Improved Error Dialog

src/main/java/org/cryptomator/common/ErrorCode.java

@@ -32,18 +32,15 @@ private ErrorCode(Throwable throwable, Throwable rootCause, int rootCauseSpecifi
 		this.rootCauseSpecificFrames = rootCauseSpecificFrames;
 	}
 
-	// visible for testing
-	String methodCode() {
+	public String methodCode() {
 		return format(traceCode(rootCause, LATEST_FRAME));
 	}
 
-	// visible for testing
-	String rootCauseCode() {
+	public String rootCauseCode() {
 		return format(traceCode(rootCause, rootCauseSpecificFrames));
 	}
 
-	// visible for testing
-	String throwableCode() {
+	public String throwableCode() {
 		return format(traceCode(throwable, ALL_FRAMES));
 	}
 

src/main/java/org/cryptomator/ui/error/ErrorController.java

@@ -1,5 +1,7 @@
 package org.cryptomator.ui.error;
 
+import com.google.common.reflect.TypeToken;
+import com.google.gson.Gson;
 import org.cryptomator.common.Environment;
 import org.cryptomator.common.ErrorCode;
 import org.cryptomator.common.Nullable;
@@ -9,20 +11,34 @@
 import javax.inject.Named;
 import javafx.application.Application;
 import javafx.application.Platform;
+import javafx.beans.binding.BooleanExpression;
 import javafx.beans.property.BooleanProperty;
+import javafx.beans.property.ObjectProperty;
 import javafx.beans.property.SimpleBooleanProperty;
+import javafx.beans.property.SimpleObjectProperty;
 import javafx.fxml.FXML;
 import javafx.scene.Scene;
 import javafx.scene.input.Clipboard;
 import javafx.scene.input.ClipboardContent;
 import javafx.stage.Stage;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.URI;
 import java.net.URLEncoder;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
 import java.nio.charset.StandardCharsets;
+import java.util.Comparator;
+import java.util.Map;
+import java.util.Optional;
 import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutorService;
 import java.util.concurrent.TimeUnit;
 
 public class ErrorController implements FxController {
 
+	private static final String ERROR_CODES_URL = "https://gist.githubusercontent.com/cryptobot/accba9fb9555e7192271b85606f97230/raw/errorcodes.json";
 	private static final String SEARCH_URL_FORMAT = "https://github.com/cryptomator/cryptomator/discussions/categories/errors?discussions_q=category:Errors+%s";
 	private static final String REPORT_URL_FORMAT = "https://github.com/cryptomator/cryptomator/discussions/new?category=Errors&title=Error+%s&body=%s";
 	private static final String SEARCH_ERRORCODE_DELIM = " OR ";
@@ -46,16 +62,28 @@ public class ErrorController implements FxController {
 	private final Stage window;
 	private final Environment environment;
 
-	private BooleanProperty copiedDetails = new SimpleBooleanProperty();
+	private final BooleanProperty copiedDetails = new SimpleBooleanProperty();
+	private final ObjectProperty<ErrorDiscussion> matchingErrorDiscussion = new SimpleObjectProperty<>();
+	private final BooleanExpression errorSolutionFound = matchingErrorDiscussion.isNotNull();
+	private final BooleanProperty isLoadingHttpResponse = new SimpleBooleanProperty();
 
 	@Inject
-	ErrorController(Application application, @Named("stackTrace") String stackTrace, ErrorCode errorCode, @Nullable Scene previousScene, Stage window, Environment environment) {
+	ErrorController(Application application, @Named("stackTrace") String stackTrace, ErrorCode errorCode, @Nullable Scene previousScene, Stage window, Environment environment, ExecutorService executorService) {
 		this.application = application;
 		this.stackTrace = stackTrace;
 		this.errorCode = errorCode;
 		this.previousScene = previousScene;
 		this.window = window;
 		this.environment = environment;
+
+		isLoadingHttpResponse.set(true);
+		HttpClient httpClient = HttpClient.newBuilder().version(HttpClient.Version.HTTP_1_1).build();
+		HttpRequest httpRequest = HttpRequest.newBuilder()//
+				.uri(URI.create(ERROR_CODES_URL))//
+				.build();
+		httpClient.sendAsync(httpRequest, HttpResponse.BodyHandlers.ofInputStream())//
+				.thenAcceptAsync(this::loadHttpResponse, executorService)//
+				.whenCompleteAsync((r, e) -> isLoadingHttpResponse.set(false), Platform::runLater);
 	}
 
