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24 lines
526 B
Ruby
24 lines
526 B
Ruby
module Roids
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extend ActiveSupport::Concern
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ID_CHAR_LIMIT = 8
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included do
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def roid
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id_size = id.to_s.size
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if id_size <= ID_CHAR_LIMIT
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"EIS-#{id}"
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else
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roid_with_prefix(id_size)
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end
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end
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private
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def roid_with_prefix(id_size)
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id_delta = id_size - ID_CHAR_LIMIT
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id_prefix = id.to_s.split(//).first(id_delta).join('').to_s
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id_postfix = id.to_s.split(//).last(id_size - id_delta).join('').to_s
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"EIS#{id_prefix}-#{id_postfix}"
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end
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end
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end
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