Add tag-related features

docs/DeveloperGuide.md

@@ -543,17 +543,22 @@ Priorities: High (must have) - `* * *`, Medium (nice to have) - `* *`, Low (unli
 
 **Extensions**
 
-* 1a. User inputs a non-alphanumeric tag.
+* 1a. User inputs incomplete data.
 
-    * 1a1. KeepInTouch shows a message indicating that tags should be alphanumeric.
+    * 1a1. KeepInTouch shows a message indicating incomplete data.
 
-      Use case resumes at step 1.
+      Use case ends.
 
-* 1b. User inputs a contact that does not exist.
+* 1b. User inputs a non-alphanumeric tag.
+    * 1b1. KeepInTouch shows a message indicating that tags should be alphanumeric.
+
+      Use case ends.
 
-    * 1b1. KeepInTouch shows a message indicating the contact cannot be found.
+* 1c. User inputs a contact that does not exist.
 
-      Use case resumes at step 1.
+    * 1c1. KeepInTouch shows a message indicating that the contact cannot be found.
+
+      Use case ends.
 
 **Use case: UC12 - Delete tags from a contact**
 
@@ -572,15 +577,14 @@ Priorities: High (must have) - `* * *`, Medium (nice to have) - `* *`, Low (unli
 
       Use case ends.
 
-* 1b. User inputs a contact that does not exist.
-
-    * 1b1. KeepInTouch shows a message indicating that the contact cannot be found.
+* 1b. User inputs a non-alphanumeric tag.
+    * 1b1. KeepInTouch shows a message indicating that tags should be alphanumeric.
 
       Use case ends.
 
-* 1c. User inputs a tag that does not exist.
+* 1c. User inputs a contact that does not exist.
 
-    * 1c1. KeepInTouch shows a message indicating that the tags cannot be found.
+    * 1c1. KeepInTouch shows a message indicating that the contact cannot be found.
 
       Use case ends.
 
@@ -600,7 +604,6 @@ Priorities: High (must have) - `* * *`, Medium (nice to have) - `* *`, Low (unli
     * 1a1. KeepInTouch shows a message indicating incomplete data.
 
       Use case ends.
-
 * 1b. User inputs a contact that does not exist.
 
     * 1b1. KeepInTouch shows a message indicating that the contact cannot be found.
@@ -609,7 +612,7 @@ Priorities: High (must have) - `* * *`, Medium (nice to have) - `* *`, Low (unli
 
 * 1c. User inputs a tag that does not exist.
 
-    * 1c1. KeepInTouch shows a message indicating that the tags cannot be found.
+    * 1c1. KeepInTouch shows a message indicating that the tag cannot be found.
 
       Use case ends.
 

docs/UserGuide.md

@@ -17,6 +17,8 @@ If you can type fast, KeepInTouch can get your contact management tasks done fas
   * [Adding a person: `add contact`](#adding-a-person--add-contact)
   * [Listing all persons: `list contact`](#listing-all-persons--list-contact)
   * [Deleting a person: `delete contact`](#deleting-a-person--delete-contact)
+  * [Adding tags: `add tag`](#adding-tags--add-tag)
+  * [Deleting tags: `delete tag`](#deleting-tags--delete-tag)
   * [Adding a note: `add note`](#adding-notes-to-a-contact--add-note)
   * [Listing all notes: `list notes`](#listing-all-notes--list-notes)
   * [Deleting a note: `delete note`](#deleting-a-note--delete-note)
@@ -71,6 +73,9 @@ If you can type fast, KeepInTouch can get your contact management tasks done fas
 
 * `CONTACT_ID` is the number that is on the left of the person's name in each person card.
 
+* Items with `…`​ after them can be used multiple times.<br>
+  e.g. `[-t TAGNAME]…​` can be used as `-t frontend`, `-t frontend -t java` etc.
+
 * Parameters can be in any order.<br>
   e.g. if the command specifies `-n NAME -t NOTE_TITLE`, `-t NOTE_TITLE -n NAME` is also acceptable.
 
@@ -117,6 +122,39 @@ Format: `delete contact NAME`
 Examples:
 * `list contact` followed by `delete contact Aaron` deletes the contact with the name Aaron.
 
