Module: SimpleService::ServiceBase::InstanceMethods

Included in:
Command, Organizer
Defined in:
lib/simple_service/service_base.rb

Instance Method Summary collapse

Instance Method Details

#all_context_keys ⇒ Object 



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# File 'lib/simple_service/service_base.rb', line 96

def all_context_keys
  (expects + returns + ['message', 'success']).uniq
end

#define_getters_and_setters ⇒ Object 



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# File 'lib/simple_service/service_base.rb', line 105

def define_getters_and_setters
  all_context_keys.each do |key|
    self.class.class_eval do

      # getter
      define_method key do
        self.context[key]
      end

      # setter
      define_method "#{key}=" do |val|
        self.context[key] = val
      end

    end
  end
end

#expects ⇒ Object 



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# File 'lib/simple_service/service_base.rb', line 84

def expects
  self.class.instance_variable_get('@expects') || []
end

#failure!(message = nil) ⇒ Object 



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# File 'lib/simple_service/service_base.rb', line 100

def failure!(message = nil)
  context[:success] = false
  context[:message] = message || 'There was a problem'
end

#find_specified_return_keys ⇒ Object 



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# File 'lib/simple_service/service_base.rb', line 67

def find_specified_return_keys
  if returns.nil? || returns.empty?
    context
  else
    returns.inject({}) do |to_return, return_param|
      if context.has_key?(return_param)
        to_return[return_param] = context[return_param]
      else
        error_msg = "#{self.class} tried to return #{return_param}, but it did not exist in the context: #{context.inspect}"
        raise ReturnKeyError, error_msg
      end

      to_return
    end
  end
end

#return_context_with_success_status ⇒ Object 



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# File 'lib/simple_service/service_base.rb', line 55

def return_context_with_success_status
  _context = find_specified_return_keys

  # only automatically set context[:success] on Organizers and only if its not already set
  # by a command calling #failure!
  if !_context.has_key?(:success) && self.class.ancestors.include?(SimpleService::Organizer)
    _context[:success] = true
  end

  _context
end

#returns ⇒ Object 



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# File 'lib/simple_service/service_base.rb', line 88

def returns
  self.class.instance_variable_get('@returns') || []
end

#setup_call_chain ⇒ Object

sets up an “after” filter for #call

allows user to implement #call in their individual command and organizer # classes without having to rely on super or executing another other method to do post #call housekeeping such as returning only specific context keys



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# File 'lib/simple_service/service_base.rb', line 34

def setup_call_chain
  self.class.class_eval do

    # grab the method object and hold onto it here
    call_method = instance_method(:call)

    # redefine the call method, execute the existing call method object,
    # and then run return key checking...
    define_method :call do
      call_method.bind(self).call
      return_context_with_success_status
    end
  end
end

#skip_validation ⇒ Object 



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# File 'lib/simple_service/service_base.rb', line 92

def skip_validation
  self.class.instance_variable_get('@skip_validation')
end

#symbolize_context_keys ⇒ Object 



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# File 'lib/simple_service/service_base.rb', line 49

def symbolize_context_keys
  context.keys.each do |key|
    context[key.to_sym] = context.delete(key)
  end
end