From 68b22892d053f9dc33682d5e88429b08c1a7dd58 Mon Sep 17 00:00:00 2001
From: Daniel Kempkens <daniel+git@kempkens.io>
Date: Thu, 26 Oct 2023 19:29:26 +0200
Subject: [PATCH] mastodon: Install BirdUI

---
 system/nixos/mastodon.nix | 63 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 62 insertions(+), 1 deletion(-)

diff --git a/system/nixos/mastodon.nix b/system/nixos/mastodon.nix
index e65f47c..207bb4c 100644
--- a/system/nixos/mastodon.nix
+++ b/system/nixos/mastodon.nix
@@ -2,12 +2,73 @@
 
 let
   web-domain = "mastodon.kempkens.io";
+
+  pkg-mastodon = pkgs.mastodon.overrideAttrs (_: {
+    mastodonModules = pkgs.mastodon.mastodonModules.overrideAttrs (oldMods:
+      let
+        # https://github.com/ronilaukkarinen/mastodon-bird-ui
+        birdui-version = "1.6.4";
+
+        birdui-single-column = builtins.fetchurl {
+          url = "https://raw.githubusercontent.com/ronilaukkarinen/mastodon-bird-ui/${birdui-version}/layout-single-column.css";
+          sha256 = "05wfq7v1vznq0jv12jm4h4nxg76rz6digjycc63rf3rh6jdz5dn9";
+        };
+
+        birdui-multi-column = builtins.fetchurl {
+          url = "https://raw.githubusercontent.com/ronilaukkarinen/mastodon-bird-ui/${birdui-version}/layout-multiple-columns.css";
+          sha256 = "17p5mg09kwfpn0xfhwpqax32k7zzr660agkfp36b95333hdy4cwa";
+        };
+      in
+      {
+        pname = "${oldMods.pname}+themes";
+
+        postPatch = ''
+          # Import theme
+          styleDir=$PWD/app/javascript/styles
+          birduiDir=$styleDir/mastodon-bird-ui
+
+          mkdir -p $birduiDir
+          cat ${birdui-single-column} >$birduiDir/layout-single-column.scss
+          cat ${birdui-multi-column} >$birduiDir/layout-multiple-columns.scss
+
+          sed -i 's/theme-contrast/theme-mastodon-bird-ui-contrast/g' $birduiDir/layout-single-column.scss
+          sed -i 's/theme-mastodon-light/theme-mastodon-bird-ui-light/g' $birduiDir/layout-single-column.scss
+
+          sed -i 's/theme-contrast/theme-mastodon-bird-ui-contrast/g' $birduiDir/layout-multiple-columns.scss
+          sed -i 's/theme-mastodon-light/theme-mastodon-bird-ui-light/g' $birduiDir/layout-multiple-columns.scss
+
+          echo -e "@import 'contrast/variables';\n@import 'application';\n@import 'contrast/diff';\n@import 'mastodon-bird-ui/layout-single-column.scss';\n@import 'mastodon-bird-ui/layout-multiple-columns.scss';" >$styleDir/mastodon-bird-ui-contrast.scss
+
+          echo -e "@import 'mastodon-light/variables';\n@import 'application';\n@import 'mastodon-light/diff';\n@import 'mastodon-bird-ui/layout-single-column.scss';\n@import 'mastodon-bird-ui/layout-multiple-columns.scss';" >$styleDir/mastodon-bird-ui-light.scss
+
+          echo -e "@import 'application';\n@import 'mastodon-bird-ui/layout-single-column.scss';\n@import 'mastodon-bird-ui/layout-multiple-columns.scss';" >$styleDir/mastodon-bird-ui-dark.scss
+
+          # Build theme
+          echo "mastodon-bird-ui-dark: styles/mastodon-bird-ui-dark.scss" >>$PWD/config/themes.yml
+          echo "mastodon-bird-ui-light: styles/mastodon-bird-ui-light.scss" >>$PWD/config/themes.yml
+          echo "mastodon-bird-ui-contrast: styles/mastodon-bird-ui-contrast.scss" >>$PWD/config/themes.yml
+        '';
+      });
+
+    nativeBuildInputs = [ pkgs.yq-go ];
+
+    postBuild = ''
+      # Make theme available
+      echo "mastodon-bird-ui-dark: styles/mastodon-bird-ui-dark.scss" >>$PWD/config/themes.yml
+      echo "mastodon-bird-ui-light: styles/mastodon-bird-ui-light.scss" >>$PWD/config/themes.yml
+      echo "mastodon-bird-ui-contrast: styles/mastodon-bird-ui-contrast.scss" >>$PWD/config/themes.yml
+
+      yq -i '.en.themes.mastodon-bird-ui-dark = "Mastodon Bird UI (Dark)"' $PWD/config/locales/en.yml
+      yq -i '.en.themes.mastodon-bird-ui-light = "Mastodon Bird UI (Light)"' $PWD/config/locales/en.yml
+      yq -i '.en.themes.mastodon-bird-ui-contrast = "Mastodon Bird UI (High contrast)"' $PWD/config/locales/en.yml
+    '';
+  });
 in
 {
   services.mastodon = {
     enable = true;
 
-    # package = pkgs.pkgs-master.mastodon;
+    package = pkg-mastodon;
 
     configureNginx = false;