Fix : Importing .bib file shows correct message and imports groups associated (#12837)

* Fix #11025: Importing .bib file shows correct format message

* fix: OpenRewrite test issues

* fix: changed method 'determineExtensionFilter' to follow fail-fast principle

* Refactor: apply fail-fast principle in determineExtensionFilter and update JavaDoc

---------

Co-authored-by: Christoph <[email protected]>

Author: MiguelCBar

CHANGELOG.md

@@ -106,6 +106,7 @@ Note that this project **does not** adhere to [Semantic Versioning](https://semv
 - We fixed a bug where LaTeX commands were not removed from filenames generated using the `[bibtexkey] - [fulltitle]` pattern. [#12188](https://github.com/JabRef/jabref/issues/12188)
 - We fixed an issue where JabRef interface would not properly refresh after a group removal. [#11487](https://github.com/JabRef/jabref/issues/11487)
 - We fixed an issue where valid DOI could not be imported if it had special characters like `<` or `>`. [#12434](https://github.com/JabRef/jabref/issues/12434)
+- We fixed an issue where JabRef displayed an "unknown format" message when importing a .bib file, preventing the associated groups from being imported as well. [#11025](https://github.com/JabRef/jabref/issues/11025)
 - We fixed an issue where the tooltip only displayed the first linked file when hovering. [#12470](https://github.com/JabRef/jabref/issues/12470)
 - We fixed an issue where JabRef would crash when trying to display an entry in the Citation Relations tab that had right to left text. [#12410](https://github.com/JabRef/jabref/issues/12410)
 - We fixed an issue where some texts in the "Citation Information" tab and the "Preferences" dialog could not be translated. [#12883](https://github.com/JabRef/jabref/pull/12883)

src/main/java/org/jabref/gui/importer/ImportCommand.java

@@ -102,6 +102,10 @@ private void importSingleFile(Path file, SortedSet<Importer> importers, FileChoo
             return;
         }
 
+        if (selectedExtensionFilter == FileFilterConverter.ANY_FILE || "Available import formats".equals(selectedExtensionFilter.getDescription())) {
+            selectedExtensionFilter = FileFilterConverter.determineExtensionFilter(file);
+        }
+
         Optional<Importer> format = FileFilterConverter.getImporter(selectedExtensionFilter, importers);
         BackgroundTask<ParserResult> task = BackgroundTask.wrap(
                 () -> doImport(Collections.singletonList(file), format.orElse(null)));

src/main/java/org/jabref/gui/util/FileFilterConverter.java

@@ -16,6 +16,7 @@
 import org.jabref.logic.importer.Importer;
 import org.jabref.logic.l10n.Localization;
 import org.jabref.logic.util.FileType;
+import org.jabref.logic.util.StandardFileType;
 import org.jabref.logic.util.io.FileUtil;
 import org.jabref.model.strings.StringUtil;
 
@@ -36,6 +37,21 @@ public static FileChooser.ExtensionFilter toExtensionFilter(String description,
         return new FileChooser.ExtensionFilter(description, fileType.getExtensionsWithAsteriskAndDot());
     }
 
+    /**
+     * Determines the appropriate file extension filter based on the given file.
+     * If the file is recognized as a BibTeX file, it returns a BibTeX-specific extension filter.
+     * Otherwise, it returns a generic filter.
+     *
+     * @param file The file to check.
+     * @return The corresponding Extension Filter for the file type.
+     */
+    public static FileChooser.ExtensionFilter determineExtensionFilter(Path file) {
+        if (FileUtil.isBibFile(file)) {
+            return toExtensionFilter("BibTeX", StandardFileType.BIBTEX_DB);
+        }
+        return FileFilterConverter.ANY_FILE;
+    }
+
     public static Optional<Importer> getImporter(FileChooser.ExtensionFilter extensionFilter, Collection<Importer> importers) {
         return importers.stream().filter(importer -> importer.getName().equals(extensionFilter.getDescription())).findFirst();
     }