Module: SequentialWorkflow

Defined in:
lib/sequential_workflow.rb,
lib/sequential_workflow/version.rb

Constant Summary collapse

VERSION = 
"0.0.5"

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#workflow_state ⇒ Object

Returns the value of attribute workflow_state.



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# File 'lib/sequential_workflow.rb', line 5

def workflow_state
  @workflow_state
end

Instance Method Details

#catch(catch_with) ⇒ Object 



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# File 'lib/sequential_workflow.rb', line 14

def catch(catch_with)
  method(catch_with).call(@reason) if rejected?
end

#fulfill(value) ⇒ Object 



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# File 'lib/sequential_workflow.rb', line 31

def fulfill(value)
  @workflow_state = :fulfilled
  @value = value
  self
end

#reject(e) ⇒ Object 



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# File 'lib/sequential_workflow.rb', line 37

def reject(e)
  @workflow_state = :rejected
  @reason = e
  self
end

#rejected? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sequential_workflow.rb', line 43

def rejected?
  @workflow_state == :rejected
end

#start(initial_method) ⇒ Object 



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# File 'lib/sequential_workflow.rb', line 7

def start(initial_method)
  result = method(initial_method).call
  fulfill result
rescue => e
  reject(e)
end

#then(on_success, rescue_with = nil) ⇒ Object 



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# File 'lib/sequential_workflow.rb', line 18

def then(on_success, rescue_with = nil)
  case workflow_state
  when :fulfilled
    result = method(on_success).call(@value)
    fulfill result
  when :rejected
    method(rescue_with).call(@reason) if rescue_with
    self
  end
rescue => e
  reject e
end