 	@FXML
@@ -70,6 +98,16 @@ public void close() {
 		window.close();
 	}
 
+	@FXML
+	public void showSolution() {
+		if (matchingErrorDiscussion.isNotNull().get()) {
+			var discussion = matchingErrorDiscussion.get();
+			if (discussion != null) {
+				application.getHostServices().showDocument(discussion.url);
+			}
+		}
+	}
+
 	@FXML
 	public void searchError() {
 		var searchTerm = URLEncoder.encode(getErrorCode().replace(ErrorCode.DELIM, SEARCH_ERRORCODE_DELIM), StandardCharsets.UTF_8);
@@ -95,13 +133,119 @@ public void copyDetails() {
 		Clipboard.getSystemClipboard().setContent(clipboardContent);
 
 		copiedDetails.set(true);
-		CompletableFuture.delayedExecutor(2, TimeUnit.SECONDS, Platform::runLater).execute(() -> {
-			copiedDetails.set(false);
-		});
+		CompletableFuture.delayedExecutor(2, TimeUnit.SECONDS, Platform::runLater).execute(() -> copiedDetails.set(false));
 	}
 
-	/* Getter/Setter */
+	private void loadHttpResponse(HttpResponse<InputStream> response) {
+		if (response.statusCode() == 200) {
+			Map<String, ErrorDiscussion> errorDiscussionMap = new Gson().fromJson(//
+					new InputStreamReader(response.body(), StandardCharsets.UTF_8),//
+					new TypeToken<Map<String, ErrorDiscussion>>() {
+					}.getType());
+
+			if (errorDiscussionMap.values().stream().anyMatch(this::containsMethodCode)) {
+				Comparator<ErrorDiscussion> comp = this::compareByFullErrorCode;
+				Optional<ErrorDiscussion> value = errorDiscussionMap.values().stream().filter(this::containsMethodCode)//
+						.min(comp//
+								.thenComparing(this::compareByRootCauseCode)//
+								.thenComparing(this::compareIsAnswered)//
+								.thenComparing(this::compareUpvoteCount));
+
+				if (value.isPresent()) {
+					matchingErrorDiscussion.set(value.get());
+				}
+			}
+		}
+	}
+
+	/**
+	 * Checks if an ErrorDiscussion object's title contains the error code's method code.
+	 *
+	 * @param errorDiscussion The ErrorDiscussion object to be checked.
+	 * @return A boolean value indicating if the ErrorDiscussion object's title contains the error code's method code:
+	 * - true if the title contains the method code,
+	 * - false otherwise.
+	 */
+	public boolean containsMethodCode(ErrorDiscussion errorDiscussion) {
+		return errorDiscussion.title.contains(" " + errorCode.methodCode());
+	}
+
+	/**
+	 * Compares two ErrorDiscussion objects based on their upvote counts and returns the result.
+	 *
+	 * @param ed1 The first ErrorDiscussion object.
+	 * @param ed2 The second ErrorDiscussion object.
+	 * @return An integer indicating which ErrorDiscussion object has a higher upvote count:
+	 * - A positive value if ed2 has a higher upvote count than ed1,
+	 * - A negative value if ed1 has a higher upvote count than ed2,
+	 * - Or 0 if both upvote counts are equal.
+	 */
+	public int compareUpvoteCount(ErrorDiscussion ed1, ErrorDiscussion ed2) {
+		return Integer.compare(ed2.upvoteCount, ed1.upvoteCount);
+	}
+
+	/**
+	 * Compares two ErrorDiscussion objects based on their answered status and returns the result.
+	 *
+	 * @param ed1 The first ErrorDiscussion object.
+	 * @param ed2 The second ErrorDiscussion object.
+	 * @return An integer indicating the answered status of the ErrorDiscussion objects:
+	 * - A negative value (-1) if ed1 is considered answered and ed2 is considered unanswered,
+	 * - A positive value (1) if ed1 is considered unanswered and ed2 is considered answered,
+	 * - Or 0 if both ErrorDiscussion objects are considered answered or unanswered.
+	 */
+	public int compareIsAnswered(ErrorDiscussion ed1, ErrorDiscussion ed2) {
+		if (ed1.answer != null && ed2.answer == null) {
+			return -1;
+		} else if (ed1.answer == null && ed2.answer != null) {
+			return 1;
+		} else {
+			return 0;
+		}
+	}
 
