+ @behaviour Pleroma.Web.ActivityPub.MRF.PipelineFiltering
+
+ @mrf_config_descriptions [
+ %{
+ group: :pleroma,
+ key: :mrf,
+ tab: :mrf,
+ label: "MRF",
+ type: :group,
+ description: "General MRF settings",
+ children: [
+ %{
+ key: :policies,
+ type: [:module, {:list, :module}],
+ description:
+ "A list of MRF policies enabled. Module names are shortened (removed leading `Pleroma.Web.ActivityPub.MRF.` part), but on adding custom module you need to use full name.",
+ suggestions: {:list_behaviour_implementations, Pleroma.Web.ActivityPub.MRF.Policy}
+ },
+ %{
+ key: :transparency,
+ label: "MRF transparency",
+ type: :boolean,
+ description:
+ "Make the content of your Message Rewrite Facility settings public (via nodeinfo)"
+ },
+ %{
+ key: :transparency_exclusions,
+ label: "MRF transparency exclusions",
+ type: {:list, :tuple},
+ key_placeholder: "instance",
+ value_placeholder: "reason",
+ description:
+ "Exclude specific instance names from MRF transparency. The use of the exclusions feature will be disclosed in nodeinfo as a boolean value. You can also provide a reason for excluding these instance names. The instances and reasons won't be publicly disclosed.",
+ suggestions: [
+ "exclusion.com"
+ ]
+ },
+ %{
+ key: :transparency_obfuscate_domains,
+ label: "MRF domain obfuscation",
+ type: {:list, :string},
+ description:
+ "Obfuscate domains in MRF transparency. This is useful if the domain you're blocking contains words you don't want displayed, but still want to disclose the MRF settings.",
+ suggestions: [
+ "badword.com"
+ ]
+ }
+ ]
+ }
+ ]
+
+ @default_description %{
+ label: "",
+ description: ""
+ }
+
+ @required_description_keys [:key, :related_policy]
+
+ def filter_one(policy, %{"type" => type} = message)
+ when type in ["Undo", "Block", "Delete"] and
+ policy != Pleroma.Web.ActivityPub.MRF.SimplePolicy do
+ {:ok, message}
+ end
+
+ def filter_one(policy, message) do
+ should_plug_history? =
+ if function_exported?(policy, :history_awareness, 0) do
+ policy.history_awareness()
+ else
+ :manual
+ end
+ |> Kernel.==(:auto)
+
+ if not should_plug_history? do
+ policy.filter(message)
+ else
+ main_result = policy.filter(message)
+
+ with {_, {:ok, main_message}} <- {:main, main_result},
+ {_,
+ %{
+ "formerRepresentations" => %{
+ "orderedItems" => [_ | _]
+ }
+ }} = {_, object} <- {:object, message["object"]},
+ {_, {:ok, new_history}} <-
+ {:history,
+ Pleroma.Object.Updater.for_each_history_item(
+ object["formerRepresentations"],
+ object,
+ fn item ->
+ with {:ok, filtered} <- policy.filter(Map.put(message, "object", item)) do
+ {:ok, filtered["object"]}
+ else
+ e -> e
+ end
+ end
+ )} do
+ {:ok, put_in(main_message, ["object", "formerRepresentations"], new_history)}
+ else
+ {:main, _} -> main_result
+ {:object, _} -> main_result
+ {:history, e} -> e
+ end
+ end
+ end
+
+ def filter(policies, %{} = message) do