From bae49bcb47b86df9c7ae2ca28603afd7acb20146 Mon Sep 17 00:00:00 2001
From: Bat <baptiste@gelez.xyz>
Date: Sat, 12 May 2018 22:34:13 +0100
Subject: [PATCH] Broadcast delete to AP

---
 src/activity_pub/activity.rs | 44 ++++++++++++++++++++++++++++++++++++
 src/models/likes.rs          | 19 ++++++++++++++++
 src/routes/likes.rs          |  4 ++--
 3 files changed, 65 insertions(+), 2 deletions(-)

diff --git a/src/activity_pub/activity.rs b/src/activity_pub/activity.rs
index b318b5b..50e38e0 100644
--- a/src/activity_pub/activity.rs
+++ b/src/activity_pub/activity.rs
@@ -95,6 +95,50 @@ impl Activity for Create {
     }
 }
 
+#[derive(Clone)]
+pub struct Delete {
+    id: String,
+    actor: serde_json::Value,
+    object: serde_json::Value,
+    date: chrono::DateTime<chrono::Utc>
+}
+
+impl Delete {
+    pub fn new<A: Actor, B: Object>(actor: &A, obj: &B, conn: &PgConnection) -> Delete {
+        Delete {
+            id: format!("{}#delete", obj.compute_id(conn)),
+            actor: serde_json::Value::String(actor.compute_id(conn)),
+            object: serde_json::Value::String(obj.compute_id(conn)),
+            date: chrono::Utc::now()
+        }
+    }
+}
+
+impl Activity for Delete {
+    fn get_id(&self) -> String {
+        self.id.clone()
+    }
+
+    fn get_type(&self) -> String {
+        "Delete".to_string()
+    }
+
+    fn serialize(&self) -> serde_json::Value {
+        json!({
+            "type": "Delete",
+            "id": self.id,
+            "actor": self.actor,
+            "object": {
+                "type": "Tombstone",
+                "id": self.object
+            },
+            "published": self.date.to_rfc3339(),
+            "to": self.object["to"],
+            "cc": self.object["cc"]
+        })
+    }
+}
+
 #[derive(Clone)]
 pub struct Follow {
     id: String,
diff --git a/src/models/likes.rs b/src/models/likes.rs
index 2591d58..c648d44 100644
--- a/src/models/likes.rs
+++ b/src/models/likes.rs
@@ -1,6 +1,9 @@
 use chrono;
 use diesel::{self, PgConnection, QueryDsl, RunQueryDsl, ExpressionMethods};
+use serde_json;
 
+use activity_pub::actor::Actor;
+use activity_pub::object::Object;
 use models::posts::Post;
 use models::users::User;
 use schema::likes;
@@ -49,3 +52,19 @@ impl Like {
         diesel::delete(self).execute(conn).unwrap();
     }
 }
+
+impl Object for Like {
+    fn serialize(&self, conn: &PgConnection) -> serde_json::Value {
+        json!({
+            "id": self.compute_id(conn)
+        })
+    }
+
+    fn compute_id(&self, conn: &PgConnection) -> String {
+        format!(
+            "{}/like/{}",
+            User::get(conn, self.user_id).unwrap().compute_id(conn),
+            Post::get(conn, self.post_id).unwrap().compute_id(conn)
+        )
+    }
+}
diff --git a/src/routes/likes.rs b/src/routes/likes.rs
index 22b8a36..599a075 100644
--- a/src/routes/likes.rs
+++ b/src/routes/likes.rs
@@ -1,6 +1,6 @@
 use rocket::response::Redirect;
 
-use activity_pub::activity::Like;
+use activity_pub::activity::{Like, Delete};
 use activity_pub::outbox::broadcast;
 use db_conn::DbConn;
 use models::likes;
@@ -21,7 +21,7 @@ fn create(blog: String, slug: String, user: User, conn: DbConn) -> Redirect {
     } else {
         let like = likes::Like::for_user_on_post(&*conn, &user, &post).unwrap();
         like.delete(&*conn);
-        // TODO: send Delete to AP
+        broadcast(&*conn, &user, Delete::new(&user, &like, &*conn), user.get_followers(&*conn));
     }
     
     Redirect::to(format!("/~/{}/{}/", blog, slug).as_ref())