+### Adding  tags : `add tag`
+
+Adds one or more tags to a contact.
+
+Format: `add tag -id CONTACT_ID -t TAGNAME...`
+
+* Adds one or more tags to a contact.
+* Duplicates are accepted but only unique tags will be added.
+
+Requirements:
+* `TAGNAME` must be alphanumeric, with no spaces.
+
+Examples:
+* `add tag -id 1 -t frontend` adds a tag with tag name "frontend" to the first contact in the contact list.
+* `add tag -id 1 -t frontend -t java` adds two tags with tag name "frontend" and "java" to the first contact in the contact list.
+
+
+### Deleting  tags : `delete tag`
+
+Deletes one or more tags to a contact. 
+
+Format: `delete tag -id CONTACT_ID -t TAGNAME...`
+
+* Deletes one or more tags to a contact, regardless if the tag exists in the contact or not.
+* Duplicates are accepted but only unique tags will be added.
+
+Requirements:
+* `TAGNAME` must be alphanumeric, with no spaces.
+
+Examples:
+* `delete tag -id 1 -t frontend` deletes a tag with tag name "frontend" from the first contact in the contact list.
+* `add tag -id 1 -t frontend -t java` deletes two tags with tag name "frontend" and "java" from the first contact in the contact list.
+
 ### Adding notes to a contact: `add note`
 
 Adds a note to a contact from the contact list.
@@ -232,6 +270,8 @@ Action             | Format, Examples
 **Add Contact**    | `add contact -n NAME -p PHONE_NUMBER -a ADDRESS -e EMAIL` <br> e.g., `add contact -n Aaron -p 12345678 -a Baker Street 12 -e [email protected]`
 **Delete Contact** | `delete contact NAME`<br> e.g., `delete contact Aaron`
 **List Contact**   | `list contact`
+**Add Tag**        | `add tag -id CONTACT_ID -t TAGNAME` <br> eg., `add tag -id 1 -t frontend`
+**Delete Tag**        | `delete tag -id CONTACT_ID -t TAGNAME` <br> eg., `delete tag -id 1 -t frontend`
 **Add Note**       | `add note -n NAME -t NOTE_TITLE -c NOTE_CONTENT` <br> e.g., `add note -n Daniel -t Open Position -e Applications for SWE full-time positions will open soon`
 **Delete Note**    | `delete note -n NAME -t NOTE_TITLE`<br> e.g., `delete note -n Aaron -t Meeting Topics`
 **List Notes**     | `list notes`

src/main/java/seedu/address/logic/commands/AddPersonCommand.java

@@ -5,6 +5,7 @@
 import static seedu.address.logic.parser.CliSyntax.PREFIX_EMAIL;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_NAME;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_PHONE;
+import static seedu.address.logic.parser.CliSyntax.PREFIX_TAG;
 
 import seedu.address.commons.util.ToStringBuilder;
 import seedu.address.logic.Messages;
@@ -26,12 +27,14 @@ public class AddPersonCommand extends AddCommand {
             + PREFIX_NAME + " NAME "
             + PREFIX_PHONE + " PHONE "
             + PREFIX_EMAIL + " EMAIL "
-            + PREFIX_ADDRESS + " ADDRESS" + "\n"
+            + PREFIX_ADDRESS + " ADDRESS "
+            + PREFIX_TAG + " TAGNAME" + "\n"
             + "Example: " + COMMAND_WORD + " " + SECONDARY_COMMAND_WORD
             + PREFIX_NAME + " John Doe "
             + PREFIX_PHONE + " 98765432 "
             + PREFIX_EMAIL + " [email protected] "
-            + PREFIX_ADDRESS + " 311, Clementi Ave 2, #02-25 ";
+            + PREFIX_ADDRESS + " 311, Clementi Ave 2, #02-25 "
+            + PREFIX_TAG + " frontend ";
 
     public static final String MESSAGE_SUCCESS = "New contact added: %1$s";
     public static final String MESSAGE_DUPLICATE_PERSON = "This contact already exists in the contact list";

