From c946148d1cbd69333d34b85aa3ab0fab3b6cc0d7 Mon Sep 17 00:00:00 2001
From: David Florness <david@florness.com>
Date: Thu, 25 Jun 2020 13:38:55 -0600
Subject: [PATCH] Exit tallyard if user doesn't give inputs in TUI forms

---
 ui.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/ui.go b/ui.go
index 884ac26..aa2f177 100644
--- a/ui.go
+++ b/ui.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"os"
 	"sort"
 	"strconv"
 	"unicode"
@@ -17,9 +18,18 @@ func tui() (election *Election, merkleRoot []byte, electionKey string) {
 		switch buttonLabel {
 		case "Create Election":
 			election.candidates = createElection()
+			// TODO: slaves should check that len candidates >= 2
+			if election.candidates == nil || len(election.candidates) == 0 {
+				fmt.Printf("no candidates entered; exiting\n")
+				os.Exit(0)
+			}
 			merkleRoot = election.createMerkle(election.candidates)
 		case "Join Election":
 			electionKey := joinElection()
+			if electionKey == "" {
+				fmt.Printf("no election key given; exiting\n")
+				os.Exit(0)
+			}
 			merkleRoot, election.masterID = splitElectionKey(electionKey)
 		}
 	}
-- 
2.38.4