make + button and New dialog option in dialog select dropdown work

functions.lua

@@ -1018,6 +1018,7 @@ local function get_fs_talkdialog(player, n_id, d_id)
 	-- display the window with the text the NPC is saying
 	-- TODO: make name and description likewise editable?
 	-- TODO: make name of dialog and sort option editable?
+	-- TODO: show who owns the npc/is responsible for its talks?
 	if(edit_mode) then
 
 	    -- TODO: sort by name?
@@ -1681,13 +1682,14 @@ minetest.register_on_player_receive_fields(
 
 -- helper function
 yl_speak_up.add_new_dialog = function(dialog, pname)
-	future_d_id = "d_" .. find_next_id(dialog.n_dialogs)
+	next_id = find_next_id(dialog.n_dialogs)
+	future_d_id = "d_" .. next_id
 	-- Initialize empty dialog
 	dialog.n_dialogs[future_d_id] = {
 		d_id = future_d_id,
 		d_type = "text",
 		d_text = "",
-		d_sort = -1 -- TODO
+		d_sort = next_id
 		}
 	-- store that there have been changes to this npc
 	table.insert(yl_speak_up.npc_was_changed[ yl_speak_up.edit_mode[pname] ],
@@ -1752,10 +1754,7 @@ yl_speak_up.edit_mode_apply_changes = function(pname, fields)
 	end
 
 	-- changes to options are not possible if there are none
-	-- TODO: handle adding of a new dialog
+	if(dialog.n_dialogs[ d_id ].d_options) then
-	if(not(dialog.n_dialogs[ d_id ].d_options)) then
-		return
-	end
 
 	-- detect changes to text_option_<o_id>: text for option <o_id>
 	for k, v in pairs(dialog.n_dialogs[ d_id ].d_options) do
@@ -1804,17 +1803,18 @@ yl_speak_up.edit_mode_apply_changes = function(pname, fields)
 				r_value = fields[ "d_id_"..k ]}
 		end
 	end
+	end
 
 	-- add a new dialog; either via "+" button or "New dialog" in dialog dropdown menu
 	-- this has to be done after all the other changes because those (text changes etc.) still
 	-- apply to the *old* dialog
 	if(fields.show_new_dialog
-	  or(fields.d_id and fields.d_id == yl_speak_up.text_new_dialog_id)) then
+	  or(fields["d_id"] and fields["d_id"] == yl_speak_up.text_new_dialog_id)) then
-		-- create the new dialog
+		-- create the new dialog and make sure it gets shown
-		d_id = yl_speak_up.add_new_dialog(dialog, pname)
+		local d_id = yl_speak_up.add_new_dialog(dialog, pname)
 		-- actually show the new dialog
-		fields.d_id = d_id
+		fields["d_id"] = d_id
-		fields.show_new_dialog = nil
+		fields["show_new_dialog"] = nil
 	end
 
 	-- TODO just for debugging
@@ -1930,11 +1930,9 @@ minetest.register_on_player_receive_fields(
         if ( o == "" and edit_mode) then
             -- if nothing better can be found: keep the old dialog
             local show_dialog = d_id
-	    -- "New dialog" button or option from dropdown menu was selected
-	    if(fields.show_new_dialog or (fields.d_id and fields.d_id == yl_speak_up.text_new_option_id)) then
-                -- TODO
             -- dropdown menu was used; provided the dialog exists (and it's not the "New dialog" option)
-            elseif(fields.d_id and fields.d_id ~= show_dialog and dialog.n_dialogs[fields.d_id]) then
+	    -- (if a new dialog was added using the "+" button, fields.d_id gets set accordingly)
+            if(fields.d_id and fields.d_id ~= show_dialog and dialog.n_dialogs[fields.d_id]) then
                 show_dialog = fields.d_id
             -- in edit mode: prev_dialog_../next_dialog_.. was selected
             else