Move export and upload actions to admin dashboard

src/apps/backups/admin.py

@@ -1,7 +1,14 @@
 """Admin для приложения backups."""
 
 from apps.backups.models import BackupExportJob
+from apps.backups.serializers import BackupExportRequestSerializer
+from apps.backups.services import BackupExportError, BackupExportJobService
 from django.contrib import admin
+from django.contrib import messages
+from django.http import HttpResponse
+from django.shortcuts import redirect
+from django.urls import path, reverse
+from django.utils import timezone
 
 
 @admin.register(BackupExportJob)
@@ -36,3 +43,92 @@ class BackupExportJobAdmin(admin.ModelAdmin):
         "updated_at",
     ]
     ordering = ["-actual_date", "-created_at"]
+    change_list_template = "admin/backups/backupexportjob/change_list.html"
+
+    def get_urls(self):
+        urls = super().get_urls()
+        custom_urls = [
+            path(
+                "export/",
+                self.admin_site.admin_view(self.export_view),
+                name="backups_backupexportjob_export",
+            ),
+        ]
+        return custom_urls + urls
+
+    def changelist_view(self, request, extra_context=None):
+        extra_context = extra_context or {}
+        extra_context["backup_export_url"] = reverse(
+            "admin:backups_backupexportjob_export"
+        )
+        extra_context["backup_export_default_date"] = timezone.localdate().isoformat()
+        return super().changelist_view(request, extra_context=extra_context)
+
+    def export_view(self, request):
+        changelist_url = reverse("admin:backups_backupexportjob_changelist")
+
+        if request.method != "POST":
+            self.message_user(
+                request,
+                "Выгрузка backup доступна только через POST.",
+                level=messages.WARNING,
+            )
+            return redirect(changelist_url)
+
+        serializer = BackupExportRequestSerializer(
+            data={"actual_date": request.POST.get("actual_date")}
+        )
+        if not serializer.is_valid():
+            self.message_user(
+                request,
+                f"Некорректная дата: {serializer.errors}",
+                level=messages.ERROR,
+            )
+            return redirect(changelist_url)
+
+        actual_date = serializer.validated_data.get("actual_date") or timezone.localdate()
+        try:
+            result = BackupExportJobService.check_or_start_job(
+                actual_date=actual_date,
+                requested_by_id=request.user.id if request.user.is_authenticated else None,
+            )
+        except BackupExportError as exc:
+            self.message_user(request, f"Ошибка запуска резервного экспорта: {exc}", level=messages.ERROR)
+            return redirect(changelist_url)
+
+        if result.action in {"started", "wait"}:
+            self.message_user(
+                request,
+                result.message,
+                level=messages.INFO
+                if result.action == "started"
+                else messages.WARNING,
+            )
+            return redirect(changelist_url)
+
+        if result.action == "download":
+            try:
+                artifact = BackupExportJobService.consume_ready_archive(
+                    actual_date=result.actual_date
+                )
+            except BackupExportError as exc:
+                self.message_user(request, f"Ошибка загрузки backup: {exc}", level=messages.ERROR)
+                return redirect(changelist_url)
+
+            response = HttpResponse(artifact.archive_bytes, content_type="application/zip")
+            response.status_code = 200
+            response[
+                "Content-Disposition"
+            ] = f'attachment; filename="{artifact.archive_filename}"'
+            response["X-Backup-SHA256"] = artifact.checksum_sha256
+            response["X-Backup-Checksum-File"] = artifact.checksum_filename
+            response["X-Backup-Organizations"] = str(artifact.organizations_count)
+            response["X-Backup-Actual-Date"] = artifact.actual_date.isoformat()
+            return response
+
+        self.message_user(
+            request,
+            f"Неожиданный статус задачи: {result.action}",
+            level=messages.ERROR,
+        )
+        return redirect(changelist_url)