Module: ActsAsTaggableOn::Taggable::Ownership::InstanceMethods

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

Instance Method Summary collapse

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 46

def cached_owned_tag_list_on(context)
  variable_name = "@owned_#{context}_list"
  cache = 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 51

def owner_tag_list_on(owner, context)
  add_custom_context(context)

  cache = cached_owned_tag_list_on(context)
  cache.delete_if { |key, value| key.id == owner.id && key.class == owner.class }
  
  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 32

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
  scope = scope.order("#{ActsAsTaggableOn::Tagging.table_name}.id") if self.class.preserve_tag_order?
  scope.all
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?
        # First off order the array of tag objects to match the tag list
        # rather than existing tags followed by new tags
        tags = tag_list.uniq.map{|s| tags.detect{|t| t.name.downcase == s.downcase}}
        # To preserve tags in the order in which they were added
        # delete all owned tags and create new tags if the content or order has changed
        old_tags = (tags == owned_tags ? [] : owned_tags)
        new_tags = (tags == owned_tags ? [] : tags)
      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).all
      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 60

def set_owner_tag_list_on(owner, context, new_list)
  add_custom_context(context)
  
  cache = cached_owned_tag_list_on(context)
  cache.delete_if { |key, value| key.id == owner.id && key.class == owner.class }

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