Implemented Search Functionality

src/main/java/com/libraryman_api/book/BookController.java

@@ -105,13 +105,18 @@ public void deleteBook(@PathVariable int id) {
 
     /**
      * Searches book based on title, author, genre, etc.
-     * 
+     * It uses a keyword parameter to filter the books, and pagination is applied to the search results.
+     * If no book is found it will return 204(No content found) http response.
+     * If keyword is null then it will return all books.
      * @param keyword the Keyword to search Book
      * @param pageable
      * @return
      */
-    @GetMapping("/search/{keyword}")
-    public Page<Book> searchBook(@PathVariable String keyword, @PageableDefault(page = 0, size = 5, sort = "title") Pageable pageable){
-    	return bookService.searchBook(keyword,pageable);
+    @GetMapping("/search")
+    public ResponseEntity<Page<Book>> searchBook(@RequestParam String keyword, @PageableDefault(page = 0, size = 5, sort = "title") Pageable pageable){
+    	Page<Book> books=bookService.searchBook(keyword,pageable);
+    	if(!books.isEmpty())
+    		return ResponseEntity.ok(books);
+    	return ResponseEntity.noContent().build();
     }
 }

src/main/java/com/libraryman_api/book/BookRepository.java

@@ -21,12 +21,12 @@ public interface BookRepository extends JpaRepository<Book, Integer> {
 	 */
 
 	@Query("SELECT b FROM Book b WHERE "
-			+ "b.title LIKE %:keyword% OR "
-			+ "b.author LIKE %:keyword% OR "
-			+ "b.publisher LIKE %:keyword% OR "
-			+ "b.genre LIKE %:keyword% OR "
-			+ "CAST(b.publishedYear As string) LIKE %:keyword% OR "
-			+ "CAST(b.copiesAvailable As string) LIKE %:keyword%")
+	        + "(LOWER(b.title) LIKE LOWER(CONCAT('%', :keyword, '%')) OR "
+	        + "LOWER(b.author) LIKE LOWER(CONCAT('%', :keyword, '%')) OR "
+	        + "LOWER(b.publisher) LIKE LOWER(CONCAT('%', :keyword, '%')) OR "
+	        + "LOWER(b.genre) LIKE LOWER(CONCAT('%', :keyword, '%')) OR "
+	        + "CAST(b.publishedYear AS string) LIKE %:keyword% OR "
+	        + "CAST(b.copiesAvailable AS string) LIKE %:keyword%)")
 	Page<Book> searchBook(@Param("keyword") String keyword,Pageable pageable);
 }