Module: DatashiftJourney::ValidateState

Extended by:
ActiveSupport::Concern
Included in:
JourneyPlansController
Defined in:
app/controllers/concerns/datashift_journey/validate_state.rb

Instance Method Summary collapse

Instance Method Details

#back_button_cache_buster ⇒ Object

jacopretorius.net/2014/01/force-page-to-reload-on-browser-back-in-rails.html



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# File 'app/controllers/concerns/datashift_journey/validate_state.rb', line 9

def back_button_cache_buster
  response.headers['Cache-Control'] = 'no-cache, no-store, max-age=0, must-revalidate'
  response.headers['Pragma'] = 'no-cache'
  response.headers['Expires'] = 'Fri, 01 Jan 1990 00:00:00 GMT'
end

#back_button_param_list ⇒ Object 



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# File 'app/controllers/concerns/datashift_journey/validate_state.rb', line 54

def back_button_param_list
  @back_button_param_list ||= [:state, :id, :action, :controller]
end

#validate_state ⇒ Object

Currently the following Situations need special processing, carried out here.

* REFRESH - users hits refresh & resubmits a form - check state associated with view

It is not expected to redirect or halt processing chain - it is simply to ensure state is manged correctly, for situations outside standard state flow/processing

rubocop:disable Style/GuardClause



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# File 'app/controllers/concerns/datashift_journey/validate_state.rb', line 23

def validate_state
  current_index = journey_plan.current_state_index

  view_state = params[:rendered_state]

  view_state_idx = journey_plan.state_index(view_state) # nil for bad states

  logger.debug 'STATE and Param INFO:'
  logger.debug "  Current State   \t[#{journey_plan.state.inspect}] IDX [#{current_index}]"
  logger.debug "  Rendered State  \t[#{view_state}] IDX [#{view_state_idx}]"
  logger.debug "  Redirect to     \t[#{params[:redirect_to]}]"

  if view_state && view_state_idx && (view_state_idx < current_index)
    logger.info("Probable User refresh, resetting state #{view_state} [IDX (#{view_state_idx})]")
    journey_plan.state = view_state
  end

  if view_state.nil? && params[:state] && back_button_param_list.all? { |p| params.key?(p) }

    transitions = journey_plan.transitions_for

    back_event = transitions.find { |t| t.event == :back }

    if back_event && back_event.from == journey_plan.state && back_event.to == params[:state]
      logger.debug("User CLICKED back Button - resetting state to [#{params[:state]}] from #{journey_plan.state}")
      journey_plan.update!(state: params[:state])
    end

  end
end