Class: Formulary::FormularyItemFactory

Inherits:
Object
  • Object
show all
Defined in:
lib/formulary/formulary_item_factory.rb

Overview

Class to build FormularyItem (FHIR Basic) resources from a QHPPlanDrug

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(plan, plan_drug) ⇒ FormularyItemFactory

Returns a new instance of FormularyItemFactory.



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# File 'lib/formulary/formulary_item_factory.rb', line 12

def initialize(plan, plan_drug)
  @plan = plan
  @plan_drug = plan_drug
end

Instance Attribute Details

#plan ⇒ Object (readonly)

Returns the value of attribute plan.



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# File 'lib/formulary/formulary_item_factory.rb', line 10

def plan
  @plan
end

#plan_drug ⇒ Object (readonly)

Returns the value of attribute plan_drug.



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# File 'lib/formulary/formulary_item_factory.rb', line 10

def plan_drug
  @plan_drug
end

Instance Method Details

#availability_period_extension ⇒ Object (private) 



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# File 'lib/formulary/formulary_item_factory.rb', line 97

def availability_period_extension
  current_year = Date.today.year
  {
    url: AVAILABILITY_PERIOD_EXTENSION,
    valuePeriod: {
      start: "#{current_year}-01-01",
      end: "#{current_year}-12-31",
    },
  }
end

#availability_status_extension ⇒ Object (private) 



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# File 'lib/formulary/formulary_item_factory.rb', line 90

def availability_status_extension
  {
    url: AVAILABILITY_STATUS_EXTENSION,
    valueCode: "active",
  }
end

#build ⇒ Object

Construct a FHIR Basic instance



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# File 'lib/formulary/formulary_item_factory.rb', line 18

def build
  FHIR::Basic.new(
    id: FORMULARY_ITEM_ID_PREFIX + plan.id + "-" + plan_drug.rxnorm_code,
    meta: meta,
    text: text,
    extension: extension,
    code: code,
    subject: subject,
  )
end

#code ⇒ Object (private) 



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# File 'lib/formulary/formulary_item_factory.rb', line 61

def code
  {
    coding: [
      {
        system: FORMULARY_ITEM_SYSTEM,
        code: "formulary-item",
        display: "Formulary Item",
      },
    ],
  }
end

#drug_tier_extension ⇒ Object (private) 



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# File 'lib/formulary/formulary_item_factory.rb', line 139

def drug_tier_extension
  {
    url: DRUG_TIER_ID_EXTENSION,
    valueCodeableConcept: {
      coding: [
        {
          code: plan_drug.tier,
          display: DRUG_TIER_DISPLAY[plan_drug.tier],
          system: DRUG_TIER_SYSTEM,
        },
      ],
    },
  }
end

#extension ⇒ Object (private) 



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# File 'lib/formulary/formulary_item_factory.rb', line 45

def extension
  [
    formulary_reference_extension,
    availability_status_extension,
    availability_period_extension,
    pharmacy_type_extensions,
    drug_tier_extension,
    prior_auth_extension,
    prior_auth_new_start_extension,
    step_therapy_extension,
    step_therapy_new_start_extension,
    quantity_limit_extension,
    quantity_limit_detail_extension,
  ].flatten.compact
end

#formulary_reference_extension ⇒ Object (private) 



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# File 'lib/formulary/formulary_item_factory.rb', line 80

def formulary_reference_extension
  {
    url: FORMULARY_REFERENCE_EXTENSION,
    valueReference: {
      reference: "InsurancePlan/" + FORMULARY_ID_PREFIX + plan.id,
      type: "InsurancePlan",
    },
  }
end

#meta ⇒ Object (private) 



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# File 'lib/formulary/formulary_item_factory.rb', line 31

def meta
  {
    profile: [FORMULARY_ITEM_PROFILE],
    lastUpdated: "2021-08-31T10:03:10Z",
  }
end

#pharmacy_type_extension(pharmacy_type) ⇒ Object (private) 



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# File 'lib/formulary/formulary_item_factory.rb', line 122

def pharmacy_type_extension(pharmacy_type)
  return if pharmacy_type.nil?

