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28 lines
536 B
Ruby
28 lines
536 B
Ruby
class TypeDispatcher
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def initialize(target)
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@target = target
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@on = {}
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end
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def name_to_event(ob)
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name = ob.to_s.split("::").last.split(/([A-Z][a-z]+)/).join("_").downcase
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"on_#{name}".gsub(/__+/,"_").to_sym
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end
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def on(event, &block)
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@on[name_to_event(event)] = block
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end
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def call(ob, *args)
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sym = name_to_event(ob)
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if @on[sym]
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@on[sym].(*args)
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elsif @target.respond_to?(sym)
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arity = @target.method(sym).arity
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@target.send(sym, *args[0...arity])
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end
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end
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end
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