+	/**
+	 * Compares two ErrorDiscussion objects based on the presence of the full error code in their titles and returns the result.
+	 *
+	 * @param ed1 The first ErrorDiscussion object.
+	 * @param ed2 The second ErrorDiscussion object.
+	 * @return An integer indicating the comparison result based on the presence of the full error code in the titles:
+	 * - A negative value (-1) if ed1 contains the full error code in the title and ed2 does not have a match,
+	 * - A positive value (1) if ed1 does not have a match and ed2 contains the full error code in the title,
+	 * - Or 0 if both ErrorDiscussion objects either contain the full error code or do not have a match in the titles.
+	 */
+	public int compareByFullErrorCode(ErrorDiscussion ed1, ErrorDiscussion ed2) {
+		if (ed1.title.contains(getErrorCode()) && !ed2.title.contains(getErrorCode())) {
+			return -1;
+		} else if (!ed1.title.contains(getErrorCode()) && ed2.title.contains(getErrorCode())) {
+			return 1;
+		} else {
+			return 0;
+		}
+	}
+
+	/**
+	 * Compares two ErrorDiscussion objects based on the presence of the root cause code in their titles and returns the result.
+	 *
+	 * @param ed1 The first ErrorDiscussion object.
+	 * @param ed2 The second ErrorDiscussion object.
+	 * @return An integer indicating the comparison result based on the presence of the root cause code in the titles:
+	 * - A negative value (-1) if ed1 contains the root cause code in the title and ed2 does not have a match,
+	 * - A positive value (1) if ed1 does not have a match and ed2 contains the root cause code in the title,
+	 * - Or 0 if both ErrorDiscussion objects either contain the root cause code or do not have a match in the titles.
+	 */
+	public int compareByRootCauseCode(ErrorDiscussion ed1, ErrorDiscussion ed2) {
+		String value = " " + errorCode.methodCode() + ErrorCode.DELIM + errorCode.rootCauseCode();
+		if (ed1.title.contains(value) && !ed2.title.contains(value)) {
+			return -1;
+		} else if (!ed1.title.contains(value) && ed2.title.contains(value)) {
+			return 1;
+		} else {
+			return 0;
+		}
+	}
+
+	/* Getter/Setter */
 	public boolean isPreviousScenePresent() {
 		return previousScene != null;
 	}
@@ -125,4 +269,21 @@ public BooleanProperty copiedDetailsProperty() {
 	public boolean getCopiedDetails() {
 		return copiedDetails.get();
 	}
-}
+
+	public BooleanExpression errorSolutionFoundProperty() {
+		return errorSolutionFound;
+	}
+
+	public boolean getErrorSolutionFound() {
+		return errorSolutionFound.get();
+	}
+
+	public BooleanProperty isLoadingHttpResponseProperty() {
+		return isLoadingHttpResponse;
+	}
+
+	public boolean getIsLoadingHttpResponse() {
+		return isLoadingHttpResponse.get();
+	}
+
+}

