# Pleroma: A lightweight social networking server # Copyright © 2017-2023 Pleroma Authors # SPDX-License-Identifier: AGPL-3.0-only defmodule Pleroma.Activity.Search do alias Pleroma.Activity alias Pleroma.Object.Fetcher alias Pleroma.Pagination alias Pleroma.User alias Pleroma.Web.ActivityPub.Visibility require Pleroma.Constants import Ecto.Query def search(user, search_query, options \\ []) do index_type = if Pleroma.Config.get([:database, :rum_enabled]), do: :rum, else: :gin limit = Enum.min([Keyword.get(options, :limit), 40]) offset = Keyword.get(options, :offset, 0) author = Keyword.get(options, :author) search_function = if :persistent_term.get({Pleroma.Repo, :postgres_version}) >= 11 do :websearch else :plain end try do Activity |> Activity.with_preloaded_object() |> Activity.restrict_deactivated_users() |> restrict_public(user) |> query_with(index_type, search_query, search_function) |> maybe_restrict_local(user) |> maybe_restrict_author(author) |> maybe_restrict_blocked(user) |> Pagination.fetch_paginated( %{"offset" => offset, "limit" => limit, "skip_order" => index_type == :rum}, :offset ) |> maybe_fetch(user, search_query) rescue _ -> maybe_fetch([], user, search_query) end end def maybe_restrict_author(query, %User{} = author) do Activity.Queries.by_author(query, author) end def maybe_restrict_author(query, _), do: query def maybe_restrict_blocked(query, %User{} = user) do Activity.Queries.exclude_authors(query, User.blocked_users_ap_ids(user)) end def maybe_restrict_blocked(query, _), do: query defp restrict_public(q, user) when not is_nil(user) do intended_recipients = [ Pleroma.Constants.as_public(), Pleroma.Web.ActivityPub.Utils.as_local_public() ] from([a, o] in q, where: fragment("?->>'type' = 'Create'", a.data), where: fragment("? && ?", ^intended_recipients, a.recipients) ) end defp restrict_public(q, _user) do from([a, o] in q, where: fragment("?->>'type' = 'Create'", a.data), where: ^Pleroma.Constants.as_public() in a.recipients ) end defp query_with(q, :gin, search_query, :plain) do %{rows: [[tsc]]} = Ecto.Adapters.SQL.query!( Pleroma.Repo, "select current_setting('default_text_search_config')::regconfig::oid;" ) from([a, o] in q, where: fragment( "to_tsvector(?::oid::regconfig, ?->>'content') @@ plainto_tsquery(?)", ^tsc, o.data, ^search_query ) ) end defp query_with(q, :gin, search_query, :websearch) do %{rows: [[tsc]]} = Ecto.Adapters.SQL.query!( Pleroma.Repo, "select current_setting('default_text_search_config')::regconfig::oid;" ) from([a, o] in q, where: fragment( "to_tsvector(?::oid::regconfig, ?->>'content') @@ websearch_to_tsquery(?)", ^tsc, o.data, ^search_query ) ) end defp query_with(q, :rum, search_query, :plain) do from([a, o] in q, where: fragment( "? @@ plainto_tsquery(?)", o.fts_content, ^search_query ), order_by: [fragment("? <=> now()::date", o.inserted_at)] ) end defp query_with(q, :rum, search_query, :websearch) do from([a, o] in q, where: fragment( "? @@ websearch_to_tsquery(?)", o.fts_content, ^search_query ), order_by: [fragment("? <=> now()::date", o.inserted_at)] ) end defp maybe_restrict_local(q, user) do limit = Pleroma.Config.get([:instance, :limit_to_local_content], :unauthenticated) case {limit, user} do {:all, _} -> restrict_local(q) {:unauthenticated, %User{}} -> q {:unauthenticated, _} -> restrict_local(q) {false, _} -> q end end defp 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 [activity | activities] else _ -> activities end end end