forked from potsda.mn/mobilizon
55 lines
1.8 KiB
Elixir
55 lines
1.8 KiB
Elixir
# Portions of this file are derived from Pleroma:
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# Copyright © 2017-2018 Pleroma Authors <https://pleroma.social>
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# SPDX-License-Identifier: AGPL-3.0-only
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# Upstream: https://git.pleroma.social/pleroma/pleroma/blob/develop/lib/xml_builder.ex
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defmodule Mobilizon.Federation.WebFinger.XmlBuilder do
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@moduledoc """
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Extremely basic XML encoder. Builds XRD for WebFinger host_meta.
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"""
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@typep content :: list({tag :: atom(), attributes :: map()}) | String.t()
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@typep document :: {tag :: atom(), attributes :: map(), content :: content}
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@doc """
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Return the XML representation for a document.
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"""
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@spec to_doc(document :: document) :: String.t()
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def to_doc(document), do: ~s(<?xml version="1.0" encoding="UTF-8"?>) <> to_xml(document)
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@spec to_xml(document) :: String.t()
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@spec to_xml({tag :: atom(), attributes :: map()}) :: String.t()
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@spec to_xml({tag :: atom(), content :: content}) :: String.t()
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@spec to_xml(content :: content) :: String.t()
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defp to_xml({tag, attributes, content}) do
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open_tag = make_open_tag(tag, attributes)
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content_xml = to_xml(content)
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"<#{open_tag}>#{content_xml}</#{tag}>"
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end
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defp to_xml({tag, %{} = attributes}) do
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open_tag = make_open_tag(tag, attributes)
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"<#{open_tag} />"
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end
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defp to_xml({tag, content}), do: to_xml({tag, %{}, content})
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defp to_xml(content) when is_binary(content), do: to_string(content)
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defp to_xml(content) when is_list(content) do
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Enum.map_join(content, &to_xml/1)
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end
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defp to_xml(%NaiveDateTime{} = time), do: NaiveDateTime.to_iso8601(time)
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@spec make_open_tag(tag :: atom, attributes :: map()) :: String.t()
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defp make_open_tag(tag, attributes) do
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attributes_string =
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Enum.map_join(attributes, " ", fn {attribute, value} -> "#{attribute}=\"#{value}\"" end)
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[to_string(tag), attributes_string] |> Enum.join(" ") |> String.trim()
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end
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end
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