Add support for building webfinger for multiple URLs with type

Update `build_webfinger_response` to accept `Vec<(Url, Option<&str>)>`
where `Url` is the ActivityPub ID and `&str` is the optional type.

src/fetch/webfinger.rs

@@ -95,10 +95,11 @@ where
 /// build_webfinger_response(subject, url);
 /// # Ok::<(), anyhow::Error>(())
 /// ```
-pub fn build_webfinger_response(subject: String, url: Url) -> Webfinger {
+pub fn build_webfinger_response(subject: String, url: Vec<(Url, Option<&str>)>) -> Webfinger {
     Webfinger {
         subject,
-        links: vec![
+        links: url.iter().fold(vec![], |mut acc, (url, kind)| {
+            acc.extend(vec![
                 WebfingerLink {
                     rel: Some("http://webfinger.net/rel/profile-page".to_string()),
                     kind: Some("text/html".to_string()),
@@ -108,10 +109,21 @@ pub fn build_webfinger_response(subject: String, url: Url) -> Webfinger {
                 WebfingerLink {
                     rel: Some("self".to_string()),
                     kind: Some(FEDERATION_CONTENT_TYPE.to_string()),
-                href: Some(url),
+                    href: Some(url.clone()),
-                properties: Default::default(),
+                    properties: kind
+                        .map(|kind| {
+                            HashMap::from([(
+                                "https://www.w3.org/ns/activitystreams#type"
+                                    .parse::<Url>()
+                                    .expect("parse url"),
+                                kind.to_string(),
+                            )])
+                        })
+                        .unwrap_or_default(),
                 },
-        ],
+            ]);
+            acc
+        }),
         aliases: vec![],
         properties: Default::default(),
     }