docs: add add module timing implementation to dg

docs/DeveloperGuide.md

@@ -163,6 +163,21 @@ Classes used by multiple components are in the `seedu.addressbook.commons` packa
 
 This section describes some noteworthy details on how certain features are implemented.
 
+### Adding a ModuleTiming to a Student
+
+Adding a class to a student in ModContacts is done by the command `add_timing i/1 m/CS2103T d/Mon st/0800 et/1200`
+
+The entry point for this command is when the `LogicManager` parses the command, gets a `AddStudentModuleCommand`, 
+and then executes it.
+
+`AddStudentModuleCommand` performs some validations, then adds the `ModuleTiming` to the designated
+`Student` in the `FilteredStudentList` via `Model#addModuleTimingToStudent`.
+
+The following is the sequence diagram for this example.
+
+<img src="images/AddModuleTimingSequenceDiagram.png" />
+
+
 ### \[Proposed\] Undo/redo feature
 
 #### Proposed Implementation

docs/diagrams/AddModuleTimingSequenceDiagram.puml

@@ -0,0 +1,70 @@
+@startuml
+!include style.puml
+skinparam ArrowFontStyle plain
+
+box Logic LOGIC_COLOR_T1
+participant ":LogicManager" as LogicManager LOGIC_COLOR
+participant ":AddressBookParser" as AddressBookParser LOGIC_COLOR
+participant ":AddStudentModuleTimingCommandParser" as AddStudentModuleTimingCommandParser LOGIC_COLOR
+participant "d:AddStudentModuleTimingCommand" as AddStudentModuleTimingCommand LOGIC_COLOR
+participant "r:CommandResult" as CommandResult LOGIC_COLOR
+end box
+
+box Model MODEL_COLOR_T1
+participant "m:Model" as Model MODEL_COLOR
+end box
+
+[-> LogicManager : execute("add_timing i/1 m/CS2103T d/Mon st/0800 et/1200")
+activate LogicManager
+
+LogicManager -> AddressBookParser : parseCommand("add_timing i/1 m/CS2103T d/Mon st/0800 et/1200")
+activate AddressBookParser
+
+create AddStudentModuleTimingCommandParser
+AddressBookParser -> AddStudentModuleTimingCommandParser
+activate AddStudentModuleTimingCommandParser
+
+AddStudentModuleTimingCommandParser --> AddressBookParser
+deactivate AddStudentModuleTimingCommandParser
+
+AddressBookParser -> AddStudentModuleTimingCommandParser : parse("i/1 m/CS2103T d/Mon st/0800 et/1200")
+activate AddStudentModuleTimingCommandParser
+
+create AddStudentModuleTimingCommand
+AddStudentModuleTimingCommandParser -> AddStudentModuleTimingCommand
+activate AddStudentModuleTimingCommand
+
+AddStudentModuleTimingCommand --> AddStudentModuleTimingCommandParser :
+deactivate AddStudentModuleTimingCommand
+
+AddStudentModuleTimingCommandParser --> AddressBookParser : d
+deactivate AddStudentModuleTimingCommandParser
+'Hidden arrow to position the destroy marker below the end of the activation bar.
+AddStudentModuleTimingCommandParser -[hidden]-> AddressBookParser
+destroy AddStudentModuleTimingCommandParser
+
+AddressBookParser --> LogicManager : d
+deactivate AddressBookParser
+
+LogicManager -> AddStudentModuleTimingCommand : execute(m)
+activate AddStudentModuleTimingCommand
+
+AddStudentModuleTimingCommand -> Model : addModuleTimingToStudent(moduleTiming, studentToModify)
+activate Model
+
+Model --> AddStudentModuleTimingCommand
+deactivate Model
+
+create CommandResult
+AddStudentModuleTimingCommand -> CommandResult
+activate CommandResult
+
+CommandResult --> AddStudentModuleTimingCommand
+deactivate CommandResult
+
+AddStudentModuleTimingCommand --> LogicManager : r
+deactivate AddStudentModuleTimingCommand
+
+[<--LogicManager
+deactivate LogicManager
+@enduml