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Solution for Hospital Interface
# Solution for Challenge: Hospital Interface. Started 2013-02-27T02:57:40+00:00
require 'rubygems'
require 'highline/import'
class Hospital
attr_reader :name, :city, :employees, :patients
def initialize(name, city, capacity=500)
@name = name
@city = city
@capacity = capacity
@employees = []
@patients = []
end
def hire_employee(name, position, username, password)
@employees << Employee.new(name, position, username, password)
end
def admit_patient(name, illness)
@patients << Patient.new(name, illness)
end
end
class System
def initialize(hospital)
@hospital = hospital
@attempted_username = nil
@password_try_counter = 2
end
def login
puts "Welcome to #{@hospital.name} in #{@hospital.city}"
puts "------------------------------------------------"
ask_username
puts "------------------------------------------------"
end
def ask_username
username = ask("Enter your username: ")
username(username)
end
def ask_password
password = ask("Enter super-secret password (#{@password_try_counter + 1} attempts remaining): ") { |q| q.echo = "*" }
password(password)
end
def username(username)
username_list = []
@hospital.employees.each_with_index do |x, i|
username_list << x.username
@attempted_username = i
end
if username_list.include?(username)
ask_password
else
puts "User Not Found, Try again"
ask_username
end
end
def password(password)
until @password_try_counter == 0
if @hospital.employees[@attempted_username].password == password
menu
@password_try_counter = 2
break
else
puts "Wrong password, please try again."
@password_try_counter -= 1
ask_password
end
end
if @password_try_counter == 0
puts "Authentication failed, goodbye."
exit
end
end
def menu
puts "------------------------------------------------"
puts "What would you like to do?"
puts "Options:"
puts "1. List patients"
puts "2. View records <patient id>"
puts "3. Add record <patient id>"
puts "4. Remove patient <patient id>"
puts "5. Exit"
selection = ask("Enter number: ")
case selection.to_i
when 1 then list_patients
when 2 then view_records
when 3 then add_record
when 4 then delete_record
when 5 then exit
else menu
end
end
def list_patients
@hospital.patients.each do |x|
puts "#{x.name} #{x.patient_id}"
end
menu
end
def view_records
entered_id = ask("Please enter the patient ID: ")
@hospital.patients.each do |x|
puts x if x.patient_id.to_i == entered_id.to_i
end
menu
end
def add_record
name = ask("Please enter the patient's name: ")
illness = ask("Please enter the patient's illness: ")
@hospital.admit_patient(name, illness)
menu
end
def delete_record
entered_id = ask("Please enter the patient ID: ")
delete_index = nil
@hospital.patients.each_with_index do |x, i|
delete_index = i if x.patient_id.to_i == entered_id.to_i
end
@hospital.patients.delete_at(delete_index)
menu
end
end
class Patient
attr_reader :patient_id, :name, :illness
def initialize(name, illness)
@name = name
@illness = illness
@patient_id = self.object_id
end
def to_s
puts "Name: #{name}"
puts "Illness: #{illness}"
puts "Patient ID: #{patient_id}"
end
end
class Employee
attr_reader :name, :position, :username, :password
def initialize(name, position, username, password)
@name = name
@position = position
@username = username
@password = password
end
end
hospital = Hospital.new('DBC Hospital', 'San Francisco')
hospital.hire_employee('Chris Malin', 'Head Neurosurgeon', 'chris', 'thepassword')
hospital.admit_patient('David Wen', 'Coding-phobia')
system = System.new(hospital)
system.login
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