create 3 child class to parent class, task class

docs/UserGuide.md

@@ -161,7 +161,7 @@ Format: `sort CATEGORY`
 
 Example:<br>
 * `sort A`
-* `Sort D`
+* `sort D`
 
 #### Reserving a time slot : `reserve`
 Reserves a time slot and prevents you from scheduling conflicting tasks.<br>
@@ -192,7 +192,7 @@ Exits the program.<br>
 Format: `exit`  
 
 #### Saving the data 
-Address book data are saved in the hard disk automatically after any command that changes the data.<br>
+Task Manager data are saved in the hard disk automatically after any command that changes the data.<br>
 There is no need to save manually.
 
 ## Command Cheatsheet
@@ -206,7 +206,7 @@ Search  | `search KEYWORD`
 Reserve | `reserve DATE, TIME`
 Edit    | `edit INDEX FIELD NEW_INFORMATION`
 List    | `list DATE`
-Undo    | `Uno`
+Undo    | `undo`
 Sort    | `sort CATEGORY`
 Help    | `help`
 Exit    | `exit`

src/main/java/seedu/ggist/model/task/DeadlineTask.java

@@ -0,0 +1,89 @@
+package seedu.ggist.model.task;
+
+import java.util.Objects;
+
+import seedu.ggist.commons.util.CollectionUtil;
+import seedu.ggist.model.tag.UniqueTagList;
+
+/**
+ * Represents a DeadlineTask in the address book.
+ * Guarantees: details are present and not null, field values are validated.
+ */
+public class DeadlineTask extends Task implements ReadOnlyTask {
+
+    private TaskName taskName;
+    private Date date;
+    private Time startTime;
+    private Time endTime;
+
+    private UniqueTagList tags;
+
+    /**
+     * Every field must be present and not null.
+     */
+    public DeadlineTask(TaskName taskName, Date date, Time endTime, UniqueTagList tags) {
+        this.taskName = taskName;
+        this.date = date;
+        this.startTime = null;
+        this.endTime = endTime;
+        this.tags = new UniqueTagList(tags); // protect internal tags from changes in the arg list
+    }
+
+    /**
+     * Copy constructor.
+     */
+    public DeadlineTask(ReadOnlyTask source) {
+        this(source.getTaskName(), source.getDate(), source.getEndTime(), source.getTags());
+    }
+
+    @Override
+    public TaskName getTaskName() {
+        return taskName;
+    }
+
+    @Override
+    public Date getDate() {
+        return date;
+    }
+
+    @Override
+    public Time getStartTime() {
+        return startTime;
+    }
+
+    @Override
+    public Time getEndTime() {
+        return endTime;
+    }
+
+    @Override
+    public UniqueTagList getTags() {
+        return new UniqueTagList(tags);
+    }
+
+    /**
+     * Replaces this person's tags with the tags in the argument tag list.
+     */
+    public void setTags(UniqueTagList replacement) {
+        tags.setTags(replacement);
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        return other == this // short circuit if same object
+                || (other instanceof ReadOnlyTask // instanceof handles nulls
+                && this.isSameStateAs((ReadOnlyTask) other));
+    }
+
+    @Override
+    public int hashCode() {
+        // use this method for custom fields hashing instead of implementing your own
+        return Objects.hash(taskName, date, startTime, endTime, tags);
+    }
+
+    @Override
+    public String toString() {
+        return getAsText();
+    }
+
+}

src/main/java/seedu/ggist/model/task/EventTask.java

@@ -0,0 +1,89 @@
+package seedu.ggist.model.task;
+
+import java.util.Objects;
+
+import seedu.ggist.commons.util.CollectionUtil;
+import seedu.ggist.model.tag.UniqueTagList;
+
+/**
+ * Represents a EventTask in the address book.
+ * Guarantees: details are present and not null, field values are validated.
+ */
+public class EventTask extends Task implements ReadOnlyTask {
+
+    private TaskName taskName;
+    private Date date;
+    private Time startTime;
+    private Time endTime;
+
+    private UniqueTagList tags;
+
+    /**
+     * Every field must be present and not null.
+     */
+    public EventTask(TaskName taskName, Date date, Time startTime, Time endTime, UniqueTagList tags) {
+        this.taskName = taskName;
+        this.date = date;
+        this.startTime = startTime;
+        this.endTime = endTime;
+        this.tags = new UniqueTagList(tags); // protect internal tags from changes in the arg list
+    }
+
+    /**
+     * Copy constructor.
+     */
+    public EventTask(ReadOnlyTask source) {
+        this(source.getTaskName(), source.getDate(), source.getStartTime(), source.getEndTime(), source.getTags());
+    }
+
+    @Override
+    public TaskName getTaskName() {
+        return taskName;
+    }
+
+    @Override
+    public Date getDate() {
+        return date;
+    }
+
+    @Override
+    public Time getStartTime() {
+        return startTime;
+    }
+
+    @Override
+    public Time getEndTime() {
+        return endTime;
+    }
+
+    @Override
+    public UniqueTagList getTags() {
+        return new UniqueTagList(tags);
+    }
+
+    /**
+     * Replaces this person's tags with the tags in the argument tag list.
+     */
+    public void setTags(UniqueTagList replacement) {
+        tags.setTags(replacement);
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        return other == this // short circuit if same object
+                || (other instanceof ReadOnlyTask // instanceof handles nulls
+                && this.isSameStateAs((ReadOnlyTask) other));
+    }
+
+    @Override
+    public int hashCode() {
+        // use this method for custom fields hashing instead of implementing your own
+        return Objects.hash(taskName, date, startTime, endTime, tags);
+    }
+
+    @Override
+    public String toString() {
+        return getAsText();
+    }
+
+}

