patient.rb

class Patient
  attr_accessor :room, :id

  def initialize(attributes = {})
    @id = attributes[:id]
    @name = attributes[:name]
    @cured = attributes[:cured] || false
  end
end

patient_repository.rb

require_relative "patient"
require "csv"

class PatientRepository

  def initialize(csv_file, room_repository)
    @room_repository = room_repository
    @csv_file = csv_file
    @patients = []
    @next_id = 1
    load_csv
  end

  def add_patient(patient)
    patient.id = @next_id
    @patients << patient
    @next_id += 1
  end

  def load_csv
    csv_options = { headers: :first_row, header_converters: :symbol }
    CSV.foreach(@csv_file, csv_options) do |row|

      row[:id]    = row[:id].to_i          # Convert column to Integer
      row[:cured] = row[:cured] == "true"  # Convert column to boolean

      room = @room_repository.find(row[:room_id].to_i)

      patient = Patient.new(row)
      patient.room = room

      @patients << patient
      @next_id = row[:id]
    end
    # if @patients.empty?
    #   @next_id = 1
    # else
    #   @next_id = @patients.last.id + 1
    # end
    @next_id = @patients.empty? ? 1 : @patients.last.id + 1
  end
end

repo = PatientRepository.new("patients.csv")
katherine = Patient.new(name: "kat")
repo.add_patient(katherine)
# p repo

patients.csv

room.rb

require_relative "patient"

class Room
  attr_reader :capacity
  attr_accessor :id

  def initialize(attributes = {})
    # STATE
    @capacity = attributes[:capacity] || 0
    @patients = attributes[:patients] || [] # Instances of the Patient class
  end

  # BEHAVIOUR

  def full?
    @patients.length == @capacity
  end

  def add_patient(patient)
    raise StandardError, "Room is full!" if full?
    patient.room = self
    @patients << patient
  end
end

p room_1 = Room.new(capacity: 1)
# john = Patient.new(name: "john", cured: false)
# steve = Patient.new(name: "steve", cured: false)

# room_1.add_patient(john)
# room_1.add_patient(steve)

# # p room_1

# p john.room
# room_1.patients

# p room_1.full?

room_repository.rb

# class RoomRepository

#   def initialize(csv_file)
#     @csv_file = csv_file
#     @rooms = []
#     load_csv
#   end

#   def find(id)
#     @rooms.select do |room|
#       room.id == id
#     end.first
#   end

  # def load_csv
  #   TODO
  # end
# end