chore: implement invite join and rauth conf

src/routes/invites/invite_join.rs

@@ -1,8 +1,35 @@
-use revolt_quark::{Error, Result};
+use revolt_quark::{Error, Result, Ref, models::{User, Invite}, Db};
 
 use rocket::serde::json::Value;
 
+use crate::util::variables::MAX_SERVER_COUNT;
+
 #[post("/<target>")]
-pub async fn req(/*user: UserRef, target: Ref*/ target: String) -> Result<Value> {
-    todo!()
+pub async fn req(db: &Db, user: User, target: Ref) -> Result<Value> {
+    if user.bot.is_some() {
+        return Err(Error::IsBot)
+    }
+
+    if !user.can_acquire_server(db).await? {
+        return Err(Error::TooManyServers {
+            max: *MAX_SERVER_COUNT
+        })
+    }
+
+    let invite = target.as_invite(db).await?;
+    match &invite {
+        Invite::Server { channel, server, .. } => {
+            let channel = db.fetch_channel(channel).await?;
+            let server = db.fetch_server(server).await?;
+
+            db.insert_member(&server.id, &user.id).await?;
+
+            Ok(json!({
+                "type": "Server",
+                "channel": channel,
+                "server": server
+            }))
+        }
+        _ => unreachable!()
+    }
 }