src/main/java/seedu/address/logic/commands/AddTagCommand.java

@@ -0,0 +1,79 @@
+package seedu.address.logic.commands;
+
+import static java.util.Objects.requireNonNull;
+
+import java.util.Set;
+
+import seedu.address.commons.util.ToStringBuilder;
+import seedu.address.logic.commands.exceptions.CommandException;
+import seedu.address.model.Model;
+import seedu.address.model.person.ContactID;
+import seedu.address.model.person.Person;
+import seedu.address.model.tag.Tag;
+
+/**
+ * The command handler for {@code add tag} command
+ */
+public class AddTagCommand extends AddCommand {
+    public static final String SECONDARY_COMMAND_WORD = "tag";
+    public static final String MESSAGE_SUCCESS = "New tags added: ";
+
+    public static final String MESSAGE_USAGE = COMMAND_WORD + " " + SECONDARY_COMMAND_WORD
+            + ": Adds tags to a contact from the contact list.\n"
+            + "Usage:  add tag -id CONTACT_ID -t TAGNAME";
+    public static final String MESSAGE_PERSON_NOT_FOUND = "Can not find the target contact with ID: ";
+
+    private final Set<Tag> toAdd;
+    private final int contactId;
+
+    /**
+     * Creates an AddTagCommand to add the specified {@code Tag}(s).
+     */
+    public AddTagCommand(int contactId, Set<Tag> tagList) {
+        requireNonNull(tagList);
+        this.contactId = contactId;
+        this.toAdd = tagList;
+    }
+
+    @Override
+    public CommandResult execute(Model model) throws CommandException {
+        requireNonNull(model);
+        Person person = model.findPersonByUserFriendlyId(ContactID.fromInt(this.contactId));
+        if (person == null) {
+            throw new CommandException(MESSAGE_PERSON_NOT_FOUND + this.contactId);
+        }
+        person.addTags(this.toAdd);
+
+        final StringBuilder builder = new StringBuilder();
+        builder.append(MESSAGE_SUCCESS);
+        toAdd.forEach(builder::append);
+
+        return new CommandResult(builder.toString());
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        if (other == this) {
+            return true;
+        }
+
+        // instanceof handles nulls
+        if (!(other instanceof AddTagCommand)) {
+            return false;
+        }
+
+        AddTagCommand otherAddNoteCommand = (AddTagCommand) other;
+
+        boolean equalToAdd = toAdd.equals(otherAddNoteCommand.toAdd);
+        boolean equalContactId = (contactId == otherAddNoteCommand.contactId);
+        return equalToAdd && equalContactId;
+    }
+
+    @Override
+    public String toString() {
+        return new ToStringBuilder(this)
+                .add("toAdd", toAdd)
+                .add("contactId", contactId)
+                .toString();
+    }
+}

src/main/java/seedu/address/logic/commands/DeleteTagCommand.java

@@ -0,0 +1,78 @@
+package seedu.address.logic.commands;
+
+import static java.util.Objects.requireNonNull;
+
+import java.util.Set;
+
+import seedu.address.commons.util.ToStringBuilder;
+import seedu.address.logic.commands.exceptions.CommandException;
+import seedu.address.model.Model;
+import seedu.address.model.person.ContactID;
+import seedu.address.model.person.Person;
+import seedu.address.model.tag.Tag;
+
+/**
+ * The command handler for {@code delete tag} command
+ */
+public class DeleteTagCommand extends DeleteCommand {
+    public static final String SECONDARY_COMMAND_WORD = "tag";
+    public static final String MESSAGE_USAGE = COMMAND_WORD + " "
+            + SECONDARY_COMMAND_WORD + ": Delete one or more tags from a contact.\n"
+            + "Usage:  delete tag -id CONTACT_ID -t TAGNAME";
+    public static final String MESSAGE_PERSON_NOT_FOUND = "Can not find the target contact with ID: ";
+    public static final String MESSAGE_SUCCESS = "Successfully deleted tags: ";
+
+    private final Set<Tag> toDelete;
+    private final int contactId;
+
+    /**
+     * Creates an DeleteTagCommand to delete the specified {@code Tag}(s).
+     */
+    public DeleteTagCommand(int contactId, Set<Tag> tagList) {
+        requireNonNull(tagList);
+        this.contactId = contactId;
+        this.toDelete = tagList;
+    }
+
+    @Override
+    public CommandResult execute(Model model) throws CommandException {
+        requireNonNull(model);
+        Person person = model.findPersonByUserFriendlyId(ContactID.fromInt(this.contactId));
+        if (person == null) {
+            throw new CommandException(MESSAGE_PERSON_NOT_FOUND + this.contactId);
+        }
+        person.removeTags(toDelete);
+
+        final StringBuilder builder = new StringBuilder();
+        builder.append(MESSAGE_SUCCESS);
+        toDelete.forEach(builder::append);
+
+        return new CommandResult(builder.toString());
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        if (other == this) {
+            return true;
+        }
+
+        // instanceof handles nulls
+        if (!(other instanceof DeleteTagCommand)) {
+            return false;
+        }
+
+        DeleteTagCommand otherAddNoteCommand = (DeleteTagCommand) other;
+
+        boolean equalToDelete = toDelete.equals(otherAddNoteCommand.toDelete);
+        boolean equalContactId = (contactId == otherAddNoteCommand.contactId);
+        return equalToDelete && equalContactId;
+    }
+
+    @Override
+    public String toString() {
+        return new ToStringBuilder(this)
+                .add("toDelete", toDelete)
+                .add("contactId", contactId)
+                .toString();
+    }
+}

