.gitignore

*.ics
.DS_Store

generate_ics.rb

require 'date'
require 'securerandom'

def prompt(msg)
  puts "\n#{msg}"
  gets.chomp()
end

def pbcopy(input)
  str = input.to_s
  IO.popen('pbcopy', 'w') { |f| f << str }
  str
end

def get_data
  what = prompt("What:")
  where = prompt("Where:")

  month, day, year = prompt("Start Date (mm/dd/yyyy):").split(/[\/-]/).map(&:to_i)
  start = prompt("Start Time (HH[:]MM):").gsub(":", "").to_i
  hour = start / 100
  min = start % 100

  timezone = "-04:00"
  num_hours = prompt("Num hours:").to_f

  start_time = DateTime.new(year, month, day, hour, min, 0, timezone)
  end_time = start_time.dup + num_hours/24.0

  return what, where, start_time, end_time
end

def linebreak
  puts
  puts "--------------------------------"
  puts
end

def ics_escape(msg)
  msg.gsub(",", "\\,")
end

def ics_timestamp(time)
  time.new_offset(0).strftime("%Y%m%dT%H%M%SZ")
end

def create_ics(what, where, start_time, end_time)
  message = <<EOF
BEGIN:VCALENDAR
PRODID:-//Cyrus Stoller 0.0//EN
VERSION:2.0
METHOD:PUBLISH
CALSCALE:GREGORIAN
BEGIN:VEVENT
DTSTAMP:#{ics_timestamp DateTime.now}
DTSTART:#{ics_timestamp start_time}
DTEND:#{ics_timestamp end_time}
SUMMARY:#{ics_escape what}
UID:harvardpulse.com//#{SecureRandom.hex}
DESCRIPTION:
LOCATION:#{ics_escape where}
END:VEVENT
END:VCALENDAR
EOF

  File.open("output.ics", "w") { |file| file << message }
end

def make_markdown(what, where, start_time, end_time)
  message = <<EOF
**What:** #{what}
**Where:** #{where}
**When:** #{start_time.strftime("%A %B %-d, %Y")} from #{start_time.strftime("%l:%M%P")} - #{end_time.strftime("%l:%M%P")}
EOF

  puts pbcopy(message)
end

def main
  details = get_data()
  linebreak
  make_markdown(*details)
  create_ics(*details)
end

main if __FILE__ == $0