feat(activitypub): ThoughtNote AP object and ThoughtsObjectHandler

crates/adapters/activitypub/src/note.rs

@@ -0,0 +1,62 @@
+use activitypub_base::AS_PUBLIC;
+use activitypub_federation::kinds::object::NoteType;
+use chrono::{DateTime, Utc};
+use serde::{Deserialize, Serialize};
+use url::Url;
+
+/// AP Note representing a Thought.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct ThoughtNote {
+    #[serde(rename = "type")]
+    pub kind: NoteType,
+    pub id: Url,
+    pub attributed_to: Url,
+    pub content: String,
+    pub published: DateTime<Utc>,
+    #[serde(skip_serializing_if = "Vec::is_empty", default)]
+    pub to: Vec<String>,
+    #[serde(skip_serializing_if = "Vec::is_empty", default)]
+    pub cc: Vec<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub in_reply_to: Option<Url>,
+    pub sensitive: bool,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub summary: Option<String>,
+}
+
+impl ThoughtNote {
+    pub fn new_public(
+        id: Url, actor_url: Url, content: String, published: DateTime<Utc>,
+        in_reply_to: Option<Url>, sensitive: bool, summary: Option<String>,
+        followers_url: Url,
+    ) -> Self {
+        Self {
+            kind: Default::default(),
+            id, attributed_to: actor_url, content, published,
+            to: vec![AS_PUBLIC.to_string()],
+            cc: vec![followers_url.to_string()],
+            in_reply_to, sensitive, summary,
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn note_serializes_with_public_audience() {
+        let note = ThoughtNote::new_public(
+            "https://example.com/thoughts/1".parse().unwrap(),
+            "https://example.com/users/alice".parse().unwrap(),
+            "Hello world".to_string(),
+            chrono::Utc::now(),
+            None, false, None,
+            "https://example.com/users/alice/followers".parse().unwrap(),
+        );
+        let json = serde_json::to_string(&note).unwrap();
+        assert!(json.contains(AS_PUBLIC));
+        assert!(json.contains("Hello world"));
+    }
+}