18F/dolores-landingham-slack-bot

class Employee < ActiveRecord::Base
  acts_as_paranoid

  has_many :sent_messages, dependent: :destroy

  validates :slack_username, presence: true
  validates_uniqueness_of :slack_username, conditions: -> { where(deleted_at: nil) }
  validates(
    :slack_username,
    format: {
      with: /\A[a-z_0-9.-]+\z/,
      message: I18n.t('employees.errors.slack_username_format'),
    },
  )

  validates :started_on, presence: true
  validates :time_zone, presence: true

  def self.filter(params)
    results = self.all.where("slack_username like ?", "%#{params[:slack_username]}%")
    if params[:started_on].present?
      results.where(started_on: params[:started_on])
    end
    results
  end

  def validate_slack_username_in_org
    if !employee_finder.existing_employee?
      errors.add(
        :slack_username,
        I18n.t(
          'employees.errors.slack_username_in_org',
          slack_username: slack_username,
        ),
      )
    end
  end

  def add_slack_user_id_to_employee
    user_id = employee_finder.slack_user_id
    if user_id.present?
      self.slack_user_id = user_id
    end
  end

  def employee_finder
    @_employee_finder ||= EmployeeFinder.new(slack_username)
  end
end