Initial commit

yksa_kit/views.py

@@ -0,0 +1,97 @@
+"""Project-level views every service exposes: health, timezone, legal pages."""
+
+from __future__ import annotations
+
+from functools import lru_cache
+from zoneinfo import available_timezones
+
+from django.contrib import messages
+from django.db import connection
+from django.http import JsonResponse
+from django.shortcuts import redirect, render
+from django.urls import reverse
+from django.utils import timezone
+from django.utils.http import url_has_allowed_host_and_scheme
+from django.utils.translation import gettext as _
+
+from .context_processors import DEFAULT_COMMON_TIMEZONES
+
+
+@lru_cache(maxsize=1)
+def _timezone_name_options():
+    try:
+        names = sorted(available_timezones())
+    except Exception:
+        names = list(DEFAULT_COMMON_TIMEZONES)
+
+    preferred = ["UTC", "Europe/Moscow", "Asia/Yakutsk"]
+    ordered = [n for n in preferred if n in names]
+    ordered += [n for n in names if n not in ordered]
+    return ordered
+
+
+def _safe_next_url(request, candidate):
+    if candidate and url_has_allowed_host_and_scheme(
+        candidate,
+        allowed_hosts={request.get_host()},
+        require_https=request.is_secure(),
+    ):
+        return candidate
+    return reverse("timezone-preferences")
+
+
+def privacy_policy(request):
+    return render(request, "privacy_policy.html")
+
+
+def cookie_policy(request):
+    return render(request, "cookie_policy.html")
+
+
+def timezone_preferences(request):
+    timezone_names = _timezone_name_options()
+    timezone_set = set(timezone_names)
+
+    selected_timezone = request.session.get("user_timezone", "UTC")
+    if selected_timezone not in timezone_set:
+        selected_timezone = "UTC"
+
+    if request.method == "POST":
+        selected_timezone = (request.POST.get("timezone") or "UTC").strip()
+        if selected_timezone not in timezone_set:
+            messages.error(request, _("Selected time zone is not supported."))
+        else:
+            request.session["user_timezone"] = selected_timezone
+            request.session.modified = True
+            messages.success(request, _("Time zone preference saved."))
+            return redirect(_safe_next_url(request, request.POST.get("next")))
+
+    return render(request, "timezone_preferences.html", {
+        "timezone_names": timezone_names,
+        "selected_timezone": selected_timezone,
+        "next_url": _safe_next_url(
+            request, request.GET.get("next") or request.META.get("HTTP_REFERER"),
+        ),
+    })
+
+
+def health_check(request):
+    """Swarm healthcheck target: it must answer without a database, not raise."""
+    try:
+        with connection.cursor() as cursor:
+            cursor.execute("SELECT 1")
+        return JsonResponse({
+            "status": "healthy",
+            "timestamp": timezone.now().isoformat(),
+            "database": "connected",
+        })
+    except Exception as exc:
+        return JsonResponse(
+            {
+                "status": "unhealthy",
+                "timestamp": timezone.now().isoformat(),
+                "database": "disconnected",
+                "error": str(exc),
+            },
+            status=503,
+        )