[FEATURE] Alert of new version

Related to issue #195

src/main/java/org/parabot/Landing.java

@@ -1,7 +1,6 @@
 package org.parabot;
 
 import org.parabot.api.translations.TranslationHelper;
-import org.parabot.core.Configuration;
 import org.parabot.core.Core;
 import org.parabot.core.Directories;
 import org.parabot.core.forum.AccountManager;
@@ -10,13 +9,10 @@ import org.parabot.core.network.proxy.ProxySocket;
 import org.parabot.core.network.proxy.ProxyType;
 import org.parabot.core.ui.BotUI;
 import org.parabot.core.ui.ServerSelector;
-import org.parabot.core.ui.utils.UILog;
 
 import javax.swing.*;
-import java.awt.*;
 import java.io.File;
 import java.io.IOException;
-import java.net.URI;
 
 /**
  * Parabot v2.6
@@ -46,9 +42,11 @@ public final class Landing {
         }
 
         if (!Core.inDebugMode() && Core.hasValidation() && !Core.isValid()) {
+            if (Core.newVersionAlert() == JOptionPane.YES_OPTION) {
                 Core.downloadNewVersion();
                 return;
             }
+        }
 
         Core.verbose(TranslationHelper.translate("VALIDATION_ACCOUNT_MANAGER"));
         AccountManager.validate();

src/main/java/org/parabot/core/Core.java

@@ -14,13 +14,11 @@ import java.io.BufferedReader;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
-import java.net.MalformedURLException;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.net.URLEncoder;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
-import java.util.Date;
 
 /**
  * The core of parabot
@@ -251,4 +249,11 @@ public class Core {
             return true;
         }
     }
+
+    /**
+     * Alerts the user that there is a new version
+     */
+    public static int newVersionAlert() {
+        return UILog.alert("Parabot Update", "There's a new version of Parabot! \nDo you wish to download it?\n\nThe current version could have some problems!", JOptionPane.YES_NO_OPTION, JOptionPane.WARNING_MESSAGE);
+    }
 }

src/main/java/org/parabot/core/ui/utils/UILog.java

@@ -1,13 +1,11 @@
 package org.parabot.core.ui.utils;
 
-import javax.swing.JOptionPane;
+import javax.swing.*;
 
 /**
- * 
  * Log messages to the log user interface which is attached to the bot user interface
  *
  * @author Everel
- *
  */
 public class UILog {
 
@@ -21,4 +19,15 @@ public class UILog {
                 messageType);
     }
 
+    public static int alert(final String title, final String message) {
+        alert(title, message, JOptionPane.YES_NO_OPTION);
+    }
+
+    public static int alert(final String title, final String message, int option) {
+        alert(title, message, option, JOptionPane.DEFAULT_OPTION);
+    }
+
+    public static int alert(final String title, final String message, int optionType, int messageType) {
+        JOptionPane.showConfirmDialog(null, message, title, optionType, messageType);
+    }
 }