical_dav::resource::{PrincipalUri, Resource, ResourceName};
-use rustical_dav::xml::{HrefElement, Resourcetype, ResourcetypeInner};
+use rustical_dav::xml::{HrefElement, Resourcetype, ResourcetypeInner, SupportedReportSet};
 use rustical_dav_push::DavPushExtension;
 use rustical_ical::CalDateTime;
 use rustical_store::Calendar;
@@ -40,8 +41,8 @@ pub enum CalendarProp {
     #[xml(ns = "rustical_dav::namespace::NS_DAV")]
     MaxResourceSize(i64),
     #[xml(skip_deserializing)]
-    #[xml(ns = "rustical_dav::namespace::NS_CALDAV")]
-    SupportedReportSet(SupportedReportSet),
+    #[xml(ns = "rustical_dav::namespace::NS_DAV")]
+    SupportedReportSet(SupportedReportSet<ReportMethod>),
     #[xml(ns = "rustical_dav::namespace::NS_CALENDARSERVER")]
     Source(Option<HrefElement>),
     #[xml(skip_deserializing)]
@@ -150,7 +151,7 @@ impl Resource for CalendarResource {
                 }
                 CalendarPropName::MaxResourceSize => CalendarProp::MaxResourceSize(10000000),
                 CalendarPropName::SupportedReportSet => {
-                    CalendarProp::SupportedReportSet(SupportedReportSet::default())
+                    CalendarProp::SupportedReportSet(SupportedReportSet::all())
                 }
                 CalendarPropName::Source => CalendarProp::Source(
                     self.cal.subscription_url.to_owned().map(HrefElement::from),

crates/caldav/src/calendar/service.rs

@@ -50,7 +50,7 @@ impl<C: CalendarStore, S: SubscriptionStore> ResourceService for CalendarResourc
     type Principal = User;
     type PrincipalUri = CalDavPrincipalUri;
 
-    const DAV_HEADER: &str = "1, 3, access-control, calendar-access";
+    const DAV_HEADER: &str = "1, 3, access-control, calendar-access, calendar-proxy";
 
     async fn get_resource(
         &self,

crates/caldav/src/principal/mod.rs

@@ -2,7 +2,9 @@ use crate::Error;
 use rustical_dav::extensions::CommonPropertiesExtension;
 use rustical_dav::privileges::UserPrivilegeSet;
 use rustical_dav::resource::{PrincipalUri, Resource, ResourceName};
-use rustical_dav::xml::{Resourcetype, ResourcetypeInner};
+use rustical_dav::xml::{
+    GroupMemberSet, GroupMembership, Resourcetype, ResourcetypeInner, SupportedReportSet,
+};
 use rustical_store::auth::User;
 
 mod service;
@@ -13,6 +15,7 @@ pub use prop::*;
 #[derive(Clone)]
 pub struct PrincipalResource {
     principal: User,
+    members: Vec<String>,
 }
 
 impl ResourceName for PrincipalResource {
@@ -32,6 +35,11 @@ impl Resource for PrincipalResource {
         Resourcetype(&[
             ResourcetypeInner(Some(rustical_dav::namespace::NS_DAV), "collection"),
             ResourcetypeInner(Some(rustical_dav::namespace::NS_DAV), "principal"),
+            // https://github.com/apple/ccs-calendarserver/blob/13c706b985fb728b9aab42dc0fef85aae21921c3/doc/Extensions/caldav-proxy.txt
+            ResourcetypeInner(
+                Some(rustical_dav::namespace::NS_CALENDARSERVER),
+                "calendar-proxy-write",
+            ),
         ])
     }
 
@@ -43,14 +51,6 @@ impl Resource for PrincipalResource {
     ) -> Result<Self::Prop, Self::Error> {
         let principal_url = puri.principal_uri(&self.principal.id);
 