  {
    url: PHARMACY_TYPE_EXTENSION,
    valueCodeableConcept: {
      coding: [
        {
          code: pharmacy_type,
          display: PHARMACY_TYPE_DISPLAY[pharmacy_type],
          system: PHARMACY_TYPE_SYSTEM,
        },
      ],
    },
  }
end

#pharmacy_type_extensions ⇒ Object (private) 



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# File 'lib/formulary/formulary_item_factory.rb', line 108

def pharmacy_type_extensions
  pharmacy_list = Array.new
  # Put all pharmacy types into an array
  plan.tiers.each do |tier|
    qhp_drug = QHPDrugTier.new(tier)
    qhp_drug.cost_sharing.each do |cost_sharing|
      if (pharmacy_list.include?(cost_sharing.pharmacy_type) == false)
        pharmacy_list.push(cost_sharing.pharmacy_type)
      end
    end
  end
  pharmacy_list.map { |pharmacy_type| pharmacy_type_extension(pharmacy_type) }
end

#prior_auth_extension ⇒ Object (private) 



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# File 'lib/formulary/formulary_item_factory.rb', line 154

def prior_auth_extension
  {
    url: PRIOR_AUTH_EXTENSION,
    valueBoolean: plan_drug.prior_auth?,
  }
end

#prior_auth_new_start_extension ⇒ Object (private) 



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# File 'lib/formulary/formulary_item_factory.rb', line 161

def prior_auth_new_start_extension
  if plan_drug.prior_auth?
    # Compute a number to get a new start only value related to this formulary item
    compnumber = plan_drug.rxnorm_code.tr("^0-9", "") + plan.id.tr("^0-9", "") #.to_i.digits.sum.to_s
    while compnumber.length > 1
      compnumber = compnumber.to_i.digits.sum.to_s
    end
    compnumber = compnumber.to_i % 2

    {
      url: PRIOR_AUTH_NEW_START_EXTENSION,
      valueBoolean: compnumber.zero?,
    }
  end
end

#quantity_limit_detail_extension ⇒ Object (private) 



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# File 'lib/formulary/formulary_item_factory.rb', line 206

def quantity_limit_detail_extension
  if plan_drug.quantity_limit?
    ext = QuantityLimitDetailExtensionFactory.new(plan_drug.name)
    ext.build
  end
end

#quantity_limit_extension ⇒ Object (private) 



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# File 'lib/formulary/formulary_item_factory.rb', line 199

def quantity_limit_extension
  {
    url: QUANTITY_LIMIT_EXTENSION,
    valueBoolean: plan_drug.quantity_limit?,
  }
end

#step_therapy_extension ⇒ Object (private) 



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# File 'lib/formulary/formulary_item_factory.rb', line 177

def step_therapy_extension
  {
    url: STEP_THERAPY_EXTENSION,
    valueBoolean: plan_drug.step_therapy_limit?,
  }
end

#step_therapy_new_start_extension ⇒ Object (private) 



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# File 'lib/formulary/formulary_item_factory.rb', line 184

def step_therapy_new_start_extension
  if plan_drug.step_therapy_limit?
    # Compute a number to get a new start only value related to this formulary item
    compnumber = plan_drug.rxnorm_code.tr("^0-5", "") + plan.id.tr("^0-5", "") #.to_i.digits.sum.to_s
    while compnumber.length > 1
      compnumber = compnumber.to_i.digits.sum.to_s
    end
    compnumber = compnumber.to_i % 2
    {
      url: STEP_THERAPY_NEW_START_EXTENSION,
      valueBoolean: compnumber.zero?,
    }
  end
end

#subject ⇒ Object (private) 



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# File 'lib/formulary/formulary_item_factory.rb', line 73

def subject
  {
    reference: "MedicationKnowledge/" + DRUG_ID_PREFIX + plan_drug.rxnorm_code,
    type: "MedicationKnowledge",
  }
end

#text ⇒ Object (private) 



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# File 'lib/formulary/formulary_item_factory.rb', line 38

def text
  {
    status: "generated",
    div: "<div xmlns=\"http://www.w3.org/1999/xhtml\">Formulary Item for Plan: #{plan.id}; RxNorm: #{plan_drug.rxnorm_code}</div>",
  }
end