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 Pleroma.Web.Federator.enqueue(:publish, activity)
35 def maybe_federate(_), do: :ok
38 Adds an id and a published data if they aren't there,
39 also adds it to an included object
41 def lazy_put_activity_defaults(map) do
43 |> Map.put_new_lazy("id", &generate_activity_id/0)
44 |> Map.put_new_lazy("published", &make_date/0)
46 if is_map(map["object"]) do
47 object = lazy_put_object_defaults(map["object"])
48 %{map | "object" => object}
55 Adds an id and published date if they aren't there.
57 def lazy_put_object_defaults(map) do
59 |> Map.put_new_lazy("id", &generate_object_id/0)
60 |> Map.put_new_lazy("published", &make_date/0)
64 Inserts a full object if it is contained in an activity.
66 def insert_full_object(%{"object" => object_data}) when is_map(object_data) do
67 with {:ok, object} <- Object.create(object_data) do
71 def insert_full_object(_), do: :ok
73 def update_object_in_activities(%{data: %{"id" => id}} = object) do
75 # Update activities that already had this. Could be done in a seperate process.
76 # Alternatively, just don't do this and fetch the current object each time. Most
77 # could probably be taken from cache.
78 relevant_activities = Activity.all_by_object_ap_id(id)
79 Enum.map(relevant_activities, fn (activity) ->
80 new_activity_data = activity.data |> Map.put("object", object.data)
81 changeset = Changeset.change(activity, data: new_activity_data)
82 Repo.update(changeset)
86 #### Like-related helpers
89 Returns an existing like if a user already liked an object
91 def get_existing_like(actor, %{data: %{"id" => id}} = object) do
92 query = from activity in Activity,
93 where: fragment("(?)->>'actor' = ?", activity.data, ^actor),
94 # this is to use the index
95 where: fragment("coalesce((?)->'object'->>'id', (?)->>'object') = ?", activity.data, activity.data, ^id),
96 where: fragment("(?)->>'type' = 'Like'", activity.data)
101 def make_like_data(%User{ap_id: ap_id} = actor, %{data: %{"id" => id}} = object, activity_id) do
106 "to" => [actor.follower_address, object.data["actor"]],
107 "context" => object.data["context"]
110 if activity_id, do: Map.put(data, "id", activity_id), else: data
113 def update_element_in_object(property, element, object) do
114 with new_data <- object.data |> Map.put("#{property}_count", length(element)) |> Map.put("#{property}s", element),
115 changeset <- Changeset.change(object, data: new_data),
116 {:ok, object} <- Repo.update(changeset),
117 _ <- update_object_in_activities(object) do
122 def update_likes_in_object(likes, object) do
123 update_element_in_object("like", likes, object)
126 def add_like_to_object(%Activity{data: %{"actor" => actor}}, object) do
127 with likes <- [actor | (object.data["likes"] || [])] |> Enum.uniq do
128 update_likes_in_object(likes, object)
132 def remove_like_from_object(%Activity{data: %{"actor" => actor}}, object) do
133 with likes <- (object.data["likes"] || []) |> List.delete(actor) do
134 update_likes_in_object(likes, object)
138 #### Follow-related helpers
141 Makes a follow activity data for the given follower and followed
143 def make_follow_data(%User{ap_id: follower_id}, %User{ap_id: followed_id}, activity_id) do
146 "actor" => follower_id,
147 "to" => [followed_id],
148 "object" => followed_id
151 if activity_id, do: Map.put(data, "id", activity_id), else: data
154 def fetch_latest_follow(%User{ap_id: follower_id},
155 %User{ap_id: followed_id}) do
156 query = from activity in Activity,
157 where: fragment("? @> ?", activity.data, ^%{type: "Follow", actor: follower_id,
158 object: followed_id}),
159 order_by: [desc: :id],
164 #### Announce-related helpers
167 Make announce activity data for the given actor and object
169 def make_announce_data(%User{ap_id: ap_id} = user, %Object{data: %{"id" => id}} = object, activity_id) do
171 "type" => "Announce",
174 "to" => [user.follower_address, object.data["actor"]],
175 "context" => object.data["context"]
178 if activity_id, do: Map.put(data, "id", activity_id), else: data
181 def add_announce_to_object(%Activity{data: %{"actor" => actor}}, object) do
182 with announcements <- [actor | (object.data["announcements"] || [])] |> Enum.uniq do
183 update_element_in_object("announcement", announcements, object)
187 #### Unfollow-related helpers
189 def make_unfollow_data(follower, followed, follow_activity) do
192 "actor" => follower.ap_id,
193 "to" => [followed.ap_id],
194 "object" => follow_activity.data["id"]
199 #### Create-related helpers
201 def make_create_data(params, additional) do
202 published = params.published || make_date()
206 "to" => params.to |> Enum.uniq,
207 "actor" => params.actor.ap_id,
208 "object" => params.object,
209 "published" => published,
210 "context" => params.context
212 |> Map.merge(additional)