Merge branch 'sshkey_form_feedback' into master

This brings back in a change that was implemented in a pull request
from 2017, but got lost in the chaos of multiple pull requests from
intermingling branches.

This does not only provide feedback when a SSH key cannot be parsed,
but it also does so in a way that the warning goes away when a correct
key is added. Admittedly, I have no idea how to properly do this with
a Wicket FeedbackMessage, all I could find on Google was highly
complicated.

Not only does this bring back (or really in) the fix for issue #1226,
but it also fixes #984.

src/main/java/com/gitblit/wicket/GitBlitWebApp.properties

@@ -738,6 +738,8 @@ gb.emailAddressDescription = The primary email address for receiving notificatio
 gb.sshKeys = SSH Keys
 gb.sshKeysDescription = SSH public key authentication is a secure alternative to password authentication
 gb.addSshKey = Add SSH Key
+gb.addSshKeyErrorEmpty = SSH public key empty. Please provide a valid SSH public key
+gb.addSshKeyErrorFormat = Not a valid SSH public key format. Please provide a valid SSH public key
 gb.key = Key
 gb.sshKeyComment = Comment
 gb.sshKeyCommentDescription = Enter an optional comment. If blank, the comment will be extracted from the key data.

src/main/java/com/gitblit/wicket/GitBlitWebApp_de.properties

@@ -735,6 +735,8 @@ gb.emailAddressDescription = Die prim\u00e4re Emailadresse f\u00fcr den Empfang
 gb.sshKeys = SSH Keys
 gb.sshKeysDescription = SSH Public Key Authentifizierung ist eine sichere Alternative zur Authentifizierung mit Passwort
 gb.addSshKey = SSH Key hinzuf\u00fcgen
+gb.addSshKeyErrorEmpty = SSH Public Key leer. Bitte geben Sie einen g\u00fltigen SSH Public Key an
+gb.addSshKeyErrorFormat = SSH Public Key Format ungültig. Bitte geben Sie einen g\u00fltigen SSH Public Key an
 gb.key = Key
 gb.sshKeyComment = Kommentar
 gb.sshKeyCommentDescription = Geben Sie optional einen Kommentar ein. Falls Sie dies nicht tun, wird der Kommentar aus dem Key extrahiert.

src/main/java/com/gitblit/wicket/panels/SshKeysPanel.html

@@ -37,7 +37,8 @@
 			<div wicket:id="addKeyData"></div>
 			<div wicket:id="addKeyPermission"></div>
 			<div wicket:id="addKeyComment"></div>
-		
+			<div wicket:id="addKeyFeedback"></div>
+
 			<div class="form-actions"><input class="btn btn-appmenu" type="submit" value="Add" wicket:message="value:gb.add" wicket:id="addKeyButton" /></div>
 		</form>
 	</div>

src/main/java/com/gitblit/wicket/panels/SshKeysPanel.java

@@ -19,6 +19,8 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
+import com.gitblit.wicket.WicketUtils;
+import org.apache.wicket.Component;
 import org.apache.wicket.ajax.AjaxRequestTarget;
 import org.apache.wicket.ajax.markup.html.AjaxLink;
 import org.apache.wicket.ajax.markup.html.form.AjaxButton;
@@ -63,6 +65,7 @@ public class SshKeysPanel extends BasePanel {
 
 		setOutputMarkupId(true);
 
+		final IModel<String> keyFeedback = Model.of("");
 		final List<SshKey> keys = new ArrayList<SshKey>(app().keys().getKeys(user.username));
 		final ListDataProvider<SshKey> dp = new ListDataProvider<SshKey>(keys);
 		final DataView<SshKey> keysView = new DataView<SshKey>("keys", dp) {
@@ -90,6 +93,7 @@ public class SshKeysPanel extends BasePanel {
 							// update the panel
 							target.addComponent(SshKeysPanel.this);
 						}
+						keyFeedback.setObject("");
 					}
 				};
 				if (!canWriteKeys) {
@@ -123,6 +127,10 @@ public class SshKeysPanel extends BasePanel {
 				"span5",
 				keyComment));
 
+		Component addKeyFeedback = new Label("addKeyFeedback", keyFeedback).setOutputMarkupId(true);
+		WicketUtils.setCssStyle(addKeyFeedback, "color: red; font-weight: bold;");
+		addKeyForm.add(addKeyFeedback);
+
 		addKeyForm.add(new AjaxButton("addKeyButton") {
 
 			private static final long serialVersionUID = 1L;
@@ -134,6 +142,8 @@ public class SshKeysPanel extends BasePanel {
 				String data = keyData.getObject();
 				if (StringUtils.isEmpty(data)) {
 					// do not submit empty key
+					keyFeedback.setObject(getString("gb.addSshKeyErrorEmpty"));
+					target.addComponent(addKeyFeedback);
 					return;
 				}
 
@@ -142,6 +152,8 @@ public class SshKeysPanel extends BasePanel {
 					key.getPublicKey();
 				} catch (Exception e) {
 					// failed to parse the key
+					keyFeedback.setObject(getString("gb.addSshKeyErrorFormat"));
+					target.addComponent(addKeyFeedback);
 					return;
 				}
 
@@ -163,9 +175,12 @@ public class SshKeysPanel extends BasePanel {
 					keys.clear();
 					keys.addAll(app().keys().getKeys(user.username));
 
+					keyFeedback.setObject("");
+
 					// update the panel
 					target.addComponent(SshKeysPanel.this);
 				}
+				else keyFeedback.setObject("Key not added.");
 			}
 		});