Prep for solving

Author: rab

.gitignore

@@ -1,3 +1,4 @@
+/.session
 *.gem
 *.rbc
 /.config

README.md

@@ -1,2 +1,17 @@
-# adventofcode2016
+# Advent of Code 2015 #
+
 Solutions for the 2016 edition of the Advent of Code - http://adventofcode.com/2016
+
+Back again for another year, the little [Advent of Code] site that has a new pair of problems to solve each new day (i.e., midnight Eastern time) and this repository holds my solutions using [ruby](http://ruby-lang.org)
+
+My solutions for the original 2015 installment of the Advent of Code is in the repo: [rab/adventofcode2015](https://github.com/rab/adventofcode2015)
+
+When I was recognized on the [Leaderboard]
+
+Day | Position
+--- | --------
+
+[Advent of Code]: http://www.adventofcode.com/2016/
+[Leaderboard]: http://www.adventofcode.com/leaderboard
+[Stats]: http://www.adventofcode.com/stats
+[Github]: http://github.com/

day_template.rb

@@ -0,0 +1,6 @@
+require_relative 'input'
+
+day = __FILE__[/\d+/].to_i(10)
+input = Input.for_day(day)
+
+puts "solving day #{day} from input\n#{input.inspect}"

input.rb

@@ -0,0 +1,20 @@
+require 'uri'
+require 'net/http'
+
+module Input
+  extend self
+  def for_day(day)
+    cache_file = 'day%02d_input.txt'%[day]
+    if File.exist? cache_file
+      File.read(cache_file)
+    else
+      uri = URI('http://adventofcode.com/2016/day/%s/input'%[day.to_s])
+      req = Net::HTTP::Get.new(uri)
+      req['Cookie'] = File.read('./.session') if File.exist?('./.session')
+      res = Net::HTTP.start(uri.hostname, uri.port) {|http|
+        http.request(req)
+      }
+      res.body.tap {|contents| File.write(cache_file, contents) }
+    end
+  end
+end