From 887c5c52c1bcfda3b41859644875950d88baf223 Mon Sep 17 00:00:00 2001
From: Lennart <18233294+lennart-k@users.noreply.github.com>
Date: Wed, 29 May 2024 13:52:50 +0200
Subject: [PATCH] Add TagList implementation for XML

---
 crates/dav/src/xml/mod.rs      |  1 +
 crates/dav/src/xml/tag_list.rs | 64 ++++++++++++++++++++++++++++++++++
 crates/dav/tests/tag_list.rs   | 48 +++++++++++++++++++++++++
 3 files changed, 113 insertions(+)
 create mode 100644 crates/dav/src/xml/mod.rs
 create mode 100644 crates/dav/src/xml/tag_list.rs
 create mode 100644 crates/dav/tests/tag_list.rs

diff --git a/crates/dav/src/xml/mod.rs b/crates/dav/src/xml/mod.rs
new file mode 100644
index 0000000..646bf1c
--- /dev/null
+++ b/crates/dav/src/xml/mod.rs
@@ -0,0 +1 @@
+pub mod tag_list;
diff --git a/crates/dav/src/xml/tag_list.rs b/crates/dav/src/xml/tag_list.rs
new file mode 100644
index 0000000..6a8a970
--- /dev/null
+++ b/crates/dav/src/xml/tag_list.rs
@@ -0,0 +1,64 @@
+use serde::ser::SerializeMap;
+
+use serde::{
+    de::{MapAccess, Visitor},
+    Deserialize, Serialize,
+};
+
+#[derive(Clone, Debug, PartialEq)]
+pub struct TagList(Vec<String>);
+
+struct TagListVisitor;
+
+impl<'de> Visitor<'de> for TagListVisitor {
+    type Value = TagList;
+
+    fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
+        formatter.write_str("TagList")
+    }
+
+    fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error>
+    where
+        A: MapAccess<'de>,
+    {
+        let mut tags = Vec::new();
+        while let Some(key) = map.next_key::<String>()? {
+            tags.push(key);
+        }
+        Ok(TagList(tags))
+    }
+}
+
+impl<'de> Deserialize<'de> for TagList {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        deserializer.deserialize_map(TagListVisitor)
+    }
+}
+
+impl Serialize for TagList {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        let mut map = serializer.serialize_map(Some(self.0.len()))?;
+        for name in &self.0 {
+            map.serialize_entry(&name, &())?;
+        }
+        map.end()
+    }
+}
+
+impl From<TagList> for Vec<String> {
+    fn from(value: TagList) -> Self {
+        value.0
+    }
+}
+
+impl From<Vec<String>> for TagList {
+    fn from(value: Vec<String>) -> Self {
+        Self(value)
+    }
+}
diff --git a/crates/dav/tests/tag_list.rs b/crates/dav/tests/tag_list.rs
new file mode 100644
index 0000000..aa04c44
--- /dev/null
+++ b/crates/dav/tests/tag_list.rs
@@ -0,0 +1,48 @@
+use rustical_dav::xml::tag_list::TagList;
+use serde::{Deserialize, Serialize};
+
+const INPUT: &str = r#"<Document>
+    <prop>
+        <nicename/>
+        <anotherprop/>
+    </prop>
+</Document>"#;
+
+#[derive(Serialize, Deserialize, Debug, Clone, PartialEq)]
+#[serde(rename_all = "kebab-case")]
+struct PropElement {
+    #[serde(flatten)]
+    tags: TagList,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone, PartialEq)]
+#[serde(rename_all = "kebab-case")]
+struct Document {
+    prop: PropElement,
+}
+
+fn expected_output() -> Document {
+    Document {
+        prop: PropElement {
+            tags: vec!["nicename".to_owned(), "anotherprop".to_owned()].into(),
+        },
+    }
+}
+
+#[test]
+fn test_tagname_deserialize() {
+    let result: Document = quick_xml::de::from_str(INPUT).unwrap();
+    assert_eq!(result, expected_output());
+}
+
+#[test]
+fn test_tagname_serialize() {
+    let mut result = String::new();
+    let mut ser = quick_xml::se::Serializer::new(&mut result);
+    ser.indent(' ', 4);
+
+    let to_serialize = &expected_output();
+    to_serialize.serialize(ser).unwrap();
+
+    assert_eq!(result, INPUT);
+}