1class Progress
 2  attr_reader :exercise, :workout
 3
 4  def initialize(workout, exercise)
 5    @exercise = exercise
 6    @workout = workout
 7  end
 8
 9  def to_sets
10    @sets ||= sets.pluck(:actual_repetitions).compact
11  end
12
13  def max_weight
14    sets.maximum(:target_weight)
15  end
16
17  def sets
18    workout.sets.work.for(exercise).in_order
19  end
20
21  def status
22    "#{to_sets.join('/')} @ #{max_weight} lbs" if to_sets.any?
23  end
24end