src/main/java/seedu/ggist/model/task/FloatingTask.java

@@ -0,0 +1,89 @@
+package seedu.ggist.model.task;
+
+import java.util.Objects;
+
+import seedu.ggist.commons.util.CollectionUtil;
+import seedu.ggist.model.tag.UniqueTagList;
+
+/**
+ * Represents a FloatingTask in the address book.
+ * Guarantees: details are present and not null, field values are validated.
+ */
+public class FloatingTask extends Task implements ReadOnlyTask {
+
+    private TaskName taskName;
+    private Date date;
+    private Time startTime;
+    private Time endTime;
+
+    private UniqueTagList tags;
+
+    /**
+     * Every field must be present and not null.
+     */
+    public FloatingTask(TaskName taskName, UniqueTagList tags) {
+        this.taskName = taskName;
+        this.date = null;
+        this.startTime = null;
+        this.endTime = null;
+        this.tags = new UniqueTagList(tags); // protect internal tags from changes in the arg list
+    }
+
+    /**
+     * Copy constructor.
+     */
+    public FloatingTask(ReadOnlyTask source) {
+        this(source.getTaskName(), source.getTags());
+    }
+
+    @Override
+    public TaskName getTaskName() {
+        return taskName;
+    }
+
+    @Override
+    public Date getDate() {
+        return date;
+    }
+
+    @Override
+    public Time getStartTime() {
+        return startTime;
+    }
+
+    @Override
+    public Time getEndTime() {
+        return endTime;
+    }
+
+    @Override
+    public UniqueTagList getTags() {
+        return new UniqueTagList(tags);
+    }
+
+    /**
+     * Replaces this person's tags with the tags in the argument tag list.
+     */
+    public void setTags(UniqueTagList replacement) {
+        tags.setTags(replacement);
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        return other == this // short circuit if same object
+                || (other instanceof ReadOnlyTask // instanceof handles nulls
+                && this.isSameStateAs((ReadOnlyTask) other));
+    }
+
+    @Override
+    public int hashCode() {
+        // use this method for custom fields hashing instead of implementing your own
+        return Objects.hash(taskName, date, startTime, endTime, tags);
+    }
+
+    @Override
+    public String toString() {
+        return getAsText();
+    }
+
+}

src/main/java/seedu/ggist/model/task/GeneralTask.java

@@ -0,0 +1,92 @@
+package seedu.ggist.model.task;
+
+import java.util.Objects;
+
+import seedu.ggist.commons.util.CollectionUtil;
+import seedu.ggist.model.tag.UniqueTagList;
+
+/**
+ * Represents a Task in the address book.
+ * Guarantees: details are present and not null, field values are validated.
+ */
+public abstract class GeneralTask {
+
+    private TaskName name;
+    private UniqueTagList tags;
+
+    /**
+     * Every field must be present and not null.
+     */
+    public GeneralTask(TaskName taskName) {
+        this.taskName = taskName;
+        this.tags = new UniqueTagList(tags); // protect internal tags from changes in the arg list
+    }
+
+    /**
+     * Copy constructor.
+     */
+    public Task(ReadOnlyTask source) {
+        this(source.getTaskName(), source.getDate(), source.getStartTime(), source.getEndTime(), source.getPriority(), source.getFrequency(), source.getTags());
+    }
+
+    @Override
+    public TaskName getTaskName() {
+        return taskName;
+    }
+
+    @Override
+    public Date getDate() {
+        return date;
+    }
+
+    @Override
+    public Time getStartTime() {
+        return startTime;
+    }
+
+    @Override
+    public Time getEndTime() {
+        return endTime;
+    }
+
+    @Override
+    public Priority getPriority() {
+        return priority;
+    }
+
+    @Override
+    public Frequency getFrequency() {
+        return frequency;
+    }
+
+    @Override
+    public UniqueTagList getTags() {
+        return new UniqueTagList(tags);
+    }
+
+    /**
+     * Replaces this person's tags with the tags in the argument tag list.
+     */
+    public void setTags(UniqueTagList replacement) {
+        tags.setTags(replacement);
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        return other == this // short circuit if same object
+                || (other instanceof ReadOnlyTask // instanceof handles nulls
+                && this.isSameStateAs((ReadOnlyTask) other));
+    }
+
+    @Override
+    public int hashCode() {
+        // use this method for custom fields hashing instead of implementing your own
+        return Objects.hash(taksName, date, startTime, endTime, priority, frequency, tags);
+    }
+
+    @Override
+    public String toString() {
+        return getAsText();
+    }
+
+}