show the dialog to upgrade data loader if newer version is available

Based on the ask at https://ideas.salesforce.com/s/idea/a0B8W00000GdVkgUAF/data-loader-upgrade-option-should-be-there-in-the-application-itself

- show the dialog with the link to Data Loader download page if a newer version is available for download.

pom.xml

@@ -4,7 +4,7 @@
   <groupId>com.force</groupId>
   <artifactId>dataloader</artifactId>
   <packaging>jar</packaging>
-  <version>59.0.0</version>
+  <version>59.0.1</version>
   <name>Salesforce Data Loader</name>
   <url>https://github.com/forcedotcom/dataloader</url>
   <organization>

src/main/java/com/salesforce/dataloader/ui/LoaderDownloadDialog.java

@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 2015, salesforce.com, inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are permitted provided
+ * that the following conditions are met:
+ *
+ *    Redistributions of source code must retain the above copyright notice, this list of conditions and the
+ *    following disclaimer.
+ *
+ *    Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
+ *    the following disclaimer in the documentation and/or other materials provided with the distribution.
+ *
+ *    Neither the name of salesforce.com, inc. nor the names of its contributors may be used to endorse or
+ *    promote products derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package com.salesforce.dataloader.ui;
+
+import org.eclipse.jface.dialogs.IDialogConstants;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.events.SelectionAdapter;
+import org.eclipse.swt.events.SelectionEvent;
+import org.eclipse.swt.widgets.*;
+
+import com.salesforce.dataloader.util.AppUtil;
+
+/**
+ * Splash screen for the loader.
+ * 
+ * @author Lexi Viripaeff
+ * @since 6.0
+ */
+public class LoaderDownloadDialog extends LoaderTitleAreaDialog {
+
+
+    /**
+     * MyTitleAreaDialog constructor
+     * 
+     * @param shell
+     *            the parent shell
+     */
+    public LoaderDownloadDialog(Shell activeShell) {
+        super(activeShell);
+    }
+
+    /**
+     * Creates the dialog's contents
+     * 
+     * @param parent
+     *            the parent composite
+     * @return Control
+     */
+    @Override
+    protected Control createContents(Composite parent) {
+        Control contents = super.createContents(parent);
+
+        // Set the title
+        setTitle(Labels.getString("LoaderDownloadDialog.title")); //$NON-NLS-1$
+
+        // Set the message
+        setMessage(Labels.getFormattedString("LoaderDownloadDialog.messageLineOne", 
+                new String[] {AppUtil.getLatestDownloadableDataLoaderVersion(),
+                AppUtil.DATALOADER_DOWNLOAD_URL})); //$NON-NLS-1$
+
+        // Set the image
+        setTitleImage(UIUtils.getImageRegistry().get("splashscreens")); //$NON-NLS-1$
+
+        return contents;
+    }
+
+    /**
+     * Creates the gray area
+     * 
+     * @param parent
+     *            the parent composite
+     * @return Control
+     */
+    @Override
+    protected Control createDialogArea(Composite parent) {
+        Composite composite = (Composite)super.createDialogArea(parent);
+
+        return composite;
+    }
+
+    /**
+     * Creates the buttons for the button bar
+     * 
+     * @param parent
+     *            the parent composite
+     */
+    @Override
+    protected void createButtonsForButtonBar(Composite parent) {
+        // create all the buttons, in order
+
+        createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL, true);
+    }
+
+    /**
+     * Sets the button behavior
+     */
+    @Override
+    protected void buttonPressed(int buttonID) {
+        setReturnCode(buttonID);
+        close();
+    }
+}

src/main/java/com/salesforce/dataloader/ui/LoaderTitleAreaDialog.java

@@ -31,6 +31,8 @@
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.DisposeEvent;
 import org.eclipse.swt.events.DisposeListener;
+import org.eclipse.swt.events.SelectionAdapter;
+import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.graphics.*;
 import org.eclipse.swt.layout.*;
 import org.eclipse.swt.widgets.*;
@@ -83,7 +85,7 @@ public static Image getImageFromRegistry(String imgKey) {
     Color titleAreaColor;
     private String message = ""; //$NON-NLS-1$
     private String errorMessage;
-    private Text messageLabel;
+    private Link messageLabel;
     private Composite workArea;
     private Label messageImageLabel;
     private Image messageImage;
@@ -233,7 +235,7 @@ public void widgetDisposed(DisposeEvent e) {
         messageImageLabel.setBackground(background);
 
