# -*- encoding : utf-8 -*-
class Card; module Set; module All; module Actions; extend Card::Set # ~~~~~~~~~~~ above autogenerated; below pulled from /Users/ethan/dev/wagn/gem/card/mod/01_history/set/all/actions.rb ~~~~~~~~~~~
# -*- encoding : utf-8 -*-

def select_action_by_params params
  if (action = find_action_by_params(params))
    run_callbacks :select_action do
      self.selected_action_id = action.id
    end
  end
end

def find_action_by_params args
  if args[:rev]
    nth_action args[:rev]
  elsif Integer === args[:rev_id] || args[:rev_id] =~ /^\d+$/
    if action = Action.fetch(args[:rev_id]) and action.card_id == id
      action
    end
  elsif args[:rev_id]  # revision id is probalby a mod (e.g. if you request files/:logo/05_standard.png)
    last_action
  end
end

def nth_action index
  index = index.to_i
  if id and index > 0
    Action.where("draft is not true AND card_id = #{id}").order(:id).limit(1).offset(index-1).first
  end
end

def revision action
  # a "revision" refers to the state of all tracked fields at the time of a given action
  if action.is_a? Integer
    action = Card::Action.fetch(action)
  end
  action and Card::TRACKED_FIELDS.inject({}) do |attr_changes, field|
    last_change = action.card_changes.find_by_field_name(field) || last_change_on(field, not_after: action)
    attr_changes[field.to_sym] = (last_change ? last_change.value : self[field])
    attr_changes
  end
end

def delete_old_actions
  Card::TRACKED_FIELDS.each do |field|
    # assign previous changes on each tracked field to the last action
    if (la = last_action) && !la.change_for(field).present? and (last_change = last_change_on(field))
      last_change = Card::Change.find(last_change.id)   # last_change comes as readonly record
      last_change.update_attributes!(card_action_id: last_action_id)
    end
  end
  actions.where('id != ?', last_action_id ).delete_all
end



# ~~~~~~~~~~~ below autogenerated; above pulled from /Users/ethan/dev/wagn/gem/card/mod/01_history/set/all/actions.rb ~~~~~~~~~~~
end;end;end;end;