71 lines
1.6 KiB
Ruby
71 lines
1.6 KiB
Ruby
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require 'mixin/instance_wrapper'
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class Sequencer
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class Units
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include ::Enumerable
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include ::Mixin::InstanceWrapper
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wrap :@units
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# Initializes a new Sequencer::Units instance with the given Units Array.
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#
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# @param [*Array<String>] *units a list of Units with or without the Sequencer::Unit prefix.
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#
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# @example
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# Sequencer::Units.new('Example::Unit', 'Sequencer::Unit::Second::Unit')
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def initialize(*units)
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@units = units
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end
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# Required #each implementation for ::Enumerable functionality. Constantizes
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# the list of units given when initialized.
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#
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# @example
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# units.each do |unit|
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# unit.process(sequencer)
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# end
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#
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# @return [nil]
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def each
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@units.each do |unit|
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yield constantize(unit)
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end
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end
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# Provides an Array of :uses and :provides declarations for each Unit.
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#
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# @example
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# units.declarations
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# #=> [{uses: [:question], provides: [:answer], ...}]
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#
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# @return [Array<Hash{Symbol => Array<Symbol>}>] the declarations of the Units
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def declarations
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collect do |unit|
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{
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uses: unit.uses,
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provides: unit.provides,
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}
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end
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end
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# Enables the access to an Unit class via index.
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#
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# @param [Integer] index the index for the requested Unit class.
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#
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# @example
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# units[1]
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# #=> Sequencer::Unit::Example
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#
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# @return [Object] the Unit class for the requested index
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def [](index)
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constantize(@units[index])
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end
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private
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def constantize(unit)
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Sequencer::Unit.constantize(unit)
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end
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end
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end
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