-        let home_set = CalendarHomeSet(
-            self.principal
-                .memberships()
-                .into_iter()
-                .map(|principal| puri.principal_uri(principal).into())
-                .collect(),
-        );
-
         Ok(match prop {
             PrincipalPropWrapperName::Principal(prop) => {
                 PrincipalPropWrapper::Principal(match prop {
@@ -60,10 +60,20 @@ impl Resource for PrincipalResource {
                     PrincipalPropName::PrincipalUrl => {
                         PrincipalProp::PrincipalUrl(principal_url.into())
                     }
-                    PrincipalPropName::CalendarHomeSet => PrincipalProp::CalendarHomeSet(home_set),
+                    PrincipalPropName::CalendarHomeSet => {
+                        PrincipalProp::CalendarHomeSet(principal_url.into())
+                    }
                     PrincipalPropName::CalendarUserAddressSet => {
                         PrincipalProp::CalendarUserAddressSet(principal_url.into())
                     }
+                    PrincipalPropName::GroupMemberSet => {
+                        PrincipalProp::GroupMemberSet(GroupMemberSet(
+                            self.members
+                                .iter()
+                                .map(|principal| puri.principal_uri(principal).into())
+                                .collect(),
+                        ))
+                    }
                     PrincipalPropName::GroupMembership => {
                         PrincipalProp::GroupMembership(GroupMembership(
                             self.principal
@@ -74,10 +84,11 @@ impl Resource for PrincipalResource {
                         ))
                     }
                     PrincipalPropName::AlternateUriSet => PrincipalProp::AlternateUriSet,
-                    PrincipalPropName::PrincipalCollectionSet => {
-                        PrincipalProp::PrincipalCollectionSet(PrincipalCollectionSet(
-                            puri.principal_collection().into(),
-                        ))
+                    // PrincipalPropName::PrincipalCollectionSet => {
+                    //     PrincipalProp::PrincipalCollectionSet(puri.principal_collection().into())
+                    // }
+                    PrincipalPropName::SupportedReportSet => {
+                        PrincipalProp::SupportedReportSet(SupportedReportSet::all())
                     }
                 })
             }

crates/caldav/src/principal/prop.rs

@@ -1,6 +1,10 @@
-use rustical_dav::{extensions::CommonPropertiesProp, xml::HrefElement};
+use rustical_dav::{
+    extensions::CommonPropertiesProp,
+    xml::{GroupMemberSet, GroupMembership, HrefElement, SupportedReportSet},
+};
 use rustical_store::auth::user::PrincipalType;
 use rustical_xml::{EnumVariants, PropName, XmlDeserialize, XmlSerialize};
+use strum_macros::VariantArray;
 
 #[derive(XmlDeserialize, XmlSerialize, PartialEq, Clone, EnumVariants, PropName)]
 #[xml(unit_variants_ident = "PrincipalPropName")]
@@ -16,14 +20,18 @@ pub enum PrincipalProp {
     PrincipalUrl(HrefElement),
     #[xml(ns = "rustical_dav::namespace::NS_DAV")]
     GroupMembership(GroupMembership),
+    #[xml(ns = "rustical_dav::namespace::NS_DAV")]
+    GroupMemberSet(GroupMemberSet),
     #[xml(ns = "rustical_dav::namespace::NS_DAV", rename = b"alternate-URI-set")]
     AlternateUriSet,
-    #[xml(ns = "rustical_dav::namespace::NS_DAV")]
-    PrincipalCollectionSet(PrincipalCollectionSet),
+    // #[xml(ns = "rustical_dav::namespace::NS_DAV")]
+    // PrincipalCollectionSet(HrefElement),
+    #[xml(ns = "rustical_dav::namespace::NS_DAV", skip_deserializing)]
+    SupportedReportSet(SupportedReportSet<ReportMethod>),
 
     // CalDAV (RFC 4791)
     #[xml(ns = "rustical_dav::namespace::NS_CALDAV")]
-    CalendarHomeSet(CalendarHomeSet),
+    CalendarHomeSet(HrefElement),
 }
 
 #[derive(XmlDeserialize, XmlSerialize, PartialEq, Clone, EnumVariants, PropName)]
@@ -33,11 +41,9 @@ pub enum PrincipalPropWrapper {
     Common(CommonPropertiesProp),
 }
 
