Add compare button to duplicates in Citation relations tab

CHANGELOG.md

@@ -34,6 +34,7 @@ Note that this project **does not** adhere to [Semantic Versioning](https://semv
 - We added a different background color to the search bar to indicate when the search syntax is wrong. [#11658](https://github.com/JabRef/jabref/pull/11658)
 - We added a setting which always adds the literal "Cited on pages" text before each JStyle citation. [#11691](https://github.com/JabRef/jabref/pull/11732)
 - We added a new plain citation parser that uses LLMs. [#11825](https://github.com/JabRef/jabref/issues/11825)
+- We added a compare button to the duplicates in the citation relations tab to open the "Possible duplicate entries" window. [#11192](https://github.com/JabRef/jabref/issues/11192)
 
 ### Changed
 

src/main/java/org/jabref/gui/entryeditor/citationrelationtab/CitationRelationsTab.java

@@ -5,6 +5,7 @@
 import java.net.URI;
 import java.util.Arrays;
 import java.util.List;
+import java.util.Optional;
 
 import javax.swing.undo.UndoManager;
 
@@ -39,7 +40,12 @@
 import org.jabref.gui.entryeditor.citationrelationtab.semanticscholar.CitationFetcher;
 import org.jabref.gui.entryeditor.citationrelationtab.semanticscholar.SemanticScholarFetcher;
 import org.jabref.gui.icon.IconTheme;
+import org.jabref.gui.mergeentries.EntriesMergeResult;
+import org.jabref.gui.mergeentries.MergeEntriesDialog;
 import org.jabref.gui.preferences.GuiPreferences;
+import org.jabref.gui.undo.NamedCompound;
+import org.jabref.gui.undo.UndoableInsertEntries;
+import org.jabref.gui.undo.UndoableRemoveEntries;
 import org.jabref.gui.util.NoSelectionModel;
 import org.jabref.gui.util.ViewModelListCellFactory;
 import org.jabref.logic.bibtex.BibEntryWriter;
@@ -51,6 +57,7 @@
 import org.jabref.logic.os.OS;
 import org.jabref.logic.util.BackgroundTask;
 import org.jabref.logic.util.TaskExecutor;
+import org.jabref.model.database.BibDatabase;
 import org.jabref.model.database.BibDatabaseContext;
 import org.jabref.model.database.BibDatabaseMode;
 import org.jabref.model.database.BibDatabaseModeDetection;
@@ -89,6 +96,8 @@ public class CitationRelationsTab extends EntryEditorTab {
     private final CitationsRelationsTabViewModel citationsRelationsTabViewModel;
     private final DuplicateCheck duplicateCheck;
     private final BibEntryTypesManager entryTypesManager;
+    private final StateManager stateManager;
+    private final UndoManager undoManager;
 
     public CitationRelationsTab(DialogService dialogService,
                                 BibDatabaseContext databaseContext,
@@ -104,6 +113,8 @@ public CitationRelationsTab(DialogService dialogService,
         this.preferences = preferences;
         this.libraryTab = libraryTab;
         this.taskExecutor = taskExecutor;
+        this.undoManager = undoManager;
+        this.stateManager = stateManager;
         setText(Localization.lang("Citation relations"));
         setTooltip(new Tooltip(Localization.lang("Show articles related by citation")));
 
@@ -238,6 +249,13 @@ private void styleFetchedListView(CheckListView<CitationRelationItem> listView)
                             libraryTab.clearAndSelect(entry.localEntry());
                         });
                         vContainer.getChildren().add(jumpTo);
+
+                        Button compareButton = IconTheme.JabRefIcons.MERGE_ENTRIES.asButton();
+                        compareButton.setTooltip(new Tooltip(Localization.lang("Compare with existing entries")));
+                        compareButton.setOnMouseClicked(event -> {
+                            openPossibleDuplicateEntriesWindow(entry);
+                        });
+                        vContainer.getChildren().add(compareButton);
                     } else {
                         ToggleButton addToggle = IconTheme.JabRefIcons.ADD.asToggleButton();
                         addToggle.setTooltip(new Tooltip(Localization.lang("Select entry")));
@@ -504,4 +522,40 @@ private void importEntries(List<CitationRelationItem> entriesToImport, CitationF
 
