class Fusuma::Plugin::Parsers::LibinputGestureParser

def detect_gesture(event_name)
  event_name =~ /GESTURE_(SWIPE|PINCH)_(BEGIN|UPDATE|END)/
  [Regexp.last_match(1).downcase, Regexp.last_match(2).downcase]
end

def parse_delta(line)
  return if line.nil?
  move_x, move_y, unaccelerated_x, unaccelerated_y, _, zoom, _, rotate =
    line.tr('/|(|)', ' ').split
  Events::Records::GestureRecord::Delta.new(move_x.to_f, move_y.to_f,
                                            unaccelerated_x.to_f, unaccelerated_y.to_f,
                                            zoom.to_f, rotate.to_f)
end

def parse_libinput(line)
  _device, event_name, _time, other = line.strip.split(nil, 4)
  finger, other = other.split(nil, 2)
  delta = parse_delta(other)
  [*detect_gesture(event_name), finger, delta]
end

def parse_record(record)
  case line = record.to_s
  when /GESTURE_SWIPE|GESTURE_PINCH/
    gesture, status, finger, delta = parse_libinput(line)
  else
    return
  end
  Events::Records::GestureRecord.new(status: status,
                                     gesture: gesture,
                                     finger: finger,
                                     delta: delta)
end