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@joshnesbitt
Created July 23, 2015 15:44
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class Company
TooManyManagingDirectorsError = Class.new(Exception)
class Department
attr_reader :company,
:name,
:employees
def initialize(company, name, &block)
@company = company
@name = name
@employees = []
instance_eval(&block)
end
def employee(&block)
@employees << Employee.new(self, &block)
end
end
class Employee
attr_reader :deparment
def initialize(deparment, &block)
@deparment = deparment
instance_eval(&block)
end
def managing_director
if @deparment.company.managing_director.nil?
@managing_director = true
else
raise TooManyManagingDirectorsError
end
end
def managing_director?
!!@managing_director
end
%w( first_name last_name role ).each do |method|
define_method method do |*args|
attribute = "@#{method}"
if args.empty?
self.instance_variable_get(attribute)
else
self.instance_variable_set(attribute, args.first)
end
end
end
end
attr_reader :departments
def initialize(&block)
@departments = []
instance_eval(&block)
end
def department(name, &block)
departments << Department.new(self, name, &block)
end
def employees
departments.map do |department|
department.employees
end.flatten
end
def managing_director
employees.select { |e| e.managing_director? }.first
end
end
def company(&block)
if block_given?
@company = Company.new(&block)
else
@company
end
end
require_relative 'run'
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