Module: Lokap::Trackable::Base

Includes:
TableUtilities
Defined in:
lib/lokap/trackable/base.rb

Instance Method Summary collapse

Methods included from TableUtilities

#trackable_class_name, #trackable_method?, #trackable_table_name

Instance Method Details

#build_trackable(name, options = {}) ⇒ Object 



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# File 'lib/lokap/trackable/base.rb', line 16

def build_trackable(name, options={})
  repeatable = options.fetch(:repeatable, false)
  class_name = trackable_class_name(options[:class_name])
  event      = options[:event] || name
  table_name = trackable_table_name(options[:class_name])

  instance_eval do
    has_many :activities, class_name: class_name, as: :reference, dependent: :destroy

    define_method(:activity?) do |event|
      activities.where(event: event).first
    end

    define_method(:activity_by?) do |event, actor=Thread.current[:current_user] |
      activities.where(actor: actor, event: event).first
    end
  end

  verb = name.to_s.split('_').first
  past_tense_verb = verb.to_s.verb.conjugate(tense: :past, aspect: :perfective)
  past_tense = [past_tense_verb, name.to_s.split('_')[1..-1]].flatten.join('_')

  scope past_tense, -> { joins(:activities).where(["event = ?", event]) }

  # Clean up this mess.
  scope "un#{past_tense}", -> {
    joins("LEFT OUTER JOIN #{table_name} " <<
      "ON #{table_name}.reference_id = #{arel_table.name}.id " <<
      "AND #{table_name}.event = '#{event}'")
      .where("#{table_name}.event" => nil) }

  define_method("#{past_tense}?") do
    !!activity?(event)
  end

  define_method("un#{past_tense}?") do
    !activity?(event)
  end

  define_method("#{name}!") do |actor=Thread.current[:current_user], data=nil|
    activity = activities.find_or_create_by(actor: actor, event: event, data: data)
    activity.touch and return activity
  end

  define_method("un#{name}!") do |data=nil|
    activities.where(event: event)&.destroy_all
  end

  # Not necessary at the moment
  #
  # define_method("#{name.to_s}!") do |actor, data={}|
  #   return if repeatable && activity_by?(actor, name, event, table_name)
  #   send(table_name.to_sym).create(
  #     actor_id: actor.id, actor_type: actor.class.to_s, event: event, data: data)
  # end
  #
  # define_method("un#{name.to_s}!") do |actor|
  #   return unless activity_by?(actor, name, event, table_name)
  #   send(table_name.to_sym).where(
  #     actor_id: actor.id, actor_type: actor.class, event: event).first.destroy
  # end
end

#trackable(subject, options = {}) ⇒ Object 



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# File 'lib/lokap/trackable/base.rb', line 12

def trackable(subject, options={})
  build_trackable(subject, options)
end