Refactor URL handling to use BASE_URL across the application and add base_url context processor

core/base_url.py

@@ -0,0 +1,80 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+from typing import TYPE_CHECKING
+from urllib.parse import urlsplit
+
+from django.conf import settings
+
+if TYPE_CHECKING:
+    from django.http import HttpRequest
+
+
+def _get_base_url() -> str:
+    """Get normalized BASE_URL from settings.
+
+    Returns:
+        str: The configured BASE_URL without trailing slash.
+    """
+    base_url = getattr(settings, "BASE_URL", "")
+    return base_url.rstrip("/") if base_url else ""
+
+
+def build_absolute_uri(
+    location: str | None = None,
+    request: HttpRequest | None = None,
+) -> str:
+    """Build an absolute URI via BASE_URL (preferred) or request fallback.
+
+    Args:
+        location: Relative path ('/foo/') or absolute URL.
+        request: Optional HttpRequest to resolve path when location is None.
+
+    Returns:
+        str: Fully resolved absolute URL.
+    """
+    base_url = _get_base_url()
+
+    if location is None:
+        if request is not None:
+            location = request.get_full_path()
+        else:
+            return f"{base_url}/" if base_url else "/"
+
+    parsed = urlsplit(location)
+    if parsed.scheme and parsed.netloc:
+        return location
+
+    if base_url:
+        if location.startswith("/"):
+            return f"{base_url}{location}"
+        return f"{base_url}/{location.lstrip('/')}"
+
+    if request is not None:
+        return request.build_absolute_uri(location)
+
+    return location
+
+
+def is_secure() -> bool:
+    """Return whether the configured BASE_URL uses HTTPS."""
+    base_url = _get_base_url()
+    return base_url.startswith("https://") if base_url else False
+
+
+@dataclass
+class _TTVDropsSite:
+    domain: str
+
+
+def get_current_site(request: object) -> _TTVDropsSite:
+    """Return a site-like object with domain derived from BASE_URL."""
+    base_url = _get_base_url()
+    parts = urlsplit(base_url)
+    domain = parts.netloc or parts.path
+    return _TTVDropsSite(domain=domain)
+
+
+def apply_base_url_patches() -> None:
+    """No-op; use build_absolute_uri() helper explicitly."""
+    return