Class: Renalware::Patients::CalculateAge

Inherits:
Object
  • Object
show all
Defined in:
app/models/renalware/patients/calculate_age.rb

Overview

Calculates a patients age. Takes into account:

  • if they have a died_on date, in which case their age never changes

  • which side of ‘today’ their birthday (e.g. May 11) falls, to make sure their age is for example only 99 and not 100 when their birthday is 100 years ago tomorrow, and 100 when its is 100 years ago today or yesterday.

Example usage:

CalculateAge.for(patient) #=> 99

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.for(patient) ⇒ Object 



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# File 'app/models/renalware/patients/calculate_age.rb', line 22

def self.for(patient)
  new(patient).call
end

Instance Method Details

#call ⇒ Object 



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# File 'app/models/renalware/patients/calculate_age.rb', line 26

def call
  return if born_on.blank?

  age = relative_date.year - born_on.year
  age -= 1 if relative_date < (born_on + age.years) # for days before birthday
  age
end