hopefully don't draw wrong stuff in wrong places

voting.lua

@@ -13,6 +13,8 @@ local function show_vote_welcome()
     -- window shown before player can see the ballot
     -- by making them click the button, we can know their name
 
+    mem.state_vote = "welcome"
+
     if mem.vote_active then
         digiline_send(
             "vote",
@@ -263,6 +265,7 @@ end
 
 
 local function show_vote_ballot(username)
+    mem.state_vote = "ballot"
     local total_pages = math.ceil(#mem.ballot_entries / ENTRIES_PER_PAGE)
     local c1 =
         {
@@ -311,6 +314,7 @@ local function show_vote_ballot(username)
         mem.draw_ballot_username = username
         mem.draw_ballot_i = 1
         mem.draw_ballot_page = page
+        mem.draw_ballot_version = mem.db_version
         interrupt(0.3, "draw_ballot")
     end
 
@@ -399,12 +403,15 @@ if event.type == "program" then
     mem.admin_entries_idx = nil -- stores list selection for "edit" screen
     mem.votes = mem.votes or {} -- user votes
     mem.state_admin = "welcome" -- which admin window is currently displayed
+    mem.state_vote = "welcome"
     mem.sort_type = "sum" -- what sort to use ("sum" or 1,2,3,4)
     mem.ballot_page = 0 -- current ballot page
     mem.vote_active = true
     mem.submit_active = true
     mem.submitter_name = nil
 
+    mem.db_version = mem.db_version or 0
+
     mem.message_welcome_submission = mem.message_welcome_submission or "Welcome to the entry submission for BOTM 2025 decebruary!"
     mem.message_welcome_vote = mem.message_welcome_vote or "Welcome! Please vote for BOTM 2025 decebruary submissions!"
     mem.message_submission_instructions = mem.message_submission_instructions or "Please enter the coords of your build and describe how to get there (what is the closest city, means of transporation, etc)."
@@ -586,6 +593,7 @@ elseif event.type == "digiline" then
                     end
                     show_admin_edit()
                 end
+                mem.db_version = mem.db_version + 1
             elseif event.msg.delete_entry then
                 -- removing selected entry
                 -- TODO either re-index existing votes, or even wipe all of them?!
@@ -603,6 +611,7 @@ elseif event.type == "digiline" then
                     mem.admin_entries_idx = math.min(mem.admin_entries_idx, #mem.entries)
                     show_admin_edit()
                 end
+                mem.db_version = mem.db_version + 1
             elseif event.msg.edit_accept then
                 local entry = mem.entries[mem.admin_entries_idx]
                 if entry then
@@ -618,6 +627,7 @@ elseif event.type == "digiline" then
                     end
                     show_admin_edit()
                 end
+                mem.db_version = mem.db_version + 1
             elseif event.msg.edit_back then
                 mem.state_admin = "welcome"
                 show_admin_welcome()
@@ -695,8 +705,16 @@ elseif event.type == "digiline" then
     end
 elseif event.type == "interrupt" then
     if event.iid == "draw_ballot" then
-        -- TODO if clicker is different, restart? abort?
+        if mem.state_vote ~= "ballot" then
+            goto done
+        end
+        -- TODO if clicker is different, restart? abort? should not happen.
         -- TODO if "database version" changed, restart? abort?
+        if mem.db_version ~= mem.draw_ballot_version then
+            -- ballot possibly has changed, just abort
+            show_vote_welcome()
+            goto done
+        end
         local username = mem.draw_ballot_username
         local i = mem.draw_ballot_i
         local page = mem.draw_ballot_page