Configure locatoion of cache dir

.gitignore

@@ -1 +1,2 @@
 __pycache__/
+.*

config.py

@@ -1,2 +1,3 @@
 imgdir = "."
 refresh = 5
+cachedir = ".webslider"

slider.py

@@ -18,15 +18,16 @@ def random():
 
 @app.route("/random_image/")
 def random_image():
+    img_glob = "*jpg"
     imgdir = Path(config.imgdir)
     last_modified_time, last_modified_file = max(
-        (f.stat().st_mtime, f) for f in imgdir.glob("*.jpg")
+        (f.stat().st_mtime, f) for f in imgdir.glob(img_glob)
     )
 
     if time() - last_modified_time <= 60:
         selected_image = last_modified_file.relative_to(imgdir)
     else:
-        images = list(imgdir.glob("*.jpg"))
+        images = list(imgdir.glob(img_glob))
         selected_image = choice(images).relative_to(imgdir)
 
     return redirect(url_for("image", filename=selected_image))
@@ -34,17 +35,18 @@ def random_image():
 
 @app.route("/img/<path:filename>")
 def image(filename):
-    scaled_img_dir = Path(config.imgdir) / ".slider" / "fhd"
+    cache_resolution = (1920, 1080)
+    cache_dir = Path(config.cachedir) / ("%sx%s" % cache_resolution)
 
-    if not scaled_img_dir.exists():
-        scaled_img_dir.mkdir(parents=True)
+    if not cache_dir.exists():
+        cache_dir.mkdir(parents=True)
 
-    if not (scaled_img_dir / filename).exists():
+    if not (cache_dir / filename).exists():
         img = Image.open(Path(config.imgdir) / filename)
-        img.thumbnail((1920, 1080))
-        img.save(scaled_img_dir / filename)
+        img.thumbnail(cache_resolution)
+        img.save(cache_dir / filename)
 
-    return send_from_directory(scaled_img_dir, filename)
+    return send_from_directory(cache_dir, filename)
 
 
 if __name__ == "__main__":