module Idonethis::Adapters
  module Git
    class << self
      def commits(opts={})
        require 'git'

        fail "opts is supposed to be a hash" unless opts.is_a?(Hash)
        
        dir, since, how_many, log = defaults.merge(opts).values_at(:dir, :since, :how_many, :log)

        since_when = since.strftime("%d-%b-%Y")

        since_when = '1am' if since == Date.today
        since_when = '1am yesterday' if since == (Date.today - 1)

        log.call("Using <#{since_when}> as the since date for git")
        
        ::Git.open(dir).log(how_many).since("1am #{since_when}")
      end

      def repo?(dir)
        File.exists?(File.join(dir, ".git"))
      end

      private

      def defaults
        { log: ->(msg) {}, how_many: 1000 }
      end
    end
  end
end