src/main/java/org/cryptomator/ui/error/ErrorDiscussion.java

@@ -0,0 +1,13 @@
+package org.cryptomator.ui.error;
+
+public class ErrorDiscussion {
+
+	int upvoteCount;
+	String title;
+	String url;
+	Answer answer;
+
+	static class Answer {
+
+	}
+}

src/main/resources/fxml/error.fxml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
 <?import org.cryptomator.ui.controls.FontAwesome5IconView?>
+<?import org.cryptomator.ui.controls.FontAwesome5Spinner?>
 <?import org.cryptomator.ui.controls.FormattedLabel?>
 <?import javafx.geometry.Insets?>
 <?import javafx.scene.control.Button?>
@@ -31,20 +32,28 @@
 			</StackPane>
 			<VBox spacing="6" HBox.hgrow="ALWAYS">
 				<FormattedLabel styleClass="label-extra-large" format="%error.message" arg1="${controller.errorCode}"/>
-				<Label text="%error.description" wrapText="true"/>
-				<Hyperlink styleClass="hyperlink-underline" text="%error.hyperlink.lookup" onAction="#searchError" contentDisplay="LEFT">
-					<graphic>
-						<FontAwesome5IconView glyph="LINK" glyphSize="12"/>
-					</graphic>
-				</Hyperlink>
-				<Hyperlink styleClass="hyperlink-underline" text="%error.hyperlink.report" onAction="#reportError" contentDisplay="LEFT">
-					<graphic>
-						<FontAwesome5IconView glyph="LINK" glyphSize="12"/>
-					</graphic>
-				</Hyperlink>
+				<FontAwesome5Spinner glyphSize="24" visible="${controller.isLoadingHttpResponse}" managed="${controller.isLoadingHttpResponse}"/>
+				<VBox visible="${!controller.isLoadingHttpResponse}" managed="${!controller.isLoadingHttpResponse}">
+					<Label text="%error.existingSolutionDescription" wrapText="true" visible="${controller.errorSolutionFound}" managed="${controller.errorSolutionFound}"/>
+					<Hyperlink styleClass="hyperlink-underline" text="%error.hyperlink.solution" onAction="#showSolution" contentDisplay="LEFT" visible="${controller.errorSolutionFound}" managed="${controller.errorSolutionFound}">
+						<graphic>
+							<FontAwesome5IconView glyph="LINK" glyphSize="12"/>
+						</graphic>
+					</Hyperlink>
+					<Label text="%error.description" wrapText="true" visible="${!controller.errorSolutionFound}" managed="${!controller.errorSolutionFound}"/>
+					<Hyperlink styleClass="hyperlink-underline" text="%error.hyperlink.lookup" onAction="#searchError" contentDisplay="LEFT" visible="${!controller.errorSolutionFound}" managed="${!controller.errorSolutionFound}">
+						<graphic>
+							<FontAwesome5IconView glyph="LINK" glyphSize="12"/>
+						</graphic>
+					</Hyperlink>
+					<Hyperlink styleClass="hyperlink-underline" text="%error.hyperlink.report" onAction="#reportError" contentDisplay="LEFT" visible="${!controller.errorSolutionFound}" managed="${!controller.errorSolutionFound}">
+						<graphic>
+							<FontAwesome5IconView glyph="LINK" glyphSize="12"/>
+						</graphic>
+					</Hyperlink>
+				</VBox>
 			</VBox>
 		</HBox>
-
 		<VBox spacing="6" VBox.vgrow="ALWAYS">
 			<HBox>
 				<Label text="%error.technicalDetails"/>

src/main/resources/i18n/strings.properties

@@ -21,6 +21,9 @@ error.description=Cryptomator didn't expect this to happen. You can look up exis
 error.hyperlink.lookup=Look up this error
 error.hyperlink.report=Report this error
 error.technicalDetails=Details:
+error.existingSolutionDescription=Cryptomator didn't expect this to happen. But we found an existing solution for this error. Please take a look at the following link.
+error.hyperlink.solution=Look up the solution
+
 
 # Defaults
 defaults.vault.vaultName=Vault