         // Message label @ bottom, center
-        messageLabel = new Text(parent, SWT.WRAP | SWT.READ_ONLY);
+        messageLabel = new Link(parent, SWT.WRAP | SWT.READ_ONLY);
         JFaceColors.setColors(messageLabel, foreground, background);
         messageLabel.setText(" \n "); // two lines//$NON-NLS-1$
         messageLabel.setFont(JFaceResources.getDialogFont());
@@ -517,6 +519,12 @@ private void updateMessage(String newMessage) {
         if (newMessage != null && newMessage.indexOf('\n') == -1)
             newMessage = newMessage + "\n "; //$NON-NLS-1$
         messageLabel.setText(newMessage);
+        messageLabel.addSelectionListener(new SelectionAdapter() {
+            @Override
+            public void widgetSelected(SelectionEvent e) {
+                UIUtils.openURL(e.text);
+            }
+          });
     }
     /**
      * Sets the title to be shown in the title area of this dialog.

src/main/java/com/salesforce/dataloader/ui/LoaderWindow.java

@@ -47,6 +47,7 @@
 import com.salesforce.dataloader.config.Config.ConfigListener;
 import com.salesforce.dataloader.controller.Controller;
 import com.salesforce.dataloader.ui.uiActions.*;
+import com.salesforce.dataloader.util.AppUtil;
 
 /**
  * The main class for the Loader UI.
@@ -199,7 +200,8 @@ protected Control createContents(Composite parent) {
         if (!config.getBoolean(Config.HIDE_WELCOME_SCREEN)) {
             displayTitleDialog(Display.getDefault(), this.operationActionsByIndex, this.controller.getConfig());
         }
-
+        displayUpgradeDialog(Display.getDefault());
+
         comp.pack();
         parent.pack();
 
@@ -284,6 +286,19 @@ public void run() {
             }
         });
     }
+
+    private void displayUpgradeDialog(final Display display) {
+        if (AppUtil.DATALOADER_VERSION.equals(AppUtil.getLatestDownloadableDataLoaderVersion())) {
+            return; // running app's version matches with downloadable version.
+        }
+        display.asyncExec(new Thread() {
+            @Override
+            public void run() {
+                LoaderDownloadDialog dlg = new LoaderDownloadDialog(display.getActiveShell());
+                int result = dlg.open();
+            }
+        });
+    }
 
     /**
      * Creates the menu for the application

src/main/java/com/salesforce/dataloader/ui/OAuthLoginFromBrowserFlow.java

@@ -163,7 +163,7 @@ public boolean open() throws UnsupportedEncodingException {
         link.addSelectionListener(new SelectionAdapter() {
             @Override
             public void widgetSelected(SelectionEvent e) {
-            	loginRunner.openURL(e.text);
+            	UIUtils.openURL(e.text);
             }
           });
         final Clipboard clipboard = new Clipboard(display);

src/main/java/com/salesforce/dataloader/ui/UIUtils.java

@@ -27,7 +27,10 @@
 package com.salesforce.dataloader.ui;
 
 import com.salesforce.dataloader.action.OperationInfo;
+import com.salesforce.dataloader.util.AppUtil;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.eclipse.jface.resource.ImageDescriptor;
 import org.eclipse.jface.resource.ImageRegistry;
 import org.eclipse.swt.SWT;
@@ -37,13 +40,16 @@
 import org.eclipse.swt.widgets.MessageBox;
 import org.eclipse.swt.widgets.Shell;
 
+import java.awt.Desktop;
+import java.io.IOException;
 import java.net.URI;
 import java.net.URL;
 import java.util.Arrays;
 import java.util.List;
 
 public class UIUtils {
     private static ImageRegistry image_registry;
+    private static Logger logger = LogManager.getLogger(AppUtil.class);
 
     public static boolean isValidHttpsUrl(String url) {
         try {
@@ -135,4 +141,61 @@ public static String[] setComboItems(Combo combo, List<String> itemList, String
         }
         return itemArray;
     }
+
+
+    public static void openURL(String url) {
+        if (Desktop.isDesktopSupported()) {
+            Desktop desktop = Desktop.getDesktop();
+            try {
+                logger.debug("trying to use desktop.browse() method");
+                desktop.browse(new URI(url));
+            } catch (Exception e) {
+                logger.debug(e.getMessage());
+                openURLUsingNativeCommand(url);
+            }
+        } else {
+            logger.debug("trying to use native command");
+            openURLUsingNativeCommand(url);
+        }
+    }
+
+    private static void openURLUsingNativeCommand(String url) {
+        Runtime runtime = Runtime.getRuntime();
+        String osName = System.getProperty("os.name");
+        try {
+            if (osName.toLowerCase().indexOf("mac") >= 0) {
+                logger.debug("trying to use open command on mac");
+                runtime.exec("open " + url);
+            }
+            else if (osName.toLowerCase().indexOf("win") >= 0) {
+                logger.debug("trying to use rundll32 command on windows");
+                runtime.exec("rundll32 url.dll,FileProtocolHandler " + url);
+            } else { //assume Unix or Linux
+                try {
+                    logger.debug("trying to use xdg-open command on linux");
+                    runtime.exec("xdg-open " + url);
+                } catch (IOException e) {
+                    logger.debug(e.getMessage());
+                    logger.debug("trying to browser-specific command on linux");
+                    String[] browsers = {
+                            "firefox", "chrome", "opera", "konqueror", "epiphany", "mozilla", "netscape" };
+                    String browser = null;
+                    for (int count = 0; count < browsers.length && browser == null; count++)
+                        if (runtime.exec(
+                                new String[] {"which", browsers[count]}).waitFor() == 0) {
+                            browser = browsers[count];
+                        }
+                    if (browser == null) {
+                        throw new Exception("Could not find web browser");
+                    } else {
+                        runtime.exec(new String[] {browser, url});
+                    }
+                }
+            }
+        }
+        catch (Exception e) {
+            logger.error(e.getMessage());
+        }
+    }
+
 }

