defmodule Lain do
@moduledoc """
Documentation for `Lain`.
"""
use Phoenix.Component
require Logger
import Phoenix.LiveViewTest, only: [rendered_to_string: 1]
alias Lain.Frontmatter
alias Lain.Markdown
@base_caller __ENV__
def read(path) do
path
|> File.read!()
|> Frontmatter.front_matter_split()
|> then(fn {frontmatter_text, body_text} ->
{Frontmatter.make_frontmatter(path, frontmatter_text), body_text}
end)
|> then(fn {frontmatter, body_text} ->
body = Markdown.render(body_text)
Map.merge(frontmatter, %{"body" => body, "path" => path})
end)
end
def validate(%{"slug" => nil, "path" => path}) do
{:error, "slug missing from #{path}"}
end
def validate(%{"slug" => "", "path" => path}) do
{:error, "slug missing from #{path}"}
end
def validate(other), do: {:ok, other}
def clean(base_path) do
base_path
|> Path.join("**")
|> Path.wildcard()
|> Enum.each(fn path ->
if File.dir?(path) do
if !File.exists?(Path.join(path, ".keep")) do
File.exists?(path) && File.rm_rf!(path)
end
else
File.exists?(path) && File.rm!(path)
end
end)
end
def run(path) do
TreeSitter.install_and_run(["-V"])
posts =
path
|> Path.join("**/*.md")
|> Path.wildcard()
|> Enum.map(&read/1)
|> Enum.map(&validate/1)
|> Enum.filter(fn
{:error, error} ->
Logger.warning(error)
false
{:ok, _other} ->
true
end)
|> Enum.map(&elem(&1, 1))
|> Enum.sort_by(&Map.get(&1, "date"), :desc)
|> Enum.map(&atomize_keys/1)
make_feed(posts, path)
make_sitemap(posts, path)
index = make_index(posts)
Lain.LinkLog.run(path)
Lain.Static.run(path)
Enum.map([index | posts], &write_page(&1, path))
end
def atomize_keys(page) do
page
|> Enum.map(fn {key, value} -> {String.to_atom(key), value} end)
|> Enum.into(%{})
end
def make_index(posts) do
assigns = %{posts: posts}
body =
~H"""
<%= for post <- @posts do %>
<% end %>
"""
|> rendered_to_string()
%{
title: "Blog",
slug: "blog",
date: "2023-09-23",
body: body
}
end
def make_feed(posts, path) do
posts = posts |> Enum.reject(& &1.hidden) |> Enum.take(10)
base = Application.get_env(:lain, :base, "/")
assigns = %{base: base, posts: posts}
body =
EEx.eval_string(
"""
pre.hn
Robert Prehn's personal blog.
https://pre.hn
https://pre.hn/feed.rss
<%= for post <- @posts do %>
<%= HtmlSanitizeEx.strip_tags(post.title) %>
<%= post.body %>