[W5.7][F11-1]Wu Jiacheng

docs/UserGuide.adoc

@@ -111,6 +111,11 @@ Deletes the 2nd person in the address book.
 `delete 1` +
 Deletes the 1st person in the results of the `find` command.
 
+== Display total number of persons in address book : `total`
+
+Shows the total number of persons in the address book. +
+Format: `list`
+
 == View non-private details of a person : `view`
 
 Displays the non-private details of the specified person. +

src/seedu/addressbook/commands/TotalCommand.java

@@ -0,0 +1,21 @@
+package seedu.addressbook.commands;
+
+/**
+ * display the total number of persons stored in the address book
+ */
+public class TotalCommand extends Command {
+
+    public static final String COMMAND_WORD = "total";
+
+    public static final String MESSAGE_USAGE = COMMAND_WORD
+            + ": display the total number of persons stored in the address book.\n"
+            + "Example: " + COMMAND_WORD;
+
+    public static final String MESSAGE_TOTAL_IN_ADDRESSBOOK = "There is/are %1$s person(s) in the address book";
+
+    @Override
+    public CommandResult execute() {
+        return new CommandResult(String.format(MESSAGE_TOTAL_IN_ADDRESSBOOK, addressBook.getTotal()));
+    }
+
+}

src/seedu/addressbook/data/AddressBook.java

@@ -54,6 +54,11 @@ public void removePerson(ReadOnlyPerson toRemove) throws PersonNotFoundException
         allPersons.remove(toRemove);
     }
 
+    /**
+     * Gets total number of persons in list.
+     */
+    public int getTotal()  { return allPersons.getSize(); }
+
     /**
      * Clears all persons and tags from the address book.
      */

src/seedu/addressbook/data/person/UniquePersonList.java

@@ -122,6 +122,11 @@ public void remove(ReadOnlyPerson toRemove) throws PersonNotFoundException {
         }
     }
 
+    /**
+     * Gets total number of persons in list.
+     */
+    public int getSize()  { return internalList.size(); }
+
     /**
      * Clears all persons in list.
      */

src/seedu/addressbook/parser/Parser.java

@@ -20,6 +20,7 @@
 import seedu.addressbook.commands.HelpCommand;
 import seedu.addressbook.commands.IncorrectCommand;
 import seedu.addressbook.commands.ListCommand;
+import seedu.addressbook.commands.TotalCommand;
 import seedu.addressbook.commands.ViewAllCommand;
 import seedu.addressbook.commands.ViewCommand;
 import seedu.addressbook.data.exception.IllegalValueException;
@@ -79,6 +80,9 @@ public Command parseCommand(String userInput) {
         case DeleteCommand.COMMAND_WORD:
             return prepareDelete(arguments);
 
+        case TotalCommand.COMMAND_WORD:
+            return new TotalCommand();
+
         case ClearCommand.COMMAND_WORD:
             return new ClearCommand();
 

test/expected.txt

@@ -290,6 +290,21 @@
 || 
 || 2 persons listed!
 || ===================================================
+|| Enter command: || [Command entered:  list]
+|| 	1. Betsy Choo Tags: [secretive]
+|| 	2. Dickson Ee Phone: 444444 Address: 444, delta street Tags: [friends]
+|| 
+|| 2 persons listed!
+|| ===================================================
+|| Enter command: || [Command entered:  total]
+|| There is/are 2 person(s) in the address book
+|| ===================================================
+|| Enter command: || [Command entered:  delete 1]
+|| Deleted Person: Betsy Choo Phone: (private) 222222 Email: (private) [email protected] Address: (private) 222, beta street Tags: [secretive]
+|| ===================================================
+|| Enter command: || [Command entered:  total]
+|| There is/are 1 person(s) in the address book
+|| ===================================================
 || Enter command: || [Command entered:  clear]
 || Address book has been cleared!
 || ===================================================

test/input.txt

@@ -140,6 +140,18 @@
   delete 1
   list
 
+##########################################################
+ # test total command
+##########################################################
+
+  # list all persons in address book and compare
+  list
+  total
+
+  # add 1 person and test again
+  delete 1
+  total
+
 ##########################################################
 # test clear command
 ##########################################################