         dialogService.notify(Localization.lang("Number of entries successfully imported") + ": " + entriesToImport.size());
     }
+
+    /**
+     * Function to open possible duplicate entries window to compare duplicate entries
+     *
+     * @param duplicateItem duplicate in the citation relations tab
+     */
+    private void openPossibleDuplicateEntriesWindow(CitationRelationItem duplicateItem) {
+        BibEntry localEntry = duplicateItem.localEntry();
+        BibEntry duplicateEntry = duplicateItem.entry();
+
+        MergeEntriesDialog dialog = new MergeEntriesDialog(localEntry, duplicateEntry, preferences);
+        dialog.setTitle(Localization.lang("Possible duplicate entries"));
+
+        Optional<EntriesMergeResult> mergeResultOpt = dialogService.showCustomDialogAndWait(dialog);
+        mergeResultOpt.ifPresentOrElse(entriesMergeResult -> {
+            BibDatabase database = stateManager.getActiveDatabase().get().getDatabase();
+
+            database.removeEntry(entriesMergeResult.originalLeftEntry());
+            database.insertEntry(entriesMergeResult.mergedEntry());
+
+            NamedCompound ce = new NamedCompound(Localization.lang("Merge entries"));
+            ce.addEdit(new UndoableRemoveEntries(database, entriesMergeResult.originalLeftEntry()));
+            ce.addEdit(new UndoableInsertEntries(stateManager.getActiveDatabase().get().getDatabase(), entriesMergeResult.mergedEntry()));
+            ce.end();
+
+            undoManager.addEdit(ce);
+
+            dialogService.notify(Localization.lang("Merged entries"));
+        }, () -> dialogService.notify(Localization.lang("Canceled merging entries")));
+
+        BibEntry current = libraryTab.getEntryEditor().getCurrentlyEditedEntry();
+        stateManager.getActiveDatabase().get().getDatabase().removeEntry(current);
+        stateManager.getActiveDatabase().get().getDatabase().insertEntry(current);
+        libraryTab.showAndEdit(current);
+        libraryTab.clearAndSelect(current);
+    }
 }

src/main/java/org/jabref/gui/entryeditor/citationrelationtab/CitationsRelationsTabViewModel.java

@@ -64,6 +64,7 @@ private void importCites(List<BibEntry> entries, BibEntry existingEntry, ImportH
 
         List<String> citeKeys = getExistingEntriesFromCiteField(existingEntry);
         citeKeys.removeIf(String::isEmpty);
+
         for (BibEntry entryToCite : entries) {
             if (generateNewKeyOnImport || entryToCite.getCitationKey().isEmpty()) {
                 String key = generator.generateKey(entryToCite);

src/main/java/org/jabref/gui/externalfiles/ImportHandler.java

@@ -8,6 +8,7 @@
 import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
+import java.util.Objects;
 import java.util.Optional;
 
 import javax.swing.undo.CompoundEdit;
@@ -194,6 +195,7 @@ public void importEntries(List<BibEntry> entries) {
     }
 
     public void importCleanedEntries(List<BibEntry> entries) {
+        entries = entries.stream().map(entry -> (BibEntry) entry.clone()).filter(Objects::nonNull).toList();
         bibDatabaseContext.getDatabase().insertEntries(entries);
         generateKeys(entries);
         setAutomaticFields(entries);

src/main/resources/l10n/JabRef_en.properties

@@ -2797,3 +2797,5 @@ Warning\:\ The\ selected\ directory\ is\ not\ a\ valid\ directory.=Warning: The
 Currently\ selected\ JStyle\:\ '%0' = Currently selected JStyle: '%0'
 Currently\ selected\ CSL\ Style\:\ '%0' = Currently selected CSL Style: '%0'
 Store\ url\ for\ downloaded\ file=Store url for downloaded file
+
+Compare\ with\ existing\ entries=Compare with existing entries