From b3a07a5c0fd62f37c4d8e43031d1bbd245f65b67 Mon Sep 17 00:00:00 2001
From: Sloane Perrault <sloane.perrault@gmail.com>
Date: Wed, 21 Sep 2022 09:19:53 -0400
Subject: [PATCH] feat: pad numbers

---
 2021/lib/advent_of_code.ex                    | 15 ++++++++++++---
 2021/lib/advent_of_code/day0.ex               |  0
 2021/lib/advent_of_code/day0/part0.ex         | 11 -----------
 2021/lib/mix/advent_of_code.ex                |  9 ++-------
 2021/priv/inputs/0.0.input                    |  3 ---
 2021/test/advent_of_code/day0/part_0_test.exs |  7 -------
 2021/test/advent_of_code_test.exs             | 14 +++++++++++---
 7 files changed, 25 insertions(+), 34 deletions(-)
 delete mode 100644 2021/lib/advent_of_code/day0.ex
 delete mode 100644 2021/lib/advent_of_code/day0/part0.ex
 delete mode 100644 2021/priv/inputs/0.0.input
 delete mode 100644 2021/test/advent_of_code/day0/part_0_test.exs

diff --git a/2021/lib/advent_of_code.ex b/2021/lib/advent_of_code.ex
index f8016fb..42478ec 100644
--- a/2021/lib/advent_of_code.ex
+++ b/2021/lib/advent_of_code.ex
@@ -5,8 +5,17 @@ defmodule AdventOfCode do
 
   def solver(selector) do
     [day, part] = String.split(selector, ".")
-    day_module = Macro.camelize("Day#{day}")
-    part_module = Macro.camelize("Part#{part}")
-    Module.concat([AdventOfCode, day_module, part_module])
+    part_module(day, part)
   end
+
+  def part_module(day, part) do
+    Module.concat(day_module(day), Macro.camelize("Part#{part_number(part)}"))
+  end
+
+  def day_module(day) do
+    Module.concat(AdventOfCode, Macro.camelize("Day#{day_number(day)}"))
+  end
+
+  defp day_number(day), do: String.pad_leading(day, 2, "0")
+  defp part_number(part), do: String.trim_leading(part, "0")
 end
diff --git a/2021/lib/advent_of_code/day0.ex b/2021/lib/advent_of_code/day0.ex
deleted file mode 100644
index e69de29..0000000
diff --git a/2021/lib/advent_of_code/day0/part0.ex b/2021/lib/advent_of_code/day0/part0.ex
deleted file mode 100644
index 6c32387..0000000
--- a/2021/lib/advent_of_code/day0/part0.ex
+++ /dev/null
@@ -1,11 +0,0 @@
-defmodule AdventOfCode.Day0.Part0 do
-  alias AdventOfCode.PuzzleSolver
-
-  use PuzzleSolver
-
-  @impl PuzzleSolver
-  def solve(stream) do
-    Stream.run(stream)
-    "42"
-  end
-end
diff --git a/2021/lib/mix/advent_of_code.ex b/2021/lib/mix/advent_of_code.ex
index a012629..8e8cd91 100644
--- a/2021/lib/mix/advent_of_code.ex
+++ b/2021/lib/mix/advent_of_code.ex
@@ -3,11 +3,6 @@ defmodule Mix.AdventOfCode do
   Helpers for `AdventOfCode` mix tasks.
   """
 
-  def day_module(day) do
-    Module.concat(AdventOfCode, Macro.camelize("Day#{day}"))
-  end
-
-  def part_module(day, part) do
-    Module.concat(day_module(day), Macro.camelize("Part#{part}"))
-  end
+  defdelegate day_module(day), to: AdventOfCode
+  defdelegate part_module(day, part), to: AdventOfCode
 end
diff --git a/2021/priv/inputs/0.0.input b/2021/priv/inputs/0.0.input
deleted file mode 100644
index 86e041d..0000000
--- a/2021/priv/inputs/0.0.input
+++ /dev/null
@@ -1,3 +0,0 @@
-foo
-bar
-baz
diff --git a/2021/test/advent_of_code/day0/part_0_test.exs b/2021/test/advent_of_code/day0/part_0_test.exs
deleted file mode 100644
index cd53141..0000000
--- a/2021/test/advent_of_code/day0/part_0_test.exs
+++ /dev/null
@@ -1,7 +0,0 @@
-defmodule AdventOfCode.Day0.Part0Test do
-  use AdventOfCode.PuzzleCase, module: AdventOfCode.Day0.Part0
-
-  test "returns the answer to live the universe and everything" do
-    assert_solution "life the universe and everything", "42"
-  end
-end
diff --git a/2021/test/advent_of_code_test.exs b/2021/test/advent_of_code_test.exs
index 589fa60..e9a64bb 100644
--- a/2021/test/advent_of_code_test.exs
+++ b/2021/test/advent_of_code_test.exs
@@ -5,9 +5,17 @@ defmodule AdventOfCodeTest do
 
   describe "solver/1" do
     test "returns a module for a solver" do
-      assert solver("1.1") == AdventOfCode.Day1.Part1
-      assert solver("2.2") == AdventOfCode.Day2.Part2
-      assert solver("3.1") == AdventOfCode.Day3.Part1
+      assert solver("1.1") == AdventOfCode.Day01.Part1
+      assert solver("2.2") == AdventOfCode.Day02.Part2
+      assert solver("3.1") == AdventOfCode.Day03.Part1
+    end
+
+    test "returns a solver module for zero padded numbers" do
+      assert solver("01.01") == AdventOfCode.Day01.Part1
+      assert solver("02.2") == AdventOfCode.Day02.Part2
+      assert solver("3.01") == AdventOfCode.Day03.Part1
+      assert solver("12.1") == AdventOfCode.Day12.Part1
+      assert solver("24.02") == AdventOfCode.Day24.Part2
     end
   end
 end