Update app.py

app.py

@@ -248,12 +248,17 @@ class PaperDownloader:
 
         downloaded_files = []
         failed_dois = []
-        for doi in tqdm(dois, desc="Downloading papers"):
-             filepath, success_message, fail_message = self.download_single_doi(doi)
-             if filepath:
-                 downloaded_files.append(filepath)
-             else:
-                 failed_dois.append(doi)
+        for i, doi in enumerate(tqdm(dois, desc="Downloading papers")):
+            filepath, success_message, fail_message = self.download_single_doi(doi)
+            if filepath:
+              # Unique filename for zip
+              filename = f"{str(doi).replace('/', '_').replace('.', '_')}_{i}.pdf"
+              filepath_unique = os.path.join(self.output_dir, filename)
+              os.rename(filepath,filepath_unique)
+              downloaded_files.append(filepath_unique)
+            else:
+               failed_dois.append(doi)
+
 
         if downloaded_files:
             zip_filename = 'papers.zip'
@@ -338,7 +343,7 @@ def create_gradio_interface():
             if not bib_file.name.lower().endswith('.bib'):
                 return None, "Error: Please upload a .bib file", "Error: Please upload a .bib file", None
 
-            zip_path, downloaded_dois, failed_dois = downloader.process_bibtex(bib_file)
+            zip_path, downloaded_dois, failed_dois, _ = downloader.process_bibtex(bib_file)
             return zip_path, downloaded_dois, failed_dois, None
         elif doi_input:
             filepath, message, failed_doi = downloader.download_single_doi(doi_input)
@@ -386,7 +391,7 @@ def create_gradio_interface():
             box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
         }
         """,
-        cache_examples=False
+        cache_examples = False
     )
 
     return interface