commit: f047088a937ddf95d5fd7f84ad69fd97decbffc0 parent 4e7ed563c050e3781990e6c62ea5996d61b63d37 Author: Tusooa Zhu <tusooa@kazv.moe> Date: Sat, 20 Aug 2022 21:06:12 -0400 Update thread visibility functionDiffstat:
| A | priv/repo/migrations/20220821004840_change_thread_visibility_to_use_new_object_id_index.exs | 156 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
1 file changed, 156 insertions(+), 0 deletions(-)diff --git a/priv/repo/migrations/20220821004840_change_thread_visibility_to_use_new_object_id_index.exs b/priv/repo/migrations/20220821004840_change_thread_visibility_to_use_new_object_id_index.exs@@ -0,0 +1,156 @@ +# Pleroma: A lightweight social networking server +# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/> +# SPDX-License-Identifier: AGPL-3.0-only + +defmodule Pleroma.Repo.Migrations.ChangeThreadVisibilityToUseNewObjectIdIndex do + use Ecto.Migration + + def up do + execute(update_thread_visibility()) + end + + def down do + execute(restore_thread_visibility()) + end + + def update_thread_visibility do + """ + CREATE OR REPLACE FUNCTION thread_visibility(actor varchar, activity_id varchar, local_public varchar default '') RETURNS boolean AS $$ + DECLARE + public varchar := 'https://www.w3.org/ns/activitystreams#Public'; + child objects%ROWTYPE; + activity activities%ROWTYPE; + author_fa varchar; + valid_recipients varchar[]; + actor_user_following varchar[]; + BEGIN + --- Fetch actor following + SELECT array_agg(following.follower_address) INTO actor_user_following FROM following_relationships + JOIN users ON users.id = following_relationships.follower_id + JOIN users AS following ON following.id = following_relationships.following_id + WHERE users.ap_id = actor; + + --- Fetch our initial activity. + SELECT * INTO activity FROM activities WHERE activities.data->>'id' = activity_id; + + LOOP + --- Ensure that we have an activity before continuing. + --- If we don't, the thread is not satisfiable. + IF activity IS NULL THEN + RETURN false; + END IF; + + --- We only care about Create activities. + IF activity.data->>'type' != 'Create' THEN + RETURN true; + END IF; + + --- Normalize the child object into child. + SELECT * INTO child FROM objects + INNER JOIN activities ON associated_object_id(activities.data) = objects.data->>'id' + WHERE associated_object_id(activity.data) = objects.data->>'id'; + + --- Fetch the author's AS2 following collection. + SELECT COALESCE(users.follower_address, '') INTO author_fa FROM users WHERE users.ap_id = activity.actor; + + --- Prepare valid recipients array. + valid_recipients := ARRAY[actor, public]; + --- If we specified local public, add it. + IF local_public <> '' THEN + valid_recipients := valid_recipients || local_public; + END IF; + IF ARRAY[author_fa] && actor_user_following THEN + valid_recipients := valid_recipients || author_fa; + END IF; + + --- Check visibility. + IF NOT valid_recipients && activity.recipients THEN + --- activity not visible, break out of the loop + RETURN false; + END IF; + + --- If there's a parent, load it and do this all over again. + IF (child.data->'inReplyTo' IS NOT NULL) AND (child.data->'inReplyTo' != 'null'::jsonb) THEN + SELECT * INTO activity FROM activities + INNER JOIN objects ON associated_object_id(activities.data) = objects.data->>'id' + WHERE child.data->>'inReplyTo' = objects.data->>'id'; + ELSE + RETURN true; + END IF; + END LOOP; + END; + $$ LANGUAGE plpgsql IMMUTABLE; + """ + end + + # priv/repo/migrations/20220509180452_change_thread_visibility_to_be_local_only_aware.exs + def restore_thread_visibility do + """ + CREATE OR REPLACE FUNCTION thread_visibility(actor varchar, activity_id varchar, local_public varchar default '') RETURNS boolean AS $$ + DECLARE + public varchar := 'https://www.w3.org/ns/activitystreams#Public'; + child objects%ROWTYPE; + activity activities%ROWTYPE; + author_fa varchar; + valid_recipients varchar[]; + actor_user_following varchar[]; + BEGIN + --- Fetch actor following + SELECT array_agg(following.follower_address) INTO actor_user_following FROM following_relationships + JOIN users ON users.id = following_relationships.follower_id + JOIN users AS following ON following.id = following_relationships.following_id + WHERE users.ap_id = actor; + + --- Fetch our initial activity. + SELECT * INTO activity FROM activities WHERE activities.data->>'id' = activity_id; + + LOOP + --- Ensure that we have an activity before continuing. + --- If we don't, the thread is not satisfiable. + IF activity IS NULL THEN + RETURN false; + END IF; + + --- We only care about Create activities. + IF activity.data->>'type' != 'Create' THEN + RETURN true; + END IF; + + --- Normalize the child object into child. + SELECT * INTO child FROM objects + INNER JOIN activities ON COALESCE(activities.data->'object'->>'id', activities.data->>'object') = objects.data->>'id' + WHERE COALESCE(activity.data->'object'->>'id', activity.data->>'object') = objects.data->>'id'; + + --- Fetch the author's AS2 following collection. + SELECT COALESCE(users.follower_address, '') INTO author_fa FROM users WHERE users.ap_id = activity.actor; + + --- Prepare valid recipients array. + valid_recipients := ARRAY[actor, public]; + --- If we specified local public, add it. + IF local_public <> '' THEN + valid_recipients := valid_recipients || local_public; + END IF; + IF ARRAY[author_fa] && actor_user_following THEN + valid_recipients := valid_recipients || author_fa; + END IF; + + --- Check visibility. + IF NOT valid_recipients && activity.recipients THEN + --- activity not visible, break out of the loop + RETURN false; + END IF; + + --- If there's a parent, load it and do this all over again. + IF (child.data->'inReplyTo' IS NOT NULL) AND (child.data->'inReplyTo' != 'null'::jsonb) THEN + SELECT * INTO activity FROM activities + INNER JOIN objects ON COALESCE(activities.data->'object'->>'id', activities.data->>'object') = objects.data->>'id' + WHERE child.data->>'inReplyTo' = objects.data->>'id'; + ELSE + RETURN true; + END IF; + END LOOP; + END; + $$ LANGUAGE plpgsql IMMUTABLE; + """ + end +end