79 lines
2.1 KiB
Elixir
79 lines
2.1 KiB
Elixir
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defmodule SloaneSH.Assets.Markdown do
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@moduledoc """
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Helper to define markdown, html, and eex templating for pages and posts
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"""
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defmacro __using__(opts) do
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type = Keyword.fetch!(opts, :type)
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quote do
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alias SloaneSH.Asset
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alias SloaneSH.FrontMatter
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alias SloaneSH.Layouts
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alias SloaneSH.OutputDirs
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@behaviour Asset
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@impl Asset
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def extensions(_cfg), do: ~w[.md .html .md.eex .html.eex]
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@impl Asset
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def attrs(cfg, path, data) do
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{:ok, attrs, without_attrs} = FrontMatter.parse(data)
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attrs =
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Map.put_new_lazy(attrs, :permalink, fn ->
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output = apply(OutputDirs, unquote(type), [cfg, path])
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permalink = OutputDirs.to_permalink(cfg, output)
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end)
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attrs = handle_attrs(cfg, path, without_attrs, attrs)
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{:ok, attrs, without_attrs}
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end
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@impl Asset
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def render(cfg, ctx, path, data, attrs) do
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output_path =
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if attrs[:permalink] do
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OutputDirs.from_permalink(cfg, attrs[:permalink])
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else
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apply(OutputDirs, unquote(type), [cfg, path])
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end
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output = {output_path, do_render(ctx, path, data, attrs)}
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{:ok, [output]}
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end
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defp do_render(ctx, path, data, attrs) when is_binary(path) do
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do_render(ctx, base_and_ext(path), data, attrs)
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end
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defp do_render(ctx, {path, ".eex"}, data, attrs) do
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eexed = EEx.eval_string(data, ctx: ctx, attrs: attrs)
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do_render(ctx, base_and_ext(path), eexed, attrs)
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end
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defp do_render(ctx, {path, ".md"}, data, attrs) do
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html = Earmark.as_html!(data)
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do_render(ctx, {path, ".html"}, html, attrs)
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end
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defp do_render(ctx, {_path, ".html"}, data, attrs) do
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apply(Layouts, unquote(type), [data, ctx, attrs])
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end
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defp base_and_ext(path) do
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ext = Path.extname(path)
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base = Path.basename(path, ext)
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{base, ext}
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end
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def handle_attrs(cfg, path, data, attrs) do
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attrs
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end
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defoverridable handle_attrs: 4
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end
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end
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end
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