[W5.11r][F14-B4] Liu Jianghao

src/seedu/addressbook/commands/Command.java

@@ -35,7 +35,16 @@ protected Command() {
     public static String getMessageForPersonListShownSummary(List<? extends ReadOnlyPerson> personsDisplayed) {
         return String.format(Messages.MESSAGE_PERSONS_LISTED_OVERVIEW, personsDisplayed.size());
     }
-
+    /**
+     *Constructs a feedback message to summarise an operation that displayed a sorted list of persons 
+     *
+     *@param sorted personsDisplayed used to generate summary
+     *@return summary message for sorted persons displayed
+     */
+    public static String getMessageForPersonSortShownSummary(List<? extends ReadOnlyPerson> personsDisplayed) {
+        return String.format(Messages.MESSAGE_PERSONS_SORTED_OVERVIEW, personsDisplayed.size());
+    }
+
     /**
      * Executes the command and returns the result.
      */

src/seedu/addressbook/commands/HelpCommand.java

@@ -16,6 +16,7 @@ public class HelpCommand extends Command {
             + "\n" + ClearCommand.MESSAGE_USAGE
             + "\n" + FindCommand.MESSAGE_USAGE
             + "\n" + ListCommand.MESSAGE_USAGE
+			+ "\n" + SortCommand.MESSAGE_USAGE
             + "\n" + ViewCommand.MESSAGE_USAGE
             + "\n" + ViewAllCommand.MESSAGE_USAGE
             + "\n" + HelpCommand.MESSAGE_USAGE

src/seedu/addressbook/commands/SortCommand.java

@@ -0,0 +1,27 @@
+package seedu.addressbook.commands;
+
+import seedu.addressbook.data.person.Name;
+import seedu.addressbook.data.person.ReadOnlyPerson;
+
+import java.util.List;
+
+
+/**
+ * Sort all persons in the address book to the user.
+ */
+public class SortCommand extends Command {
+
+    public static final String COMMAND_WORD = "sort";
+
+    public static final String MESSAGE_USAGE = COMMAND_WORD + ":\n" 
+            + "Displays all persons sorted by name alphabetically.\n\t"
+            + "Example: " + COMMAND_WORD;
+
+
+    @Override
+    public CommandResult execute() {
+    	 addressBook.sort();
+        List<ReadOnlyPerson> allPersons = addressBook.getAllPersons().immutableListView();
+        return new CommandResult(getMessageForPersonSortShownSummary(allPersons), allPersons);
+    }
+}

src/seedu/addressbook/common/Messages.java

@@ -9,6 +9,7 @@ public class Messages {
     public static final String MESSAGE_INVALID_PERSON_DISPLAYED_INDEX = "The person index provided is invalid";
     public static final String MESSAGE_PERSON_NOT_IN_ADDRESSBOOK = "Person could not be found in address book";
     public static final String MESSAGE_PERSONS_LISTED_OVERVIEW = "%1$d persons listed!";
+    public static final String MESSAGE_PERSONS_SORTED_OVERVIEW = "%1$d persons sorted!";
     public static final String MESSAGE_PROGRAM_LAUNCH_ARGS_USAGE = "Launch command format: " +
             "java seedu.addressbook.Main [STORAGE_FILE_PATH]";
     public static final String MESSAGE_WELCOME = "Welcome to your Address Book!";

src/seedu/addressbook/data/AddressBook.java

@@ -81,7 +81,12 @@ public void addPerson(Person toAdd) throws DuplicatePersonException {
         syncTagsWithMasterList(toAdd);
         allPersons.add(toAdd);
     }
-
+    /**
+     * Sort all persons by name in alphabectical order.
+     */
+    public void sort() {
+    	allPersons.sort();
+    }
     /**
      * Checks if an equivalent person exists in the address book.
      */

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

@@ -30,6 +30,7 @@ public static class PersonNotFoundException extends Exception {}
 
     private final List<Person> internalList = new ArrayList<>();
 
+
     /**
      * Constructs empty person list.
      */
@@ -106,6 +107,18 @@ public void remove(ReadOnlyPerson toRemove) throws PersonNotFoundException {
         }
     }
 
+    /**
+     * Sort all persons in alphabetical order
+     * 
+     */
+    public void sort() {
+    	internalList.sort(
+    			Comparator.comparing((Person p) -> p.getName().toString(),
+    					(p1,p2)->(p1.compareToIgnoreCase(p2)==0) ? p1.compareTo(p2): p1.compareToIgnoreCase(p2))
+    			);
+    }
+
+
     /**
      * Clears all persons in list.
      */

src/seedu/addressbook/parser/Parser.java

@@ -71,6 +71,9 @@ public Command parseCommand(String userInput) {
 
             case ListCommand.COMMAND_WORD:
                 return new ListCommand();
+
+			case SortCommand.COMMAND_WORD:
+                return new SortCommand();
 
             case ViewCommand.COMMAND_WORD:
                 return prepareView(arguments);