-#[derive(XmlDeserialize, XmlSerialize, PartialEq, Clone)]
-pub struct CalendarHomeSet(#[xml(ty = "untagged", flatten)] pub(super) Vec<HrefElement>);
-
-#[derive(XmlDeserialize, XmlSerialize, PartialEq, Clone)]
-pub struct GroupMembership(#[xml(ty = "untagged", flatten)] pub(super) Vec<HrefElement>);
-
-#[derive(XmlDeserialize, XmlSerialize, PartialEq, Clone)]
-pub struct PrincipalCollectionSet(#[xml(ty = "untagged")] pub(super) HrefElement);
+#[derive(XmlSerialize, PartialEq, Clone, VariantArray)]
+pub enum ReportMethod {
+    // We don't actually support principal-match
+    #[xml(ns = "rustical_dav::namespace::NS_DAV")]
+    PrincipalMatch,
+}

crates/caldav/src/principal/service.rs

@@ -43,7 +43,7 @@ impl<AP: AuthenticationProvider, S: SubscriptionStore, CS: CalendarStore> Resour
     type Principal = User;
     type PrincipalUri = CalDavPrincipalUri;
 
-    const DAV_HEADER: &str = "1, 3, access-control, calendar-access";
+    const DAV_HEADER: &str = "1, 3, access-control, calendar-access, calendar-proxy";
 
     async fn get_resource(
         &self,
@@ -54,7 +54,10 @@ impl<AP: AuthenticationProvider, S: SubscriptionStore, CS: CalendarStore> Resour
             .get_principal(principal)
             .await?
             .ok_or(crate::Error::NotFound)?;
-        Ok(PrincipalResource { principal: user })
+        Ok(PrincipalResource {
+            members: self.auth_provider.list_members(&user.id).await?,
+            principal: user,
+        })
     }
 
     async fn get_members(

crates/carddav/Cargo.toml

@@ -32,3 +32,5 @@ http.workspace = true
 tower-http.workspace = true
 percent-encoding.workspace = true
 ical.workspace = true
+strum.workspace = true
+strum_macros.workspace = true

crates/carddav/src/addressbook/prop.rs

@@ -1,6 +1,10 @@
-use rustical_dav::extensions::{CommonPropertiesProp, SyncTokenExtensionProp};
+use rustical_dav::{
+    extensions::{CommonPropertiesProp, SyncTokenExtensionProp},
+    xml::SupportedReportSet,
+};
 use rustical_dav_push::DavPushExtensionProp;
 use rustical_xml::{EnumVariants, PropName, XmlDeserialize, XmlSerialize};
+use strum_macros::VariantArray;
 
 #[derive(XmlDeserialize, XmlSerialize, PartialEq, Clone, EnumVariants, PropName)]
 #[xml(unit_variants_ident = "AddressbookPropName")]
@@ -10,8 +14,8 @@ pub enum AddressbookProp {
     AddressbookDescription(Option<String>),
     #[xml(ns = "rustical_dav::namespace::NS_CARDDAV", skip_deserializing)]
     SupportedAddressData(SupportedAddressData),
-    #[xml(ns = "rustical_dav::namespace::NS_CARDDAV", skip_deserializing)]
-    SupportedReportSet(SupportedReportSet),
+    #[xml(ns = "rustical_dav::namespace::NS_DAV", skip_deserializing)]
+    SupportedReportSet(SupportedReportSet<ReportMethod>),
     #[xml(ns = "rustical_dav::namespace::NS_DAV")]
     MaxResourceSize(i64),
 }
@@ -56,37 +60,10 @@ impl Default for SupportedAddressData {
     }
 }
 
-#[derive(Debug, Clone, XmlSerialize, PartialEq)]
+#[derive(Debug, Clone, XmlSerialize, PartialEq, VariantArray)]
 pub enum ReportMethod {
     #[xml(ns = "rustical_dav::namespace::NS_CARDDAV")]
     AddressbookMultiget,
+    #[xml(ns = "rustical_dav::namespace::NS_DAV")]
     SyncCollection,
 }
-
-#[derive(Debug, Clone, XmlSerialize, PartialEq)]
-pub struct SupportedReportWrapper {
-    #[xml(ns = "rustical_dav::namespace::NS_CARDDAV")]
-    report: ReportMethod,
-}
-
-// RFC 3253 section-3.1.5
-#[derive(Debug, Clone, XmlSerialize, PartialEq)]
-pub struct SupportedReportSet {
-    #[xml(ns = "rustical_dav::namespace::NS_CARDDAV", flatten)]
-    supported_report: &'static [SupportedReportWrapper],
-}
-
-impl Default for SupportedReportSet {
-    fn default() -> Self {
-        Self {
-            supported_report: &[
-                SupportedReportWrapper {
-                    report: ReportMethod::AddressbookMultiget,
-                },
-                SupportedReportWrapper {
-                    report: ReportMethod::SyncCollection,
-                },
-            ],
-        }
-    }
-}

