Add modules/shared/syscfg/media.nix

modules/shared/syscfg/media.nix

@@ -0,0 +1,51 @@
+{ lib, ... }:
+let
+  mediaDir = ../media;
+  mainDir = mediaDir + "/main";
+  maybePath = rel:
+    let path = mediaDir + "/${rel}";
+    in if builtins.pathExists path then path else null;
+  mainImages =
+    let
+      names = builtins.attrNames (builtins.readDir mainDir);
+      isImage = name: builtins.match ".*\\.(png|jpg|jpeg|webp|svg)$" name != null;
+    in
+    map (name: mainDir + "/${name}") (lib.sort builtins.lessThan (lib.filter isImage names));
+in
+with lib; {
+  logo = {
+    ico = mkOption {
+      type = types.path;
+      default = mediaDir + "/logo.ico";
+    };
+    svg = mkOption {
+      type = types.path;
+      default = mediaDir + "/logo.svg";
+    };
+    png = mkOption {
+      type = types.path;
+      default = mediaDir + "/logo.png";
+    };
+  };
+
+  banner = {
+    svg = mkOption {
+      type = types.nullOr types.path;
+      default = maybePath "banner.svg";
+    };
+    png = mkOption {
+      type = types.nullOr types.path;
+      default = maybePath "banner.png";
+    };
+  };
+
+  main = mkOption {
+    type = types.listOf types.path;
+    default = if mainImages != [ ] then mainImages else lib.optional (maybePath "main/bg.png" != null) (mediaDir + "/main/bg.png");
+  };
+
+  bg = mkOption {
+    type = types.path;
+    default = let bg = maybePath "main/bg.png"; in if bg != null then bg else builtins.head mainImages;
+  };
+}