letter

#!/usr/bin/env ruby
# converts markdown letter to PDF
# TODO - rewrite as wrapper around markdown2pdf w/ custom template

require 'optparse'
require 'ostruct'
require 'erb'
require 'rubygems'
#require 'peg_markdown'
require 'pandoc-ruby'
require 'rtex'

# Set defaults
@options = OpenStruct.new
@options.fontsize = '11pt'
@options.margin = '1.3in'
@options.signature = ENV['HOME'] + '/Private/sig.pdf' 
@options.sign = true 
@options.template = nil
@options.latex = false


opts = OptionParser.new

opts.on('-h', '--help')       { puts opts }
opts.on('-f', '--fontsize FONTSIZE')   { |s| @options.fontsize = s }
opts.on('-m', '--margin MARGIN')     { |m| @options.margin = m }
opts.on('-s', '--signature SIGFILE')  { |s| @options.signature = s; @options.sign = true }
opts.on('-n', '--no-sign')      { @options.sign = false }
opts.on('-l', '--latex')        { @options.latex = true }

opts.parse!(ARGV)

infile = ARGV[0]
if (not infile) || infile.empty?
  puts "You must specify a file to convert."
  exit 1
end
basename = File.basename(infile,File.extname(infile))

salutations = /^(Dear .*[:,]|To whom it may concern:|Recommendation for (.*):|Letter of recommendation for (.*):)\s*$/

closings = /^((Sincerely|Yours|Best|Sincerely yours),)/

rawbody = File.open(infile).read
salmatch = rawbody.match(salutations)

salutation, saloffset, sallength =
  if salmatch
     [PandocRuby.new(salmatch[0]).to_latex(:smart), salmatch.begin(0), salmatch[0].length]
  else
     ["",0,0]
  end

address = if saloffset > 0
            PandocRuby.new(rawbody.slice!(0..(saloffset-1)).split("\n").join("  \n").strip).to_latex(:smart)
          else
            ""
          end
rawbody.slice!(0..(sallength-1))

closingmatch = rawbody.match(closings)
closing, closingoffset =
  if closingmatch
    [PandocRuby.new(closingmatch[0]).to_latex(:smart), closingmatch.begin(0)]
  else
    ["",0]
  end

endstuff = rawbody.slice!(closingoffset, rawbody.length - 1)

sign = @options.sign
sigfile = @options.signature

latexbody = PandocRuby.new(rawbody).to_latex(:smart)

defaulttemplate=<<EOF
\\documentclass[<%= @options.fontsize %>,letterpaper,oneside]{phil-letter}
\\usepackage[pdftex]{graphicx}
\\usepackage{pxfonts}
\\usepackage[mathletters]{ucs}
\\usepackage[utf8x]{inputenc}
\\usepackage[margin=<%= @options.margin %>]{geometry}
\\usepackage{enumerate}
\\usepackage{hyperref}
\\email{jgm@berkeley.edu\\vspace{5pt}}
\\sigspace=5pt
\\name{John MacFarlane\\\\
Professor of Philosophy}
\\setlength{\\parindent}{0pt}
\\setlength{\\parskip}{6pt plus 2pt minus 1pt}
\\begin{document}
\\begin{letter}{<%= address %>}
\\opening{<%= salutation %>}
<%= latexbody %>
\\closing{<%= closing %>
<% if sign %>\\\\ \\vspace{10pt}{\\scalebox{.55}{\\includegraphics{<%= sigfile %>}}}<% end %>
}
%\\encl{}
\\end{letter}
\\end{document}
EOF

template = if @options.template
              ERB.new(File.open(@options.template).read)
           else
              ERB.new(defaulttemplate)
           end

latexall = template.result

if @options.latex
  puts latexall
  exit 0
end

output = RTeX::Document.new(latexall).to_pdf

output = IO.popen("rubber-pipe --pdf --module graphicx", "w+") do |pipe|
  pipe.puts latexall
  pipe.close_write
  pipe.read
end


if $? == 0 
  File.open(basename + '.pdf', 'wb').write(output)
  puts "Created #{basename}.pdf"
  exit 0
else
  exit 1
end