#! /usr/bin/env ruby

FINGER_DIR = "#{ENV["HOME"]}/extra-stuff/fingers/"

# strip newlines, but not indent
def file_strip(str)
  # .slice! removes match from the start
  s = str.rstrip
  s.slice! /\n+/
  s
end

#########
# LOCAL #
#########

def gather_users_local
  Dir.children "/home/"
end


def gather_finger_local(user)
  project_path = "/home/#{user}/.project"
  plan_path    = "/home/#{user}/.plan"

  project_readable = File.readable? project_path
  plan_readable    = File.readable? plan_path

  return "" unless project_readable or plan_readable

  data = "### #{user}\n```\n"
  if project_readable
    data += "Project:\n"
    data += file_strip(File.read project_path) + "\n"
    data += "\n" if plan_readable
  end

  if plan_readable
    data += "Plan:\n"
    data += file_strip(File.read plan_path) + "\n"
  end

  data + "```\n"
end

#########
# GREEN #
#########

def gather_users_green
  # scrape users from the website
  # this are only users with a website, but I would guess most users using
  # finger also have at least something in their website
  site = `curl https://tilde.green/ 2>/dev/null`
  site.scan(/\/~[\w\d_-]+\//).map {|i| i[2..-2]}
end


def gather_finger_green(user)
  entry = `finger #{user}@tilde.green`
  # catch errors
  return "" if entry.empty?
  # filter out empty users
  return "" if entry.match? "Project: No Project.\nPlan: No Plan."

  # tilde.green puts 'Hello 0.0.0.0,' before the actual files
  # This includes empty plans and projects, but I'm not sure what engine is
  # being used and if there even have to be plan and project sections
  "### #{user}\n```\n#{entry.split("Hello 0.0.0.0,\n\n")[1].strip}\n```\n"
end

###########################
# TIE EVERYTHING TOGETHER #
###########################

def gen_stuff(collections)
  collections.each { |col|
    contents = col["gather_users"].call.map{|i| col["gather_finger"].call i}.join
    File.write FINGER_DIR + col["file_name"], contents
  }
end


gen_stuff [
  {
    "file_name"     => "ctrl-c",
    "gather_users"  => method(:gather_users_local),
    "gather_finger" => method(:gather_finger_local),
  },
  {
    "file_name"     => "tilde.green",
    "gather_users"  => method(:gather_users_green),
    "gather_finger" => method(:gather_finger_green),
  },
]