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require 'erb'

template = %q{
  BEGIN:VCALENDAR
  VERSION:2.0
  X-WR-CALNAME:DHAP Digital Meeting Maker
  X-WR-TIMEZONE:US/Pacific
  CALSCALE:GREGORIAN
  METHOD:PUBLISH
  <% @events.each do |event| %>
  BEGIN:VEVENT
  DTSTART:<%= event[:start].strftime( @time_format) %>
  DTEND:<%= event[:end].strftime( @time_format) %>
  SUMMARY:<%= event[:desc] %>
  UID:DDAA<%= event[:start].strftime('%Y-%m%d-%H%M-%S') %><%= event[:end].strftime('%S-%M%H-%d%m%Y') %>
  END:VEVENT
  <% end %>
  END:VCALENDAR
}.gsub(/^  /, '')

@events = []
@time_format = '%Y%m%dT%H%M%S'

message = ERB.new(template)
puts message.result