Module: ActsAsTaggableOn::Taggable::Ownership

Defined in:
lib/acts_as_taggable_on/taggable/ownership.rb

Defined Under Namespace

Modules: ClassMethods

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/acts_as_taggable_on/taggable/ownership.rb', line 6

def self.included(base)
  base.extend ActsAsTaggableOn::Taggable::Ownership::ClassMethods

  base.class_eval do
    after_save :save_owned_tags
  end

  base.initialize_acts_as_taggable_on_ownership
end

Instance Method Details

#cached_owned_tag_list_on(context) ⇒ Object 



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# File 'lib/acts_as_taggable_on/taggable/ownership.rb', line 62

def cached_owned_tag_list_on(context)
  variable_name = "@owned_#{context}_list"
  (instance_variable_defined?(variable_name) && instance_variable_get(variable_name)) || instance_variable_set(
    variable_name, {}
  )
end

#owner_tag_list_on(owner, context) ⇒ Object 



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# File 'lib/acts_as_taggable_on/taggable/ownership.rb', line 69

def owner_tag_list_on(owner, context)
  add_custom_context(context)

  cache = cached_owned_tag_list_on(context)

  cache[owner] ||= ActsAsTaggableOn::TagList.new(*owner_tags_on(owner, context).map(&:name))
end

#owner_tags(owner) ⇒ Object 



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# File 'lib/acts_as_taggable_on/taggable/ownership.rb', line 33

def owner_tags(owner)
  scope = if owner.nil?
            base_tags
          else
            base_tags.where(
              ActsAsTaggableOn::Tagging.table_name.to_s => {
                tagger_id: owner.id,
                tagger_type: owner.class.base_class.to_s
              }
            )
          end

  # when preserving tag order, return tags in created order
  # if we added the order to the association this would always apply
  if self.class.preserve_tag_order?
    scope.order("#{ActsAsTaggableOn::Tagging.table_name}.id")
  else
    scope
  end
end

#owner_tags_on(owner, context) ⇒ Object 



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# File 'lib/acts_as_taggable_on/taggable/ownership.rb', line 54

def owner_tags_on(owner, context)
  owner_tags(owner).where(
    ActsAsTaggableOn::Tagging.table_name.to_s => {
      context: context
    }
  )
end

#reload(*args) ⇒ Object 



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# File 'lib/acts_as_taggable_on/taggable/ownership.rb', line 85

def reload(*args)
  self.class.tag_types.each do |context|
    instance_variable_set("@owned_#{context}_list", nil)
  end

  super(*args)
end

#save_owned_tags ⇒ Object 



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# File 'lib/acts_as_taggable_on/taggable/ownership.rb', line 93

def save_owned_tags
  tagging_contexts.each do |context|
    cached_owned_tag_list_on(context).each do |owner, tag_list|
      # Find existing tags or create non-existing tags:
      tags = find_or_create_tags_from_list_with_context(tag_list.uniq, context)

      # Tag objects for owned tags
      owned_tags = owner_tags_on(owner, context).to_a

      # Tag maintenance based on whether preserving the created order of tags
      old_tags = owned_tags - tags
      new_tags = tags - owned_tags
      if self.class.preserve_tag_order?

        shared_tags = owned_tags & tags

        if shared_tags.any? && tags[0...shared_tags.size] != shared_tags
          index = shared_tags.each_with_index do |_, i|
            break i unless shared_tags[i] == tags[i]
          end

          # Update arrays of tag objects
          old_tags |= owned_tags.from(index)
          new_tags |= owned_tags.from(index) & shared_tags

          # Order the array of tag objects to match the tag list
          new_tags = tags.map do |t|
            new_tags.find do |n|
              n.name.downcase == t.name.downcase
            end
          end.compact
        end
      else
        # Delete discarded tags and create new tags
      end

      # Find all taggings that belong to the taggable (self), are owned by the owner,
      # have the correct context, and are removed from the list.
      if old_tags.present?
        ActsAsTaggableOn::Tagging.where(taggable_id: id, taggable_type: self.class.base_class.to_s,
                                        tagger_type: owner.class.base_class.to_s, tagger_id: owner.id,
                                        tag_id: old_tags, context: context).destroy_all
      end

      # Create new taggings:
      new_tags.each do |tag|
        taggings.create!(tag_id: tag.id, context: context.to_s, tagger: owner, taggable: self)
      end
    end
  end

  true
end

#set_owner_tag_list_on(owner, context, new_list) ⇒ Object 



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# File 'lib/acts_as_taggable_on/taggable/ownership.rb', line 77

def set_owner_tag_list_on(owner, context, new_list)
  add_custom_context(context)

  cache = cached_owned_tag_list_on(context)

  cache[owner] = ActsAsTaggableOn.default_parser.new(new_list).parse
end