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add doc_to_xml method for converting doc to xml string #45

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add doc_to_xml method for converting doc to xml string #45

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21 changes: 20 additions & 1 deletion lib/sweet_xml.ex
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Original file line number Diff line number Diff line change
Expand Up @@ -445,7 +445,6 @@ defmodule SweetXml do
get_current_entities(parent, spec) |> spec.transform_fun.()
end


def xpath(parent, sweet_xpath, subspec) do
if sweet_xpath.is_list do
current_entities = xpath(parent, sweet_xpath)
Expand Down Expand Up @@ -554,6 +553,26 @@ defmodule SweetXml do
%{sweet_xpath | transform_fun: fun}
end

@doc ~S"""
Convert `doc` to XML string

## Examples

iex> import SweetXml
iex> "<h1><a>Some linked title</a></h1>"
...> |> parse()
...> |> doc_to_xml()
"<?xml version=\"1.0\"?><h1><a>Some linked title</a></h1>"
iex> "<body><header><ul><li>One</li><li><a>Two</a></li></ul></header></body>"
...> |> parse()
...> |> xpath(~x"/body/header/ul"e)
...> |> doc_to_xml()
"<?xml version=\"1.0\"?><ul><li>One</li><li><a>Two</a></li></ul>"
"""
def doc_to_xml(doc) do
:xmerl.export([doc], :xmerl_xml) |> List.flatten() |> List.to_string()
end

defp _value(entity) do
cond do
is_record? entity, :xmlText ->
Expand Down