An even more flexible approach which allows for easy customization/
extension, using registration of "result handlers" called in
succession in a sort of chain pattern.
def do_tag(context, *args)
result_output = ""
args.each_with_index do |arg_item, index|
...
sub_result_output, return_context = result_handler
(result_output, context, arg_result)
...
end
...
end
# register result handlers
# you can add more runtime if needed
result_handlers = [handle_res_1, handle_res_2]
def result_handler(result_output, context, arg_result)
result_handlers.each do |handler|
result_output, context = handler.call(result_output, context,
arg_result)
end
return result_output, context
end
# always return an output and a context (to be added to parent
context)
# default handler only supplies comma functionality
def handle_res_1(result_output, context, arg_result)
if context[:separator]
result_output, context = do_separator(result_output, context,
arg_result)
end
if
...
end
return result_output, context
end
# you can define your own custom result handlers to handle new
requirements
def handle_res_2(result_output, context, arg_result)
...
return result_output, context
end
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