1 defmodule Pleroma.Repo.Migrations.AddThreadVisibilityFunction do
3 @disable_ddl_transaction true
7 CREATE OR REPLACE FUNCTION thread_visibility(actor varchar, activity_id varchar) RETURNS boolean AS $$
9 public varchar := 'https://www.w3.org/ns/activitystreams#Public';
10 child objects%ROWTYPE;
11 activity activities%ROWTYPE;
12 actor_user users%ROWTYPE;
17 SELECT * INTO actor_user FROM users WHERE users.ap_id = actor;
19 --- Fetch our initial activity.
20 SELECT * INTO activity FROM activities WHERE activities.data->>'id' = activity_id;
23 --- Ensure that we have an activity before continuing.
24 IF activity IS NULL THEN
28 --- We only care about Create activities.
29 IF activity.data->>'type' != 'Create' THEN
33 --- Normalize the child object into child.
34 SELECT * INTO child FROM objects
35 INNER JOIN activities ON COALESCE(activities.data->'object'->>'id', activities.data->>'object') = objects.data->>'id'
36 WHERE COALESCE(activity.data->'object'->>'id', activity.data->>'object') = objects.data->>'id';
39 SELECT * INTO author FROM users WHERE users.ap_id = activity.actor;
41 --- Prepare author's AS2 followers collection.
42 SELECT COALESCE(author.follower_address, '') INTO author_fa;
45 IF activity.actor = actor THEN
48 ELSIF ARRAY[public] && activity.recipients THEN
51 ELSIF ARRAY[author_fa] && activity.recipients AND ARRAY[author_fa] && actor_user.following THEN
54 ELSIF ARRAY[actor] && activity.recipients THEN
58 --- activity not visible, break out of the loop
62 --- If there's a parent, load it and do this all over again.
63 IF (child.data->'inReplyTo' IS NOT NULL) AND (child.data->'inReplyTo' != 'null'::jsonb) THEN
64 SELECT * INTO activity FROM activities
65 INNER JOIN objects ON COALESCE(activities.data->'object'->>'id', activities.data->>'object') = objects.data->>'id'
66 WHERE child.data->>'inReplyTo' = objects.data->>'id';
72 $$ LANGUAGE plpgsql IMMUTABLE;
79 execute("drop function thread_visibility(actor varchar, activity_id varchar)")