From 95ff3c9e89bcf11444d6e1407f0cb3c5307e1969 Mon Sep 17 00:00:00 2001
From: KrashKart <e1113755@u.nus.edu>
Date: Wed, 23 Oct 2024 00:23:04 +0800
Subject: [PATCH 1/2] Update UG with undo command description

---
 docs/UserGuide.md                                         | 8 ++++++++
 .../seedu/address/logic/parser/CampusConnectParser.java   | 6 +++---
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/docs/UserGuide.md b/docs/UserGuide.md
index b0512b02b54..97dbc91fb3b 100644
--- a/docs/UserGuide.md
+++ b/docs/UserGuide.md
@@ -175,6 +175,14 @@ Examples:
 Disallowed examples:
 * `deletetag 2 t/classmate t/neighbour` will not succeed as it tries to delete 2 tags at once.
 
+### Undo a command : `undo`
+
+Undoes the previous command and reverts CampusConnect.
+
+Format: `undo`
+
+* Reverts the state of CampusConnect to the one before the most recent command, if any.
+
 ### Clearing all entries : `clear`
 
 Clears all entries from the address book.
diff --git a/src/main/java/seedu/address/logic/parser/CampusConnectParser.java b/src/main/java/seedu/address/logic/parser/CampusConnectParser.java
index 5ffd5dcddb6..048c98a0596 100644
--- a/src/main/java/seedu/address/logic/parser/CampusConnectParser.java
+++ b/src/main/java/seedu/address/logic/parser/CampusConnectParser.java
@@ -78,13 +78,13 @@ public Command parseCommand(String userInput) throws ParseException {
 
         case HelpCommand.COMMAND_WORD:
             return new HelpCommand();
-            
+
         case DeleteTagCommand.COMMAND_WORD:
             return new DeleteTagCommandParser().parse(arguments);
-            
+
         case UndoCommand.COMMAND_WORD:
             return new UndoCommand();
-            
+
         default:
             logger.finer("This user input caused a ParseException: " + userInput);
             throw new ParseException(MESSAGE_UNKNOWN_COMMAND);

From 8c49d4a890dff5978bd3ddb39f1430ae1d0d52a3 Mon Sep 17 00:00:00 2001
From: KrashKart <e1113755@u.nus.edu>
Date: Wed, 23 Oct 2024 00:26:08 +0800
Subject: [PATCH 2/2] Update UML for undo command class

---
 docs/diagrams/CommandClasses.puml | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/docs/diagrams/CommandClasses.puml b/docs/diagrams/CommandClasses.puml
index 08aab7d0989..ab9e5075c90 100644
--- a/docs/diagrams/CommandClasses.puml
+++ b/docs/diagrams/CommandClasses.puml
@@ -13,6 +13,7 @@ package "Command Classes" as CommandClasses {
         Class "AddCommand" as AC
         Class "ClearCommand" as CC
         Class "DeleteCommand" as DC
+        Class "DeleteTagCommand" as DTC
         Class "EditCommand" as EdC
         Class "ExitCommand" as ExC
         Class "FindByEmailCommand" as FEC
@@ -21,7 +22,7 @@ package "Command Classes" as CommandClasses {
         Class "FindByPhoneCommand" as FPC
         Class "HelpCommand" as HC
         Class "ListCommand" as LC
-        Class "DeleteTagCommand" as DTC
+        Class "UndoCommand" as UC
     }
 }
 HiddenOutside ..> Command
@@ -43,9 +44,11 @@ FEC -[hidden]u- CC
 
 DC -u-|> Command
 DC -[hidden]right- EdC
-DTC -u-|> Command
 FEC -[hidden]u- DC
 
+DTC -u-|> Command
+FEC -[hidden]u- DTC
+
 EdC -u-|> Command
 EdC -[hidden]right- ExC
 FEC -[hidden]u- EdC
@@ -59,5 +62,9 @@ HC -[hidden]right- LC
 FEC -[hidden]u- HC
 
 LC -u-|> Command
+LC -[hidden]right UC
 FEC -[hidden]u- LC
+
+UC -u-|> Command
+FEC -[hidden]u- UC
 @enduml