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
52 priority = case activity.data["type"] do
57 Pleroma.Web.Federator.enqueue(:publish, activity, priority)
60 def maybe_federate(_), do: :ok
63 Adds an id and a published data if they aren't there,
64 also adds it to an included object
66 def lazy_put_activity_defaults(map) do
68 |> Map.put_new_lazy("id", &generate_activity_id/0)
69 |> Map.put_new_lazy("published", &make_date/0)
71 if is_map(map["object"]) do
72 object = lazy_put_object_defaults(map["object"])
73 %{map | "object" => object}
80 Adds an id and published date if they aren't there.
82 def lazy_put_object_defaults(map) do
84 |> Map.put_new_lazy("id", &generate_object_id/0)
85 |> Map.put_new_lazy("published", &make_date/0)
89 Inserts a full object if it is contained in an activity.
91 def insert_full_object(%{"object" => %{"type" => type} = object_data}) when is_map(object_data) and type in ["Note"] do
92 with {:ok, _} <- Object.create(object_data) do
96 def insert_full_object(_), do: :ok
98 def update_object_in_activities(%{data: %{"id" => id}} = object) do
100 # Update activities that already had this. Could be done in a seperate process.
101 # Alternatively, just don't do this and fetch the current object each time. Most
102 # could probably be taken from cache.
103 relevant_activities = Activity.all_by_object_ap_id(id)
104 Enum.map(relevant_activities, fn (activity) ->
105 new_activity_data = activity.data |> Map.put("object", object.data)
106 changeset = Changeset.change(activity, data: new_activity_data)
107 Repo.update(changeset)
111 #### Like-related helpers
114 Returns an existing like if a user already liked an object
116 def get_existing_like(actor, %{data: %{"id" => id}}) do
117 query = from activity in Activity,
118 where: fragment("(?)->>'actor' = ?", activity.data, ^actor),
119 # this is to use the index
120 where: fragment("coalesce((?)->'object'->>'id', (?)->>'object') = ?", activity.data, activity.data, ^id),
121 where: fragment("(?)->>'type' = 'Like'", activity.data)
126 def make_like_data(%User{ap_id: ap_id} = actor, %{data: %{"id" => id}} = object, activity_id) do
131 "to" => [actor.follower_address, object.data["actor"]],
132 "cc" => ["https://www.w3.org/ns/activitystreams#Public"],
133 "context" => object.data["context"]
136 if activity_id, do: Map.put(data, "id", activity_id), else: data
139 def update_element_in_object(property, element, object) do
140 with new_data <- object.data |> Map.put("#{property}_count", length(element)) |> Map.put("#{property}s", element),
141 changeset <- Changeset.change(object, data: new_data),
142 {:ok, object} <- Repo.update(changeset),
143 _ <- update_object_in_activities(object) do
148 def update_likes_in_object(likes, object) do
149 update_element_in_object("like", likes, object)
152 def add_like_to_object(%Activity{data: %{"actor" => actor}}, object) do
153 with likes <- [actor | (object.data["likes"] || [])] |> Enum.uniq do
154 update_likes_in_object(likes, object)
158 def remove_like_from_object(%Activity{data: %{"actor" => actor}}, object) do
159 with likes <- (object.data["likes"] || []) |> List.delete(actor) do
160 update_likes_in_object(likes, object)
164 #### Follow-related helpers
167 Makes a follow activity data for the given follower and followed
169 def make_follow_data(%User{ap_id: follower_id}, %User{ap_id: followed_id}, activity_id) do
172 "actor" => follower_id,
173 "to" => [followed_id],
174 "cc" => ["https://www.w3.org/ns/activitystreams#Public"],
175 "object" => followed_id
178 if activity_id, do: Map.put(data, "id", activity_id), else: data
181 def fetch_latest_follow(%User{ap_id: follower_id},
182 %User{ap_id: followed_id}) do
183 query = from activity in Activity,
184 where: fragment("? @> ?", activity.data, ^%{type: "Follow", actor: follower_id,
185 object: followed_id}),
186 order_by: [desc: :id],
191 #### Announce-related helpers
194 Make announce activity data for the given actor and object
196 def make_announce_data(%User{ap_id: ap_id} = user, %Object{data: %{"id" => id}} = object, activity_id) do
198 "type" => "Announce",
201 "to" => [user.follower_address, object.data["actor"]],
202 "cc" => ["https://www.w3.org/ns/activitystreams#Public"],
203 "context" => object.data["context"]
206 if activity_id, do: Map.put(data, "id", activity_id), else: data
209 def add_announce_to_object(%Activity{data: %{"actor" => actor}}, object) do
210 with announcements <- [actor | (object.data["announcements"] || [])] |> Enum.uniq do
211 update_element_in_object("announcement", announcements, object)
215 #### Unfollow-related helpers
217 def make_unfollow_data(follower, followed, follow_activity) do
220 "actor" => follower.ap_id,
221 "to" => [followed.ap_id],
222 "object" => follow_activity.data["id"]
227 #### Create-related helpers
229 def make_create_data(params, additional) do
230 published = params.published || make_date()
233 "to" => params.to |> Enum.uniq,
234 "actor" => params.actor.ap_id,
235 "object" => params.object,
236 "published" => published,
237 "context" => params.context
239 |> Map.merge(additional)