raise exception for poorly formatted dice

This minor change should raise an exception when certain dice rolls
start with a 0.

closes #177

dice_maiden.rb

@@ -1,6 +1,6 @@
 # Dice bot for Discord
 # Author: Humblemonk
-# Version: 8.7.1
+# Version: 8.7.2
 # Copyright (c) 2017. All rights reserved.
 # !/usr/bin/ruby
 # If you wish to run a single instance of this bot, please follow the "Manual Install" section of the readme!

doc/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 8.7.2 - 2024-04-03
+### Added
+- Introduced logic to better handle poorly crafted dice rolls
+
 ## 8.7.1 - 2024-03-28
 ### Added
 - Removed rest client API functionality

src/dice_maiden_logic.rb

@@ -146,6 +146,9 @@ def convert_input_to_rpn_queue(event, input)
   while input_queue.length > 0
     input_queue_peek = input_queue.last
 
+    # raise an error if input queue starts with a 0
+    raise 'Invalid dice format!' if input_queue_peek.match?(/\A0/)
+
     if input_queue_peek.match?(/\b\d+\b/) # If constant in string form
       output_queue.prepend(Integer(input_queue.pop))