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path: root/app/models/gcp/cluster.rb
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module Gcp
  class Cluster < ActiveRecord::Base
    extend Gitlab::Gcp::Model

    belongs_to :project, inverse_of: :cluster
    belongs_to :user
    belongs_to :service

    attr_encrypted :password,
      mode: :per_attribute_iv,
      key: Gitlab::Application.secrets.db_key_base,
      algorithm: 'aes-256-cbc'

    attr_encrypted :kubernetes_token,
      mode: :per_attribute_iv,
      key: Gitlab::Application.secrets.db_key_base,
      algorithm: 'aes-256-cbc'

    attr_encrypted :gcp_token,
      mode: :per_attribute_iv,
      key: Gitlab::Application.secrets.db_key_base,
      algorithm: 'aes-256-cbc'

    enum status: {
      scheduled: 1,
      creating: 2,
      created: 3,
      errored: 4
    }

    state_machine :status, initial: :scheduled do
      event :creating do
        transition any - [:creating] => :creating
      end

      event :created do
        transition any - [:created] => :created
      end

      event :errored do
        transition any - [:errored] => :errored
      end

      before_transition any => [:errored, :created] do |cluster|
        cluster.gcp_token = nil
        cluster.gcp_operation_id = nil
      end

      before_transition any => [:errored] do |cluster|
        status_reason = transition.args.first
        cluster.status_reason = status_reason
      end
    end

    validates :gcp_project_id, presence: true
    validates :gcp_cluster_zone, presence: true
    validates :gcp_cluster_name, presence: true
    validates :gcp_cluster_size, presence: true,
              numericality: { only_integer: true, greater_than: 0 }

    validates :project_namespace,
      allow_blank: true,
      length: 1..63,
      format: {
        with: Gitlab::Regex.kubernetes_namespace_regex,
        message: Gitlab::Regex.kubernetes_namespace_regex_message
      }

    # if we do not do status transition we prevent change
    validate :restrict_modification, on: :update, unless: :status_changed?

    def on_creation?
      scheduled? || creating?
    end

    def api_url
      'https://' + endpoint
    end

    def restrict_modification
      if on_creation?
        errors.add(:base, "cannot modify during creation")
        return false
      end

      true
    end

    def destroy
      super if restrict_modification
    end
  end
end