class LfsObject < ActiveRecord::Base
  has_many :lfs_objects_projects, dependent: :destroy # rubocop:disable Cop/ActiveRecordDependent
  has_many :projects, through: :lfs_objects_projects

  validates :oid, presence: true, uniqueness: true

  mount_uploader :file, LfsObjectUploader

  def project_allowed_access?(project)
    projects.exists?(project.lfs_storage_project.id)
  end

  def self.destroy_unreferenced
    joins("LEFT JOIN lfs_objects_projects ON lfs_objects_projects.lfs_object_id = #{table_name}.id")
        .where(lfs_objects_projects: { id: nil })
        .destroy_all
  end

  def self.calculate_oid(path)
    Digest::SHA256.file(path).hexdigest
  end
end