Added documentations for Book and BookFactory

docs/index.md

@@ -0,0 +1,42 @@
+# Documentations
+
+- [Book](#book)
+- [Book Factory](#book-factory)
+
+# Book
+
+## Constructors
+
+| Method | Description |
+|:-------|:------------|
+| Book(int id) | Create a book with a specific id |
+| Book(String title, int id) | Create a book with specific id and title |
+
+## Functions
+
+| Return | Method | Description |
+|:-------|:-------|:------------|
+| String | getTitle() | Returns the title of the book |
+| String | getStatus() | Returns the status of the book |
+| String | getId() | Returns the id of the book |
+| void | setTitle() | Set the title of the book |
+| boolean | rent(int[] dueDate) | Returns if the rent action is successful and set the due date to the given input |
+| void | returned() | Return the book |
+| double | overdueFine(int[] currentDay) | Calculate and return the amount of fine to be charged<br>(Fine rate is 0.25 per day; Max fine is 5) |
+
+# Book Factory
+
+## Constructors
+
+| Method | Description |
+|:-------|:------------|
+| BookFactory() | Creates an empty BookFactory |
+
+## Functions
+
+| Return | Method | Description |
+|:-------|:-------|:------------|
+| Book | newBook(String title) | Creates a new Book with the given title and returns it |
+| Book | getBook(int index) | Returns the book of the given index if it exist, else throw null pointer exception |
+| Book | getBook(String title) | Returns the book of the given title if it exist, else throw null pointer exception |
+| void | update(Book newbook) | Replaces the existing book of the same id with this new one |