src/main/java/seedu/address/logic/parser/AddCommandParser.java

@@ -6,6 +6,7 @@
 import seedu.address.logic.commands.AddEventCommand;
 import seedu.address.logic.commands.AddNoteCommand;
 import seedu.address.logic.commands.AddPersonCommand;
+import seedu.address.logic.commands.AddTagCommand;
 import seedu.address.logic.parser.exceptions.ParseException;
 
 /**
@@ -24,6 +25,8 @@ public AddCommand parse(String userInput) throws ParseException {
             return new AddEventCommandParser().parse(args);
         case AddNoteCommand.SECONDARY_COMMAND_WORD:
             return new AddNoteCommandParser().parse(args);
+        case AddTagCommand.SECONDARY_COMMAND_WORD:
+            return new AddTagCommandParser().parse(args);
         default:
             throw new ParseException(MESSAGE_UNKNOWN_COMMAND);
         }

src/main/java/seedu/address/logic/parser/AddTagCommandParser.java

@@ -0,0 +1,41 @@
+package seedu.address.logic.parser;
+
+import static seedu.address.logic.Messages.MESSAGE_INVALID_COMMAND_FORMAT;
+import static seedu.address.logic.Messages.MESSAGE_INVALID_INTEGER_ARGUMENT;
+import static seedu.address.logic.parser.CliSyntax.PREFIX_PERSON_ID;
+import static seedu.address.logic.parser.CliSyntax.PREFIX_TAG;
+
+import java.util.Set;
+
+import seedu.address.logic.commands.AddTagCommand;
+import seedu.address.logic.parser.exceptions.ParseException;
+import seedu.address.model.tag.Tag;
+
+/**
+ * Parses input arguments and creates a new AddTagCommand object
+ */
+public class AddTagCommandParser implements Parser<AddTagCommand> {
+    @Override
+    public AddTagCommand parse(String args) throws ParseException {
+        ArgumentMultimap argMultimap = ArgumentTokenizer.tokenize(args, PREFIX_PERSON_ID,
+                PREFIX_TAG);
+
+        if (!ParserUtil.arePrefixesPresent(argMultimap, PREFIX_PERSON_ID, PREFIX_TAG)
+                || !argMultimap.getPreamble().isEmpty()) {
+            throw new ParseException(String.format(MESSAGE_INVALID_COMMAND_FORMAT, AddTagCommand.MESSAGE_USAGE));
+        }
+
+        argMultimap.verifyNoDuplicatePrefixesFor(PREFIX_PERSON_ID);
+
+        Set<Tag> tagList = ParserUtil.parseTags(argMultimap.getAllValues(PREFIX_TAG));
+
+        int contactId = -1;
+        try {
+            contactId = Integer.parseInt(argMultimap.getValue(PREFIX_PERSON_ID).get());
+        } catch (NumberFormatException e) {
+            throw new ParseException(String.format(MESSAGE_INVALID_INTEGER_ARGUMENT, e.getMessage()));
+        }
+
+        return new AddTagCommand(contactId, tagList);
+    }
+}

src/main/java/seedu/address/logic/parser/DeleteCommandParser.java

@@ -6,6 +6,7 @@
 import seedu.address.logic.commands.DeleteEventCommand;
 import seedu.address.logic.commands.DeleteNoteCommand;
 import seedu.address.logic.commands.DeletePersonCommand;
+import seedu.address.logic.commands.DeleteTagCommand;
 import seedu.address.logic.parser.exceptions.ParseException;
 
 /**
@@ -23,6 +24,8 @@ public DeleteCommand parse(String userInput) throws ParseException {
             return new DeleteNoteCommandParser().parse(args);
         case DeleteEventCommand.SECONDARY_COMMAND_WORD:
             return new DeleteEventCommandParser().parse(args);
+        case DeleteTagCommand.SECONDARY_COMMAND_WORD:
+            return new DeleteTagCommandParser().parse(args);
         default:
             throw new ParseException(MESSAGE_UNKNOWN_COMMAND);
         }