module Slather::CoverageService::GutterJsonOutput

def post
  output = { 'meta' => { 'timestamp' => DateTime.now.strftime('%Y-%m-%d %H:%M:%S.%6N') } }
  symbols = {}
  coverage_files.each do |coverage_file|
    next unless coverage_file.gcov_data
    filename = coverage_file.source_file_pathname.to_s
    filename = filename.sub(Pathname.pwd.to_s, '')[1..-1]
    coverage_file.cleaned_gcov_data.split("\n").each do |line|
      data = line.split(':')
      line_number = data[1].to_i
      next unless line_number > 0
      coverage = data[0].strip
      symbol = {  'line' => line_number,
                  'long_text' => '',
                  'short_text' => coverage }
      if coverage != '-'
        symbol['background_color'] = coverage.to_i > 0 ? '0x35CC4B' : '0xFC635E'
      end
      if symbols.has_key?(filename)
        symbols[filename] << symbol
      else
        symbols[filename] = [ symbol ]
      end
    end
  end
  output['symbols_by_file'] = symbols
  File.open('.gutter.json', 'w') { |file| file.write(output.to_json) }
end