66 lines
2.3 KiB
Ruby
66 lines
2.3 KiB
Ruby
# frozen_string_literal: true
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# License: AGPL-3.0-or-later WITH Web-Template-Output-Additional-Permission-3.0-or-later
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class CopyNamingAlgorithm
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DEFAULT_MAX_LENGTH = 255
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DEFAULT_MAX_COPIES = 255
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DEFAULT_SEPARATOR_BEFORE_COPY_NUMBER = '_'
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def copy_addition
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raise NotImplementedError
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end
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def separator_before_copy_number
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DEFAULT_SEPARATOR_BEFORE_COPY_NUMBER
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end
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def max_length
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DEFAULT_MAX_LENGTH
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end
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def max_copies
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DEFAULT_MAX_COPIES
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end
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def get_already_used_name_entities(_base_name)
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raise NotImplementedError
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end
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def get_name_for_entity(name_entity)
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name_entity
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end
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def create_copy_name(name_to_copy)
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# remove copy addition and number
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base_name = name_to_copy.gsub(/#{Regexp.quote(copy_addition)}(#{Regexp.quote(separator_before_copy_number)}\d+)?\z/, '')
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name_entities_to_check_against = get_already_used_name_entities(base_name).collect { |entity| get_name_for_entity(entity) }.to_a
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(0..max_copies - 1).each do |copy_num|
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name_to_test = generate_name(base_name, copy_num)
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if name_entities_to_check_against.none? { |entity_name| entity_name == name_to_test }
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return name_to_test
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end
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end
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raise UnableToCreateNameCopyError, "It's not possible to generate a UNIQUE name using name_to_copy: #{name_to_copy} copy_addition: #{copy_addition} separator_before_copy_number: #{separator_before_copy_number} max_copy_num: #{max_copies} max_length: #{max_length}"
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end
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def generate_name(name_to_copy, copy_num)
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what_to_add = copy_addition + separator_before_copy_number + generate_copy_number(copy_num)
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# is what_to_add longer than max length? If so, it's not possible to create a copy
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if what_to_add.length > max_length
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raise UnableToCreateNameCopyError, "It's not possible to generate a name using name_to_copy: #{name_to_copy} copy_addition: #{copy_addition} separator_before_copy_number: #{separator_before_copy_number} copy_num: #{copy_num} max_length: #{max_length}"
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end
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max_length_for_name_to_copy = max_length - what_to_add.length
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name_to_copy[0..max_length_for_name_to_copy - 1] + what_to_add
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end
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def generate_copy_number(unprefixed_copy_number)
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number_of_digits = Math.log10(max_copies).floor + 1
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format("%0#{number_of_digits}d", unprefixed_copy_number)
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end
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end
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class UnableToCreateNameCopyError < ArgumentError
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end
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