1 files changed, 29 insertions, 0 deletions
diff --git a/app/lib/dice.rb b/app/lib/dice.rb
new file mode 100644
index 0000000..3b6df48
--- /dev/null
+++ b/app/lib/dice.rb
@@ -0,0 +1,29 @@
+module Dice
+  # @param sides [Integer]
+  # @return [Dice::Result]
+  def self.roll(sides)
+    result = Dice::Result.new
+    result.add_roll Dice::Roll.new(sides)
+    result
+  end
+
+  # @param formula [String]
+  def self.roll_formula(formula)
+    # Will add other delimiters later.
+    parts = formula.split("d")
+
+    if parts.length < 2
+      raise "Invalid formula: #{formula}"
+    end
+
+    num_dice = parts[0].empty? ? 1 : parts[0].to_i
+    sides = parts[1].to_i
+
+    result = Dice::Result.new
+    num_dice.times do
+      result.add_roll Dice::Roll.new(sides)
+    end
+
+    result
+  end
+end