Update Model section of developer guide

docs/DeveloperGuide.md

@@ -118,13 +118,20 @@ How the parsing works:
 ### Model component
 **API** : [`Model.java`](https://github.com/se-edu/addressbook-level3/tree/master/src/main/java/seedu/address/model/Model.java)
 
-<puml src="diagrams/ModelClassDiagram.puml" width="450" />
-
+<puml src="diagrams/ModelClassDiagram.puml" width="450"></puml>
 
 The `Model` component,
 
-* stores the address book data i.e., all `Person` objects (which are contained in a `UniquePersonList` object).
-* stores the currently 'selected' `Person` objects (e.g., results of a search query) as a separate _filtered_ list which is exposed to outsiders as an unmodifiable `ObservableList<Person>` that can be 'observed' e.g. the UI can be bound to this list so that the UI automatically updates when the data in the list change.
+* with regards to `Person` objects:
+  * stores the details of a person in a `PersonDescriptor` object
+  * stores the `PersonDescriptor` object with a `personId` in the `Person` class.
+  * stores the address book data i.e., all `Person` objects (which are contained in a `UniquePersonList` object).
+  * stores the currently 'selected' `Person` objects (e.g., results of a search query) as a separate _filtered_ list which is exposed to outsiders as an unmodifiable `ObservableList<Person>` that can be 'observed' e.g. the UI can be bound to this list so that the UI automatically updates when the data in the list change.
+* with regards to `Appointment` objects:
+  * stores the details of an appointment in a `AppointmentDescriptor` object
+  * stores the `AppointmentDescriptor` object with a `appointmentId` in the `Appointment` class.
+  * stores the address book data i.e., all `Appointment` objects (which are contained in a `UniqueAppointmentList` object).
+  * stores the currently 'selected' `Appointment` objects (e.g., results of a search query) as a separate _filtered_ list which is exposed to outsiders as an unmodifiable `ObservableList<Appointment>` that can be 'observed' e.g. the UI can be bound to this list so that the UI automatically updates when the data in the list change.
 * stores a `UserPref` object that represents the user’s preferences. This is exposed to the outside as a `ReadOnlyUserPref` objects.
 * does not depend on any of the other three components (as the `Model` represents data entities of the domain, they should make sense on their own without depending on other components)
 

docs/diagrams/BetterModelClassDiagram.puml

@@ -4,10 +4,14 @@ skinparam arrowThickness 1.1
 skinparam arrowColor MODEL_COLOR
 skinparam classBackgroundColor MODEL_COLOR
 
+AppointmentBook *-left-> "1" UniqueAppointmentList
+UniqueAppointmentList *-down-> "1" Appointment
+Appointment *-left-> "1" Person
+
 AddressBook *-right-> "1" UniquePersonList
 AddressBook *-right-> "1" UniqueTagList
 UniqueTagList -[hidden]down- UniquePersonList
-UniqueTagList -[hidden]down- UniquePersonList
+UniqueTagList -[hidden]down- UniqueTagList
 
 UniqueTagList -right-> "*" Tag
 UniquePersonList -right-> Person

docs/diagrams/ModelClassDiagram.puml

@@ -6,20 +6,27 @@ skinparam classBackgroundColor MODEL_COLOR
 
 Package Model as ModelPackage <<Rectangle>>{
 Class "<<interface>>\nReadOnlyAddressBook" as ReadOnlyAddressBook
+Class "<<interface>>\nReadOnlyAppointmentBook" as ReadOnlyAppointmentBook
 Class "<<interface>>\nReadOnlyUserPrefs" as ReadOnlyUserPrefs
 Class "<<interface>>\nModel" as Model
 Class AddressBook
+Class AppointmentBook
 Class ModelManager
 Class UserPrefs
 
 Class UniquePersonList
 Class Person
+Class PersonDescriptor
 Class Address
 Class Email
 Class Name
 Class Phone
 Class Tag
 
+Class UniqueAppointmentList
+Class Appointment
+Class AppointmentDescriptor
+
 Class I #FFFFFF
 }
 
@@ -29,20 +36,30 @@ HiddenOutside ..> Model
 AddressBook .up.|> ReadOnlyAddressBook
 
 ModelManager .up.|> Model
-Model .right.> ReadOnlyUserPrefs
+Model .down.> ReadOnlyUserPrefs
 Model .left.> ReadOnlyAddressBook
+Model .right.> ReadOnlyAppointmentBook
 ModelManager -left-> "1" AddressBook
-ModelManager -right-> "1" UserPrefs
+ModelManager -down-> "1" UserPrefs
+ModelManager -right-> "1" AppointmentBook
 UserPrefs .up.|> ReadOnlyUserPrefs
 
 AddressBook *--> "1" UniquePersonList
 UniquePersonList --> "~* all" Person
-Person *--> Name
-Person *--> Phone
-Person *--> Email
-Person *--> Address
-Person *--> "*" Tag
+Person *--> "1" PersonDescriptor
+PersonDescriptor *--> Name
+PersonDescriptor *--> Phone
+PersonDescriptor *--> Email
+PersonDescriptor *--> Address
+PersonDescriptor *--> "*" Tag
+
+AppointmentBook *--> "1" UniqueAppointmentList
+UniqueAppointmentList --> "~* all" Appointment
+Appointment *--> "1" AppointmentDescriptor
+AppointmentDescriptor *--> Person
 
+Appointment -[hidden]down--> I
+PersonDescriptor -[hidden]up--> I
 Person -[hidden]up--> I
 UniquePersonList -[hidden]right-> I
 
@@ -51,4 +68,5 @@ Phone -[hidden]right-> Address
 Address -[hidden]right-> Email
 
 ModelManager --> "~* filtered" Person
+ModelManager --> "~* filtered" Appointment
 @enduml