# frozen_string_literal: true

class ResourceMilestoneEvent < ResourceEvent
  include IgnorableColumns

  belongs_to :issue
  belongs_to :merge_request
  belongs_to :milestone

  scope :by_issue, ->(issue) { where(issue_id: issue.id) }
  scope :by_merge_request, ->(merge_request) { where(merge_request_id: merge_request.id) }

  validate :exactly_one_issuable

  enum action: {
    add: 1,
    remove: 2
  }

  # state is used for issue and merge request states.
  enum state: Issue.available_states.merge(MergeRequest.available_states)

  ignore_columns %i[reference reference_html cached_markdown_version], remove_with: '13.1', remove_after: '2020-06-22'

  def self.issuable_attrs
    %i(issue merge_request).freeze
  end
end