Send email when preparing 2FA JsonError

src/api/core/two_factor/email.rs

@@ -58,6 +58,13 @@ fn send_email_login(data: JsonUpcase<SendEmailLoginData>, conn: DbConn) -> Empty
     let type_ = TwoFactorType::Email as i32;
     let mut twofactor = TwoFactor::find_by_user_and_type(&user.uuid, type_, &conn)?;
 
+    prepare_send_token(&mut twofactor, &conn)?;
+
+    Ok(())
+}
+
+/// Generate the token, save the data for later verification and send email to user
+pub fn prepare_send_token(twofactor: &mut TwoFactor, conn: &DbConn) -> EmptyResult {
     let generated_token = generate_token(CONFIG.email_token_size())?;
     let mut twofactor_data = EmailTokenData::from_json(&twofactor.data)?;
     twofactor_data.set_token(generated_token);

src/api/identity.rs

@@ -293,13 +293,19 @@ fn _json_err_twofactor(providers: &[i32], user_uuid: &str, conn: &DbConn) -> Api
             }
 
             Some(tf_type @ TwoFactorType::Email) => {
-                let twofactor = match TwoFactor::find_by_user_and_type(user_uuid, tf_type as i32, &conn) {
+                use crate::api::core::two_factor as _tf;
+
+                let mut twofactor = match TwoFactor::find_by_user_and_type(user_uuid, tf_type as i32, &conn) {
                     Some(tf) => tf,
                     None => err!("No twofactor email registered"),
                 };
 
-                let email_data = EmailTokenData::from_json(&twofactor.data)?;
+                // Send email immediately if email is the only 2FA option
+                if providers.len() == 1 {
+                    _tf::email::prepare_send_token(&mut twofactor, &conn)?
+                }
 
+                let email_data = EmailTokenData::from_json(&twofactor.data)?;
                 result["TwoFactorProviders2"][provider.to_string()] = json!({
                     "Email": email::obscure_email(&email_data.email),
                 })