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# frozen_string_literal: true
module BulkImports
module Common
module Extractors
class NdjsonExtractor
include Gitlab::ImportExport::CommandLineUtil
include Gitlab::Utils::StrongMemoize
def initialize(relation:)
@relation = relation
@tmp_dir = Dir.mktmpdir
end
def extract(context)
download_service(tmp_dir, context).execute
decompression_service(tmp_dir).execute
relations = ndjson_reader(tmp_dir).consume_relation('', relation)
BulkImports::Pipeline::ExtractedData.new(data: relations)
end
def remove_tmp_dir
FileUtils.remove_entry(tmp_dir)
end
private
attr_reader :relation, :tmp_dir
def filename
@filename ||= "#{relation}.ndjson.gz"
end
def download_service(tmp_dir, context)
@download_service ||= BulkImports::FileDownloadService.new(
configuration: context.configuration,
relative_url: context.entity.relation_download_url_path(relation),
dir: tmp_dir,
filename: filename
)
end
def decompression_service(tmp_dir)
@decompression_service ||= BulkImports::FileDecompressionService.new(dir: tmp_dir, filename: filename)
end
def ndjson_reader(tmp_dir)
@ndjson_reader ||= Gitlab::ImportExport::Json::NdjsonReader.new(tmp_dir)
end
end
end
end
end
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