feature: Copy snippet to clipboard in case of single result

.github/workflows/build.yml

@@ -29,5 +29,7 @@ jobs:
         path: ~/.m2
         key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
         restore-keys: ${{ runner.os }}-m2
+    - name: Install xvfb for headless unit tests
+      run: sudo apt install xvfb
     - name: Build with Maven
-      run: mvn -B verify
+      run: xvfb-run mvn -B verify

README.md

@@ -59,7 +59,7 @@ This setup does not touch your computer - as soon as you close your browser tab,
 
 ## Ideas for future development
 * [ ] Proper support for multiple classifiers at a particular coordinate.
-* [ ] Immediately copy the pom.xml snippet to the clipboard.
+* [x] Immediately copy the pom.xml snippet to the clipboard.
 * [x] Show the coordinates in a different form (Ivy, Gradle, SBT).
 
 

src/main/java/it/mulders/mcs/search/printer/CoordinatePrinter.java

@@ -2,6 +2,8 @@
 
 import it.mulders.mcs.search.SearchQuery;
 import it.mulders.mcs.search.SearchResponse;
+import it.mulders.mcs.search.printer.clipboard.Clipboard;
+import it.mulders.mcs.search.printer.clipboard.SystemClipboard;
 
 import java.io.PrintStream;
 
@@ -18,8 +20,18 @@ default void print(final SearchQuery query, final SearchResponse.Response respon
         }
 
         var doc = response.docs()[0];
+        String coordinates = provideCoordinates(doc.g(), doc.a(), first(doc.v(), doc.latestVersion()));
+
+        stream.println();
+        stream.println(coordinates);
         stream.println();
-        stream.println(provideCoordinates(doc.g(), doc.a(), first(doc.v(), doc.latestVersion())));
+
+        copyToClipboard(stream, new SystemClipboard(), coordinates);
+    }
+
+    private void copyToClipboard(PrintStream stream, Clipboard clipboard, String coordinates) {
+        clipboard.copy(coordinates);
+        stream.println("Snippet copied to clipboard.");
         stream.println();
     }
 

src/main/java/it/mulders/mcs/search/printer/clipboard/Clipboard.java

@@ -0,0 +1,7 @@
+package it.mulders.mcs.search.printer.clipboard;
+
+public sealed interface Clipboard permits SystemClipboard {
+    void copy(String text);
+    String paste();
+}
+

src/main/java/it/mulders/mcs/search/printer/clipboard/SystemClipboard.java

@@ -0,0 +1,40 @@
+package it.mulders.mcs.search.printer.clipboard;
+
+import java.awt.*;
+import java.awt.datatransfer.StringSelection;
+import java.awt.datatransfer.Transferable;
+import java.awt.datatransfer.UnsupportedFlavorException;
+import java.io.IOException;
+
+import static java.awt.datatransfer.DataFlavor.stringFlavor;
+
+public final class SystemClipboard implements Clipboard {
+    java.awt.datatransfer.Clipboard systemClipboard;
+
+    public SystemClipboard() {
+        this.systemClipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
+    }
+
+    @Override
+    public void copy(String text) {
+        var clipboardData = new StringSelection(text);
+        systemClipboard.setContents(clipboardData, clipboardData);
+    }
+
+    @Override
+    public String paste() {
+        Transferable clipboardData = systemClipboard.getContents(null);
+        String text = "";
+        boolean hasTransferableText = clipboardData != null && clipboardData.isDataFlavorSupported(stringFlavor);
+
+        if (hasTransferableText) {
+            try {
+                text = (String) clipboardData.getTransferData(stringFlavor);
+            } catch (IOException | UnsupportedFlavorException e) {
+                throw new RuntimeException(e);
+            }
+        }
+
+        return text;
+    }
+}

src/test/java/it/mulders/mcs/search/printer/CoordinatePrinterTest.java

@@ -2,6 +2,8 @@
 
 import it.mulders.mcs.search.SearchQuery;
 import it.mulders.mcs.search.SearchResponse;
+import it.mulders.mcs.search.printer.clipboard.Clipboard;
+import it.mulders.mcs.search.printer.clipboard.SystemClipboard;
 import org.assertj.core.api.WithAssertions;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
@@ -34,7 +36,7 @@ class CoordinatePrinterTest implements WithAssertions {
             </dependency>
             """;
     private static final String GRADLE_GROOVY_OUTPUT = "implementation group: 'org.codehaus.plexus', name: 'plexus-utils', version: '3.4.1'";
-    private static final String GRADLE_GROOVY_SHORT_OUTPUT = "'org.codehaus.plexus:plexus-utils:3.4.1'";
+    private static final String GRADLE_GROOVY_SHORT_OUTPUT = "implementation 'org.codehaus.plexus:plexus-utils:3.4.1'";
     private static final String GRADLE_KOTLIN_OUTPUT = "implementation(\"org.codehaus.plexus:plexus-utils:3.4.1\")";
     private static final String SBT_OUTPUT = """
             libraryDependencies += "org.codehaus.plexus" % "plexus-utils" % "3.4.1"
@@ -51,6 +53,7 @@ class CoordinatePrinterTest implements WithAssertions {
     private static final String BUILDR_OUTPUT = "'org.codehaus.plexus:plexus-utils:jar:3.4.1'";
 
     private final ByteArrayOutputStream buffer = new ByteArrayOutputStream();
+    private final Clipboard clipboard = new SystemClipboard();
 
     private static Stream<Arguments> coordinatePrinters() {
         return Stream.of(
@@ -74,4 +77,12 @@ void should_print_snippet(CoordinatePrinter printer, String expected) {
 
         assertThat(xml).containsIgnoringWhitespaces(expected);
     }
+
+    @ParameterizedTest
+    @MethodSource("coordinatePrinters")
+    void should_copy_to_clipboard(CoordinatePrinter printer, String expected) {
+        printer.print(QUERY, RESPONSE, new PrintStream(buffer));
+
+        assertThat(clipboard.paste()).isEqualToIgnoringWhitespace(expected);
+    }
 }

src/test/java/it/mulders/mcs/search/printer/clipboard/ClipboardTest.java

@@ -0,0 +1,25 @@
+package it.mulders.mcs.search.printer.clipboard;
+
+import org.assertj.core.api.WithAssertions;
+import org.junit.jupiter.api.Test;
+
+class ClipboardTest implements WithAssertions {
+    private final Clipboard clipboard = new SystemClipboard();
+
+    @Test
+    void paste_result_should_be_equal_to_copied_text() {
+        var singleLineText = "'org.codehaus.plexus:plexus-utils:jar:3.4.1'";
+        clipboard.copy(singleLineText);
+        assertThat(clipboard.paste()).isEqualTo(singleLineText);
+
+        var multiLineText = """
+            <dependency>
+                <groupId>org.codehaus.plexus</groupId>
+                <artifactId>plexus-utils</artifactId>
+                <version>3.4.1</version>
+            </dependency>
+            """;
+        clipboard.copy(multiLineText);
+        assertThat(clipboard.paste()).isEqualTo(multiLineText);
+    }
+}