Commit 2ce4bae

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writing "random book" functionality

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Lines changed: 6 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -26,8 +26,13 @@ public List<Book> findAllByCategory(@PathVariable int id_category) {`
`26`	`26`	`return dao.findAllByCategory(id_category);`
`27`	`27`	`}`
`28`	`28`
	`29`	`+ @GetMapping("/random")`
	`30`	`+ public Optional<Book> findRandomBook(@RequestParam(value = "category", defaultValue = "0") int id_category) {`
	`31`	`+ return dao.findRandomBook(id_category);`
	`32`	`+ }`
	`33`	`+`
`29`	`34`	`@GetMapping("/{id}")`
`30`		`- public Optional<Book> findOne(@PathVariable int id) {`
	`35`	`+ public Optional<Book> findById(@PathVariable int id) {`
`31`	`36`	`return dao.findById(id);`
`32`	`37`	`}`
`33`	`38`

Lines changed: 1 addition & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -7,6 +7,7 @@ public interface BookDAO {`
`7`	`7`	`Optional<Book> findById(int id);`
`8`	`8`	`List<Book> findAll();`
`9`	`9`	`List<Book> findAllByCategory(int id_category);`
	`10`	`+ Optional<Book> findRandomBook(int id_category);`
`10`	`11`	`Book create(Book book);`
`11`	`12`	`Book update(Book book, int id);`
`12`	`13`	`void delete(int id_book);`

Lines changed: 13 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -51,6 +51,19 @@ public List<Book> findAllByCategory(int id_category) {`
`51`	`51`	`return jdbcTemplate.query(sql, rowMapper, id_category);`
`52`	`52`	`}`
`53`	`53`
	`54`	`+ @Override`
	`55`	`+ public Optional<Book> findRandomBook(int id_category) {`
	`56`	`+ List<Book> books;`
	`57`	`+ if (id_category > 0) {`
	`58`	`+ books = findAllByCategory(id_category);`
	`59`	`+ } else {`
	`60`	`+ books = findAll();`
	`61`	`+ }`
	`62`	`+ // generating the index using Math.random()`
	`63`	`+ int index = (int)(Math.random() * books.size());`
	`64`	`+ return Optional.of(books.get(index));`
	`65`	`+ }`
	`66`	`+`
`54`	`67`	`@Override`
`55`	`68`	`public Book create(Book book) {`
`56`	`69`	`Map<String,Object> parameters = new HashMap<>();`

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