Add ability to use DOI directly in Web Search

CHANGELOG.md

@@ -27,6 +27,7 @@ Note that this project **does not** adhere to [Semantic Versioning](http://semve
 - We added the option to disable the automatic linking of files in the entry editor [#5105](https://github.com/JabRef/jabref/issues/5105)
 - We added the link icon for ISBNs in linked identifiers column. [#9819](https://github.com/JabRef/jabref/issues/9819)
 - We added support for parsing MathML in the Medline importer. [#4273](https://github.com/JabRef/jabref/issues/4273)
+- We added the ability to search for a DOI directly from 'Web Search'. [#9674](https://github.com/JabRef/jabref/issues/9674)
 
 ### Changed
 

src/main/java/org/jabref/gui/importer/fetcher/WebSearchPaneViewModel.java

@@ -1,7 +1,9 @@
 package org.jabref.gui.importer.fetcher;
 
 import java.util.Map;
+import java.util.Optional;
 import java.util.SortedSet;
+import java.util.concurrent.Callable;
 
 import javafx.beans.property.ListProperty;
 import javafx.beans.property.ObjectProperty;
@@ -20,8 +22,11 @@
 import org.jabref.logic.importer.ParserResult;
 import org.jabref.logic.importer.SearchBasedFetcher;
 import org.jabref.logic.importer.WebFetchers;
+import org.jabref.logic.importer.fetcher.DoiFetcher;
 import org.jabref.logic.l10n.Localization;
+import org.jabref.model.entry.identifier.DOI;
 import org.jabref.model.strings.StringUtil;
+import org.jabref.model.util.OptionalUtil;
 import org.jabref.preferences.PreferencesService;
 import org.jabref.preferences.SidePanePreferences;
 
@@ -43,6 +48,7 @@ public class WebSearchPaneViewModel {
     private final ListProperty<SearchBasedFetcher> fetchers = new SimpleListProperty<>(FXCollections.observableArrayList());
     private final StringProperty query = new SimpleStringProperty();
     private final DialogService dialogService;
+    private final PreferencesService preferencesService;
     private final StateManager stateManager;
 
     private final Validator searchQueryValidator;
@@ -51,6 +57,7 @@ public class WebSearchPaneViewModel {
     public WebSearchPaneViewModel(PreferencesService preferencesService, DialogService dialogService, StateManager stateManager) {
         this.dialogService = dialogService;
         this.stateManager = stateManager;
+        this.preferencesService = preferencesService;
 
         SortedSet<SearchBasedFetcher> allFetchers = WebFetchers.getSearchBasedFetchers(
                 preferencesService.getImportFormatPreferences(),
@@ -77,6 +84,13 @@ public WebSearchPaneViewModel(PreferencesService preferencesService, DialogServi
                         // in case user did not enter something, it is treated as valid (to avoid UI WTFs)
                         return null;
                     }
+
+                    Optional<DOI> doi = DOI.findInText(queryText);
+                    if (doi.isPresent()) {
+                        // in case the query contains a DOI, it is treated as valid
+                        return null;
+                    }
+
                     try {
                         parser.parse(queryText, NO_EXPLICIT_FIELD);
                         return null;
@@ -130,16 +144,26 @@ public void search() {
         }
 
         SearchBasedFetcher activeFetcher = getSelectedFetcher();
+        Callable<ParserResult> parserResultCallable = () -> new ParserResult(activeFetcher.performSearch(query));
+        String fetcherName = activeFetcher.getName();
+
+        Optional<DOI> doi = DOI.findInText(query);
+        if (doi.isPresent()) {
+            DoiFetcher doiFetcher = new DoiFetcher(preferencesService.getImportFormatPreferences());
+            parserResultCallable = () -> new ParserResult(OptionalUtil.toList(doiFetcher.performSearchById(doi.get().getDOI())));
+            fetcherName = doiFetcher.getName();
+        }
+
+        String finalFetcherName = fetcherName;
         Globals.getTelemetryClient().ifPresent(client ->
-                client.trackEvent("search", Map.of("fetcher", activeFetcher.getName()), Map.of()));
+                client.trackEvent("search", Map.of("fetcher", finalFetcherName), Map.of()));
 
-        BackgroundTask<ParserResult> task;
-        task = BackgroundTask.wrap(() -> new ParserResult(activeFetcher.performSearch(query)))
+        BackgroundTask<ParserResult> task = BackgroundTask.wrap(parserResultCallable)
                              .withInitialMessage(Localization.lang("Processing %0", query));
         task.onFailure(dialogService::showErrorDialogAndWait);
 
         ImportEntriesDialog dialog = new ImportEntriesDialog(stateManager.getActiveDatabase().get(), task);
-        dialog.setTitle(activeFetcher.getName());
+        dialog.setTitle(fetcherName);
         dialogService.showCustomDialogAndWait(dialog);
     }
 

src/test/java/org/jabref/gui/importer/fetcher/WebSearchPaneViewModelTest.java

@@ -57,4 +57,22 @@ void notCorrectQueryValidationStatus() {
         viewModel.queryProperty().setValue("Miami AND Beach OR Houston AND Texas");
         assertFalse(viewModel.queryValidationStatus().validProperty().not().getValue());
     }
+
+    @Test
+    void queryConsistingOfDOIIsValid() {
+        viewModel.queryProperty().setValue("10.1007/JHEP02(2023)082");
+        assertTrue(viewModel.queryValidationStatus().validProperty().getValue());
+    }
+
+    @Test
+    void canExtractDOIFromQueryText() {
+        viewModel.queryProperty().setValue("this is the DOI: 10.1007/JHEP02(2023)082, other text");
+        assertTrue(viewModel.queryValidationStatus().validProperty().getValue());
+    }
+
+    @Test
+    void queryConsistingOfInvalidDOIIsInvalid() {
+        viewModel.queryProperty().setValue("101.1007/JHEP02(2023)082");
+        assertFalse(viewModel.queryValidationStatus().validProperty().getValue());
+    }
 }