src/main/java/com/salesforce/dataloader/util/AppUtil.java

@@ -32,8 +32,16 @@
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.UnsupportedEncodingException;
+import java.net.HttpURLConnection;
+import java.net.ProxySelector;
+import java.net.URI;
 import java.net.URISyntaxException;
 import java.net.URLDecoder;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpRequest.Builder;
+import java.net.http.HttpResponse;
+import java.net.http.HttpResponse.BodyHandlers;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Paths;
@@ -45,6 +53,8 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Properties;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 
 import javax.xml.parsers.FactoryConfigurationError;
 
@@ -54,7 +64,7 @@
 import com.salesforce.dataloader.config.Config;
 import com.salesforce.dataloader.config.Messages;
 import com.salesforce.dataloader.exception.ConfigInitializationException;
-import com.salesforce.dataloader.ui.Labels;
+
 
 /**
  * com.salesforce.dataloader.util
@@ -87,9 +97,11 @@ public enum APP_RUN_MODE {
     public static final String CLI_OPTION_SWT_NATIVE_LIB_IN_JAVA_LIB_PATH = "swt.nativelib.inpath";
     public static final String CLI_OPTION_CONFIG_DIR_PROP = "salesforce.config.dir";
     public static final String CONFIG_DIR_DEFAULT_VALUE = "configs";
+    public static final String DATALOADER_DOWNLOAD_URL = "https://developer.salesforce.com/tools/data-loader";
 
     private static APP_RUN_MODE appRunMode = APP_RUN_MODE.UI;
     private static Logger logger = null;
+    private static String latestDownloadableDataLoaderVersion;
 
     static {
         Properties versionProps = new Properties();
@@ -113,9 +125,14 @@ public static String[] initializeAppConfig(String[] args) throws FactoryConfigur
         LoggingUtil.initializeLog(argsMap);
         logger = LogManager.getLogger(AppUtil.class);
         setUseGMTForDateFieldValue(argsMap);
+        latestDownloadableDataLoaderVersion = _getLatestAvailableAppVersionFromWebsite();
         return convertCommandArgsMapToArgsArray(argsMap);
     }
 
+    public static String getLatestDownloadableDataLoaderVersion() {
+        return latestDownloadableDataLoaderVersion;
+    }
+
     public static OSType getOSType() throws SecurityException {
         String osName = System.getProperty(OS_NAME);
 
@@ -415,4 +432,34 @@ public static int exec(List<String> command, String exceptionMessage) {
         }
         return exitVal;
     }
+
+    private static final String DL_DOWNLOADABLE_REGEX = "[0-9]+\\.[0-9]+\\.[0-9]+\\.zip";
+    private static String _getLatestAvailableAppVersionFromWebsite() {
+        try {
+            Builder requestBuilder = HttpRequest.newBuilder(new URI(DATALOADER_DOWNLOAD_URL));
+            HttpRequest request = requestBuilder.GET().build();
+            HttpClient client = HttpClient.newBuilder()
+                    .followRedirects(HttpClient.Redirect.ALWAYS)
+                    .proxy(ProxySelector.getDefault())
+                    .build();
+            HttpResponse<String> response = client.send(request, BodyHandlers.ofString());
+            if (response.statusCode() != HttpURLConnection.HTTP_OK) {
+                logger.info("Unable to check for the latest available data loader version. Response code = " + response.statusCode());
+                return DATALOADER_VERSION;
+            }
+            String responseContent = response.body();
+
+            Pattern htmlTagInRichTextPattern = Pattern.compile(DL_DOWNLOADABLE_REGEX);
+            Matcher matcher = htmlTagInRichTextPattern.matcher(responseContent);
+            String downloadableVersion = DATALOADER_VERSION;
+            if (matcher.find()) {
+                downloadableVersion = matcher.group();
+                downloadableVersion = downloadableVersion.substring(0, downloadableVersion.lastIndexOf("."));
+            }
+            return downloadableVersion;
+        } catch (Exception e) {
+            logger.info("Unable to check for the latest available data loader version: " + e.getMessage());
+            return DATALOADER_VERSION;
+        }
+    }
 }