defmodule Pleroma.Web.OStatus.NoteHandler do require Logger alias Pleroma.Web.{XML, OStatus} alias Pleroma.{Object, User, Activity} alias Pleroma.Web.ActivityPub.ActivityPub alias Pleroma.Web.ActivityPub.Utils alias Pleroma.Web.CommonAPI @doc """ Get the context for this note. Uses this: 1. The context of the parent activity 2. The conversation reference in the ostatus xml 3. A newly generated context id. """ def get_context(entry, inReplyTo) do context = ( XML.string_from_xpath("//ostatus:conversation[1]", entry) || XML.string_from_xpath("//ostatus:conversation[1]/@ref", entry) || "") |> String.trim with %{data: %{"context" => context}} <- Object.get_cached_by_ap_id(inReplyTo) do context else _e -> if String.length(context) > 0 do context else Utils.generate_context_id end end end def get_people_mentions(entry) do :xmerl_xpath.string('//link[@rel="mentioned" and @ostatus:object-type="http://activitystrea.ms/schema/1.0/person"]', entry) |> Enum.map(fn(person) -> XML.string_from_xpath("@href", person) end) end def get_collection_mentions(entry) do transmogrify = fn ("http://activityschema.org/collection/public") -> "https://www.w3.org/ns/activitystreams#Public" (group) -> group end :xmerl_xpath.string('//link[@rel="mentioned" and @ostatus:object-type="http://activitystrea.ms/schema/1.0/collection"]', entry) |> Enum.map(fn(collection) -> XML.string_from_xpath("@href", collection) |> transmogrify.() end) end def get_mentions(entry) do (get_people_mentions(entry) ++ get_collection_mentions(entry)) |> Enum.filter(&(&1)) end def get_emoji(entry) do try do :xmerl_xpath.string('//link[@rel="emoji"]', entry) |> Enum.reduce(%{}, fn(emoji, acc) -> Map.put(acc, XML.string_from_xpath("@name", emoji), XML.string_from_xpath("@href", emoji)) end) rescue _e -> nil end end def make_to_list(actor, mentions) do [ actor.follower_address ] ++ mentions end def add_external_url(note, entry) do url = XML.string_from_xpath("//link[@rel='alternate' and @type='text/html']/@href", entry) Map.put(note, "external_url", url) end def fetch_replied_to_activity(entry, inReplyTo) do with %Activity{} = activity <- Activity.get_create_activity_by_object_ap_id(inReplyTo) do activity else _e -> with inReplyToHref when not is_nil(inReplyToHref) <- XML.string_from_xpath("//thr:in-reply-to[1]/@href", entry), {:ok, [activity | _]} <- OStatus.fetch_activity_from_url(inReplyToHref) do activity else _e -> nil end end end def handle_note(entry, doc \\ nil) do with id <- XML.string_from_xpath("//id", entry), activity when is_nil(activity) <- Activity.get_create_activity_by_object_ap_id(id), [author] <- :xmerl_xpath.string('//author[1]', doc), {:ok, actor} <- OStatus.find_make_or_update_user(author), content_html <- OStatus.get_content(entry), inReplyTo <- XML.string_from_xpath("//thr:in-reply-to[1]/@ref", entry), inReplyToActivity <- fetch_replied_to_activity(entry, inReplyTo), inReplyTo <- (inReplyToActivity && inReplyToActivity.data["object"]["id"]) || inReplyTo, attachments <- OStatus.get_attachments(entry), context <- get_context(entry, inReplyTo), tags <- OStatus.get_tags(entry), mentions <- get_mentions(entry), to <- make_to_list(actor, mentions), date <- XML.string_from_xpath("//published", entry), note <- CommonAPI.Utils.make_note_data(actor.ap_id, to, context, content_html, attachments, inReplyToActivity, []), note <- note |> Map.put("id", id) |> Map.put("tag", tags), note <- note |> Map.put("published", date), note <- note |> Map.put("emoji", get_emoji(entry)), note <- add_external_url(note, entry), # TODO: Handle this case in make_note_data note <- (if inReplyTo && !inReplyToActivity, do: note |> Map.put("inReplyTo", inReplyTo), else: note) do res = ActivityPub.create(to, actor, context, note, %{}, date, false) User.increase_note_count(actor) res else %Activity{} = activity -> {:ok, activity} e -> {:error, e} end end end