xml: Add tag_name

crates/dav/src/xml/mod.rs

@@ -1 +1,2 @@
 pub mod tag_list;
+pub mod tag_name;

crates/dav/src/xml/tag_name.rs

@@ -0,0 +1,44 @@
+use serde::{
+    de::{VariantAccess, Visitor},
+    Deserialize,
+};
+
+#[derive(Debug, Clone)]
+pub struct TagName(String);
+
+impl From<TagName> for String {
+    fn from(value: TagName) -> Self {
+        value.0
+    }
+}
+
+impl From<String> for TagName {
+    fn from(value: String) -> Self {
+        Self(value)
+    }
+}
+
+impl<'de> Deserialize<'de> for TagName {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        struct __Visitor;
+
+        impl<'de> Visitor<'de> for __Visitor {
+            type Value = TagName;
+            fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
+                formatter.write_str("tagname")
+            }
+            fn visit_enum<A>(self, data: A) -> Result<Self::Value, A::Error>
+            where
+                A: serde::de::EnumAccess<'de>,
+            {
+                let (name, variant): (String, _) = data.variant()?;
+                VariantAccess::unit_variant(variant)?;
+                Ok(TagName(name))
+            }
+        }
+        deserializer.deserialize_enum("doesn't matter", &[], __Visitor)
+    }
+}