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32 lines
876 B
32 lines
876 B
module Squib |
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# @api private |
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module Args |
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class CardRange |
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include Enumerable |
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def initialize(input, deck_size: 1) |
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@range = validate(input, deck_size) |
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end |
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# Hook into enumerable by delegating to @range |
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def each(&block) |
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@range.each { |i| block.call(i) } |
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end |
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def size |
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@range.size |
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end |
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private |
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def validate(input, deck_size) |
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input ||= :all # default |
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input = 0..(deck_size - 1) if input == :all |
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input = (input.to_i)..(input.to_i) if input.respond_to? :to_i |
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raise ArgumentError.new("#{input} must be Enumerable (i.e. respond_to :each).") unless input.respond_to? :each |
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raise ArgumentError.new("#{input} is outside of deck range of 0..#{deck_size - 1}") if (!input.max.nil?) && (input.max > (deck_size - 1)) |
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input |
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end |
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end |
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end |
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end
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