akkoma/lib/pleroma/activity/search.ex
2019-06-05 16:37:43 +07:00

76 lines
2.1 KiB
Elixir

# Pleroma: A lightweight social networking server
# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Activity.Search do
alias Pleroma.Activity
alias Pleroma.Object.Fetcher
alias Pleroma.Repo
alias Pleroma.User
alias Pleroma.Web.ActivityPub.Visibility
import Ecto.Query
def search(user, search_query) do
index_type = if Pleroma.Config.get([:database, :rum_enabled]), do: :rum, else: :gin
Activity
|> Activity.with_preloaded_object()
|> Activity.restrict_deactivated_users()
|> restrict_public()
|> query_with(index_type, search_query)
|> maybe_restrict_local(user)
|> Repo.all()
|> maybe_fetch(user, search_query)
end
defp restrict_public(q) do
from([a, o] in q,
where: fragment("?->>'type' = 'Create'", a.data),
where: "https://www.w3.org/ns/activitystreams#Public" in a.recipients,
limit: 40
)
end
defp query_with(q, :gin, search_query) do
from([a, o] in q,
where:
fragment(
"to_tsvector('english', ?->>'content') @@ plainto_tsquery('english', ?)",
o.data,
^search_query
),
order_by: [desc: :id]
)
end
defp query_with(q, :rum, search_query) do
from([a, o] in q,
where:
fragment(
"? @@ plainto_tsquery('english', ?)",
o.fts_content,
^search_query
),
order_by: [fragment("? <=> now()::date", o.inserted_at)]
)
end
# users can search everything
defp maybe_restrict_local(q, %User{}), do: q
# unauthenticated users can only search local activities
defp maybe_restrict_local(q, _), do: where(q, local: true)
defp maybe_fetch(activities, user, search_query) do
with true <- Regex.match?(~r/https?:/, search_query),
{:ok, object} <- Fetcher.fetch_object_from_id(search_query),
%Activity{} = activity <- Activity.get_create_by_object_ap_id(object.data["id"]),
true <- Visibility.visible_for_user?(activity, user) do
activities ++ [activity]
else
_ -> activities
end
end
end