feat(users): implement relationships, DMs, proper perms

src/routes/users/find_mutual.rs

@@ -1,11 +1,22 @@
-use revolt_quark::{Error, Result};
+//! Fetch IDs of servers and friends that are mutually shared between the
+//! authenticated user and the target user
 
-use futures::StreamExt;
-use mongodb::bson::{doc, Document};
-use mongodb::options::FindOptions;
+use revolt_quark::models::User;
+use revolt_quark::{Error, Result, perms, Database, Ref};
+
+use rocket::State;
 use rocket::serde::json::Value;
 
 #[get("/<target>/mutual")]
-pub async fn req(/*user: UserRef, target: Ref*/ target: String) -> Result<Value> {
-    todo!()
+pub async fn req(db: &State<Database>, user: User, target: Ref) -> Result<Value> {
+    let target = target.as_user(db).await?;
+
+    if perms(&user).user(&target).calc_user(db).await.get_view_profile() {
+        Ok(json!({
+            "users": db.fetch_mutual_user_ids(&user.id, &target.id).await?,
+            "servers": db.fetch_mutual_server_ids(&user.id, &target.id).await?
+        }))
+    } else {
+        Err(Error::NotFound)
+    }
 }