Work on question 6

4 files changed, 146 insertions, 0 deletions

diff --git a/assignments/3/README.md b/assignments/3/README.md
index 080a1fe..e09cfbb 100644
--- a/assignments/3/README.md
+++ b/assignments/3/README.md
@@ -128,3 +128,5 @@ From the requirements for this database, the following information was collected
 * The database also keeps track of the types of plane each pilot is authorized to fly, and the types of plane each employee is qualified to service.
 
 **Draw an object-oriented diagram for the Edmonton International Airport database.**
+
+![coop-insurance](./question-6.png)
diff --git a/assignments/3/question-6.png b/assignments/3/question-6.png
new file mode 100644
index 0000000..d73d9eb
--- /dev/null
+++ b/assignments/3/question-6.png
diff --git a/assignments/3/question-6.puml b/assignments/3/question-6.puml
new file mode 100644
index 0000000..51094a9
--- /dev/null
+++ b/assignments/3/question-6.puml
@@ -0,0 +1,78 @@
+@startuml
+Owner <|-- Person
+Owner <|-- Corporation
+Person <|-- Pilot
+Person <|-- Employee
+
+Hanger "1" --> "*" Airplane
+Owner "1" --> "*" Airplane
+Maintenance "1" -- "1" Airplane
+Maintenance "1" -- "1"  Employee
+
+Employee "1" --> "*" Hanger
+Pilot "1" --> "*" Restriction
+Pilot "1" --> "*" Airplane : fly
+Employee "1" --> "*" Airplane : service
+
+class Airplane {
+  {field} id
+	{field} capacity
+	{field} modelNumber
+	{field} registrationNumber
+	{field} weight
+  + hanger : Hanger [1]
+	+ owner : Owner [1]
+  + maintenances : Maintenance[*]
+}
+
+class Maintenance {
+  {field} id
+  {field} workCode
+  {field} startedAt
+  {field} endedAt
+  {method} Duration hours()
+  + employee : Employee [1]
+	+ airplane : Airplane [1]
+}
+
+class Hanger {
+  {field} id
+	{field} number
+	{field} capacity
+	{field} location
+  {field} employee : Employee [1]
+}
+
+abstract class Owner {
+  {field} id
+  {field} name
+  {field} address
+  {field} telephoneNumber
+}
+
+abstract class Person {
+  {field} socialInsuranceNumber
+}
+
+class Pilot {
+  {field} licenseNumber
+  + restrictions : Restriction [*]
+  + canFly : Airplane [*]
+}
+
+class Employee {
+  {field} salary
+  {field} shift
+
+  {method} +canService() : Airplane [*]
+}
+
+class Corporation {
+}
+
+class Restriction {
+  + id
+  + description
+}
+
+@enduml
diff --git a/assignments/3/question-6.rb b/assignments/3/question-6.rb
new file mode 100644
index 0000000..779bc2d
--- /dev/null
+++ b/assignments/3/question-6.rb
@@ -0,0 +1,66 @@
+class Airplane
+  attribute :id
+  attribute :capacity, Integer
+  attribute :model_number, Integer
+  attribute :registration_number, Integer
+  attribute :weight, Integer
+  attribute :plane_type
+
+  belongs_to :hanger
+  belongs_to :owner
+  has_many :maintenances
+end
+
+class Maintenance
+  attribute :id
+  attribute :work_code, String
+  attribute :ended_at, DateTime
+  attribute :started_at, DateTime
+  belongs_to :airplane
+  belongs_to :employee
+
+  def hours
+    ended_at - started_at
+  end
+end
+
+class Hanger
+  attribute :id
+  attribute :capacity, Integer
+  attribute :location, String
+  attribute :number, Integer
+  belongs_to :employee
+end
+
+class Owner
+  attribute :id
+  attribute :name
+  attribute :address
+  attribute :telephone_number
+end
+
+class Person < Owner
+  attribute :social_insurance_number
+end
+
+class Pilot < Person
+  attribute :license_number
+  has_many :restrictions
+
+  def airplanes
+  end
+end
+
+class Employee < Person
+  attribute :salary, Float
+  attribute :shift, Integer
+  has_many :plane_types
+end
+
+class Corporation < Owner
+end
+
+class Restriction
+  attribute :id
+  attribute :description, String
+end