class Api::V1::DocumentsController < Api::V1::RestfulController

  def for_group
    self.collection = page_collection(for_group_documents).search_for(params[:q])
    cache = RecordCache.for_collection(collection, current_user, exclude_types)
    respond_with_collection scope: { group_id: @group.id, cache: cache }, serializer: DocumentSerializer
  end

  def for_discussion
    load_and_authorize(:discussion)
    self.collection = Queries::UnionQuery.for(:documents, [
      @discussion.documents,
      @discussion.poll_documents,
      @discussion.comment_documents
    ])
    respond_with_collection
  end

  private

  def for_group_documents
    if current_user.ability.can?(:see_private_content, load_and_authorize(:group))
      private_group_documents
    else
      public_group_documents
    end.order(created_at: :desc)
  end

  def private_group_documents
    group_ids = case params[:subgroups]
      when 'mine', 'all'
        @group.id_and_subgroup_ids
      else
        Array(@group.id)
      end
    Document.where(group_id: group_ids)
  end

  def public_group_documents
    Queries::UnionQuery.for(:documents, [
      @group.documents,
      @group.public_discussion_documents,
      @group.public_comment_documents ])

  end

  def accessible_records
    (
      load_and_authorize(:group, optional: true)      ||
      load_and_authorize(:discussion, optional: true) ||
      load_and_authorize(:comment, optional: true)    ||
      load_and_authorize(:poll, optional: true)       ||
      load_and_authorize(:outcome)
    ).documents
  end
end