crates/carddav/src/addressbook/resource.rs

@@ -1,4 +1,4 @@
-use super::prop::{SupportedAddressData, SupportedReportSet};
+use super::prop::SupportedAddressData;
 use crate::Error;
 use crate::addressbook::prop::{
     AddressbookProp, AddressbookPropName, AddressbookPropWrapper, AddressbookPropWrapperName,
@@ -7,7 +7,7 @@ use derive_more::derive::{From, Into};
 use rustical_dav::extensions::{CommonPropertiesExtension, SyncTokenExtension};
 use rustical_dav::privileges::UserPrivilegeSet;
 use rustical_dav::resource::{PrincipalUri, Resource, ResourceName};
-use rustical_dav::xml::{Resourcetype, ResourcetypeInner};
+use rustical_dav::xml::{Resourcetype, ResourcetypeInner, SupportedReportSet};
 use rustical_dav_push::DavPushExtension;
 use rustical_store::Addressbook;
 use rustical_store::auth::User;
@@ -60,7 +60,7 @@ impl Resource for AddressbookResource {
                         AddressbookProp::MaxResourceSize(10000000)
                     }
                     AddressbookPropName::SupportedReportSet => {
-                        AddressbookProp::SupportedReportSet(SupportedReportSet::default())
+                        AddressbookProp::SupportedReportSet(SupportedReportSet::all())
                     }
                     AddressbookPropName::AddressbookDescription => {
                         AddressbookProp::AddressbookDescription(self.0.description.to_owned())

crates/carddav/src/principal/mod.rs

@@ -2,7 +2,9 @@ use crate::Error;
 use rustical_dav::extensions::CommonPropertiesExtension;
 use rustical_dav::privileges::UserPrivilegeSet;
 use rustical_dav::resource::{PrincipalUri, Resource, ResourceName};
-use rustical_dav::xml::{HrefElement, Resourcetype, ResourcetypeInner};
+use rustical_dav::xml::{
+    GroupMemberSet, GroupMembership, HrefElement, Resourcetype, ResourcetypeInner,
+};
 use rustical_store::auth::User;
 
 mod service;
@@ -13,6 +15,7 @@ pub use prop::*;
 #[derive(Debug, Clone)]
 pub struct PrincipalResource {
     principal: User,
+    members: Vec<String>,
 }
 
 impl ResourceName for PrincipalResource {
@@ -41,23 +44,14 @@ impl Resource for PrincipalResource {
         user: &User,
         prop: &PrincipalPropWrapperName,
     ) -> Result<Self::Prop, Self::Error> {
-        let principal_href = HrefElement::new(puri.principal_uri(&user.id));
-
-        let home_set = AddressbookHomeSet(
-            self.principal
-                .memberships()
-                .into_iter()
-                .map(|principal| puri.principal_uri(principal))
-                .map(HrefElement::new)
-                .collect(),
-        );
+        let principal_href = HrefElement::new(puri.principal_uri(&self.principal.id));
 
         Ok(match prop {
             PrincipalPropWrapperName::Principal(prop) => {
                 PrincipalPropWrapper::Principal(match prop {
                     PrincipalPropName::PrincipalUrl => PrincipalProp::PrincipalUrl(principal_href),
                     PrincipalPropName::AddressbookHomeSet => {
-                        PrincipalProp::AddressbookHomeSet(home_set)
+                        PrincipalProp::AddressbookHomeSet(principal_href)
                     }
                     PrincipalPropName::PrincipalAddress => PrincipalProp::PrincipalAddress(None),
                     PrincipalPropName::GroupMembership => {
@@ -69,11 +63,17 @@ impl Resource for PrincipalResource {
                                 .collect(),
                         ))
                     }
+                    PrincipalPropName::GroupMemberSet => {
+                        PrincipalProp::GroupMemberSet(GroupMemberSet(
+                            self.members
+                                .iter()
+                                .map(|principal| puri.principal_uri(principal).into())
+                                .collect(),
+                        ))
+                    }
                     PrincipalPropName::AlternateUriSet => PrincipalProp::AlternateUriSet,
                     PrincipalPropName::PrincipalCollectionSet => {
-                        PrincipalProp::PrincipalCollectionSet(PrincipalCollectionSet(
-                            puri.principal_collection().into(),
-                        ))
+                        PrincipalProp::PrincipalCollectionSet(puri.principal_collection().into())
                     }
                 })
             }

