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# frozen_string_literal: true
module Operations
module FeatureFlags
class Strategy < ApplicationRecord
STRATEGY_DEFAULT = 'default'
STRATEGY_GITLABUSERLIST = 'gitlabUserList'
STRATEGY_GRADUALROLLOUTUSERID = 'gradualRolloutUserId'
STRATEGY_FLEXIBLEROLLOUT = 'flexibleRollout'
STRATEGY_USERWITHID = 'userWithId'
STRATEGIES = {
STRATEGY_DEFAULT => [].freeze,
STRATEGY_GITLABUSERLIST => [].freeze,
STRATEGY_GRADUALROLLOUTUSERID => %w[groupId percentage].freeze,
STRATEGY_FLEXIBLEROLLOUT => %w[groupId rollout stickiness].freeze,
STRATEGY_USERWITHID => ['userIds'].freeze
}.freeze
USERID_MAX_LENGTH = 256
STICKINESS_SETTINGS = %w[DEFAULT USERID SESSIONID RANDOM].freeze
self.table_name = 'operations_strategies'
belongs_to :feature_flag
has_many :scopes, class_name: 'Operations::FeatureFlags::Scope'
has_one :strategy_user_list
has_one :user_list, through: :strategy_user_list
validates :name,
inclusion: {
in: STRATEGIES.keys,
message: 'strategy name is invalid'
}
validate :parameters_validations, if: -> { errors[:name].blank? }
validates :user_list, presence: true, if: -> { name == STRATEGY_GITLABUSERLIST }
validates :user_list, absence: true, if: -> { name != STRATEGY_GITLABUSERLIST }
validate :same_project_validation, if: -> { user_list.present? }
accepts_nested_attributes_for :scopes, allow_destroy: true
def user_list_id=(user_list_id)
self.user_list = ::Operations::FeatureFlags::UserList.find(user_list_id)
end
private
def same_project_validation
unless user_list.project_id == feature_flag.project_id
errors.add(:user_list, 'must belong to the same project')
end
end
def parameters_validations
validate_parameters_type &&
validate_parameters_keys &&
validate_parameters_values
end
def validate_parameters_type
parameters.is_a?(Hash) || parameters_error('parameters are invalid')
end
def validate_parameters_keys
actual_keys = parameters.keys.sort
expected_keys = STRATEGIES[name].sort
expected_keys == actual_keys || parameters_error('parameters are invalid')
end
def validate_parameters_values
case name
when STRATEGY_GRADUALROLLOUTUSERID
gradual_rollout_user_id_parameters_validation
when STRATEGY_FLEXIBLEROLLOUT
flexible_rollout_parameters_validation
when STRATEGY_USERWITHID
FeatureFlagUserXidsValidator.validate_user_xids(self, :parameters, parameters['userIds'], 'userIds')
end
end
def within_range?(value, min, max)
return false unless value.is_a?(String)
return false unless value.match?(/\A\d+\z/)
value.to_i.between?(min, max)
end
def gradual_rollout_user_id_parameters_validation
percentage = parameters['percentage']
group_id = parameters['groupId']
unless within_range?(percentage, 0, 100)
parameters_error('percentage must be a string between 0 and 100 inclusive')
end
unless group_id.is_a?(String) && group_id.match(/\A[a-z]{1,32}\z/)
parameters_error('groupId parameter is invalid')
end
end
def flexible_rollout_parameters_validation
stickiness = parameters['stickiness']
group_id = parameters['groupId']
rollout = parameters['rollout']
unless STICKINESS_SETTINGS.include?(stickiness)
options = STICKINESS_SETTINGS.to_sentence(last_word_connector: ', or ')
parameters_error("stickiness parameter must be #{options}")
end
unless group_id.is_a?(String) && group_id.match(/\A[a-z]{1,32}\z/)
parameters_error('groupId parameter is invalid')
end
unless within_range?(rollout, 0, 100)
parameters_error('rollout must be a string between 0 and 100 inclusive')
end
end
def parameters_error(message)
errors.add(:parameters, message)
false
end
end
end
end
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