1 defmodule Pleroma.Web.ActivityPub.Utils do
2 alias Pleroma.{Repo, Web, Object, Activity, User}
3 alias Pleroma.Web.Router.Helpers
4 alias Pleroma.Web.Endpoint
5 alias Ecto.{Changeset, UUID}
8 def make_json_ld_header do
11 "https://www.w3.org/ns/activitystreams",
12 "https://w3id.org/security/v1",
14 "manuallyApprovesFollowers" => "as:manuallyApprovesFollowers",
15 "sensitive" => "as:sensitive",
16 "Hashtag" => "as:Hashtag",
17 "ostatus" => "http://ostatus.org#",
18 "atomUri" => "ostatus:atomUri",
19 "inReplyToAtomUri" => "ostatus:inReplyToAtomUri",
20 "conversation" => "ostatus:conversation",
21 "toot" => "http://joinmastodon.org/ns#",
22 "Emoji" => "toot:Emoji"
29 DateTime.utc_now() |> DateTime.to_iso8601()
32 def generate_activity_id do
33 generate_id("activities")
36 def generate_context_id do
37 generate_id("contexts")
40 def generate_object_id do
41 Helpers.o_status_url(Endpoint, :object, UUID.generate())
44 def generate_id(type) do
45 "#{Web.base_url()}/#{type}/#{UUID.generate()}"
49 Enqueues an activity for federation if it's local
51 def maybe_federate(%Activity{local: true} = activity) do
53 case activity.data["type"] do
59 Pleroma.Web.Federator.enqueue(:publish, activity, priority)
63 def maybe_federate(_), do: :ok
66 Adds an id and a published data if they aren't there,
67 also adds it to an included object
69 def lazy_put_activity_defaults(map) do
72 |> Map.put_new_lazy("id", &generate_activity_id/0)
73 |> Map.put_new_lazy("published", &make_date/0)
75 if is_map(map["object"]) do
76 object = lazy_put_object_defaults(map["object"])
77 %{map | "object" => object}
84 Adds an id and published date if they aren't there.
86 def lazy_put_object_defaults(map) do
88 |> Map.put_new_lazy("id", &generate_object_id/0)
89 |> Map.put_new_lazy("published", &make_date/0)
93 Inserts a full object if it is contained in an activity.
95 def insert_full_object(%{"object" => %{"type" => type} = object_data})
96 when is_map(object_data) and type in ["Note"] do
97 with {:ok, _} <- Object.create(object_data) do
102 def insert_full_object(_), do: :ok
104 def update_object_in_activities(%{data: %{"id" => id}} = object) do
106 # Update activities that already had this. Could be done in a seperate process.
107 # Alternatively, just don't do this and fetch the current object each time. Most
108 # could probably be taken from cache.
109 relevant_activities = Activity.all_by_object_ap_id(id)
111 Enum.map(relevant_activities, fn activity ->
112 new_activity_data = activity.data |> Map.put("object", object.data)
113 changeset = Changeset.change(activity, data: new_activity_data)
114 Repo.update(changeset)
118 #### Like-related helpers
121 Returns an existing like if a user already liked an object
123 def get_existing_like(actor, %{data: %{"id" => id}}) do
126 activity in Activity,
127 where: fragment("(?)->>'actor' = ?", activity.data, ^actor),
128 # this is to use the index
131 "coalesce((?)->'object'->>'id', (?)->>'object') = ?",
136 where: fragment("(?)->>'type' = 'Like'", activity.data)
142 def make_like_data(%User{ap_id: ap_id} = actor, %{data: %{"id" => id}} = object, activity_id) do
147 "to" => [actor.follower_address, object.data["actor"]],
148 "cc" => ["https://www.w3.org/ns/activitystreams#Public"],
149 "context" => object.data["context"]
152 if activity_id, do: Map.put(data, "id", activity_id), else: data
155 def update_element_in_object(property, element, object) do
157 object.data |> Map.put("#{property}_count", length(element))
158 |> Map.put("#{property}s", element),
159 changeset <- Changeset.change(object, data: new_data),
160 {:ok, object} <- Repo.update(changeset),
161 _ <- update_object_in_activities(object) do
166 def update_likes_in_object(likes, object) do
167 update_element_in_object("like", likes, object)
170 def add_like_to_object(%Activity{data: %{"actor" => actor}}, object) do
171 with likes <- [actor | object.data["likes"] || []] |> Enum.uniq() do
172 update_likes_in_object(likes, object)
176 def remove_like_from_object(%Activity{data: %{"actor" => actor}}, object) do
177 with likes <- (object.data["likes"] || []) |> List.delete(actor) do
178 update_likes_in_object(likes, object)
182 #### Follow-related helpers
185 Makes a follow activity data for the given follower and followed
187 def make_follow_data(%User{ap_id: follower_id}, %User{ap_id: followed_id}, activity_id) do
190 "actor" => follower_id,
191 "to" => [followed_id],
192 "cc" => ["https://www.w3.org/ns/activitystreams#Public"],
193 "object" => followed_id
196 if activity_id, do: Map.put(data, "id", activity_id), else: data
199 def fetch_latest_follow(%User{ap_id: follower_id}, %User{ap_id: followed_id}) do
202 activity in Activity,
207 ^%{type: "Follow", actor: follower_id, object: followed_id}
209 order_by: [desc: :id],
216 #### Announce-related helpers
219 Make announce activity data for the given actor and object
221 def make_announce_data(
222 %User{ap_id: ap_id} = user,
223 %Object{data: %{"id" => id}} = object,
227 "type" => "Announce",
230 "to" => [user.follower_address, object.data["actor"]],
231 "cc" => ["https://www.w3.org/ns/activitystreams#Public"],
232 "context" => object.data["context"]
235 if activity_id, do: Map.put(data, "id", activity_id), else: data
238 def add_announce_to_object(%Activity{data: %{"actor" => actor}}, object) do
239 with announcements <- [actor | object.data["announcements"] || []] |> Enum.uniq() do
240 update_element_in_object("announcement", announcements, object)
244 #### Unfollow-related helpers
246 def make_unfollow_data(follower, followed, follow_activity) do
249 "actor" => follower.ap_id,
250 "to" => [followed.ap_id],
251 "object" => follow_activity.data["id"]
255 #### Create-related helpers
257 def make_create_data(params, additional) do
258 published = params.published || make_date()
262 "to" => params.to |> Enum.uniq(),
263 "actor" => params.actor.ap_id,
264 "object" => params.object,
265 "published" => published,
266 "context" => params.context
268 |> Map.merge(additional)