1 defmodule Pleroma.Web.OStatus do
2 @httpoison Application.get_env(:pleroma, :httpoison)
8 alias Pleroma.{Repo, User, Web, Object, Activity}
9 alias Pleroma.Web.ActivityPub.ActivityPub
10 alias Pleroma.Web.{WebFinger, Websub}
12 def feed_path(user) do
13 "#{user.ap_id}/feed.atom"
16 def pubsub_path(user) do
17 "#{Web.base_url}/push/hub/#{user.nickname}"
20 def salmon_path(user) do
21 "#{user.ap_id}/salmon"
24 def handle_incoming(xml_string) do
25 doc = parse_document(xml_string)
26 entries = :xmerl_xpath.string('//entry', doc)
28 activities = Enum.map(entries, fn (entry) ->
29 {:xmlObj, :string, object_type} = :xmerl_xpath.string('string(/entry/activity:object-type[1])', entry)
30 {:xmlObj, :string, verb} = :xmerl_xpath.string('string(/entry/activity:verb[1])', entry)
33 'http://activitystrea.ms/schema/1.0/share' ->
34 with {:ok, activity, retweeted_activity} <- handle_share(entry, doc), do: [activity, retweeted_activity]
35 'http://activitystrea.ms/schema/1.0/favorite' ->
36 with {:ok, activity, favorited_activity} <- handle_favorite(entry, doc), do: [activity, favorited_activity]
39 'http://activitystrea.ms/schema/1.0/note' ->
40 with {:ok, activity} <- handle_note(entry, doc), do: activity
41 'http://activitystrea.ms/schema/1.0/comment' ->
42 with {:ok, activity} <- handle_note(entry, doc), do: activity
44 Logger.error("Couldn't parse incoming document")
52 def make_share(_entry, doc, retweeted_activity) do
53 with {:ok, actor} <- find_make_or_update_user(doc),
54 %Object{} = object <- Object.get_cached_by_ap_id(retweeted_activity.data["object"]["id"]),
55 {:ok, activity, _object} = ActivityPub.announce(actor, object, false) do
60 def handle_share(entry, doc) do
61 with [object] <- :xmerl_xpath.string('/entry/activity:object', entry),
62 {:ok, retweeted_activity} <- handle_note(object, object),
63 {:ok, activity} <- make_share(entry, doc, retweeted_activity) do
64 {:ok, activity, retweeted_activity}
70 def make_favorite(_entry, doc, favorited_activity) do
71 with {:ok, actor} <- find_make_or_update_user(doc),
72 %Object{} = object <- Object.get_cached_by_ap_id(favorited_activity.data["object"]["id"]),
73 {:ok, activity, _object} = ActivityPub.like(actor, object, false) do
78 def get_or_try_fetching(entry) do
79 with id when not is_nil(id) <- string_from_xpath("//activity:object[1]/id", entry),
80 %Activity{} = activity <- Activity.get_create_activity_by_object_ap_id(id) do
83 with href when not is_nil(href) <- string_from_xpath("//activity:object[1]/link[@type=\"text/html\"]/@href", entry),
84 {:ok, [favorited_activity]} <- fetch_activity_from_html_url(href) do
85 {:ok, favorited_activity}
90 def handle_favorite(entry, doc) do
91 with {:ok, favorited_activity} <- get_or_try_fetching(entry),
92 {:ok, activity} <- make_favorite(entry, doc, favorited_activity) do
93 {:ok, activity, favorited_activity}
99 def get_attachments(entry) do
100 :xmerl_xpath.string('/entry/link[@rel="enclosure"]', entry)
101 |> Enum.map(fn (enclosure) ->
102 with href when not is_nil(href) <- string_from_xpath("/link/@href", enclosure),
103 type when not is_nil(type) <- string_from_xpath("/link/@type", enclosure) do
105 "type" => "Attachment",
114 |> Enum.filter(&(&1))
117 def handle_note(entry, doc \\ nil) do
118 content_html = string_from_xpath("//content[1]", entry)
120 [author] = :xmerl_xpath.string('//author[1]', doc)
121 {:ok, actor} = find_make_or_update_user(author)
122 inReplyTo = string_from_xpath("//thr:in-reply-to[1]/@ref", entry)
124 context = (string_from_xpath("//ostatus:conversation[1]", entry) || "") |> String.trim
126 attachments = get_attachments(entry)
128 context = with %{data: %{"context" => context}} <- Object.get_cached_by_ap_id(inReplyTo) do
131 if String.length(context) > 0 do
134 ActivityPub.generate_context_id
139 "https://www.w3.org/ns/activitystreams#Public"
142 mentions = :xmerl_xpath.string('//link[@rel="mentioned" and @ostatus:object-type="http://activitystrea.ms/schema/1.0/person"]', entry)
143 |> Enum.map(fn(person) -> string_from_xpath("@href", person) end)
147 date = string_from_xpath("//published", entry)
148 id = string_from_xpath("//id", entry)
154 "content" => content_html,
156 "context" => context,
157 "actor" => actor.ap_id,
158 "attachment" => attachments
161 object = if inReplyTo do
162 Map.put(object, "inReplyTo", inReplyTo)
167 # TODO: Bail out sooner and use transaction.
