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}
9 DateTime.utc_now() |> DateTime.to_iso8601
12 def generate_activity_id do
13 generate_id("activities")
16 def generate_context_id do
17 generate_id("contexts")
20 def generate_object_id do
21 Helpers.o_status_url(Endpoint, :object, UUID.generate)
24 def generate_id(type) do
25 "#{Web.base_url()}/#{type}/#{UUID.generate}"
29 Enqueues an activity for federation if it's local
31 def maybe_federate(%Activity{local: true} = activity) do
32 priority = case activity.data["type"] do
37 Pleroma.Web.Federator.enqueue(:publish, activity, priority)
40 def maybe_federate(_), do: :ok
43 Adds an id and a published data if they aren't there,
44 also adds it to an included object
46 def lazy_put_activity_defaults(map) do
48 |> Map.put_new_lazy("id", &generate_activity_id/0)
49 |> Map.put_new_lazy("published", &make_date/0)
51 if is_map(map["object"]) do
52 object = lazy_put_object_defaults(map["object"])
53 %{map | "object" => object}
60 Adds an id and published date if they aren't there.
62 def lazy_put_object_defaults(map) do
64 |> Map.put_new_lazy("id", &generate_object_id/0)
65 |> Map.put_new_lazy("published", &make_date/0)
69 Inserts a full object if it is contained in an activity.
71 def insert_full_object(%{"object" => object_data}) when is_map(object_data) do
72 with {:ok, _} <- Object.create(object_data) do
76 def insert_full_object(_), do: :ok
78 def update_object_in_activities(%{data: %{"id" => id}} = object) do
80 # Update activities that already had this. Could be done in a seperate process.
81 # Alternatively, just don't do this and fetch the current object each time. Most
82 # could probably be taken from cache.
83 relevant_activities = Activity.all_by_object_ap_id(id)
84 Enum.map(relevant_activities, fn (activity) ->
85 new_activity_data = activity.data |> Map.put("object", object.data)
86 changeset = Changeset.change(activity, data: new_activity_data)
87 Repo.update(changeset)
91 #### Like-related helpers
94 Returns an existing like if a user already liked an object
96 def get_existing_like(actor, %{data: %{"id" => id}}) do
97 query = from activity in Activity,
98 where: fragment("(?)->>'actor' = ?", activity.data, ^actor),
99 # this is to use the index
100 where: fragment("coalesce((?)->'object'->>'id', (?)->>'object') = ?", activity.data, activity.data, ^id),
101 where: fragment("(?)->>'type' = 'Like'", activity.data)
106 def make_like_data(%User{ap_id: ap_id} = actor, %{data: %{"id" => id}} = object, activity_id) do
111 "to" => [actor.follower_address, object.data["actor"]],
112 "context" => object.data["context"]
115 if activity_id, do: Map.put(data, "id", activity_id), else: data
118 def update_element_in_object(property, element, object) do
119 with new_data <- object.data |> Map.put("#{property}_count", length(element)) |> Map.put("#{property}s", element),
120 changeset <- Changeset.change(object, data: new_data),
121 {:ok, object} <- Repo.update(changeset),
122 _ <- update_object_in_activities(object) do
127 def update_likes_in_object(likes, object) do
128 update_element_in_object("like", likes, object)
131 def add_like_to_object(%Activity{data: %{"actor" => actor}}, object) do
132 with likes <- [actor | (object.data["likes"] || [])] |> Enum.uniq do
133 update_likes_in_object(likes, object)
137 def remove_like_from_object(%Activity{data: %{"actor" => actor}}, object) do
138 with likes <- (object.data["likes"] || []) |> List.delete(actor) do
139 update_likes_in_object(likes, object)
143 #### Follow-related helpers
146 Makes a follow activity data for the given follower and followed
148 def make_follow_data(%User{ap_id: follower_id}, %User{ap_id: followed_id}, activity_id) do
151 "actor" => follower_id,
152 "to" => [followed_id],
153 "object" => followed_id
156 if activity_id, do: Map.put(data, "id", activity_id), else: data
159 def fetch_latest_follow(%User{ap_id: follower_id},
160 %User{ap_id: followed_id}) do
161 query = from activity in Activity,
162 where: fragment("? @> ?", activity.data, ^%{type: "Follow", actor: follower_id,
163 object: followed_id}),
164 order_by: [desc: :id],
169 #### Announce-related helpers
172 Make announce activity data for the given actor and object
174 def make_announce_data(%User{ap_id: ap_id} = user, %Object{data: %{"id" => id}} = object, activity_id) do
176 "type" => "Announce",
179 "to" => [user.follower_address, object.data["actor"]],
180 "context" => object.data["context"]
183 if activity_id, do: Map.put(data, "id", activity_id), else: data
186 def add_announce_to_object(%Activity{data: %{"actor" => actor}}, object) do
187 with announcements <- [actor | (object.data["announcements"] || [])] |> Enum.uniq do
188 update_element_in_object("announcement", announcements, object)
192 #### Unfollow-related helpers
194 def make_unfollow_data(follower, followed, follow_activity) do
197 "actor" => follower.ap_id,
198 "to" => [followed.ap_id],
199 "object" => follow_activity.data["id"]
204 #### Create-related helpers
206 def make_create_data(params, additional) do
207 published = params.published || make_date()
211 "to" => params.to |> Enum.uniq,
212 "actor" => params.actor.ap_id,
213 "object" => params.object,
214 "published" => published,
215 "context" => params.context
217 |> Map.merge(additional)