refactor

modules/nixos/services/cowsay-mastodon-poster/default.nix

@@ -0,0 +1,66 @@
+{ lib, pkgs, config, ... }:
+
+let
+  inherit (lib) types mkIf;
+  inherit (lib.plusultra) mkBoolOpt mkOpt;
+  inherit (pkgs) fortune toot;
+  inherit (pkgs.snowfallorg) cow2img;
+
+  cfg = config.plusultra.services.cowsay-mastodon-poster;
+
+  script = ''
+    if [ ! -f ~/.config/toot/config.json ]; then
+      echo "File ~/.config/toot/config.json does not exist. Run 'toot login_cli' first."
+      exit 1
+    fi
+
+    tmp_dir=$(mktemp -d)
+
+    pushd $tmp_dir > /dev/null
+      ${cow2img}/bin/cow2img --no-spinner ${if cfg.short then "--message \"$(${fortune}/bin/fortune -s)\"" else ""}
+
+      cow_name=$(cat ./cow/name)
+      cow_message=$(cat ./cow/message)
+
+      post="$cow_name saying:"$'\n\n'"$cow_message"
+
+      ${toot}/bin/toot post --media ./cow/image.png --description "$post" "#hachybots"
+    popd > /dev/null
+
+    rm -rf $tmp_dir
+  '';
+in
+{
+  options.plusultra.services.cowsay-mastodon-poster = with types; {
+    enable = mkBoolOpt false "Whether or not to enable cowsay posts.";
+    short = mkBoolOpt false "Use short fortunes only.";
+    user = mkOpt str config.plusultra.user.name "The user to run as.";
+    group = mkOpt str "users" "The group to run as.";
+  };
+
+  config = mkIf cfg.enable {
+    systemd = {
+      timers.cowsay-mastodon-poster = {
+        wantedBy = [ "timers.target" ];
+        timerConfig = {
+          # Run once a day at 10am.
+          OnCalendar = "*-*-* 10:00:00";
+          Unit = "cowsay-mastodon-poster.service";
+        };
+      };
+
+      services.cowsay-mastodon-poster = {
+        after = [ "network-online.target" ];
+        description = "Post a cowsay image to Mastodon.";
+
+        inherit script;
+
+        serviceConfig = {
+          Type = "oneshot";
+          User = cfg.user;
+          Group = cfg.group;
+        };
+      };
+    };
+  };
+}