caldav: Add supported-collation-set property

crates/caldav/src/calendar/methods/report/calendar_query/text_match.rs

@@ -10,6 +10,7 @@ pub enum TextCollation {
 
 impl TextCollation {
     // Check whether a haystack contains a needle respecting the collation
+    #[must_use]
     pub fn match_text(&self, needle: &str, haystack: &str) -> bool {
         match self {
             // https://datatracker.ietf.org/doc/html/rfc4790#section-9.2
@@ -21,6 +22,15 @@ impl TextCollation {
     }
 }
 
+impl AsRef<str> for TextCollation {
+    fn as_ref(&self) -> &str {
+        match self {
+            Self::AsciiCasemap => "i;ascii-casemap",
+            Self::Octet => "i;octet",
+        }
+    }
+}
+
 impl ValueDeserialize for TextCollation {
     fn deserialize(val: &str) -> Result<Self, rustical_xml::XmlError> {
         match val {
@@ -60,6 +70,7 @@ pub struct TextMatchElement {
 }
 
 impl TextMatchElement {
+    #[must_use]
     pub fn match_property(&self, property: &Property) -> bool {
         let Self {
             collation,

crates/caldav/src/calendar/methods/report/mod.rs

@@ -27,7 +27,7 @@ use sync_collection::handle_sync_collection;
 use tracing::instrument;
 
 mod calendar_multiget;
-mod calendar_query;
+pub mod calendar_query;
 mod sync_collection;
 
 #[derive(XmlDeserialize, XmlDocument, Clone, Debug, PartialEq)]