Method: Markdoc::Sequence::Parser#parse

Defined in:
lib/markdoc/sequence.rb

#parse ⇒ Object 



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# File 'lib/markdoc/sequence.rb', line 105

def parse
  source.split("\n").each do |line|
    next if line.strip.empty?
    if match = line.match(/^([a-zA-Z0-9_ \t]+) *= *([a-zA-Z0-9_ \t]+)/)
      if match[2] =~ /Actor/
        roles << Role.new(:actor, match[1].strip, match[1].strip)
      else
        roles << Role.new(:object, match[1].strip, match[2].strip)
      end
    elsif match = line.match(/^([a-zA-Z0-9_ \t]+) *([<\-~>]{2}) *([a-zA-Z0-9_ \t]+):([^#]+)#?(.*)/)
      role1, role2, op = find(match[1]), find(match[3]), match[2]

      if op.index('>')
        source, dest = role1, role2
      elsif op.index('<')
        source, dest = role2, role1
      else
        raise "Message direction must be one of ->, ~>, <-, <~"
      end

      if op.index('-')
        type = :message
      elsif op.index('~')
        type = :rmessage
      else
        raise "Message direction must be one of ->, ~>, <-, <~"
      end

      message = Message.new(type, source, dest, match[4], match[5])
      # deactivate prev messages roles
      if last = messages.last
        (last.roles - message.roles).each do |role|
          output << role.deactivate if role.active
        end
      end
      # activate source before send message
      output << source.activate unless source.active
      output << message.deliver
      output << message.describe
      # activate dest
      output << dest.activate unless dest.active
      messages << message
    elsif match = line.match(/^([a-zA-Z0-9_ \t]+) *:([^#]+)#?(.*)/)
      role = find(match[1])
      message = Message.new(:message, role, role, match[2], match[3])
      # deactivate prev messages roles
      if last = messages.last
        (last.roles - message.roles).each do |role|
          output << role.deactivate if role.active
        end
      end
      # activate role before send message
      output << role.activate unless role.active
      output << message.deliver
      output << message.describe
      messages << message
    end
  end

  header
  footer

  output.compact.join("\n")
end