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