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  | 
class Import < ActiveRecord::Base
  mount_uploader :file, ImportUploader
  belongs_to :workbench
  belongs_to :referential
  belongs_to :parent, polymorphic: true
  has_many :messages, class_name: "ImportMessage", dependent: :destroy
  has_many :resources, class_name: "ImportResource", dependent: :destroy
  has_many :children, foreign_key: :parent_id, class_name: "Import", dependent: :destroy
  scope :started_on_date, ->(date) { where('started_at BETWEEN ? AND ?', date.beginning_of_day, date.end_of_day) }
  extend Enumerize
  enumerize :status, in: %i(new pending successful warning failed running aborted canceled), scope: true, default: :new
  validates :file, presence: true
  validates_presence_of :workbench, :creator
  before_create :initialize_fields
  def self.ransackable_scopes(auth_object = nil)
    [:started_on_date]
  end
  def self.model_name
    ActiveModel::Name.new Import, Import, "Import"
  end
  def children_succeedeed
    children.with_status(:successful).count
  end
  def self.failing_statuses
    symbols_with_indifferent_access(%i(failed aborted canceled))
  end
  def self.finished_statuses
    symbols_with_indifferent_access(%i(successful failed aborted canceled))
  end
  def notify_parent
    parent.child_change
    update(notified_parent_at: DateTime.now)
  end
  def child_change
    return if self.class.finished_statuses.include?(status)
    update_status
    update_referentials
  end
  def update_status
    status_count = children.group(:status).count
    children_finished_count = children_failed_count = children_count = 0
    status_count.each do |status, count|
      if self.class.failing_statuses.include?(status)
        children_failed_count += count
      end
      if self.class.finished_statuses.include?(status)
        children_finished_count += count
      end
      children_count += count
    end
    attributes = {
      current_step: children_finished_count
    }
    status =
      if children_failed_count > 0
        'failed'
      elsif status_count['successful'] == children_count
        'successful'
      end
    if self.class.finished_statuses.include?(status)
      attributes[:ended_at] = Time.now
    end
    update attributes.merge(status: status)
  end
  def update_referentials
    return unless self.class.finished_statuses.include?(status)
    children.each do |import|
      import.referential.update(ready: true) if import.referential
    end
  end
  private
  def initialize_fields
    self.token_download = SecureRandom.urlsafe_base64
  end
  def self.symbols_with_indifferent_access(array)
    array.flat_map { |symbol| [symbol, symbol.to_s] }
  end
end
  |