fix!: improve slug generation (#51)

- will not remove periods from the permalink
- will turn underscores into dashes
- day and month will be padded with 0

Author: mhanberg

lib/tableau/extensions/page_extension/pages/page.ex

@@ -50,7 +50,8 @@ defmodule Tableau.PageExtension.Pages.Page do
     path
     |> String.replace(Map.keys(vars), &to_string(Map.fetch!(vars, &1)))
     |> String.replace(" ", "-")
-    |> String.replace(~r/[^[:alnum:]\/\-]/, "")
+    |> String.replace("_", "-")
+    |> String.replace(~r/[^[:alnum:]\/\-.]/, "")
     |> String.downcase()
   end
 end

lib/tableau/extensions/post_extension/posts/post.ex

@@ -51,15 +51,16 @@ defmodule Tableau.PostExtension.Posts.Post do
       attrs
       |> Map.new(fn {k, v} -> {":#{k}", v} end)
       |> Map.merge(%{
-        ":day" => attrs.date.day,
-        ":month" => attrs.date.month,
+        ":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(~r/[^[:alnum:]\/\-]/, "")
+    |> String.replace("_", "-")
+    |> String.replace(~r/[^[:alnum:]\/\-.]/, "")
     |> String.downcase()
   end
 end

test/tableau/extensions/post_extension/posts/post_test.exs

@@ -26,16 +26,16 @@ defmodule Tableau.PostExtension.Posts.PostTest do
         Post.build(
           "some/file/name.md",
           %{
-            title: "foo man chu",
+            title: "foo man chu_foo.js",
             type: "articles",
             permalink: "/:year/:month/:day/:title",
             layout: Some.Layout,
-            date: "2023-10-31 00:01:00"
+            date: "2023-02-01 00:01:00"
           },
           "hi"
         )
 
-      assert %{permalink: "/2023/10/31/foo-man-chu"} = actual
+      assert %{permalink: "/2023/02/01/foo-man-chu-foo.js"} = actual
     end
   end
 end