chore: migrate authifier into codebase (#658)

Co-authored-by: izzy <me@insrt.uk>
Signed-off-by: Zomatree <me@zomatree.live>
Signed-off-by: izzy <me@insrt.uk>

crates/delta/src/routes/mfa/totp_disable.rs

@@ -0,0 +1,49 @@
+//! Disable TOTP 2FA.
+//! DELETE /mfa/totp
+use revolt_database::{Database, Account, ValidatedTicket, Totp};
+use revolt_result::Result;
+use rocket::State;
+use rocket_empty::EmptyResponse;
+
+/// # Disable TOTP 2FA
+///
+/// Disable TOTP 2FA for an account.
+#[openapi(tag = "MFA")]
+#[delete("/totp")]
+pub async fn totp_disable(
+    db: &State<Database>,
+    mut account: Account,
+    _ticket: ValidatedTicket,
+) -> Result<EmptyResponse> {
+    // Disable TOTP
+    account.mfa.totp_token = Totp::Disabled;
+
+    // Save model to database
+    account.save(db).await.map(|_| EmptyResponse)
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::{rocket, util::test::TestHarness};
+    use revolt_database::MFATicket;
+    use rocket::http::{Header, Status};
+
+    #[rocket::async_test]
+    async fn success() {
+        let harness = TestHarness::new().await;
+        let (account, session, _) = harness.new_user().await;
+
+        let ticket = MFATicket::new(account.id, true);
+        ticket.save(&harness.db).await.unwrap();
+
+
+        let res = harness.client
+            .delete("/auth/mfa/totp")
+            .header(Header::new("X-Session-Token", session.token.clone()))
+            .header(Header::new("X-MFA-Ticket", ticket.token))
+            .dispatch()
+            .await;
+
+        assert_eq!(res.status(), Status::NoContent);
+    }
+}