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# Pleroma: A lightweight social networking server
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.MastodonAPI.SearchController do
use Pleroma.Web, :controller
alias Pleroma.Activity
alias Pleroma.Plugs.OAuthScopesPlug
alias Pleroma.Plugs.RateLimiter
alias Pleroma.Repo
alias Pleroma.User
alias Pleroma.Web
alias Pleroma.Web.ControllerHelper
alias Pleroma.Web.MastodonAPI.AccountView
alias Pleroma.Web.MastodonAPI.StatusView
require Logger
# Note: Mastodon doesn't allow unauthenticated access (requires read:accounts / read:search)
plug(OAuthScopesPlug, %{scopes: ["read:search"], fallback: :proceed_unauthenticated})
plug(Pleroma.Plugs.EnsurePublicOrAuthenticatedPlug)
plug(RateLimiter, [name: :search] when action in [:search, :search2, :account_search])
def account_search(%{assigns: %{user: user}} = conn, %{"q" => query} = params) do
accounts = User.search(query, search_options(params, user))
conn
|> put_view(AccountView)
|> render("index.json", users: accounts, for: user, as: :user)
end
def search2(conn, params), do: do_search(:v2, conn, params)
def search(conn, params), do: do_search(:v1, conn, params)
defp do_search(version, %{assigns: %{user: user}} = conn, %{"q" => query} = params) do
options = search_options(params, user)
timeout = Keyword.get(Repo.config(), :timeout, 15_000)
default_values = %{"statuses" => [], "accounts" => [], "hashtags" => []}
result =
default_values
|> Enum.map(fn {resource, default_value} ->
if params["type"] in [nil, resource] do
{resource, fn -> resource_search(version, resource, query, options) end}
else
{resource, fn -> default_value end}
end
end)
|> Task.async_stream(fn {resource, f} -> {resource, with_fallback(f)} end,
timeout: timeout,
on_timeout: :kill_task
)
|> Enum.reduce(default_values, fn
{:ok, {resource, result}}, acc ->
Map.put(acc, resource, result)
_error, acc ->
acc
end)
json(conn, result)
end
defp search_options(params, user) do
[
resolve: params["resolve"] == "true",
following: params["following"] == "true",
limit: ControllerHelper.fetch_integer_param(params, "limit"),
offset: ControllerHelper.fetch_integer_param(params, "offset"),
type: params["type"],
author: get_author(params),
for_user: user
]
|> Enum.filter(&elem(&1, 1))
end
defp resource_search(_, "accounts", query, options) do
accounts = with_fallback(fn -> User.search(query, options) end)
AccountView.render("index.json", users: accounts, for: options[:for_user], as: :user)
end
defp resource_search(_, "statuses", query, options) do
statuses = with_fallback(fn -> Activity.search(options[:for_user], query, options) end)
StatusView.render("index.json", activities: statuses, for: options[:for_user], as: :activity)
end
defp resource_search(:v2, "hashtags", query, _options) do
tags_path = Web.base_url() <> "/tag/"
query
|> prepare_tags()
|> Enum.map(fn tag ->
tag = String.trim_leading(tag, "#")
%{name: tag, url: tags_path <> tag}
end)
end
defp resource_search(:v1, "hashtags", query, _options) do
query
|> prepare_tags()
|> Enum.map(fn tag -> String.trim_leading(tag, "#") end)
end
defp prepare_tags(query) do
query
|> String.split()
|> Enum.uniq()
|> Enum.filter(fn tag -> String.starts_with?(tag, "#") end)
end
defp with_fallback(f, fallback \\ []) do
try do
f.()
rescue
error ->
Logger.error("#{__MODULE__} search error: #{inspect(error)}")
fallback
end
end
defp get_author(%{"account_id" => account_id}) when is_binary(account_id),
do: User.get_cached_by_id(account_id)
defp get_author(_params), do: nil
end
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