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# File 'lib/tzu/sequence.rb', line 3
def self.included(base)
base.class_eval do
include Hooks
class << self
attr_reader :steps, :result_block
def run(*params)
new(*params).run
end
def type
@type ||= :take_last
end
def result(type = nil, &block)
return @result_block = block if block
@type = type
end
def step(klass, &block)
@steps = [] unless @steps
step = Step.new(klass)
step.instance_eval(&block) if block
@steps << step
end
end
def initialize(*params)
@params = params
@last_outcome = nil
@prior_results = {}
end
def run
results = sequence_results
return mutated_result(results) if self.class.result_block
return @last_outcome if self.class.type == :take_last
Outcome.new(true, results)
end
def sequence_results
with_hooks(@params) do |params|
self.class.steps.reduce({}) do |prior_results, step|
@last_outcome = step.run(*params, prior_results)
break if last_outcome_is_failure?
merge_last_outcome_into_prior_results(step, prior_results)
end
end
end
private
def last_outcome_is_failure?
return true if (@last_outcome.respond_to?(:failure?) && @last_outcome.failure?)
false
end
def merge_last_outcome_into_prior_results(step, prior_results)
result = @last_outcome.respond_to?(:result) ? @last_outcome.result : @last_outcome
prior_results.merge(step.name => result)
end
def mutated_result(results)
Outcome.new(true, instance_exec(@params, results, &self.class.result_block))
end
end
end
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