feat: support searching via google scholar

Author: brandon-lau0

jabgui/src/main/java/org/jabref/gui/actions/StandardActions.java

@@ -37,6 +37,7 @@ public enum StandardActions implements Action {
     EXTRACT_FILE_REFERENCES_OFFLINE(Localization.lang("Extract references from file (offline)"), IconTheme.JabRefIcons.FILE_STAR),
     OPEN_URL(Localization.lang("Open URL or DOI"), IconTheme.JabRefIcons.WWW, KeyBinding.OPEN_URL_OR_DOI),
     SEARCH_SHORTSCIENCE(Localization.lang("Search ShortScience")),
+    SEARCH_GOOGLE_SCHOLAR(Localization.lang("Search Google Scholar")),
     MERGE_WITH_FETCHED_ENTRY(Localization.lang("Get bibliographic data from %0", "DOI/ISBN/..."), KeyBinding.MERGE_WITH_FETCHED_ENTRY),
     ATTACH_FILE(Localization.lang("Attach file"), IconTheme.JabRefIcons.ATTACH_FILE),
     ATTACH_FILE_FROM_URL(Localization.lang("Attach file from URL"), IconTheme.JabRefIcons.DOWNLOAD_FILE),

jabgui/src/main/java/org/jabref/gui/maintable/RightClickMenu.java

@@ -102,6 +102,7 @@ public static ContextMenu create(BibEntryTableViewModel entry,
 
                 factory.createMenuItem(StandardActions.OPEN_URL, new OpenUrlAction(dialogService, stateManager, preferences)),
                 factory.createMenuItem(StandardActions.SEARCH_SHORTSCIENCE, new SearchShortScienceAction(dialogService, stateManager, preferences)),
+                factory.createMenuItem(StandardActions.SEARCH_GOOGLE_SCHOLAR, new SearchGoogleScholarAction(dialogService, stateManager, preferences)),
 
                 new SeparatorMenuItem(),
 

jabgui/src/main/java/org/jabref/gui/maintable/SearchGoogleScholarAction.java

@@ -0,0 +1,52 @@
+package org.jabref.gui.maintable;
+
+import java.io.IOException;
+import java.util.List;
+
+import org.jabref.gui.DialogService;
+import org.jabref.gui.StateManager;
+import static org.jabref.gui.actions.ActionHelper.isFieldSetForSelectedEntry;
+import static org.jabref.gui.actions.ActionHelper.needsEntriesSelected;
+import org.jabref.gui.actions.SimpleCommand;
+import org.jabref.gui.desktop.os.NativeDesktop;
+import org.jabref.gui.preferences.GuiPreferences;
+import org.jabref.logic.l10n.Localization;
+import org.jabref.logic.util.ExternalLinkCreator;
+import org.jabref.model.entry.BibEntry;
+import org.jabref.model.entry.field.StandardField;
+
+import javafx.beans.binding.BooleanExpression;
+
+public class SearchGoogleScholarAction extends SimpleCommand {
+    private final DialogService dialogService;
+    private final StateManager stateManager;
+    private final GuiPreferences preferences;
+
+    public SearchGoogleScholarAction(DialogService dialogService, StateManager stateManager, GuiPreferences preferences) {
+        this.dialogService = dialogService;
+        this.stateManager = stateManager;
+        this.preferences = preferences;
+
+        BooleanExpression fieldIsSet = isFieldSetForSelectedEntry(StandardField.TITLE, stateManager);
+        this.executable.bind(needsEntriesSelected(1, stateManager).and(fieldIsSet));
+    }
+
+    @Override
+    public void execute() {
+        stateManager.getActiveDatabase().ifPresent(databaseContext -> {
+            final List<BibEntry> bibEntries = stateManager.getSelectedEntries();
+
+            if (bibEntries.size() != 1) {
+                dialogService.notify(Localization.lang("This operation requires exactly one item to be selected."));
+                return;
+            }
+            ExternalLinkCreator.getGoogleScholarSearchURL(bibEntries.getFirst()).ifPresent(url -> {
+                try {
+                    NativeDesktop.openExternalViewer(databaseContext, preferences, url, StandardField.URL, dialogService, bibEntries.getFirst());
+                } catch (IOException ex) {
+                    dialogService.showErrorDialogAndWait(Localization.lang("Unable to open Google Scholar."), ex);
+                }
+            });
+        });
+    }
+}

jablib/src/main/java/org/jabref/logic/util/ExternalLinkCreator.java

@@ -10,6 +10,7 @@
 
 public class ExternalLinkCreator {
     private static final String SHORTSCIENCE_SEARCH_URL = "https://www.shortscience.org/internalsearch";
+    private static final String GOOGLE_SCHOLAR_SEARCH_URL = "https://scholar.google.com/scholar";
 
     /**
      * Get a URL to the search results of ShortScience for the BibEntry's title
@@ -31,4 +32,25 @@ public static Optional<String> getShortScienceSearchURL(BibEntry entry) {
             return uriBuilder.toString();
         });
     }
+
+    /**
+     * Get a URL to the search results of Google Scholar for the BibEntry's title
+     *
+     * @param entry The entry to search for. Expects the BibEntry's title to be set for successful return.
+     * @return The URL if it was successfully created
+     */
+    public static Optional<String> getGoogleScholarSearchURL(BibEntry entry) {
+        return entry.getField(StandardField.TITLE).map(title -> {
+            URIBuilder uriBuilder;
+            try {
+                uriBuilder = new URIBuilder(GOOGLE_SCHOLAR_SEARCH_URL);
+            } catch (URISyntaxException e) {
+                // This should never be able to happen as it would require the field to be misconfigured.
+                throw new AssertionError("Google Scholar URL is invalid.", e);
+            }
+            // Direct the user to the search results for the title.
+            uriBuilder.addParameter("q", title);
+            return uriBuilder.toString();
+        });
+    }
 }

jablib/src/main/resources/l10n/JabRef_en.properties

@@ -2198,6 +2198,9 @@ Text\ editor=Text editor
 Search\ ShortScience=Search ShortScience
 Unable\ to\ open\ ShortScience.=Unable to open ShortScience.
 
+Search\ Google\ Scholar=Search Google Scholar
+Unable\ to\ open\ Google\ Scholar.=Unable to open Google Scholar.
+
 Shared\ database=Shared database
 Lookup=Lookup