Add update/delete to the web-ui sample

Closes gh-4735
See gh-4733

spring-boot-samples/spring-boot-sample-web-ui/src/main/java/sample/web/ui/InMemoryMessageRepository.java

@@ -50,4 +50,9 @@ public class InMemoryMessageRepository implements MessageRepository {
 		return this.messages.get(id);
 	}
 
+	@Override
+	public void deleteMessage(Long id) {
+		this.messages.remove(id);
+	}
+
 }

spring-boot-samples/spring-boot-sample-web-ui/src/main/java/sample/web/ui/MessageRepository.java

@@ -24,4 +24,6 @@ public interface MessageRepository {
 
 	Message findMessage(Long id);
 
+	void deleteMessage(Long id);
+
 }

spring-boot-samples/spring-boot-sample-web-ui/src/main/java/sample/web/ui/mvc/MessageController.java

@@ -30,6 +30,7 @@ import org.springframework.web.servlet.mvc.support.RedirectAttributes;
 
 /**
  * @author Rob Winch
+ * @author Doo-Hwan Kwak
  */
 @Controller
 @RequestMapping("/")
@@ -73,4 +74,16 @@ public class MessageController {
 		throw new RuntimeException("Expected exception in controller");
 	}
 
+	@RequestMapping(value = "delete/{id}")
+	public ModelAndView delete(@PathVariable("id") Long id) {
+		this.messageRepository.deleteMessage(id);
+		Iterable<Message> messages = this.messageRepository.findAll();
+		return new ModelAndView("messages/list", "messages", messages);
+	}
+
+	@RequestMapping(value = "modify/{id}", method = RequestMethod.GET)
+	public ModelAndView modifyForm(@PathVariable("id") Message message) {
+		return new ModelAndView("messages/form", "message", message);
+	}
+
 }

spring-boot-samples/spring-boot-sample-web-ui/src/main/resources/templates/messages/form.html

@@ -26,6 +26,10 @@
             Messages
           </a>
         </div>
+        <input type="hidden"
+               th:field="*{id}"
+               th:class="${#fields.hasErrors('id')} ? 'field-error'"
+        />
         <label for="summary">Summary</label>
         <input type="text"
             th:field="*{summary}"
@@ -35,7 +39,7 @@
             th:field="*{text}"
             th:class="${#fields.hasErrors('text')} ? 'field-error'"></textarea>
         <div class="form-actions">
-          <input type="submit" value="Create"/>
+          <input type="submit" value="Save"/>
         </div>
       </form>
     </div>

spring-boot-samples/spring-boot-sample-web-ui/src/main/resources/templates/messages/view.html

@@ -37,6 +37,17 @@
           A detailed message that is longer than the summary.
         </dd>
       </dl>
+      <div class="pull-left">
+        <a href="messages"
+           th:href="@{'/delete/' + ${message.id}}">
+          delete
+        </a>
+        |
+        <a href="form.html"
+           th:href="@{'/modify/' + ${message.id}}">
+          modify
+        </a>
+      </div>
     </div>
   </body>
 </html>