crates/carddav/src/principal/prop.rs

@@ -1,4 +1,7 @@
-use rustical_dav::{extensions::CommonPropertiesProp, xml::HrefElement};
+use rustical_dav::{
+    extensions::CommonPropertiesProp,
+    xml::{GroupMemberSet, GroupMembership, HrefElement},
+};
 use rustical_xml::{EnumVariants, PropName, XmlDeserialize, XmlSerialize};
 
 #[derive(XmlDeserialize, XmlSerialize, PartialEq, Clone, EnumVariants, PropName)]
@@ -10,14 +13,16 @@ pub enum PrincipalProp {
     PrincipalUrl(HrefElement),
     #[xml(ns = "rustical_dav::namespace::NS_DAV")]
     GroupMembership(GroupMembership),
+    #[xml(ns = "rustical_dav::namespace::NS_DAV")]
+    GroupMemberSet(GroupMemberSet),
     #[xml(ns = "rustical_dav::namespace::NS_DAV", rename = b"alternate-URI-set")]
     AlternateUriSet,
     #[xml(ns = "rustical_dav::namespace::NS_DAV")]
-    PrincipalCollectionSet(PrincipalCollectionSet),
+    PrincipalCollectionSet(HrefElement),
 
     // CardDAV (RFC 6352)
     #[xml(ns = "rustical_dav::namespace::NS_CARDDAV")]
-    AddressbookHomeSet(AddressbookHomeSet),
+    AddressbookHomeSet(HrefElement),
     #[xml(ns = "rustical_dav::namespace::NS_CARDDAV")]
     PrincipalAddress(Option<HrefElement>),
 }
@@ -28,12 +33,3 @@ pub enum PrincipalPropWrapper {
     Principal(PrincipalProp),
     Common(CommonPropertiesProp),
 }
-
-#[derive(XmlDeserialize, XmlSerialize, PartialEq, Clone)]
-pub struct AddressbookHomeSet(#[xml(ty = "untagged", flatten)] pub(super) Vec<HrefElement>);
-
-#[derive(XmlDeserialize, XmlSerialize, PartialEq, Clone)]
-pub struct GroupMembership(#[xml(ty = "untagged", flatten)] pub(super) Vec<HrefElement>);
-
-#[derive(XmlDeserialize, XmlSerialize, PartialEq, Clone)]
-pub struct PrincipalCollectionSet(#[xml(ty = "untagged")] pub(super) HrefElement);

crates/carddav/src/principal/service.rs

@@ -65,7 +65,10 @@ impl<A: AddressbookStore, AP: AuthenticationProvider, S: SubscriptionStore> Reso
             .get_principal(principal)
             .await?
             .ok_or(crate::Error::NotFound)?;
-        Ok(PrincipalResource { principal: user })
+        Ok(PrincipalResource {
+            members: self.auth_provider.list_members(&user.id).await?,
+            principal: user,
+        })
     }
 
     async fn get_members(

crates/dav/Cargo.toml

@@ -25,3 +25,4 @@ tracing.workspace = true
 tokio.workspace = true
 http.workspace = true
 headers.workspace = true
+strum.workspace = true

crates/dav/src/xml/group.rs

@@ -0,0 +1,8 @@
+use crate::xml::HrefElement;
+use rustical_xml::{XmlDeserialize, XmlSerialize};
+
+#[derive(XmlDeserialize, XmlSerialize, PartialEq, Clone)]
+pub struct GroupMembership(#[xml(ty = "untagged", flatten)] pub Vec<HrefElement>);
+
+#[derive(XmlDeserialize, XmlSerialize, PartialEq, Clone)]
+pub struct GroupMemberSet(#[xml(ty = "untagged", flatten)] pub Vec<HrefElement>);

crates/dav/src/xml/mod.rs

@@ -11,3 +11,7 @@ pub use tag_list::TagList;
 mod error;
 pub mod sync_collection;
 pub use error::ErrorElement;
+mod report_set;
+pub use report_set::SupportedReportSet;
+mod group;
+pub use group::*;

