admin view for user imports

- makes user_import_time_limit a site setting rather than a value in settings.py (note this applies to exports as well as imports)
- admins can change user_import_time_limit from UI
- admins can cancel stuck user imports
- disabling new imports also disables user imports

bookwyrm/views/admin/imports.py

@@ -40,9 +40,17 @@ class ImportList(View):
         paginated = Paginator(imports, PAGE_LENGTH)
         page = paginated.get_page(request.GET.get("page"))
 
+        user_imports = models.BookwyrmImportJob.objects.filter(complete=complete).order_by(
+            "created_date"
+        )
+
+        user_paginated = Paginator(user_imports, PAGE_LENGTH)
+        user_page = user_paginated.get_page(request.GET.get("page"))
+
         site_settings = models.SiteSettings.objects.get()
         data = {
             "imports": page,
+            "user_imports": user_page,
             "page_range": paginated.get_elided_page_range(
                 page.number, on_each_side=2, on_ends=1
             ),
@@ -50,6 +58,7 @@ class ImportList(View):
             "sort": sort,
             "import_size_limit": site_settings.import_size_limit,
             "import_limit_reset": site_settings.import_limit_reset,
+            "user_import_time_limit": site_settings.user_import_time_limit,
         }
         return TemplateResponse(request, "settings/imports/imports.html", data)
 
@@ -95,3 +104,24 @@ def set_import_size_limit(request):
     site.import_limit_reset = import_limit_reset
     site.save(update_fields=["import_size_limit", "import_limit_reset"])
     return redirect("settings-imports")
+
+@require_POST
+@login_required
+@permission_required("bookwyrm.moderate_user", raise_exception=True)
+# pylint: disable=unused-argument
+def set_user_import_completed(request, import_id):
+    """Mark a user import as complete"""
+    import_job = get_object_or_404(models.BookwyrmImportJob, id=import_id)
+    import_job.stop_job()
+    return redirect("settings-imports")
+
+
+@require_POST
+@permission_required("bookwyrm.edit_instance_settings", raise_exception=True)
+# pylint: disable=unused-argument
+def set_user_import_limit(request):
+    """Limit how ofter users can import and export their account"""
+    site = models.SiteSettings.objects.get()
+    site.user_import_time_limit = int(request.POST.get("limit"))
+    site.save(update_fields=["user_import_time_limit"])
+    return redirect("settings-imports")