Class: ChartHelpers::Parsers::Gantt

Inherits:
Object
  • Object
show all
Defined in:
lib/chart_helpers/parsers/gantt.rb

Constant Summary collapse

GANTT_LINE_REGEX =

This should match “title” :a1, 0.000, 0.001

%r{
  (?<title>.+)
  (?<group>:\w+)
  ,\s+(?<start>[[^,]+]+)
  ,\s+(?<end>[[^,]+]+)
}x

Class Method Summary collapse

Class Method Details

.parse(lines) ⇒ Object 



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# File 'lib/chart_helpers/parsers/gantt.rb', line 14

def self.parse(lines)
  title = 'Gantt Chart'
  date_format = nil
  number_format = nil
  data = []

  while line = lines.shift
    next if line.empty? || line.nil?
    line.strip!

    case line
    when /\Atitle/
      if title == 'Gantt Chart'
        # Line will be like:
        # `title THIS IS MY TITLE`
        # We would want "THIS IS MY TITLE"
        title = line.split(' ')[1..-1].join(' ')
      else
        data << parse_line(line)
      end
    when /\AdateFormat/
      # Line will be like:
      # `dateFormat s.SSS`
      # We would want "s.SSS"
      date_format = line.split(' ')[1..-1].join(' ')
    when /\AnumberFormat/
      # Line will be like:
      # `numberFormat s.SSS`
      # We would want "s.SSS"
      number_format = line.split(' ')[1..-1].join(' ')
    else
      data << parse_line(line, date: !date_format.nil?)
    end
  end

  [title, date_format, number_format, data]
end

.parse_line(line, date: false) ⇒ Object 



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# File 'lib/chart_helpers/parsers/gantt.rb', line 52

def self.parse_line(line, date: false)
  match_data = line.match(GANTT_LINE_REGEX)
  start_val, end_val = if date
    [DateTime.parse(match_data[:start]).to_time.to_f, DateTime.parse(match_data[:end]).to_time.to_f]
  else
    [match_data[:start].to_f, match_data[:end].to_f]
  end
  { title: CGI.escapeHTML(match_data[:title]).strip, start: start_val, end: end_val }
end