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# frozen_string_literal: true
module Gitlab
module Diff
module FileCollection
module PaginatedDiffs
include Gitlab::Utils::StrongMemoize
extend ::Gitlab::Utils::Override
override :diffs
def diffs
merge_request_diff.opening_external_diff do
# Avoiding any extra queries.
collection = paginated_collection.to_a
# The offset collection and calculation is required so that we
# know how much has been loaded in previous batches, collapsing
# the current paginated set accordingly (collection limit calculation).
# See: https://docs.gitlab.com/ee/development/diffs.html#diff-collection-limits
#
offset_index = collection.first&.index
options = diff_options.dup
collection =
if offset_index && offset_index > 0
offset_collection = relation.limit(offset_index) # rubocop:disable CodeReuse/ActiveRecord
options[:offset_index] = offset_index
offset_collection + collection
else
collection
end
Gitlab::Git::DiffCollection.new(collection.map(&:to_hash), options)
end
end
strong_memoize_attr :diffs
private
attr_reader :merge_request_diff, :paginated_collection
def relation
merge_request_diff.merge_request_diff_files
end
end
end
end
end
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