feat: improve Node fetching and handling

src/activitystream/node.rs

@@ -11,7 +11,7 @@ pub enum NodeResolutionError {
 }
 
 pub enum Node<T> {
-	Array(Vec<T>),
+	Array(Vec<Node<T>>),
 	Object(T),
 	Link(Box<dyn super::Link>),
 	Empty,
@@ -27,7 +27,7 @@ impl<T> From<Option<T>> for Node<T> {
 }
 
 impl<T> Node<T> {
-	pub fn first(&self) -> Option<&T> {
+	pub fn get(&self) -> Option<&T> {
 		match self {
 			Node::Empty | Node::Link(_) => None,
 			Node::Object(x) => Some(x),
@@ -35,7 +35,7 @@ impl<T> Node<T> {
 		}
 	}
 
-	pub fn items(&self) -> Option<Vec<&T>> {
+	pub fn all(&self) -> Option<Vec<&T>> {
 		match self {
 			Node::Empty | Node::Link(_) => None,
 			Node::Object(x) => Some(vec![x]),
@@ -43,46 +43,49 @@ impl<T> Node<T> {
 				Some(v.iter().map(|x| &x).collect()),
 		}
 	}
-}
 
-impl<T> Node<T>
-where
-	T : super::Base
-{
-	pub fn id(&self) -> Option<&str> {
+	pub fn len(&self) -> usize {
 		match self {
-			Node::Array(v) => v.first()?.id(),
-			Node::Link(x) => Some(x.href()),
-			Node::Object(x) => x.id(),
-			Node::Empty => None,
+			Node::Empty => 0,
+			Node::Link(_) => 0,
+			Node::Object(_) => 1,
+			Node::Array(v) => v.len(),
 		}
 	}
 }
 
-impl<T> Node<T>
-where
-	T : Clone + for<'de> serde::Deserialize<'de>,
-{
-	pub async fn resolve(self) -> Result<T, NodeResolutionError> {
-		match self {
-			Node::Empty => Err(NodeResolutionError::Empty),
-			Node::Object(object) => Ok(object),
-			Node::Array(array) => Ok(
-				array
-					.first()
-					.ok_or(NodeResolutionError::EmptyArray)?
-					.clone()
-			),
-			Node::Link(link) => Ok(
-				reqwest::get(link.href())
-					.await?
-					.json::<T>()
-					.await?
+impl From<serde_json::Value> for Node<serde_json::Value> {
+	fn from(value: serde_json::Value) -> Self {
+		match value {
+			serde_json::Value::String(uri) => Node::Link(Box::new(uri)),
+			serde_json::Value::Object(_) => match value.get("href") {
+				Some(_) => Node::Object(value),
+				None => Node::Link(Box::new(value)),
+			},
+			serde_json::Value::Array(arr) => Node::Array(
+				arr
+					.into_iter()
+					.filter_map(|x| Self::new(x).ok())
+					.collect()
 			),
+			_ => Node::Empty,
 		}
 	}
 }
 
+impl Node<serde_json::Value>{
+	pub async fn fetch(&mut self) -> reqwest::Result<()> {
+		if let Node::Link(link) = self {
+			*self = reqwest::get(link.href())
+				.await?
+				.json::<serde_json::Value>()
+				.await?
+				.into();
+		}
+		Ok(())
+	}
+}
+
 pub trait NodeExtractor {
 	fn node(&self, id: &str) -> Node<serde_json::Value>;
 	fn node_vec(&self, id: &str) -> Node<serde_json::Value>;
@@ -110,41 +113,13 @@ impl NodeExtractor for serde_json::Value {
 	}
 }
 
-#[derive(Debug, thiserror::Error)]
-#[error("json object is wrongly structured")]
-pub struct JsonStructureError;
-
-impl Node<serde_json::Value> {
-	pub fn new(value: serde_json::Value) -> Result<Self, JsonStructureError> {
-		if !(value.is_string() || value.is_object()) {
-			return Err(JsonStructureError);
-		}
-		if value.is_string() || value.get("href").is_some() {
-			Ok(Self::Link(Box::new(value)))
-		} else {
-			Ok(Self::Object(value))
-		}
-	}
-
-	pub fn many(value: serde_json::Value) -> Result<Vec<Self>, JsonStructureError> {
-		if let serde_json::Value::Array(arr) = value {
-			Ok(
-				arr
-					.into_iter()
-					.filter_map(|x| Self::new(x.clone()).ok())
-					.collect()
-			)
-		} else {
-			Ok(vec![Self::new(value)?])
-		}
-	}
-}
 
 
 pub(crate) trait InsertStr {
 	fn insert_str(&mut self, k: &str, v: Option<&str>);
 	fn insert_timestr(&mut self, k: &str, t: Option<chrono::DateTime<chrono::Utc>>);
 }
+
 impl InsertStr for serde_json::Map<String, serde_json::Value> {
 	fn insert_str(&mut self, k: &str, v: Option<&str>) {
 		if let Some(v) = v {