Class: FlowCore::Workflow

Inherits:
ApplicationRecord show all
Defined in:
app/models/flow_core/workflow.rb

Constant Summary collapse

FORBIDDEN_ATTRIBUTES = 
%i[verified verified_at created_at updated_at].freeze

Instance Method Summary collapse

Instance Method Details

#build_instance(attributes = {}) ⇒ Object 



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# File 'app/models/flow_core/workflow.rb', line 24

def build_instance(attributes = {})
  if force_workflow_verified_on_create_instance && invalid?
    raise FlowCore::UnverifiedWorkflow, "Workflow##{id} didn't do soundness check yet."
  end

  instance = instances.new type: instance_class
  on_build_instance(instance)
  instance.assign_attributes attributes.except(FlowCore::Instance::FORBIDDEN_ATTRIBUTES)

  instance
end

#create_instance(attributes = {}) ⇒ Object 



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# File 'app/models/flow_core/workflow.rb', line 36

def create_instance(attributes = {})
  instance = build_instance(attributes)
  return unless instance

  instance.save
  instance
end

#create_instance!(attributes = {}) ⇒ Object 



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# File 'app/models/flow_core/workflow.rb', line 44

def create_instance!(attributes = {})
  instance = build_instance(attributes)
  unless instance
    raise RecordNotSaved.new("Failed to create workflow instance", instance)
  end

  instance.save!
  instance
end

#fork ⇒ Object 



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# File 'app/models/flow_core/workflow.rb', line 137

def fork
  new_workflow = dup

  transaction do
    yield new_workflow if block_given?
    new_workflow.save!

    new_transitions = transitions.includes(:trigger, :callbacks).map do |t|
      new_transition = t.dup
      new_transition.workflow = new_workflow
      new_transition.save!

      if t.trigger
        new_trigger = t.trigger.dup
        new_trigger.workflow = new_workflow
        new_trigger.transition = new_transition
        new_trigger.save!
      end

      t.callbacks.find_each do |cb|
        new_cb = cb.dup
        new_cb.workflow = new_workflow
        new_cb.transition = new_transition
        new_cb.save!
      end

      [t.id, new_transition.id]
    end.to_h

    new_places = places.map do |p|
      new_place = p.dup
      new_place.workflow = new_workflow
      new_place.save!

      [p.id, new_place.id]
    end.to_h

    arcs.includes(:guards).find_each do |a|
      new_arc = a.dup
      new_arc.workflow = new_workflow
      new_arc.place_id = new_places[a.place_id]
      new_arc.transition_id = new_transitions[a.transition_id]
      new_arc.save!

      a.guards.find_each do |g|
        new_guard = g.dup
        new_guard.workflow = new_workflow
        new_guard.arc = new_arc
        new_guard.save!
      end
    end

    new_workflow.verify!
  end
  new_workflow
end

#invalid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/flow_core/workflow.rb', line 54

def invalid?
  !verified?
end

#reset_workflow_verification! ⇒ Object 



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# File 'app/models/flow_core/workflow.rb', line 131

def reset_workflow_verification!
  return unless verified?

  update! verified: false, verified_at: nil
end

#verify! ⇒ Object 



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# File 'app/models/flow_core/workflow.rb', line 126

def verify!
  update! verified: verify?, verified_at: Time.zone.now
  verified
end

#verify? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/flow_core/workflow.rb', line 58

def verify?
  violations.clear

  unless start_place
    violations.add(self, :no_start_place)
  end
  unless end_place
    violations.add(self, :no_end_place)
  end

  return false unless start_place && end_place

  # TODO: Naive implementation for now, Help wanted!

  rgl = to_rgl

  start_place_code = "P_#{start_place.id}"
  end_place_code = "P_#{end_place.id}"

  unless rgl.path?(start_place_code, end_place_code)
    violations.add end_place, :unreachable
  end

  places.find_each do |p|
    next if p == start_place
    next if p == end_place

    place_code = "P_#{p.id}"

    unless rgl.path?(start_place_code, place_code)
      violations.add p, :unreachable
    end

    unless rgl.path?(place_code, end_place_code)
      violations.add p, :impassable
    end
  end
  transitions.includes(:trigger).find_each do |t|
    transition_code = "T_#{t.id}"

    unless rgl.path?(start_place_code, transition_code)
      violations.add t, :unreachable
    end

    unless rgl.path?(transition_code, end_place_code)
      violations.add t, :impassable
    end

    t.verify violations: violations
  end

  violations.empty?
end

#verify_status ⇒ Object 



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# File 'app/models/flow_core/workflow.rb', line 116

def verify_status
  if verified_at.blank?
    :unverified
  elsif verified?
    :verified
  else
    :invalid
  end
end

#violations ⇒ Object 



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# File 'app/models/flow_core/workflow.rb', line 112

def violations
  @violations ||= FlowCore::Violations.new
end