# Pleroma: A lightweight social networking server # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/> # SPDX-License-Identifier: AGPL-3.0-only defmodule Pleroma.Web.OStatus.ActivityRepresenter do alias Pleroma.Activity alias Pleroma.Object alias Pleroma.User alias Pleroma.Web.OStatus.UserRepresenter require Logger defp get_href(id) do with %Object{data: %{"external_url" => external_url}} <- Object.get_cached_by_ap_id(id) do external_url else _e -> id end end defp get_in_reply_to(activity) do with %Object{data: %{"inReplyTo" => in_reply_to}} <- Object.normalize(activity) do [ {:"thr:in-reply-to", [ref: to_charlist(in_reply_to), href: to_charlist(get_href(in_reply_to))], []} ] else _ -> [] end end defp get_mentions(to) do Enum.map(to, fn id -> cond do # Special handling for the AP/Ostatus public collections "https://www.w3.org/ns/activitystreams#Public" == id -> {:link, [ rel: "mentioned", "ostatus:object-type": "http://activitystrea.ms/schema/1.0/collection", href: "http://activityschema.org/collection/public" ], []} # Ostatus doesn't handle follower collections, ignore these. Regex.match?(~r/^#{Pleroma.Web.base_url()}.+followers$/, id) -> [] true -> {:link, [ rel: "mentioned", "ostatus:object-type": "http://activitystrea.ms/schema/1.0/person", href: id ], []} end end) end defp get_links(%{local: true}, %{"id" => object_id}) do h = fn str -> [to_charlist(str)] end [ {:link, [type: ['application/atom+xml'], href: h.(object_id), rel: 'self'], []}, {:link, [type: ['text/html'], href: h.(object_id), rel: 'alternate'], []} ] end defp get_links(%{local: false}, %{"external_url" => external_url}) do h = fn str -> [to_charlist(str)] end [ {:link, [type: ['text/html'], href: h.(external_url), rel: 'alternate'], []} ] end defp get_links(_activity, _object_data), do: [] defp get_emoji_links(emojis) do Enum.map(emojis, fn {emoji, file} -> {:link, [name: to_charlist(emoji), rel: 'emoji', href: to_charlist(file)], []} end) end def to_simple_form(activity, user, with_author \\ false) def to_simple_form(%{data: %{"type" => "Create"}} = activity, user, with_author) do h = fn str -> [to_charlist(str)] end object = Object.normalize(activity) updated_at = object.data["published"] inserted_at = object.data["published"] attachments = Enum.map(object.data["attachment"] || [], fn attachment -> url = hd(attachment["url"]) {:link, [rel: 'enclosure', href: to_charlist(url["href"]), type: to_charlist(url["mediaType"])], []} end) in_reply_to = get_in_reply_to(activity) author = if with_author, do: [{:author, UserRepresenter.to_simple_form(user)}], else: [] mentions = activity.recipients |> get_mentions categories = (object.data["tag"] || []) |> Enum.map(fn tag -> if is_binary(tag) do {:category, [term: to_charlist(tag)], []} else nil end end) |> Enum.filter(& &1) emoji_links = get_emoji_links(object.data["emoji"] || %{}) summary = if object.data["summary"] do [{:summary, [], h.(object.data["summary"])}] else [] end [ {:"activity:object-type", ['http://activitystrea.ms/schema/1.0/note']}, {:"activity:verb", ['http://activitystrea.ms/schema/1.0/post']}, # For notes, federate the object id. {:id, h.(object.data["id"])}, {:title, ['New note by #{user.nickname}']}, {:content, [type: 'html'], h.(object.data["content"] |> String.replace(~r/[\n\r]/, ""))}, {:published, h.(inserted_at)}, {:updated, h.(updated_at)}, {:"ostatus:conversation", [ref: h.(activity.data["context"])], h.(activity.data["context"])}, {:link, [ref: h.(activity.data["context"]), rel: 'ostatus:conversation'], []} ] ++ summary ++ get_links(activity, object.data) ++ categories ++ attachments ++ in_reply_to ++ author ++ mentions ++ emoji_links end def to_simple_form(%{data: %{"type" => "Like"}} = activity, user, with_author) do h = fn str -> [to_charlist(str)] end updated_at = activity.data["published"] inserted_at = activity.data["published"] author = if with_author, do: [{:author, UserRepresenter.to_simple_form(user)}], else: [] mentions = activity.recipients |> get_mentions [ {:"activity:verb", ['http://activitystrea.ms/schema/1.0/favorite']}, {:id, h.(activity.data["id"])}, {:title, ['New favorite by #{user.nickname}']}, {:content, [type: 'html'], ['#{user.nickname} favorited something']}, {:published, h.(inserted_at)}, {:updated, h.(updated_at)}, {:"activity:object", [ {:"activity:object-type", ['http://activitystrea.ms/schema/1.0/note']}, # For notes, federate the object id. {:id, h.(activity.data["object"])} ]}, {:"ostatus:conversation", [ref: h.(activity.data["context"])], h.(activity.data["context"])}, {:link, [ref: h.(activity.data["context"]), rel: 'ostatus:conversation'], []}, {:link, [rel: 'self', type: ['application/atom+xml'], href: h.