Implement support for database edits, re-factor code

Signed-off-by: Pekka Helenius <fincer89@hotmail.com>

bookstore/src/main/java/com/fjordtek/bookstore/BookstoreApplication.java

@@ -25,14 +25,15 @@ public class BookstoreApplication extends SpringBootServletInitializer {
 	public CommandLineRunner bookDatabaseRunner(BookRepository repository) {
 		
 		return (args) -> {
-			commonLogger.info("Add new books to a database");
+			commonLogger.info("Add new sample books to database");
 		
 			repository.save(new Book("Book 1 title", "Book 1 author", 2020, "aaa-b2b-c3c-444", 40.00));
 			repository.save(new Book("Book 2 title", "Book 2 author", 2005, "111-2b2-3c3-ddd", 20.17));
 
-			commonLogger.info("New books in the database");
-			for (Book student : repository.findAll()) {
-				commonLogger.info(student.toString());
+			commonLogger.info("------------------------------");
+			commonLogger.info("Sample books in the database");
+			for (Book book : repository.findAll()) {
+				commonLogger.info(book.toString());
 			}
 
 		};

bookstore/src/main/java/com/fjordtek/bookstore/model/Book.java

@@ -66,7 +66,10 @@ public class Book {
 	
 	// TODO consider accessibility restrictions?
 	
-	// Id generated automatically
+	// NOTE: in default scenario, this is automatically generated
+	public void setId(long id) {
+		this.id = id;
+	}
 	
 	public void setTitle(String title) {
 		this.title = title;
@@ -93,7 +96,9 @@ public class Book {
 	
 	// TODO consider accessibility restrictions?
 	
-	// Id generated automatically
+	public long getId() {
+		return id;
+	}
 	
 	public String getTitle() {
 		return title;

bookstore/src/main/java/com/fjordtek/bookstore/model/BookRepository.java

@@ -6,8 +6,10 @@ import java.util.List;
 
 import org.springframework.data.repository.CrudRepository;
 
+
 public interface BookRepository extends CrudRepository<Book, Long> {
 
+	// Handles both INSERT and UPDATE queries
     List<Book> findById(String title);
-    
+
 }

bookstore/src/main/java/com/fjordtek/bookstore/web/BookController.java

@@ -4,31 +4,26 @@ package com.fjordtek.bookstore.web;
 
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.ModelAttribute;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
 import org.springframework.beans.factory.annotation.Autowired;
-//import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.http.HttpStatus;
 import org.springframework.web.bind.annotation.ResponseStatus;
 
-//import java.util.ArrayList;
-
 import javax.servlet.http.HttpServletRequest;
-//import javax.validation.Valid;
 
 import com.fjordtek.bookstore.model.*;
 
 @Controller
 public class BookController {
 
-	
-	
 	protected static final String landingPageURL      = "index";
 	protected static final String bookListPageURL     = "booklist";
 	protected static final String bookAddPageURL      = "bookadd";
 	protected static final String bookDeletePageURL   = "bookdelete";
-	protected static final String bookSavePageURL     = "booksave";
+	protected static final String bookEditPageURL     = "bookedit";
 
 	private HttpServerLogger     httpServerLogger     = new HttpServerLogger();
 	private HttpExceptionHandler httpExceptionHandler = new HttpExceptionHandler();
@@ -37,14 +32,14 @@ public class BookController {
 	private BookRepository       bookRepository;
 
  @RequestMapping(
-         value    = { bookListPageURL },
+         value    = bookListPageURL,
          method   = { RequestMethod.GET, RequestMethod.POST }
  )
  public String defaultWebFormGet(Model dataModel, HttpServletRequest requestData) {
 
      httpServerLogger.logMessageNormal(
              requestData,
-             "HTTPOK"
+             bookListPageURL + ": " + "HTTPOK"
      );
 
      dataModel.addAttribute("books", bookRepository.findAll());
@@ -53,6 +48,9 @@ public class BookController {
 
  }
 
+ //////////////////////////////
+ // ADD BOOK
+ 
  @RequestMapping(
 		 value    = bookAddPageURL,
 		 method   = { RequestMethod.GET, RequestMethod.PUT }
@@ -61,23 +59,23 @@ public class BookController {
 	 
      httpServerLogger.logMessageNormal(
              requestData,
-             "HTTPOK"
+             bookAddPageURL + ": " + "HTTPOK"
      );
 	 
 	 dataModel.addAttribute("book", new Book());
 	 
      return bookAddPageURL;
  }
- 
+
  @RequestMapping(
-		 value = bookSavePageURL,
+		 value = bookAddPageURL,
 		 method = RequestMethod.POST
  )
- public String webFormSaveBook(Book book, HttpServletRequest requestData) {
+ public String webFormSaveNewBook(Book book, HttpServletRequest requestData) {
 
      httpServerLogger.logMessageNormal(
              requestData,
-             "HTTPOK"
+             bookEditPageURL + ": " + "HTTPOK"
      );
 
      bookRepository.save(book);
@@ -85,27 +83,71 @@ public class BookController {
      return "redirect:" + bookListPageURL;
  }
  
