1 # Pleroma: A lightweight social networking server
2 # Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
3 # SPDX-License-Identifier: AGPL-3.0-only
5 defmodule Pleroma.Web.ControllerHelper do
6 use Pleroma.Web, :controller
8 # As in MastoAPI, per https://api.rubyonrails.org/classes/ActiveModel/Type/Boolean.html
9 @falsy_param_values [false, 0, "0", "f", "F", "false", "False", "FALSE", "off", "OFF"]
10 def truthy_param?(blank_value) when blank_value in [nil, ""], do: nil
11 def truthy_param?(value), do: value not in @falsy_param_values
13 def json_response(conn, status, json) do
19 @spec fetch_integer_param(map(), String.t(), integer() | nil) :: integer() | nil
20 def fetch_integer_param(params, name, default \\ nil) do
22 |> Map.get(name, default)
23 |> param_to_integer(default)
26 defp param_to_integer(val, _) when is_integer(val), do: val
28 defp param_to_integer(val, default) when is_binary(val) do
29 case Integer.parse(val) do
35 defp param_to_integer(_, default), do: default
37 def add_link_headers(conn, activities, extra_params \\ %{})
39 def add_link_headers(%{assigns: %{skip_link_headers: true}} = conn, _activities, _extra_params),
42 def add_link_headers(conn, activities, extra_params) do
43 case List.last(activities) do
47 |> Map.drop(Map.keys(conn.path_params))
48 |> Map.drop(["since_id", "max_id", "min_id"])
49 |> Map.merge(extra_params)
53 |> Map.get("limit", "20")
54 |> String.to_integer()
57 if length(activities) <= limit do
63 |> Enum.at(limit * -1)
67 next_url = current_url(conn, Map.merge(params, %{max_id: max_id}))
68 prev_url = current_url(conn, Map.merge(params, %{min_id: min_id}))
70 put_resp_header(conn, "link", "<#{next_url}>; rel=\"next\", <#{prev_url}>; rel=\"prev\"")
77 def assign_account_by_id(%{params: %{"id" => id}} = conn, _) do
78 case Pleroma.User.get_cached_by_id(id) do
79 %Pleroma.User{} = account -> assign(conn, :account, account)
80 nil -> Pleroma.Web.MastodonAPI.FallbackController.call(conn, {:error, :not_found}) |> halt()
84 def try_render(conn, target, params) when is_binary(target) do
85 case render(conn, target, params) do
86 nil -> render_error(conn, :not_implemented, "Can't display this activity")
91 def try_render(conn, _, _) do
92 render_error(conn, :not_implemented, "Can't display this activity")
95 @spec put_if_exist(map(), atom() | String.t(), any) :: map()
96 def put_if_exist(map, _key, nil), do: map
98 def put_if_exist(map, key, value), do: Map.put(map, key, value)