(activity.data["id"])], []}, {:"thr:in-reply-to", [ref: to_charlist(activity.data["object"])], []} ] ++ author ++ mentions end def to_simple_form(%{data: %{"type" => "Announce"}} = activity, user, with_author) do h = fn str -> [to_charlist(str)] end updated_at = activity.data["published"] inserted_at = activity.data["published"] author = if with_author, do: [{:author, UserRepresenter.to_simple_form(user)}], else: [] retweeted_activity = Activity.get_create_by_object_ap_id(activity.data["object"]) retweeted_user = User.get_cached_by_ap_id(retweeted_activity.data["actor"]) retweeted_xml = to_simple_form(retweeted_activity, retweeted_user, true) mentions = ([retweeted_user.ap_id] ++ activity.recipients) |> Enum.uniq() |> get_mentions() [ {:"activity:object-type", ['http://activitystrea.ms/schema/1.0/activity']}, {:"activity:verb", ['http://activitystrea.ms/schema/1.0/share']}, {:id, h.(activity.data["id"])}, {:title, ['#{user.nickname} repeated a notice']}, {:content, [type: 'html'], ['RT #{retweeted_activity.data["object"]["content"]}']}, {:published, h.(inserted_at)}, {:updated, h.(updated_at)}, {:"ostatus:conversation", [ref: h.(activity.data["context"])], h.(activity.data["context"])}, {:link, [ref: h.(activity.data["context"]), rel: 'ostatus:conversation'], []}, {:link, [rel: 'self', type: ['application/atom+xml'], href: h.(activity.data["id"])], []}, {:"activity:object", retweeted_xml} ] ++ mentions ++ author end def to_simple_form(%{data: %{"type" => "Follow"}} = activity, user, with_author) do h = fn str -> [to_charlist(str)] end updated_at = activity.data["published"] inserted_at = activity.data["published"] author = if with_author, do: [{:author, UserRepresenter.to_simple_form(user)}], else: [] mentions = (activity.recipients || []) |> get_mentions [ {:"activity:object-type", ['http://activitystrea.ms/schema/1.0/activity']}, {:"activity:verb", ['http://activitystrea.ms/schema/1.0/follow']}, {:id, h.(activity.data["id"])}, {:title, ['#{user.nickname} started following #{activity.data["object"]}']}, {:content, [type: 'html'], ['#{user.nickname} started following #{activity.data["object"]}']}, {:published, h.(inserted_at)}, {:updated, h.(updated_at)}, {:"activity:object", [ {:"activity:object-type", ['http://activitystrea.ms/schema/1.0/person']}, {:id, h.(activity.data["object"])}, {:uri, h.(activity.data["object"])} ]}, {:link, [rel: 'self', type: ['application/atom+xml'], href: h.(activity.data["id"])], []} ] ++ mentions ++ author end # Only undos of follow for now. Will need to get redone once there are more def to_simple_form( %{data: %{"type" => "Undo", "object" => %{"type" => "Follow"} = follow_activity}} = activity, user, with_author ) do h = fn str -> [to_charlist(str)] end updated_at = activity.data["published"] inserted_at = activity.data["published"] author = if with_author, do: [{:author, UserRepresenter.to_simple_form(user)}], else: [] mentions = (activity.recipients || []) |> get_mentions follow_activity = Activity.normalize(follow_activity) [ {:"activity:object-type", ['http://activitystrea.ms/schema/1.0/activity']}, {:"activity:verb", ['http://activitystrea.ms/schema/1.0/unfollow']}, {:id, h.(activity.data["id"])}, {:title, ['#{user.nickname} stopped following #{follow_activity.data["object"]}']}, {:content, [type: 'html'], ['#{user.nickname} stopped following #{follow_activity.data["object"]}']}, {:published, h.(inserted_at)}, {:updated, h.(updated_at)}, {:"activity:object", [ {:"activity:object-type", ['http://activitystrea.ms/schema/1.0/person']}, {:id, h.(follow_activity.data["object"])}, {:uri, h.(follow_activity.data["object"])} ]}, {:link, [rel: 'self', type: ['application/atom+xml'], href: h.(activity.data["id"])], []} ] ++ mentions ++ author end def to_simple_form(%{data: %{"type" => "Delete"}} = activity, user, with_author) do h = fn str -> [to_charlist(str)] end updated_at = activity.data["published"] inserted_at = activity.data["published"] author = if with_author, do: [{:author, UserRepresenter.to_simple_form(user)}], else: [] [ {:"activity:object-type", ['http://activitystrea.ms/schema/1.0/activity']}, {:"activity:verb", ['http://activitystrea.ms/schema/1.0/delete']}, {:id, h.(activity.data["object"])}, {:title, ['An object was deleted']}, {:content, [type: 'html'], ['An object was deleted']}, {:published, h.(inserted_at)}, {:updated, h.(updated_at)} ] ++ author end def to_simple_form(_, _, _), do: nil def wrap_with_entry(simple_form) do [ { :entry, [ xmlns: 'http://www.w3.org/2005/Atom', "xmlns:thr": 'http://purl.org/syndication/thread/1.0', "xmlns:activity": 'http://activitystrea.ms/spec/1.0/', "xmlns:poco": 'http://portablecontacts.net/spec/1.0', "xmlns:ostatus": 'http://ostatus.org/schema/1.0' ], simple_form } ] end end