Add CLI default options parsing (Thor)

1 files changed, 43 insertions, 0 deletions

diff --git a/CLI/ruby/bin/game-of-life b/CLI/ruby/bin/game-of-life
index 4d62bac..8abd1e0 100755
--- a/CLI/ruby/bin/game-of-life
+++ b/CLI/ruby/bin/game-of-life
@@ -2,3 +2,46 @@
 # frozen_string_literal: true
 
 require "game_of_life"
+require "thor"
+require "io/console"
+
+class CLI < Thor
+  map %w[-v --version] => :version
+  desc "--version, -v", "Prints the Game of Life version information"
+  def version
+    puts "Game of Life version #{GameOfLife::VERSION}"
+  end
+
+  default_task :start
+  desc "start [OPTIONS]", "Start the Game of Life simulations"
+  class_option "seed",  aliases: "-s", type: :numeric, banner: :SEED,
+                        desc: "Specify the seed number to use as an initial state (default to random)."
+
+  class_option "input", aliases: "-i", type: :string, banner: :VALUE,
+                        desc: "Specify the path/URL for the file to use as an initial state. (used instead of seed)"
+
+  class_option "width", aliases: "-w", type: :numeric, banner: :WIDTH,
+                        desc: "Specify the width of generated universe. (default to terminal width)"
+
+  class_option "height", aliases: "-h", type: :numeric, banner: :HEIGHT,
+                         desc: "Specify the hight of generated universe. (default to terminal height)"
+  def start
+    options_with_defaults = {
+      "height" => IO.console.winsize[0],
+      "width" => IO.console.winsize[1],
+      "seed" => rand(100_000),
+    }.merge(options)
+
+    GameOfLife::Universe.new(options_with_defaults).run
+  end
+
+  class << self
+    # Allow exit with status 1 on failure
+    # Ref: https://github.com/erikhuda/thor/issues/244#issue-6116190
+    def exit_on_failure?
+      true
+    end
+  end
+end
+
+CLI.start(ARGV)