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# frozen_string_literal: true
module Gitlab
module Verify
class BatchVerifier
attr_reader :batch_size, :start, :finish
def initialize(batch_size:, start: nil, finish: nil)
@batch_size = batch_size
@start = start
@finish = finish
fix_google_api_logger
end
# Yields a Range of IDs and a Hash of failed verifications (object => error)
def run_batches(&blk)
all_relation.in_batches(of: batch_size, start: start, finish: finish) do |batch| # rubocop: disable Cop/InBatches
range = batch.first.id..batch.last.id
failures = run_batch_for(batch)
yield(range, failures)
end
end
def name
raise NotImplementedError
end
def describe(_object)
raise NotImplementedError
end
private
def run_batch_for(batch)
batch.map { |upload| verify(upload) }.compact.to_h
end
def verify(object)
local?(object) ? verify_local(object) : verify_remote(object)
rescue StandardError => err
failure(object, err.inspect)
end
def verify_local(object)
expected = expected_checksum(object)
actual = actual_checksum(object)
return failure(object, 'Checksum missing') unless expected.present?
return failure(object, 'Checksum mismatch') unless expected == actual
success
end
# We don't calculate checksum for remote objects, so just check existence
def verify_remote(object)
return failure(object, 'Remote object does not exist') unless remote_object_exists?(object)
success
end
def success
nil
end
def failure(object, message)
[object, message]
end
# It's already set to Logger::INFO, but acts as if it is set to
# Logger::DEBUG, and this fixes it...
def fix_google_api_logger
require 'google/apis'
Google::Apis.logger.level = Logger::INFO
end
# This should return an ActiveRecord::Relation suitable for calling #in_batches on
def all_relation
raise NotImplementedError
end
# Should return true if the object is stored locally
def local?(_object)
raise NotImplementedError
end
# The checksum we expect the object to have
def expected_checksum(_object)
raise NotImplementedError
end
# The freshly-recalculated checksum of the object
def actual_checksum(_object)
raise NotImplementedError
end
# Be sure to perform a hard check of the remote object (don't just check DB value)
def remote_object_exists?(object)
raise NotImplementedError
end
end
end
end
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