Update List feature in DG with sequence diagram

docs/DeveloperGuide.md

@@ -104,13 +104,18 @@ The following sequence diagram illustrates the sequence of interactions involved
 ![](./uml/uml-images/processEditTransactionDiagram.png)
 
 ### [Implemented] List feature
+### Description
+The list feature allows users to view their existing transactions. This feature includes viewing all the transactions, 
+past week's transactions, past month's transactions and transactions from a specified date range.
+
 #### Implementation
-The list feature in the BudgetBuddy application allows users to view all their past transactions. This feature is
-facilitated through the `UserInterface#printAllTransactions`, which loops through the entire ArrayList of transactions
-and extract all the details of each transaction.
+This feature is facilitated through the `TransactionList#processList`, where it prompts the user for their choice of
+list they wish to see. After the user inputs the choice, the get functions will store the transactions in a new
+ArrayList and `UserInterface#printPastTransactions` will handle the output of the list.
 
-This feature will be further enhanced to include options to view transactions that the user is interested in only. For
-example, transactions of the past week, past month, specified date range.
+Sequence Diagram
+The following sequence diagram illustrates the sequence of interactions involved in the editing of a transaction:
+![](./uml/uml-images/processList.png)
 
 ## Product scope
 ### Target user profile

docs/uml/uml-images/processList.puml

@@ -0,0 +1,61 @@
+@startuml
+'https://plantuml.com/sequence-diagram
+
+autonumber
+
+actor User
+participant "TransactionManager" as TM
+participant "UserInterface" as UI
+participant "LocalDate" as LD
+
+User -> TM: processList()
+TM -> UI: printListOptions()
+activate UI
+UI --> User: Display list options
+deactivate UI
+User -> TM: selectOption(option)
+TM -> TM: determineAction(option)
+
+alt Option 1 (All Transactions)
+    TM -> TM: printTransactions()
+    TM -> UI: printTransactions()
+    activate UI
+    UI --> User: Display all transactions
+    deactivate UI
+else Option 2 (Past Week Transactions)
+    TM -> LD: now()
+    activate LD
+    LD --> TM: today
+    deactivate LD
+    TM -> TM: calculateStartDate("week")
+    TM -> TM: filterTransactions(startDate)
+    TM -> UI: printPastTransactions(transactions, "week")
+    activate UI
+    UI --> User: Display past week transactions
+    deactivate UI
+else Option 3 (Past Month Transactions)
+    TM -> LD: now()
+    LD --> TM: today
+    TM -> TM: calculateStartDate("month")
+    TM -> TM: filterTransactions(startDate)
+    TM -> UI: printPastTransactions(transactions, "month")
+    activate UI
+    UI --> User: Display past month transactions
+    deactivate UI
+else Option 4 (Custom Date Transactions)
+    TM -> UI: getStartDate()
+    activate UI
+    UI --> TM: startDate
+    deactivate UI
+    TM -> UI: getEndDate()
+    activate UI
+    UI --> TM: endDate
+    deactivate UI
+    TM -> TM: parseDates(startDate, endDate)
+    TM -> TM: filterTransactions(startDate, endDate)
+    TM -> UI: printCustomDateTransactions(transactions)
+    activate UI
+    UI --> User: Display custom date transactions
+    deactivate UI
+end
+@enduml