Module: ActsAsTaggableOn::Taggable::Ownership

Defined in:
lib/acts_as_taggable_on/acts_as_taggable_on/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/acts_as_taggable_on/ownership.rb', line 3

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/acts_as_taggable_on/ownership.rb', line 48

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/acts_as_taggable_on/ownership.rb', line 53

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_on(owner, context) ⇒ Object 



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# File 'lib/acts_as_taggable_on/acts_as_taggable_on/ownership.rb', line 30

def owner_tags_on(owner, context)
  if owner.nil?
    scope = base_tags.where([%(#{ActsAsTaggableOn::Tagging.table_name}.context = ?), context.to_s])
  else
    scope = base_tags.where([%(#{ActsAsTaggableOn::Tagging.table_name}.context = ? AND
                                #{ActsAsTaggableOn::Tagging.table_name}.tagger_id = ? AND
                                #{ActsAsTaggableOn::Tagging.table_name}.tagger_type = ?), context.to_s, owner.id, 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

#reload(*args) ⇒ Object 



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

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/acts_as_taggable_on/ownership.rb', line 77

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 = ActsAsTaggableOn::Tag.find_or_create_all_with_like_by_name(tag_list.uniq)

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

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

        shared_tags = owned_tags & tags

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

          # 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 { |t| new_tags.find { |n| n.name.downcase == t.name.downcase } }.compact
        end
      else
        # Delete discarded tags and create new tags
        old_tags = owned_tags - tags
        new_tags = tags - owned_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?
        old_taggings = 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)
      end

      # Destroy old taggings:
      if old_taggings.present?
        ActsAsTaggableOn::Tagging.destroy_all(:id => old_taggings.map(&:id))
      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/acts_as_taggable_on/ownership.rb', line 61

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

  cache = cached_owned_tag_list_on(context)

  cache[owner] = ActsAsTaggableOn::TagList.from(new_list)
end