crates/dav/src/xml/report_set.rs

@@ -0,0 +1,34 @@
+use rustical_xml::XmlSerialize;
+use strum::VariantArray;
+
+// RFC 3253 section-3.1.5
+#[derive(Debug, Clone, XmlSerialize, PartialEq)]
+pub struct SupportedReportSet<T: XmlSerialize + 'static> {
+    #[xml(flatten)]
+    #[xml(ns = "crate::namespace::NS_DAV")]
+    supported_report: Vec<ReportWrapper<T>>,
+}
+
+impl<T: XmlSerialize + Clone + 'static> SupportedReportSet<T> {
+    pub fn new(methods: Vec<T>) -> Self {
+        Self {
+            supported_report: methods
+                .into_iter()
+                .map(|method| ReportWrapper { report: method })
+                .collect(),
+        }
+    }
+
+    pub fn all() -> Self
+    where
+        T: VariantArray,
+    {
+        Self::new(T::VARIANTS.to_vec())
+    }
+}
+
+#[derive(Debug, Clone, XmlSerialize, PartialEq)]
+pub struct ReportWrapper<T: XmlSerialize> {
+    #[xml(ns = "crate::namespace::NS_DAV")]
+    report: T,
+}

crates/store/src/auth/mod.rs

@@ -24,6 +24,7 @@ pub trait AuthenticationProvider: Send + Sync + 'static {
 
     async fn add_membership(&self, principal: &str, member_of: &str) -> Result<(), Error>;
     async fn remove_membership(&self, principal: &str, member_of: &str) -> Result<(), Error>;
+    async fn list_members(&self, principal: &str) -> Result<Vec<String>, Error>;
 }
 
 pub use middleware::AuthenticationMiddleware;

crates/store_sqlite/src/principal_store.rs

@@ -249,4 +249,18 @@ impl AuthenticationProvider for SqlitePrincipalStore {
         .map_err(crate::Error::from)?;
         Ok(())
     }
+
+    #[instrument]
+    async fn list_members(&self, principal: &str) -> Result<Vec<String>, Error> {
+        Ok(sqlx::query!(
+            r#"SELECT principal FROM memberships WHERE member_of = ?"#,
+            principal
+        )
+        .fetch_all(&self.db)
+        .await
+        .map_err(crate::Error::from)?
+        .into_iter()
+        .map(|record| record.principal)
+        .collect())
+    }
 }

crates/xml/derive/src/xml_enum/impl_se.rs

@@ -25,7 +25,11 @@ impl Enum {
                     let prefix = ns
                         .map(|ns| namespaces.get(&ns))
                         .unwrap_or(None)
-                        .map(|prefix| [*prefix, b":"].concat());
+                        .map(|prefix| if !prefix.is_empty() {
+                            [*prefix, b":"].concat()
+                        } else {
+                            vec![]
+                        });
                     let has_prefix = prefix.is_some();
                     let tagname = tag.map(|tag| [&prefix.unwrap_or_default(), tag].concat());
                     let qname = tagname.as_ref().map(|tagname| ::quick_xml::name::QName(tagname));

docs/index.md

@@ -25,4 +25,4 @@ If you still want to play around with it in its current state, absolutely feel f
 - DAVx5,
 - GNOME Accounts, GNOME Calendar, GNOME Contacts
 - Evolution
-- Apple Calendar (known issue: If a user is member of multiple groups then Apple Calendar just randomly selects a calendar home)
+- Apple Calendar

docs/installation.md

@@ -29,8 +29,7 @@ docker run --rm -it -v YOUR_DATA_DIR:/var/lib/rustical/ ghcr.io/lennart-k/rustic
 This is also the place to set up **groups**.
 Groups and rooms are also just principals and you can specify them as such using the `--principal-type` parameter.
 To assign a user to a group you can use the `rustical membership` command. Being a member to a principal means that you can completely act on their behalf and see their collections.
-
-**Note:** Apple Calendar doesn't play well with the current membership implementation so you might not want to set up groups at the moment.
+**Note:** Many clients don't support autodiscovery of principals a user is a member of. In that case you'd have to set up multiple CalDAV profiles in your client with the respective principal URLs.
 
 ## Password vs app tokens