set_length own function

api/advent22_api/routers/_misc.py

@@ -10,11 +10,12 @@ async def get_loesungswort() -> str:
     return fp.read().decode("utf8").strip()
 
 
-async def shuffle(seq: Sequence, length: int | None = None) -> list:
+
+async def set_length(seq: Sequence, length: int) -> list:
+    infinite = itertools.cycle(seq)
+    return list(itertools.islice(infinite, length))
+
+
+async def shuffle(seq: Sequence) -> list:
     rnd = random.Random(await get_loesungswort())
-
-    if length is not None:
-        infinity = itertools.cycle(seq)
-        seq = list(itertools.islice(infinity, length))
-
     return rnd.sample(seq, len(seq))

api/advent22_api/routers/days.py

@@ -10,7 +10,7 @@ from PIL import ImageDraw, ImageFont
 
 from ..dav_common import dav_get_file, dav_list_files
 from ._image import AdventImage
-from ._misc import shuffle
+from ._misc import set_length, shuffle
 
 router = APIRouter(prefix="/days", tags=["days"])
 
@@ -61,8 +61,16 @@ _RE_IMAGE_FILE = re.compile(
 )
 
 
+async def get_images() -> list[str]:
+    ls = await dav_list_files(_RE_IMAGE_FILE, "/images")
+    ls = await set_length(ls, 24)
+
+    return await shuffle(ls)
+
+
 async def load_image(
     index: int,
+    images: list[str] = Depends(get_images),
 ) -> AdventImage:
     """
     Bild laden und einen quadratischen Ausschnitt
@@ -70,10 +78,7 @@ async def load_image(
     """
 
     # Bild laden
-    rnd = random.Random(f"{loesungswort}{index}")
-    dat = rnd.choice(await dav_list_files(_RE_IMAGE_FILE, "/images"))
-
-    img_buffer = await dav_get_file(dat)
+    img_buffer = await dav_get_file(images[index])
     return await AdventImage.load_standard(img_buffer)