Added wallpapers and logic to rotate them

1 files changed, 40 insertions, 0 deletions

diff --git a/modules/darwin/random-wallpaper.nix b/modules/darwin/random-wallpaper.nix
new file mode 100644
index 0000000..6b17c0f
--- /dev/null
+++ b/modules/darwin/random-wallpaper.nix
@@ -0,0 +1,40 @@
+{ config, lib, pkgs, ... }:
+let
+  cfg = config.local.randomWallpaper;
+  script = pkgs.writeShellApplication {
+    name = "set-random-wallpaper";
+    runtimeInputs = [ pkgs.coreutils pkgs.findutils ];
+    text = ''
+      set -euo pipefail
+      img=$(find "${cfg.directory}" \
+        -type f \( -iname '*.jpg' -o -iname '*.jpeg' -o -iname '*.png' \) \
+        | shuf -n1)
+      [ -n "$img" ] || exit 0
+      /usr/bin/osascript -e "tell application \"System Events\" to tell every desktop to set picture to \"$img\""
+    '';
+  };
+in
+{
+  options.local.randomWallpaper = {
+    enable = lib.mkEnableOption "Random Rotating Wallpaper";
+    directory = lib.mkOption {
+      type = lib.types.str;
+      description = "Folder containing images";
+    };
+    interval = lib.mkOption {
+      type = lib.types.int;
+      default = 1800;
+      description = "Seconds between wallpaper changes";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    launchd.user.agents.random-wallpaper.serviceConfig = {
+      Label = "org.rschanz.wallpaperDaemon";
+      ProgramArguments = [ "${script}/bin/set-random-wallpaper" ];
+      StartInterval = cfg.interval;
+      RunAtLoad = true;
+      ProcessType = "Background";
+    };
+  };
+}