Add leaderboard command and XP winning system

src/database/migrations/0002_leaderboard_bans.cql

@@ -0,0 +1 @@
+ALTER TABLE payphone.users ADD is_banned_from_leaderboard BOOLEAN;

src/database/models.rs

@@ -88,6 +88,7 @@ pub struct User {
     pub last_seen_at: UtcDateTime,
     pub supporter_since: Option<UtcDateTime>,
     pub supporter_until: Option<UtcDateTime>,
+    pub is_banned_from_leaderboard: Option<bool>,
 }
 
 impl<'a> Object<'a> for User {
@@ -101,6 +102,7 @@ impl<'a> Object<'a> for User {
         OffsetDateTime,
         Option<OffsetDateTime>,
         Option<OffsetDateTime>,
+        Option<bool>,
     );
 
     fn from_row(row: Self::Row) -> Self {
@@ -114,6 +116,7 @@ impl<'a> Object<'a> for User {
             last_seen_at: row.6.into(),
             supporter_since: row.7.map(|i| i.into()),
             supporter_until: row.8.map(|i| i.into()),
+            is_banned_from_leaderboard: row.9,
         }
     }
 
@@ -128,6 +131,7 @@ impl<'a> Object<'a> for User {
             value.last_seen_at.into(),
             value.supporter_since.map(|i| i.into()),
             value.supporter_until.map(|i| i.into()),
+            Some(value.is_banned_from_leaderboard.unwrap_or(false)),
         )
     }
 }
@@ -153,7 +157,8 @@ impl User {
                         joined_at,
                         last_seen_at,
                         supporter_since,
-                        supporter_until
+                        supporter_until,
+                        is_banned_from_leaderboard
                     FROM
                         payphone.users
                     WHERE
@@ -191,8 +196,9 @@ impl User {
                         joined_at,
                         last_seen_at,
                         supporter_since,
-                        supporter_until
-                    ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?);
+                        supporter_until,
+                        is_banned_from_leaderboard
+                    ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?);
                 "#,
                 Self::to_row(self.clone()),
             )
@@ -261,10 +267,38 @@ impl From<TwilightUser> for User {
             last_seen_at: UtcDateTime::now(),
             supporter_since: None,
             supporter_until: None,
+            is_banned_from_leaderboard: None,
         }
     }
 }
 
+/// Gets a user from the DB and sets their last seen timestamp or inserts a new user from Discord.
+///
+/// Arguments:
+/// * `user` - The Twilight user to get or create.
+/// * `session` - The Scylla session to use for database operations.
+///
+/// Returns:
+/// [`Result<User, DatabaseError>`] - The user from the database or a new user created from
+/// Discord.
+pub async fn get_or_create_user_and_set_last_seen(
+    user: TwilightUser,
+    session: &Session,
+) -> Result<User, DatabaseError> {
+    let db_user = User::get_by_id(user.id.get(), session).await?;
+
+    if let Some(mut user) = db_user {
+        user.last_seen_at = UtcDateTime::now();
+
+        return Ok(user);
+    }
+
+    let new_user = User::from(user);
+    new_user.insert(session).await?;
+
+    Ok(new_user)
+}
+
 #[derive(Debug, Clone)]
 pub struct Server {
     pub id: u64,