Fix random next bug

main.py

@@ -29,7 +29,9 @@ security = HTTPBasic()
 expected_password: str | None = None
 
 
-async def get_current_username(credentials: Annotated[HTTPBasicCredentials, Depends(security)]) -> str:
+async def get_current_username(
+    credentials: Annotated[HTTPBasicCredentials, Depends(security)],
+) -> str:
     """Verify Basic Authentication credentials"""
     if expected_password is not None and credentials.password != expected_password:
         raise HTTPException(
@@ -187,7 +189,9 @@ async def root(username: str = Depends(get_current_username)):
 
 
 @app.get("/{order}/{delay}")
-async def order_delay(order: str, delay: int, username: str = Depends(get_current_username)):
+async def order_delay(
+    order: str, delay: int, username: str = Depends(get_current_username)
+):
     """Redirect to random file with order and delay"""
     random_hash = _get_random_hash()
     return RedirectResponse(
@@ -195,13 +199,27 @@ async def order_delay(order: str, delay: int, username: str = Depends(get_curren
     )
 
 
-def _get_navigation_data(file_hash: str):
-    """Get navigation data for a file hash"""
+def _get_navigation_data(file_hash: str, order: str | None = None):
+    """Get navigation data for a file hash.
+
+    Args:
+        file_hash: The current file's hash.
+        order: Navigation order - 'next' for sequential, 'random' for random,
+               or None for default browse mode.
+
+    Returns:
+        Dictionary with navigation hashes and filename.
+    """
     keys = list(file_mapping.keys())
     idx = keys.index(file_hash)
+
+    if order == "random":
+        next_hash = _get_random_hash()
+        prev_hash = _get_random_hash()
+    else:
         next_hash = keys[(idx + 1) % len(keys)]
         prev_hash = keys[idx - 1] if idx > 0 else keys[-1]
-    next_random_hash = _get_random_hash()
+
     indexer = _find_indexer_for_hash(file_hash)
     filename = indexer.get_filename_by_hash(file_hash) if indexer else ""
 
@@ -209,7 +227,6 @@ def _get_navigation_data(file_hash: str):
         "file_hash": file_hash,
         "next_hash": next_hash,
         "prev_hash": prev_hash,
-        "next_random_hash": next_random_hash,
         "filename": filename,
     }
 
@@ -248,10 +265,7 @@ def _render_page(
 
     content = template.substitute(
         img_url="/api/{file_hash}/data".format(file_hash=navigation_data["file_hash"]),
-        image_click_url=image_click_url
-        or "/{next_random_hash}".format(
-            next_random_hash=navigation_data["next_random_hash"]
-        ),
+        image_click_url=image_click_url or _get_random_hash(),
         next_url=next_url,
         prev_url=prev_url,
         filename=navigation_data["filename"],
@@ -268,7 +282,7 @@ async def hash_page(file_hash: str, username: str = Depends(get_current_username
     if file_hash not in file_mapping:
         raise HTTPException(status_code=404, detail="File not found")
 
-    navigation_data = _get_navigation_data(file_hash)
+    navigation_data = _get_navigation_data(file_hash, order=None)
     play_button = '<a href="/next/5/{file_hash}" class="play-btn" title="Play next 5">⏵</a>'.format(
         file_hash=file_hash
     )
@@ -278,7 +292,12 @@ async def hash_page(file_hash: str, username: str = Depends(get_current_username
 
 
 @app.get("/{order}/{delay}/{file_hash}")
-async def hash_page_with_refresh(order: str, delay: int, file_hash: str, username: str = Depends(get_current_username)):
+async def hash_page_with_refresh(
+    order: str,
+    delay: int,
+    file_hash: str,
+    username: str = Depends(get_current_username),
+):
     """Serve a page for a specific file hash with auto-refresh navigation"""
     if file_hash not in file_mapping:
         raise HTTPException(status_code=404, detail="File not found")
@@ -288,18 +307,11 @@ async def hash_page_with_refresh(order: str, delay: int, file_hash: str, usernam
             status_code=400, detail="Invalid order. Must be 'next' or 'random'"
         )
 
-    navigation_data = _get_navigation_data(file_hash)
+    navigation_data = _get_navigation_data(file_hash, order=order)
 
-    if order == "next":
     refresh_url = "/{order}/{delay}/{next_hash}".format(
         order=order, delay=delay, next_hash=navigation_data["next_hash"]
     )
-    else:
-        refresh_url = "/{order}/{delay}/{next_random_hash}".format(
-            order=order,
-            delay=delay,
-            next_random_hash=navigation_data["next_random_hash"],
-        )
 
     refresh_meta = f'<meta http-equiv="refresh" content="{delay};url={refresh_url}">'
     image_click_url = "/{file_hash}".format(file_hash=file_hash)
@@ -347,7 +359,9 @@ if __name__ == "__main__":
     parser.add_argument(
         "--salt", type=str, default=None, help="Salt for hashing file paths"
     )
-    parser.add_argument("--password", type=str, default=None, help="Password for Basic Authentication")
+    parser.add_argument(
+        "--password", type=str, default=None, help="Password for Basic Authentication"
+    )
     args = parser.parse_args()
 
     initialize_server(args)