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Collection of common IndieWeb utilites like authorship resolution, Webmention, post type discovery and IndieAuth.
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lib/microformats2/utility.ex
defmodule Microformats2.Utility do
@moduledoc false
def get_format(mf2, format) do
case Enum.fetch(extract(mf2, format), 0) do
{:ok, mf2} -> mf2
_ -> nil
end
end
def get_value(mf2, property, default_value \\ [])
def get_value(%{properties: properties}, property, default_value) do
Map.get(properties, property, default_value)
end
def get_value(_, _, _), do: {:error, :no_properties}
def fetch(uri) do
with(
{:ok, resp} <- IndieWeb.Http.get(uri),
mf2 when is_map(mf2) <- Microformats2.parse(resp.body, uri)
) do
{:ok, mf2}
else
error -> {:error, :remote_mf2_fetch_failed, reason: error}
end
end
def extract(mf2) when is_map(mf2) do
mf2 |> Map.take(~w(items children)a) |> Map.values() |> List.flatten()
end
def extract(_), do: []
def extract_deep(mf2) when is_map(mf2) do
items = extract(mf2) ++ do_extract_from_properties(mf2)
children = items |> Enum.map(&extract_deep/1) |> List.flatten()
items ++ children
end
def extract_deep(_), do: []
def extract_deep(mf2, type) do
mf2 |> extract_deep |> Enum.filter(&matches_type?(&1, type))
end
def extract(mf2, type) do
mf2 |> extract |> Enum.filter(&matches_type?(&1, type))
end
def matches_type?(mf2, type) when is_map(mf2) do
Enum.member?(Map.get(mf2, :type, []), "h-#{type}")
end
def matches_type?(_, _), do: false
defp do_extract_from_properties(%{properties: properties}) do
Enum.map(properties, fn {_, items} ->
Enum.map(items, fn
item when is_map(item) ->
item
_ ->
nil
end)
end)
|> List.flatten()
end
defp do_extract_from_properties(_), do: []
end