168 if Object.get_by_ap_id(id) do
169 {:error, "duplicate activity"}
171 ActivityPub.create(to, actor, context, object, %{}, date, false)
175 def find_make_or_update_user(doc) do
176 uri = string_from_xpath("//author/uri[1]", doc)
177 with {:ok, user} <- find_or_make_user(uri) do
178 avatar = make_avatar_object(doc)
179 if user.avatar != avatar do
180 change = Ecto.Changeset.change(user, %{avatar: avatar})
188 def find_or_make_user(uri) do
189 query = from user in User,
190 where: user.local == false and fragment("? @> ?", user.info, ^%{uri: uri})
192 user = Repo.one(query)
201 def make_user(uri) do
202 with {:ok, info} <- gather_user_info(uri) do
206 nickname: info["nickname"] <> "@" <> info["host"],
209 avatar: info["avatar"]
211 # TODO: Make remote user changeset
212 # SHould enforce fqn nickname
213 Repo.insert(Ecto.Changeset.change(%User{}, data))
217 # TODO: Just takes the first one for now.
218 def make_avatar_object(author_doc) do
219 href = string_from_xpath("//author[1]/link[@rel=\"avatar\"]/@href", author_doc)
220 type = string_from_xpath("//author[1]/link[@rel=\"avatar\"]/@type", author_doc)
237 def gather_user_info(username) do
238 with {:ok, webfinger_data} <- WebFinger.finger(username),
239 {:ok, feed_data} <- Websub.gather_feed_data(webfinger_data["topic"]) do
240 {:ok, Map.merge(webfinger_data, feed_data) |> Map.put("fqn", username)}
242 Logger.debug(fn -> "Couldn't gather info for #{username}" end)
247 # Regex-based 'parsing' so we don't have to pull in a full html parser
248 # It's a hack anyway. Maybe revisit this in the future
249 @mastodon_regex ~r/<link href='(.*)' rel='alternate' type='application\/atom\+xml'>/
250 @gs_regex ~r/<link title=.* href="(.*)" type="application\/atom\+xml" rel="alternate">/
251 def get_atom_url(body) do
253 Regex.match?(@mastodon_regex, body) ->
254 [[_, match]] = Regex.scan(@mastodon_regex, body)
256 Regex.match?(@gs_regex, body) ->
257 [[_, match]] = Regex.scan(@gs_regex, body)
260 Logger.debug(fn -> "Couldn't find atom link in #{inspect(body)}" end)
261 {:error, "Couldn't find the atom link"}
265 def fetch_activity_from_html_url(url) do
266 with {:ok, %{body: body}} <- @httpoison.get(url),
267 {:ok, atom_url} <- get_atom_url(body),
268 {:ok, %{status_code: code, body: body}} when code in 200..299 <- @httpoison.get(atom_url) do
269 handle_incoming(body)