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# frozen_string_literal: true
module Gitlab
module ImportExport
module Json
class NdjsonReader
MAX_JSON_DOCUMENT_SIZE = 50.megabytes
attr_reader :dir_path
def initialize(dir_path)
@dir_path = dir_path
@consumed_relations = Set.new
end
def exist?
Dir.exist?(@dir_path)
end
# This can be removed once legacy_reader is deprecated.
def legacy?
false
end
def consume_attributes(importable_path)
# This reads from `tree/project.json`
path = file_path("#{importable_path}.json")
data = File.read(path, MAX_JSON_DOCUMENT_SIZE)
json_decode(data)
end
def consume_relation(importable_path, key, mark_as_consumed: true)
Enumerator.new do |documents|
next if mark_as_consumed && !@consumed_relations.add?("#{importable_path}/#{key}")
# This reads from `tree/project/merge_requests.ndjson`
path = file_path(importable_path, "#{key}.ndjson")
next unless File.exist?(path)
File.foreach(path, MAX_JSON_DOCUMENT_SIZE).with_index do |line, line_num|
documents << [json_decode(line), line_num]
end
end
end
private
def json_decode(string)
Gitlab::Json.parse(string)
rescue JSON::ParserError => e
Gitlab::ErrorTracking.log_exception(e)
raise Gitlab::ImportExport::Error, 'Incorrect JSON format'
end
def file_path(*path)
File.join(dir_path, *path)
end
end
end
end
end
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