# == Schema Information
#
# Table name: issues
#
#  id           :integer          not null, primary key
#  title        :string(255)
#  assignee_id  :integer
#  author_id    :integer
#  project_id   :integer
#  created_at   :datetime         not null
#  updated_at   :datetime         not null
#  position     :integer          default(0)
#  branch_name  :string(255)
#  description  :text
#  milestone_id :integer
#  state        :string(255)
#  iid          :integer
#

class Issue < ActiveRecord::Base
  include Issuable
  include InternalId

  ActsAsTaggableOn.strict_case_match = true

  belongs_to :project
  validates :project, presence: true

  scope :of_group, ->(group) { where(project_id: group.project_ids) }
  scope :of_user_team, ->(team) { where(project_id: team.project_ids, assignee_id: team.member_ids) }

  attr_accessible :title, :assignee_id, :position, :description,
                  :milestone_id, :label_list, :author_id_of_changes,
                  :state_event

  acts_as_taggable_on :labels

  scope :cared, ->(user) { where(assignee_id: user) }
  scope :open_for, ->(user) { opened.assigned_to(user) }

  state_machine :state, initial: :opened do
    event :close do
      transition [:reopened, :opened] => :closed
    end

    event :reopen do
      transition closed: :reopened
    end

    state :opened
    state :reopened
    state :closed
  end

  # Mentionable overrides.

  def gfm_reference
    "issue ##{iid}"
  end

  # Reset issue events cache
  #
  # Since we do cache @event we need to reset cache in special cases:
  # * when an issue is updated
  # Events cache stored like  events/23-20130109142513.
  # The cache key includes updated_at timestamp.
  # Thus it will automatically generate a new fragment
  # when the event is updated because the key changes.
  def reset_events_cache
    Event.where(target_id: self.id, target_type: 'Issue').
      order('id DESC').limit(100).
      update_all(updated_at: Time.now)
  end
end