Class: Card::Action

Inherits:
ApplicationRecord show all
Extended by:
Admin
Includes:
Differ
Defined in:
mod/history/lib/card/action.rb,
mod/history/lib/card/action/admin.rb,
mod/history/lib/card/action/differ.rb,
mod/history/lib/card/action/action_renderer.rb

Overview

An action is a group of changes to a single card that is recorded during an act. Together, acts, actions, and changes comprise a comprehensive card history tracking system.

For example, if a given web submission changes both the name and type of a given card, that would be recorded as one action with two changes. If there are multiple cards changed, each card would have its own action, but the whole submission would still comprise just one single act.

An Action records:

  • the card_id of the card acted upon
  • the card_act_id of the act of which the action is part
  • the action_type (create, update, or delete)
  • a boolean indicated whether the action is a draft
  • a comment (where applicable)

Defined Under Namespace

Modules: Admin, Differ Classes: ActionRenderer

Constant Summary collapse

TYPE_OPTIONS =

these are the three possible values for action_type

%i[create update delete].freeze

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Admin

delete_cardless, delete_changeless, delete_old, make_current_state_the_initial_state

Methods included from Differ

#cardtype_diff, #content_diff, #green?, #name_diff, #raw_view, #red?, #summary_diff_omits_content?

Class Method Details

.cache ⇒ Card::Cache

cache object for actions

Returns:



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# File 'mod/history/lib/card/action.rb', line 56

def cache
  Card::Cache[Action]
end

.fetch(id) ⇒ Action?

retrieve action from cache if available

Parameters:

Returns:



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# File 'mod/history/lib/card/action.rb', line 48

def fetch id
  cache.fetch id.to_s do
    find id.to_i
  end
end

Instance Method Details

#action_type ⇒ Symbol

retrieve action_type (create, update, or delete)

Returns:

  • (Symbol) 


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# File 'mod/history/lib/card/action.rb', line 83

def action_type
  return :draft if draft
  TYPE_OPTIONS[read_attribute(:action_type)]
end

#action_type=(value) ⇒ Integer

assign action_type (create, update, or delete)

Parameters:

  • value (Symbol)

Returns:

  • (Integer) 


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# File 'mod/history/lib/card/action.rb', line 77

def action_type= value
  write_attribute :action_type, TYPE_OPTIONS.index(value)
end

#card ⇒ Card

each action is associated with on and only one card

Returns:



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# File 'mod/history/lib/card/action.rb', line 63

def card
  res = Card.fetch card_id, look_in_trash: true, skip_modules: true
  return res unless res && res.type_id.in?([FileID, ImageID])
  res.include_set_modules
end

#change(field) ⇒ Change

action's Change object for given field

Returns:

See Also:



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# File 'mod/history/lib/card/action.rb', line 112

def change field
  changes[interpret_field field]
end

#changed_values ⇒ Object

all action in hash form. { field1: new_value }



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# File 'mod/history/lib/card/action.rb', line 144

def changed_values
  @changed_values ||= changes.each_with_object({}) do |(key,change), h|
    h[key] = change.value
  end
end

#changes ⇒ Hash

all action changes in hash form. { field1: Change1 }

Returns:

  • (Hash) 


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# File 'mod/history/lib/card/action.rb', line 132

def changes
  @changes ||=
    if sole?
      current_changes
    else
      card_changes.each_with_object({}) do |change, hash|
        hash[change.field.to_sym] = change
      end
    end
end

#current_changes ⇒ Hash

Returns:

  • (Hash) 


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# File 'mod/history/lib/card/action.rb', line 151

def current_changes
  return {} unless card
  @current_changes ||=
    Card::Change::TRACKED_FIELDS.each_with_object({}) do |field, hash|
      hash[field.to_sym] = Card::Change.new field: field,
                                            value: card.send(field),
                                            card_action_id: id
    end
end

#expire ⇒ Object

remove action from action cache



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# File 'mod/history/lib/card/action.rb', line 70

def expire
  self.class.cache.delete id.to_s
end

#interpret_field(field) ⇒ Symbol

translate field into fieldname as referred to in database

Parameters:

  • field (Symbol) —

    can be :type_id, :cardtype, :db_content, :content, :name, :trash

Returns:

  • (Symbol)

See Also:



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# File 'mod/history/lib/card/action.rb', line 184

def interpret_field field
  case field
  when :content then :db_content
  when :cardtype then :type_id
  else field.to_sym
  end
end

#interpret_value(field, value) ⇒ Integer, ...

value in form prescribed for specific field name

Parameters:

Returns:

  • (Integer) —

    for :type_id

  • (String) —

    for :name, :db_content, :content, :cardtype

  • (True/False) —

    for :trash



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# File 'mod/history/lib/card/action.rb', line 197

def interpret_value field, value
  case field.to_sym
  when :type_id
    value && value.to_i
  when :cardtype
    type_card = value && Card.quick_fetch(value.to_i)
    type_card && type_card.name.capitalize
  else value
  end
end

#new_content? ⇒ true/false

does action change card's content?

Returns:

  • (true/false) 


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# File 'mod/history/lib/card/action.rb', line 169

def new_content?
  !value(:db_content).nil?
end

#new_name? ⇒ true/false

does action change card's name?

Returns:

  • (true/false) 


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# File 'mod/history/lib/card/action.rb', line 175

def new_name?
  !value(:name).nil?
end

#new_type? ⇒ true/false

does action change card's type?

Returns:

  • (true/false) 


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# File 'mod/history/lib/card/action.rb', line 163

def new_type?
  !value(:type_id).nil?
end

#previous_action ⇒ Object 



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# File 'mod/history/lib/card/action.rb', line 88

def previous_action
  Card::Action.where("id < ? AND card_id = ?", id, card_id).last
end

#previous_change(field) ⇒ Change

most recent change to given field before this one

Returns:

See Also:



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# File 'mod/history/lib/card/action.rb', line 119

def previous_change field
  return nil if action_type == :create
  field = interpret_field field
  if @previous_changes && @previous_changes.key?(field)
    @previous_changes[field]
  else
    @previous_changes ||= {}
    @previous_changes[field] = card.last_change_on field, before: self
  end
end

#previous_value(field) ⇒ Object

value of field set by most recent Change before this one

See Also:



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# File 'mod/history/lib/card/action.rb', line 103

def previous_value field
  return if action_type == :create
  return unless (previous_change = previous_change field)
  interpret_value field, previous_change.value
end

#sole? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'mod/history/lib/card/action.rb', line 208

def sole?
  card_changes.empty? &&
    (action_type == :create || Card::Action.where(card_id: card_id).count == 1)
end

#value(field) ⇒ Object

value set by action's Change to given field

See Also:



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# File 'mod/history/lib/card/action.rb', line 95

def value field
  return unless (change = change field)
  interpret_value field, change.value
end