+ //////////////////////////////
+ // DELETE BOOK
+ 
  @RequestMapping(
 		 value  = bookDeletePageURL + "/{id}",
 		 method = RequestMethod.GET
  )
  public String webFormDeleteBook(
 		 @PathVariable("id") long bookId,
-		 Model dataModel, HttpServletRequest requestData
-	) {
+		 HttpServletRequest requestData
+ ) {
 	 
      httpServerLogger.logMessageNormal(
              requestData,
-             "HTTPOK"
+             bookDeletePageURL + ": " + "HTTPOK"
      );
 	 
  	bookRepository.deleteById(bookId);
  	
     return "redirect:../" + bookListPageURL;
  }
+
+ //////////////////////////////
+ // UPDATE BOOK
+ 
+ @RequestMapping(
+		 value  = bookEditPageURL + "/{id}",
+		 method = RequestMethod.GET
+ )
+ public String webFormEditBook(
+		 @PathVariable("id") long bookId,
+		 Model dataModel, HttpServletRequest requestData
+ ) {
+	 
+     httpServerLogger.logMessageNormal(
+             requestData,
+             bookEditPageURL + ": " + "HTTPOK"
+     );
+
+    Book book = bookRepository.findById(bookId).get();
+    dataModel.addAttribute("book", book);
+
+    return bookEditPageURL;
+ }
+ 
+ @RequestMapping(
+		 value = bookEditPageURL + "/{id}",
+		 method = RequestMethod.POST
+ )
+ public String webFormUpdateBook(@ModelAttribute("book") Book book, HttpServletRequest requestData) {
+
+     httpServerLogger.logMessageNormal(
+             requestData,
+             bookEditPageURL + ": " + "HTTPOK"
+     );
+
+     bookRepository.save(book);
+     
+     return "redirect:../" + bookListPageURL;
+ }
+ 
  
+ //////////////////////////////
+ // REDIRECTS
  
- // Redirect
  @RequestMapping(
          value  = { "/", landingPageURL },
          method =  RequestMethod.GET

bookstore/src/main/resources/templates/bookadd.html

@@ -8,7 +8,7 @@
     <h1>Add new book</h1>
     <div>
     
-    	<form th:object="${book}" th:action="@{booksave}" action="#" method="post">
+    	<form th:object="${book}" th:action="@{bookadd}" action="#" method="post">
 
     		<div>
     			<label for="fname">Author</label>

bookstore/src/main/resources/templates/bookedit.html

@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<html lang="en" xmlns:th="http://www.thymeleaf.org">
+<head>
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+    <title>Update existing book</title>
+</head>
+<body>
+    <h1>Update existing book</h1>
+    <div>
+
+    	<form th:object="${book}" th:action="@{/bookedit/{id}(id=${book.id})}" action="#" method="post">
+
+    		<div>
+    			<label for="fname">Author</label>
+    			<input type="text" th:field="*{author}" />
+    		</div>
+    		<div>
+    			<label for="fname">Title</label>
+    			<input type="text" th:field="*{title}" />
+    		</div>
+    		<div>
+    			<label for="fname">ISBN</label>
+    			<input type="text" th:field="*{isbn}" />
+    		</div>
+    		<div>
+    			<label for="fname">Year</label>
+    			<input type="text" th:field="*{year}" />
+    		</div>
+    		<div>
+    			<label for="fname">Price</label>
+    			<input type="text" th:field="*{price}" />
+    		</div>
+    		
+    		<input type="submit" value="Update book"></input>
+    	</form>
+
+    </div>
+</body>
+</html>

bookstore/src/main/resources/templates/booklist.html

@@ -22,6 +22,9 @@
 			<td>
 				<a th:href="@{/bookdelete/{id}(id=${book.id})}">Delete</a>
 			</td>
+			<td>
+				<a th:href="@{/bookedit/{id}(id=${book.id})}">Edit</a>
+			</td>
 		</tr>
 	</table>
 	<div>