dav: Make reusable for other projects

crates/dav_push/src/extension.rs

@@ -0,0 +1,37 @@
+use crate::Transports;
+use rustical_xml::{EnumUnitVariants, EnumVariants, XmlDeserialize, XmlSerialize};
+
+#[derive(XmlDeserialize, XmlSerialize, PartialEq, Clone, EnumUnitVariants, EnumVariants)]
+#[xml(unit_variants_ident = "DavPushExtensionPropName")]
+pub enum DavPushExtensionProp {
+    // WebDav Push
+    #[xml(skip_deserializing)]
+    #[xml(ns = "rustical_dav::namespace::NS_DAVPUSH")]
+    Transports(Transports),
+    #[xml(ns = "rustical_dav::namespace::NS_DAVPUSH")]
+    Topic(String),
+}
+
+pub trait DavPushExtension {
+    fn get_topic(&self) -> String;
+
+    fn get_prop(
+        &self,
+        prop: &DavPushExtensionPropName,
+    ) -> Result<DavPushExtensionProp, rustical_dav::Error> {
+        Ok(match &prop {
+            DavPushExtensionPropName::Transports => {
+                DavPushExtensionProp::Transports(Default::default())
+            }
+            DavPushExtensionPropName::Topic => DavPushExtensionProp::Topic(self.get_topic()),
+        })
+    }
+
+    fn set_prop(&self, _prop: DavPushExtensionProp) -> Result<(), rustical_dav::Error> {
+        Err(rustical_dav::Error::PropReadOnly)
+    }
+
+    fn remove_prop(&self, _prop: &DavPushExtensionPropName) -> Result<(), rustical_dav::Error> {
+        Err(rustical_dav::Error::PropReadOnly)
+    }
+}