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lib/tableau/extensions/post_extension/posts/post.ex
defmodule Tableau.PostExtension.Posts.Post do
@moduledoc false
def build(filename, attrs, body) do
{:ok, post_config} =
Tableau.PostExtension.Config.new(Map.new(Application.get_env(:tableau, Tableau.PostExtension, %{})))
Application.put_env(:date_time_parser, :include_zones_from, ~N[2010-01-01T00:00:00])
attrs
|> Map.put(:__tableau_post_extension__, true)
|> Map.put(:body, body)
|> Map.put(:file, filename)
|> Map.put(:layout, Module.concat([attrs[:layout] || post_config.layout]))
|> Map.put_new_lazy(:title, fn ->
with {:ok, document} <- Floki.parse_fragment(body),
[hd | _] <- Floki.find(document, "h1") do
Floki.text(hd)
else
_ -> nil
end
end)
|> Map.put(:date, DateTimeParser.parse_datetime!(attrs.date, assume_time: true, assume_utc: true))
|> build_permalink(post_config)
end
def parse(_file_path, content) do
Tableau.YamlFrontMatter.parse!(content, atoms: true)
end
defp build_permalink(%{permalink: permalink} = attrs, _config) do
permalink
|> transform_permalink(attrs)
|> then(&Map.put(attrs, :permalink, &1))
end
defp build_permalink(attrs, %{permalink: permalink}) when not is_nil(permalink) do
permalink
|> transform_permalink(attrs)
|> then(&Map.put(attrs, :permalink, &1))
end
defp build_permalink(%{file: filename} = attrs, _) do
filename
|> Path.rootname()
|> transform_permalink(attrs)
|> then(&Map.put(attrs, :permalink, &1))
end
defp transform_permalink(path, attrs) do
vars =
attrs
|> Map.new(fn {k, v} -> {":#{k}", v} end)
|> Map.merge(%{
":day" => attrs.date.day |> to_string() |> String.pad_leading(2, "0"),
":month" => attrs.date.month |> to_string() |> String.pad_leading(2, "0"),
":year" => attrs.date.year
})
path
|> String.replace(Map.keys(vars), &to_string(Map.fetch!(vars, &1)))
|> String.replace(" ", "-")
|> String.replace("_", "-")
|> String.replace(~r/[^[:alnum:]\/\-.]/, "")
|> String.downcase()
end
end