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# Pleroma: A lightweight social networking server
# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ControllerHelper do
use Pleroma.Web, :controller
# As in MastoAPI, per https://api.rubyonrails.org/classes/ActiveModel/Type/Boolean.html
@falsy_param_values [false, 0, "0", "f", "F", "false", "FALSE", "off", "OFF"]
def truthy_param?(blank_value) when blank_value in [nil, ""], do: nil
def truthy_param?(value), do: value not in @falsy_param_values
def json_response(conn, status, json) do
conn
|> put_status(status)
|> json(json)
end
@spec fetch_integer_param(map(), String.t(), integer() | nil) :: integer() | nil
def fetch_integer_param(params, name, default \\ nil) do
params
|> Map.get(name, default)
|> param_to_integer(default)
end
defp param_to_integer(val, _) when is_integer(val), do: val
defp param_to_integer(val, default) when is_binary(val) do
case Integer.parse(val) do
{res, _} -> res
_ -> default
end
end
defp param_to_integer(_, default), do: default
def add_link_headers(
conn,
method,
activities,
param \\ nil,
params \\ %{},
func3 \\ nil,
func4 \\ nil
) do
params =
conn.params
|> Map.drop(["since_id", "max_id", "min_id"])
|> Map.merge(params)
last = List.last(activities)
func3 = func3 || (&mastodon_api_url/3)
func4 = func4 || (&mastodon_api_url/4)
if last do
max_id = last.id
limit =
params
|> Map.get("limit", "20")
|> String.to_integer()
min_id =
if length(activities) <= limit do
activities
|> List.first()
|> Map.get(:id)
else
activities
|> Enum.at(limit * -1)
|> Map.get(:id)
end
{next_url, prev_url} =
if param do
{
func4.(
Pleroma.Web.Endpoint,
method,
param,
Map.merge(params, %{max_id: max_id})
),
func4.(
Pleroma.Web.Endpoint,
method,
param,
Map.merge(params, %{min_id: min_id})
)
}
else
{
func3.(
Pleroma.Web.Endpoint,
method,
Map.merge(params, %{max_id: max_id})
),
func3.(
Pleroma.Web.Endpoint,
method,
Map.merge(params, %{min_id: min_id})
)
}
end
conn
|> put_resp_header("link", "<#{next_url}>; rel=\"next\", <#{prev_url}>; rel=\"prev\"")
else
conn
end
end
end
|
