git.squeep.com Git - akkoma/blob - lib/pleroma/web/ostatus/ostatus.ex

   1 defmodule Pleroma.Web.OStatus do
   2   import Ecto.Query
   3   import Pleroma.Web.XML
   4   require Logger
   5
   6   alias Pleroma.{Repo, User, Web, Object}
   7   alias Pleroma.Web.ActivityPub.ActivityPub
   8   alias Pleroma.Web.{WebFinger, Websub}
   9
  10   def feed_path(user) do
  11     "#{user.ap_id}/feed.atom"
  12   end
  13
  14   def pubsub_path(user) do
  15     "#{Web.base_url}/push/hub/#{user.nickname}"
  16   end
  17
  18   def salmon_path(user) do
  19     "#{user.ap_id}/salmon"
  20   end
  21
  22   def handle_incoming(xml_string) do
  23     doc = parse_document(xml_string)
  24     entries = :xmerl_xpath.string('//entry', doc)
  25
  26     activities = Enum.map(entries, fn (entry) ->
  27       {:xmlObj, :string, object_type } = :xmerl_xpath.string('string(/entry/activity:object-type[1])', entry)
  28
  29       case object_type do
  30         'http://activitystrea.ms/schema/1.0/note' ->
  31           with {:ok, activity} <- handle_note(entry, doc), do: activity
  32         'http://activitystrea.ms/schema/1.0/comment' ->
  33           with {:ok, activity} <- handle_note(entry, doc), do: activity
  34         _ ->
  35           Logger.error("Couldn't parse incoming document")
  36           nil
  37       end
  38     end)
  39     {:ok, activities}
  40   end
  41
  42   def handle_note(entry, doc \\ nil) do
  43     content_html = string_from_xpath("/entry/content[1]", entry)
  44
  45     [author] = :xmerl_xpath.string('//author[1]', doc)
  46     {:ok, actor} = find_make_or_update_user(author)
  47     inReplyTo = string_from_xpath("/entry/thr:in-reply-to[1]/@ref", entry)
  48
  49     context = (string_from_xpath("/entry/ostatus:conversation[1]", entry) || "") |> String.trim
  50
  51     context = with %{data: %{"context" => context}} <- Object.get_cached_by_ap_id(inReplyTo) do
  52                 context
  53               else _e ->
  54                 if String.length(context) > 0 do
  55                   context
  56                 else
  57                   ActivityPub.generate_context_id
  58                 end
  59               end
  60
  61     to = [
  62       "https://www.w3.org/ns/activitystreams#Public"
  63     ]
  64
  65     mentions = :xmerl_xpath.string('/entry/link[@rel="mentioned" and @ostatus:object-type="http://activitystrea.ms/schema/1.0/person"]', entry)
  66     |> Enum.map(fn(person) -> string_from_xpath("@href", person) end)
  67
  68     to = to ++ mentions
  69
  70     date = string_from_xpath("/entry/published", entry)
  71     id = string_from_xpath("/entry/id", entry)
  72
  73     object = %{
  74       "id" => id,
  75       "type" => "Note",
  76       "to" => to,
  77       "content" => content_html,
  78       "published" => date,
  79       "context" => context,
  80       "actor" => actor.ap_id
  81     }
  82
  83     object = if inReplyTo do
  84       Map.put(object, "inReplyTo", inReplyTo)
  85     else
  86       object
  87     end
  88
  89     # TODO: Bail out sooner and use transaction.
  90     if Object.get_by_ap_id(id) do
  91       {:error, "duplicate activity"}
  92     else
  93       ActivityPub.create(to, actor, context, object, %{}, date, false)
  94     end
  95   end
  96
  97   def find_make_or_update_user(doc) do
  98     uri = string_from_xpath("//author/uri[1]", doc)
  99     with {:ok, user} <- find_or_make_user(uri) do
 100       avatar = make_avatar_object(doc)
 101       if user.avatar != avatar do
 102         change = Ecto.Changeset.change(user, %{avatar: avatar})
 103         Repo.update(change)
 104       else
 105         {:ok, user}
 106       end
 107     end
 108   end
 109
 110   def find_or_make_user(uri) do
 111     query = from user in User,
 112       where: user.local == false and fragment("? @> ?", user.info, ^%{uri: uri})
 113
 114     user = Repo.one(query)
 115
 116     if is_nil(user) do
 117       make_user(uri)
 118     else
 119       {:ok, user}
 120     end
 121   end
 122
 123   def make_user(uri) do
 124     with {:ok, info} <- gather_user_info(uri) do
 125       data = %{
 126         local: false,
 127         name: info.name,
 128         nickname: info.nickname <> "@" <> info.host,
 129         ap_id: info.uri,
 130         info: info,
 131         avatar: info.avatar
 132       }
 133       # TODO: Make remote user changeset
 134       # SHould enforce fqn nickname
 135       Repo.insert(Ecto.Changeset.change(%User{}, data))
 136     end
 137   end
 138
 139   # TODO: Just takes the first one for now.
 140   def make_avatar_object(author_doc) do
 141     href = string_from_xpath("//author[1]/link[@rel=\"avatar\"]/@href", author_doc)
 142     type = string_from_xpath("//author[1]/link[@rel=\"avatar\"]/@type", author_doc)
 143
 144     if href do
 145       %{
 146         "type" => "Image",
 147         "url" =>
 148           [%{
 149               "type" => "Link",
 150               "mediaType" => type,
 151               "href" => href
 152            }]
 153       }
 154     else
 155       nil
 156     end
 157   end
 158
 159   def gather_user_info(username) do
 160     with {:ok, webfinger_data} <- WebFinger.finger(username),
 161          {:ok, feed_data} <- Websub.gather_feed_data(webfinger_data.topic) do
 162       {:ok, Map.merge(webfinger_data, feed_data) |> Map.put(:fqn, username)}
 163     else e ->
 164       Logger.debug("Couldn't gather info for #{username}")
 165       {:error, e}
 166     end
 167   end
 168 end