feat(core): implement channel invite model

closes #268

crates/core/database/src/drivers/reference.rs

@@ -2,13 +2,17 @@ use std::{collections::HashMap, sync::Arc};
 
 use futures::lock::Mutex;
 
-use crate::{Bot, Channel, File, Member, MemberCompositeKey, Server, User, UserSettings, Webhook};
+use crate::{
+    Bot, Channel, File, Invite, Member, MemberCompositeKey, Server, User, UserSettings, Webhook,
+};
 
 database_derived!(
     /// Reference implementation
     #[derive(Default)]
     pub struct ReferenceDb {
         pub bots: Arc<Mutex<HashMap<String, Bot>>>,
+        pub channels: Arc<Mutex<HashMap<String, Channel>>>,
+        pub channel_invites: Arc<Mutex<HashMap<String, Invite>>>,
         pub channel_webhooks: Arc<Mutex<HashMap<String, Webhook>>>,
         pub user_settings: Arc<Mutex<HashMap<String, UserSettings>>>,
         pub users: Arc<Mutex<HashMap<String, User>>>,
@@ -20,8 +24,6 @@ database_derived!(
         pub safety_snapshots: Arc<Mutex<HashMap<String, ()>>>,
         pub emoji: Arc<Mutex<HashMap<String, ()>>>,
         pub messages: Arc<Mutex<HashMap<String, ()>>>,
-        pub channels: Arc<Mutex<HashMap<String, Channel>>>,
-        pub channel_invites: Arc<Mutex<HashMap<String, ()>>>,
         pub channel_unreads: Arc<Mutex<HashMap<String, ()>>>,
     }
 );