devlog

#!/usr/bin/env ruby

FILENAME = "#{Dir.home}/Dropbox/devlog.org"

def fail_loudly
  STDERR.puts "current_date is null"
  exit 1
end

def main
  dates = {}
  current_date = nil
  File.open(FILENAME).each_line { |line|
    if /^\* (?<date>\d{4}-\d{2}-\d{2})/ =~ line
      current_date = date
    else
      fail_loudly if current_date == nil
      dates[current_date] ||= []
      dates[current_date] << line
    end
  }
  return dates
end

def output(dates)
  file = File.open(FILENAME, 'w+')
  dates.keys.sort.reverse.each { |date|
    file.puts "* #{date}"
    dates[date].each { |line|
      file.puts line
    }
  }
end

def todays_date
  year = Time.now.year
  month = Time.now.month.to_s.rjust(2, "0")
  day = Time.now.day.to_s.rjust(2, "0")
  "#{year}-#{month}-#{day}"
end

begin
  dates = main

  dates[todays_date] ||= []
  notes = "\n#{ARGV.first}"
  dates[todays_date].push(notes)

  output(dates)
rescue Errno::EPIPE
  exit 0
end